680 lines
		
	
	
		
			29 KiB
		
	
	
	
		
			Java
		
	
	
	
			
		
		
	
	
			680 lines
		
	
	
		
			29 KiB
		
	
	
	
		
			Java
		
	
	
	
| /*
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|  * Copyright (C) 2016 The Android Open Source Project
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|  *
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|  * Licensed under the Apache License, Version 2.0 (the "License");
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|  * you may not use this file except in compliance with the License.
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|  * You may obtain a copy of the License at
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|  *
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|  *      http://www.apache.org/licenses/LICENSE-2.0
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|  *
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|  * Unless required by applicable law or agreed to in writing, software
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|  * distributed under the License is distributed on an "AS IS" BASIS,
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|  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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|  * See the License for the specific language governing permissions and
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|  * limitations under the License
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|  */
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| 
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| package android.telecom;
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| 
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| import android.Manifest;
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| import android.annotation.IntDef;
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| import android.annotation.NonNull;
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| import android.annotation.RequiresPermission;
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| import android.annotation.SdkConstant;
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| import android.annotation.SystemApi;
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| import android.app.Service;
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| import android.content.ComponentName;
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| import android.content.Intent;
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| import android.content.pm.ServiceInfo;
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| import android.net.Uri;
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| import android.os.Handler;
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| import android.os.IBinder;
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| import android.os.Looper;
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| import android.os.Message;
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| import android.os.Parcel;
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| import android.os.Parcelable;
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| import android.os.RemoteException;
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| 
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| import com.android.internal.os.SomeArgs;
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| import com.android.internal.telecom.ICallScreeningAdapter;
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| import com.android.internal.telecom.ICallScreeningService;
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| 
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| import java.lang.annotation.Retention;
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| import java.lang.annotation.RetentionPolicy;
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| import java.util.Objects;
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| 
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| /**
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|  * This service can be implemented by the default dialer (see
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|  * {@link TelecomManager#getDefaultDialerPackage()}) or a third party app to allow or disallow
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|  * incoming calls before they are shown to a user. A {@link CallScreeningService} can also see
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|  * outgoing calls for the purpose of providing caller ID services for those calls.
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|  * <p>
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|  * Below is an example manifest registration for a {@code CallScreeningService}.
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|  * <pre>
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|  * {@code
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|  * <service android:name="your.package.YourCallScreeningServiceImplementation"
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|  *          android:permission="android.permission.BIND_SCREENING_SERVICE">
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|  *      <intent-filter>
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|  *          <action android:name="android.telecom.CallScreeningService"/>
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|  *      </intent-filter>
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|  * </service>
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|  * }
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|  * </pre>
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|  * <p>
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|  * A CallScreeningService performs two functions:
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|  * <ol>
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|  *     <li>Call blocking/screening - the service can choose which calls will ring on the user's
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|  *     device, and which will be silently sent to voicemail.</li>
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|  *     <li>Call identification - services which provide call identification functionality can
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|  *     display a user-interface of their choosing which contains identifying information for a call.
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|  *     </li>
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|  * </ol>
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|  * <p>
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|  * <h2>Becoming the CallScreeningService</h2>
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|  * Telecom will bind to a single app chosen by the user which implements the
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|  * {@link CallScreeningService} API when there are new incoming and outgoing calls.
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|  * <p>
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|  * The code snippet below illustrates how your app can request that it fills the call screening
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|  * role.
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|  * <pre>
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|  * {@code
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|  * private static final int REQUEST_ID = 1;
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|  *
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|  * public void requestRole() {
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|  *     RoleManager roleManager = (RoleManager) getSystemService(ROLE_SERVICE);
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|  *     Intent intent = roleManager.createRequestRoleIntent(RoleManager.ROLE_CALL_SCREENING);
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|  *     startActivityForResult(intent, REQUEST_ID);
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|  * }
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|  *
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|  * @Override
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|  * public void onActivityResult(int requestCode, int resultCode, Intent data) {
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|  *     if (requestCode == REQUEST_ID) {
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|  *         if (resultCode == android.app.Activity.RESULT_OK) {
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|  *             // Your app is now the call screening app
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|  *         } else {
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|  *             // Your app is not the call screening app
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|  *         }
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|  *     }
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|  * }
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|  * }
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|  * </pre>
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|  *
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|  * <h2>CallScreeningService Lifecycle</h2>
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|  *
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|  * The framework binds to the {@link CallScreeningService} implemented by the user-chosen app
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|  * filling the {@link android.app.role.RoleManager#ROLE_CALL_SCREENING} role when incoming calls are
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|  * received (prior to ringing) and when outgoing calls are placed.  The platform calls the
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|  * {@link #onScreenCall(Call.Details)} method to provide your service with details about the call.
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|  * <p>
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|  * For incoming calls, the {@link CallScreeningService} must call
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|  * {@link #respondToCall(Call.Details, CallResponse)} within 5 seconds of being bound to indicate to
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|  * the platform whether the call should be blocked or not.  Your app must do this even if it is
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|  * primarily performing caller ID operations and not screening calls.  It is important to perform
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|  * screening operations in a timely matter as the user's device will not begin ringing until the
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|  * response is received (or the timeout is hit).  A {@link CallScreeningService} may choose to
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|  * perform local database lookups to help determine if a call should be screened or not; care should
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|  * be taken to ensure the timeout is not repeatedly hit, causing delays in the incoming call flow.
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|  * <p>
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|  * If your app provides a caller ID experience, it should launch an activity to show the caller ID
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|  * information from {@link #onScreenCall(Call.Details)}.
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|  */
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| public abstract class CallScreeningService extends Service {
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|     /**
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|      * The {@link Intent} that must be declared as handled by the service.
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|      */
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|     @SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION)
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|     public static final String SERVICE_INTERFACE = "android.telecom.CallScreeningService";
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| 
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|     private static final int MSG_SCREEN_CALL = 1;
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| 
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|     private final Handler mHandler = new Handler(Looper.getMainLooper()) {
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|         @Override
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|         public void handleMessage(Message msg) {
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|             switch (msg.what) {
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|                 case MSG_SCREEN_CALL:
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|                     SomeArgs args = (SomeArgs) msg.obj;
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|                     try {
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|                         mCallScreeningAdapter = (ICallScreeningAdapter) args.arg1;
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|                         Call.Details callDetails = Call.Details
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|                                 .createFromParcelableCall((ParcelableCall) args.arg2);
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|                         onScreenCall(callDetails);
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|                         if (callDetails.getCallDirection() == Call.Details.DIRECTION_OUTGOING) {
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|                             mCallScreeningAdapter.onScreeningResponse(
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|                                     callDetails.getTelecomCallId(),
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|                                     new ComponentName(getPackageName(), getClass().getName()),
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|                                     null);
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|                         }
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|                     } catch (RemoteException e) {
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|                         Log.w(this, "Exception when screening call: " + e);
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|                     } finally {
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|                         args.recycle();
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|                     }
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|                     break;
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|             }
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|         }
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|     };
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| 
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|     private final class CallScreeningBinder extends ICallScreeningService.Stub {
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|         @Override
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|         public void screenCall(ICallScreeningAdapter adapter, ParcelableCall call) {
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|             Log.v(this, "screenCall");
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|             SomeArgs args = SomeArgs.obtain();
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|             args.arg1 = adapter;
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|             args.arg2 = call;
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|             mHandler.obtainMessage(MSG_SCREEN_CALL, args).sendToTarget();
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|         }
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|     }
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| 
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|     private ICallScreeningAdapter mCallScreeningAdapter;
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| 
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|     /**
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|      * Parcelable version of {@link CallResponse} used to do IPC.
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|      * @hide
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|      */
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|     public static class ParcelableCallResponse implements Parcelable {
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|         private final boolean mShouldDisallowCall;
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|         private final boolean mShouldRejectCall;
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|         private final boolean mShouldSilenceCall;
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|         private final boolean mShouldSkipCallLog;
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|         private final boolean mShouldSkipNotification;
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|         private final boolean mShouldScreenCallViaAudioProcessing;
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| 
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|         private final int mCallComposerAttachmentsToShow;
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| 
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|         private ParcelableCallResponse(
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|                 boolean shouldDisallowCall,
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|                 boolean shouldRejectCall,
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|                 boolean shouldSilenceCall,
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|                 boolean shouldSkipCallLog,
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|                 boolean shouldSkipNotification,
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|                 boolean shouldScreenCallViaAudioProcessing,
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|                 int callComposerAttachmentsToShow) {
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|             mShouldDisallowCall = shouldDisallowCall;
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|             mShouldRejectCall = shouldRejectCall;
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|             mShouldSilenceCall = shouldSilenceCall;
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|             mShouldSkipCallLog = shouldSkipCallLog;
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|             mShouldSkipNotification = shouldSkipNotification;
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|             mShouldScreenCallViaAudioProcessing = shouldScreenCallViaAudioProcessing;
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|             mCallComposerAttachmentsToShow = callComposerAttachmentsToShow;
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|         }
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| 
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|         protected ParcelableCallResponse(Parcel in) {
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|             mShouldDisallowCall = in.readBoolean();
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|             mShouldRejectCall = in.readBoolean();
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|             mShouldSilenceCall = in.readBoolean();
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|             mShouldSkipCallLog = in.readBoolean();
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|             mShouldSkipNotification = in.readBoolean();
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|             mShouldScreenCallViaAudioProcessing = in.readBoolean();
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|             mCallComposerAttachmentsToShow = in.readInt();
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|         }
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| 
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|         public CallResponse toCallResponse() {
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|             return new CallResponse.Builder()
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|                     .setDisallowCall(mShouldDisallowCall)
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|                     .setRejectCall(mShouldRejectCall)
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|                     .setSilenceCall(mShouldSilenceCall)
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|                     .setSkipCallLog(mShouldSkipCallLog)
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|                     .setSkipNotification(mShouldSkipNotification)
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|                     .setShouldScreenCallViaAudioProcessing(mShouldScreenCallViaAudioProcessing)
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|                     .setCallComposerAttachmentsToShow(mCallComposerAttachmentsToShow)
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|                     .build();
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|         }
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| 
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|         public boolean shouldDisallowCall() {
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|             return mShouldDisallowCall;
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|         }
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| 
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|         public boolean shouldRejectCall() {
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|             return mShouldRejectCall;
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|         }
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| 
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|         public boolean shouldSilenceCall() {
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|             return mShouldSilenceCall;
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|         }
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| 
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|         public boolean shouldSkipCallLog() {
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|             return mShouldSkipCallLog;
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|         }
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| 
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|         public boolean shouldSkipNotification() {
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|             return mShouldSkipNotification;
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|         }
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| 
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|         public boolean shouldScreenCallViaAudioProcessing() {
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|             return mShouldScreenCallViaAudioProcessing;
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|         }
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| 
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|         public int getCallComposerAttachmentsToShow() {
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|             return mCallComposerAttachmentsToShow;
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|         }
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| 
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|         public static final Creator<ParcelableCallResponse> CREATOR =
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|                 new Creator<ParcelableCallResponse>() {
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|                     @Override
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|                     public ParcelableCallResponse createFromParcel(Parcel in) {
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|                         return new ParcelableCallResponse(in);
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|                     }
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| 
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|                     @Override
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|                     public ParcelableCallResponse[] newArray(int size) {
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|                         return new ParcelableCallResponse[size];
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|                     }
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|                 };
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| 
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|         @Override
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|         public int describeContents() {
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|             return 0;
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|         }
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| 
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|         @Override
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|         public void writeToParcel(Parcel dest, int flags) {
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|             dest.writeBoolean(mShouldDisallowCall);
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|             dest.writeBoolean(mShouldRejectCall);
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|             dest.writeBoolean(mShouldSilenceCall);
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|             dest.writeBoolean(mShouldSkipCallLog);
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|             dest.writeBoolean(mShouldSkipNotification);
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|             dest.writeBoolean(mShouldScreenCallViaAudioProcessing);
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|             dest.writeInt(mCallComposerAttachmentsToShow);
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|         }
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|     }
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| 
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|     /**
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|      * Information about how to respond to an incoming call. Call screening apps can construct an
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|      * instance of this class using {@link CallResponse.Builder}.
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|      */
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|     public static class CallResponse {
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|         /**
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|          * Bit flag indicating whether to show the picture attachment for call composer.
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|          *
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|          * Used with {@link Builder#setCallComposerAttachmentsToShow(int)}.
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|          */
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|         public static final int CALL_COMPOSER_ATTACHMENT_PICTURE = 1;
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| 
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|         /**
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|          * Bit flag indicating whether to show the location attachment for call composer.
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|          *
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|          * Used with {@link Builder#setCallComposerAttachmentsToShow(int)}.
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|          */
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|         public static final int CALL_COMPOSER_ATTACHMENT_LOCATION = 1 << 1;
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| 
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|         /**
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|          * Bit flag indicating whether to show the subject attachment for call composer.
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|          *
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|          * Used with {@link Builder#setCallComposerAttachmentsToShow(int)}.
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|          */
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|         public static final int CALL_COMPOSER_ATTACHMENT_SUBJECT = 1 << 2;
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| 
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|         /**
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|          * Bit flag indicating whether to show the priority attachment for call composer.
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|          *
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|          * Used with {@link Builder#setCallComposerAttachmentsToShow(int)}.
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|          */
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|         public static final int CALL_COMPOSER_ATTACHMENT_PRIORITY = 1 << 3;
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| 
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|         /** @hide */
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|         @Retention(RetentionPolicy.SOURCE)
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|         @IntDef(prefix = "CALL_COMPOSER_ATTACHMENT_", flag = true,
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|                 value = {
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|                         CALL_COMPOSER_ATTACHMENT_PICTURE,
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|                         CALL_COMPOSER_ATTACHMENT_LOCATION,
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|                         CALL_COMPOSER_ATTACHMENT_SUBJECT,
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|                         CALL_COMPOSER_ATTACHMENT_PRIORITY
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|                 }
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|         )
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|         public @interface CallComposerAttachmentType {}
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| 
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|         private static final int NUM_CALL_COMPOSER_ATTACHMENT_TYPES = 4;
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| 
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|         private final boolean mShouldDisallowCall;
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|         private final boolean mShouldRejectCall;
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|         private final boolean mShouldSilenceCall;
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|         private final boolean mShouldSkipCallLog;
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|         private final boolean mShouldSkipNotification;
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|         private final boolean mShouldScreenCallViaAudioProcessing;
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|         private final int mCallComposerAttachmentsToShow;
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| 
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|         private CallResponse(
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|                 boolean shouldDisallowCall,
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|                 boolean shouldRejectCall,
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|                 boolean shouldSilenceCall,
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|                 boolean shouldSkipCallLog,
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|                 boolean shouldSkipNotification,
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|                 boolean shouldScreenCallViaAudioProcessing,
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|                 int callComposerAttachmentsToShow) {
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|             if (!shouldDisallowCall
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|                     && (shouldRejectCall || shouldSkipCallLog || shouldSkipNotification)) {
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|                 throw new IllegalStateException("Invalid response state for allowed call.");
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|             }
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| 
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|             if (shouldDisallowCall && shouldScreenCallViaAudioProcessing) {
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|                 throw new IllegalStateException("Invalid response state for allowed call.");
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|             }
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| 
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|             mShouldDisallowCall = shouldDisallowCall;
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|             mShouldRejectCall = shouldRejectCall;
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|             mShouldSkipCallLog = shouldSkipCallLog;
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|             mShouldSkipNotification = shouldSkipNotification;
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|             mShouldSilenceCall = shouldSilenceCall;
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|             mShouldScreenCallViaAudioProcessing = shouldScreenCallViaAudioProcessing;
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|             mCallComposerAttachmentsToShow = callComposerAttachmentsToShow;
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|         }
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| 
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|         /*
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|          * @return Whether the incoming call should be blocked.
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|          */
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|         public boolean getDisallowCall() {
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|             return mShouldDisallowCall;
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|         }
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| 
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|         /*
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|          * @return Whether the incoming call should be disconnected as if the user had manually
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|          * rejected it.
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|          */
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|         public boolean getRejectCall() {
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|             return mShouldRejectCall;
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|         }
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| 
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|         /*
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|          * @return Whether the ringtone should be silenced for the incoming call.
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|          */
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|         public boolean getSilenceCall() {
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|             return mShouldSilenceCall;
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|         }
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| 
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|         /*
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|          * @return Whether the incoming call should not be displayed in the call log.
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|          */
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|         public boolean getSkipCallLog() {
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|             return mShouldSkipCallLog;
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|         }
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| 
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|         /*
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|          * @return Whether a missed call notification should not be shown for the incoming call.
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|          */
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|         public boolean getSkipNotification() {
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|             return mShouldSkipNotification;
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|         }
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| 
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|         /**
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|          * @return Whether we should enter the {@link Call#STATE_AUDIO_PROCESSING} state to allow
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|          * for further screening of the call.
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|          * @hide
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|          */
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|         public boolean getShouldScreenCallViaAudioProcessing() {
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|             return mShouldScreenCallViaAudioProcessing;
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|         }
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| 
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|         /**
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|          * @return A bitmask of call composer attachments that should be shown to the user.
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|          */
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|         public @CallComposerAttachmentType int getCallComposerAttachmentsToShow() {
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|             return mCallComposerAttachmentsToShow;
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|         }
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| 
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|         /** @hide */
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|         public ParcelableCallResponse toParcelable() {
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|             return new ParcelableCallResponse(
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|                     mShouldDisallowCall,
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|                     mShouldRejectCall,
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|                     mShouldSilenceCall,
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|                     mShouldSkipCallLog,
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|                     mShouldSkipNotification,
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|                     mShouldScreenCallViaAudioProcessing,
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|                     mCallComposerAttachmentsToShow
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|             );
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|         }
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| 
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|         @Override
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|         public boolean equals(Object o) {
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|             if (this == o) return true;
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|             if (o == null || getClass() != o.getClass()) return false;
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|             CallResponse that = (CallResponse) o;
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|             return mShouldDisallowCall == that.mShouldDisallowCall &&
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|                     mShouldRejectCall == that.mShouldRejectCall &&
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|                     mShouldSilenceCall == that.mShouldSilenceCall &&
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|                     mShouldSkipCallLog == that.mShouldSkipCallLog &&
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|                     mShouldSkipNotification == that.mShouldSkipNotification &&
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|                     mShouldScreenCallViaAudioProcessing
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|                             == that.mShouldScreenCallViaAudioProcessing &&
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|                     mCallComposerAttachmentsToShow == that.mCallComposerAttachmentsToShow;
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|         }
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| 
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|         @Override
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|         public int hashCode() {
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|             return Objects.hash(mShouldDisallowCall, mShouldRejectCall, mShouldSilenceCall,
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|                     mShouldSkipCallLog, mShouldSkipNotification,
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|                     mShouldScreenCallViaAudioProcessing,
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|                     mCallComposerAttachmentsToShow);
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|         }
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| 
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|         public static class Builder {
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|             private boolean mShouldDisallowCall;
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|             private boolean mShouldRejectCall;
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|             private boolean mShouldSilenceCall;
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|             private boolean mShouldSkipCallLog;
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|             private boolean mShouldSkipNotification;
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|             private boolean mShouldScreenCallViaAudioProcessing;
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|             private int mCallComposerAttachmentsToShow = -1;
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| 
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|             /**
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|              * Sets whether the incoming call should be blocked.
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|              */
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|             public Builder setDisallowCall(boolean shouldDisallowCall) {
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|                 mShouldDisallowCall = shouldDisallowCall;
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|                 return this;
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|             }
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| 
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|             /**
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|              * Sets whether the incoming call should be disconnected as if the user had manually
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|              * rejected it. This property should only be set to true if the call is disallowed.
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|              */
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|             public Builder setRejectCall(boolean shouldRejectCall) {
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|                 mShouldRejectCall = shouldRejectCall;
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|                 return this;
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|             }
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| 
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|             /**
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|              * Sets whether ringing should be silenced for the incoming call.  When set
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|              * to {@code true}, the Telecom framework will not play a ringtone for the call.
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|              * The call will, however, still be sent to the default dialer app if it is not blocked.
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|              * A {@link CallScreeningService} can use this to ensure a potential nuisance call is
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|              * still surfaced to the user, but in a less intrusive manner.
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|              *
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|              * Setting this to true only makes sense when the call has not been disallowed
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|              * using {@link #setDisallowCall(boolean)}.
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|              */
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|             public @NonNull Builder setSilenceCall(boolean shouldSilenceCall) {
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|                 mShouldSilenceCall = shouldSilenceCall;
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|                 return this;
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|             }
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| 
 | |
|             /**
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|              * Sets whether the incoming call should not be displayed in the call log. This property
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|              * should only be set to true if the call is disallowed.
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|              * <p>
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|              * Note: Calls will still be logged with type
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|              * {@link android.provider.CallLog.Calls#BLOCKED_TYPE}, regardless of how this property
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|              * is set.
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|              */
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|             public Builder setSkipCallLog(boolean shouldSkipCallLog) {
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|                 mShouldSkipCallLog = shouldSkipCallLog;
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|                 return this;
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|             }
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| 
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|             /**
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|              * Sets whether a missed call notification should not be shown for the incoming call.
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|              * This property should only be set to true if the call is disallowed.
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|              */
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|             public Builder setSkipNotification(boolean shouldSkipNotification) {
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|                 mShouldSkipNotification = shouldSkipNotification;
 | |
|                 return this;
 | |
|             }
 | |
| 
 | |
|             /**
 | |
|              * Sets whether to request background audio processing so that the in-call service can
 | |
|              * screen the call further. If set to {@code true}, {@link #setDisallowCall} should be
 | |
|              * called with {@code false}, and all other parameters in this builder will be ignored.
 | |
|              * <p>
 | |
|              * This request will only be honored if the {@link CallScreeningService} shares the same
 | |
|              * uid as the system dialer app. Otherwise, the call will go through as usual.
 | |
|              * <p>
 | |
|              * Apps built with SDK version {@link android.os.Build.VERSION_CODES#R} or later which
 | |
|              * are using the microphone as part of audio processing should specify the
 | |
|              * foreground service type using the attribute
 | |
|              * {@link android.R.attr#foregroundServiceType} in the {@link CallScreeningService}
 | |
|              * service element of the app's manifest file.
 | |
|              * The {@link ServiceInfo#FOREGROUND_SERVICE_TYPE_MICROPHONE} attribute should be
 | |
|              * specified.
 | |
|              * @see
 | |
|              * <a href="https://developer.android.com/preview/privacy/foreground-service-types">
 | |
|              *     the Android Developer Site</a> for more information.
 | |
|              *
 | |
|              * @param shouldScreenCallViaAudioProcessing Whether to request further call screening.
 | |
|              * @hide
 | |
|              */
 | |
|             @SystemApi
 | |
|             @RequiresPermission(Manifest.permission.CAPTURE_AUDIO_OUTPUT)
 | |
|             public @NonNull Builder setShouldScreenCallViaAudioProcessing(
 | |
|                     boolean shouldScreenCallViaAudioProcessing) {
 | |
|                 mShouldScreenCallViaAudioProcessing = shouldScreenCallViaAudioProcessing;
 | |
|                 return this;
 | |
|             }
 | |
| 
 | |
|             /**
 | |
|              * Sets the call composer attachments that should be shown to the user.
 | |
|              *
 | |
|              * Attachments that are not shown will not be passed to the in-call UI responsible for
 | |
|              * displaying the call to the user.
 | |
|              *
 | |
|              * If this method is not called on a {@link Builder}, all attachments will be shown,
 | |
|              * except pictures, which will only be shown to users if the call is from a contact.
 | |
|              *
 | |
|              * Setting attachments to show will have no effect if the call screening service does
 | |
|              * not belong to the same package as the system dialer (as returned by
 | |
|              * {@link TelecomManager#getSystemDialerPackage()}).
 | |
|              *
 | |
|              * @param callComposerAttachmentsToShow A bitmask of call composer attachments to show.
 | |
|              */
 | |
|             public @NonNull Builder setCallComposerAttachmentsToShow(
 | |
|                     @CallComposerAttachmentType int callComposerAttachmentsToShow) {
 | |
|                 // If the argument is less than zero (meaning unset), no-op since the conversion
 | |
|                 // to/from the parcelable version may call with that value.
 | |
|                 if (callComposerAttachmentsToShow < 0) {
 | |
|                     return this;
 | |
|                 }
 | |
| 
 | |
|                 if ((callComposerAttachmentsToShow
 | |
|                         & (1 << NUM_CALL_COMPOSER_ATTACHMENT_TYPES)) != 0) {
 | |
|                     throw new IllegalArgumentException("Attachment types must match the ones"
 | |
|                             + " defined in CallResponse");
 | |
|                 }
 | |
|                 mCallComposerAttachmentsToShow = callComposerAttachmentsToShow;
 | |
|                 return this;
 | |
|             }
 | |
| 
 | |
|             public CallResponse build() {
 | |
|                 return new CallResponse(
 | |
|                         mShouldDisallowCall,
 | |
|                         mShouldRejectCall,
 | |
|                         mShouldSilenceCall,
 | |
|                         mShouldSkipCallLog,
 | |
|                         mShouldSkipNotification,
 | |
|                         mShouldScreenCallViaAudioProcessing,
 | |
|                         mCallComposerAttachmentsToShow);
 | |
|             }
 | |
|        }
 | |
|     }
 | |
| 
 | |
|     public CallScreeningService() {
 | |
|     }
 | |
| 
 | |
|     @Override
 | |
|     public IBinder onBind(Intent intent) {
 | |
|         Log.v(this, "onBind");
 | |
|         return new CallScreeningBinder();
 | |
|     }
 | |
| 
 | |
|     @Override
 | |
|     public boolean onUnbind(Intent intent) {
 | |
|         Log.v(this, "onUnbind");
 | |
|         return false;
 | |
|     }
 | |
| 
 | |
|     /**
 | |
|      * Called when a new incoming or outgoing call is added.
 | |
|      * <p>
 | |
|      * A {@link CallScreeningService} must indicate whether an incoming call is allowed or not by
 | |
|      * calling
 | |
|      * {@link CallScreeningService#respondToCall(Call.Details, CallScreeningService.CallResponse)}.
 | |
|      * Your app can tell if a call is an incoming call by checking to see if
 | |
|      * {@link Call.Details#getCallDirection()} is {@link Call.Details#DIRECTION_INCOMING}.
 | |
|      * <p>
 | |
|      * <em>Note:</em> A {@link CallScreeningService} must respond to a call within 5 seconds.  After
 | |
|      * this time, the framework will unbind from the {@link CallScreeningService} and ignore its
 | |
|      * response.
 | |
|      * <p>
 | |
|      * <em>Note:</em> The {@link Call.Details} instance provided to a call screening service will
 | |
|      * only have the following properties set.  The rest of the {@link Call.Details} properties will
 | |
|      * be set to their default value or {@code null}.
 | |
|      * <ul>
 | |
|      *     <li>{@link Call.Details#getCallDirection()}</li>
 | |
|      *     <li>{@link Call.Details#getCallerNumberVerificationStatus()}</li>
 | |
|      *     <li>{@link Call.Details#getConnectTimeMillis()}</li>
 | |
|      *     <li>{@link Call.Details#getCreationTimeMillis()}</li>
 | |
|      *     <li>{@link Call.Details#getHandle()}</li>
 | |
|      * </ul>
 | |
|      * <p>
 | |
|      * Only calls where the {@link Call.Details#getHandle() handle} {@link Uri#getScheme() scheme}
 | |
|      * is {@link PhoneAccount#SCHEME_TEL} are passed for call
 | |
|      * screening.  Further, only calls which are not in the user's contacts are passed for
 | |
|      * screening, unless the {@link CallScreeningService} has been granted
 | |
|      * {@link Manifest.permission#READ_CONTACTS} permission by the user.  For outgoing calls, no
 | |
|      * post-dial digits are passed.
 | |
|      * <p>
 | |
|      * Calls with a {@link Call.Details#getHandlePresentation()} of
 | |
|      * {@link TelecomManager#PRESENTATION_RESTRICTED}, {@link TelecomManager#PRESENTATION_UNKNOWN},
 | |
|      * {@link TelecomManager#PRESENTATION_UNAVAILABLE} or
 | |
|      * {@link TelecomManager#PRESENTATION_PAYPHONE} presentation are not provided to the
 | |
|      * {@link CallScreeningService}.
 | |
|      *
 | |
|      * @param callDetails Information about a new call, see {@link Call.Details}.
 | |
|      */
 | |
|     public abstract void onScreenCall(@NonNull Call.Details callDetails);
 | |
| 
 | |
|     /**
 | |
|      * Responds to the given incoming call, either allowing it, silencing it or disallowing it.
 | |
|      * <p>
 | |
|      * The {@link CallScreeningService} calls this method to inform the system whether the call
 | |
|      * should be silently blocked or not. In the event that it should not be blocked, it may
 | |
|      * also be requested to ring silently.
 | |
|      * <p>
 | |
|      * Calls to this method are ignored unless the {@link Call.Details#getCallDirection()} is
 | |
|      * {@link Call.Details#DIRECTION_INCOMING}.
 | |
|      * <p>
 | |
|      * For incoming calls, a {@link CallScreeningService} MUST call this method within 5 seconds of
 | |
|      * {@link #onScreenCall(Call.Details)} being invoked by the platform.
 | |
|      * <p>
 | |
|      * Calls which are blocked/rejected will be logged to the system call log with a call type of
 | |
|      * {@link android.provider.CallLog.Calls#BLOCKED_TYPE} and
 | |
|      * {@link android.provider.CallLog.Calls#BLOCK_REASON_CALL_SCREENING_SERVICE} block reason.
 | |
|      *
 | |
|      * @param callDetails The call to allow.
 | |
|      *                    <p>
 | |
|      *                    Must be the same {@link Call.Details call} which was provided to the
 | |
|      *                    {@link CallScreeningService} via {@link #onScreenCall(Call.Details)}.
 | |
|      * @param response The {@link CallScreeningService.CallResponse} which contains information
 | |
|      * about how to respond to a call.
 | |
|      */
 | |
|     public final void respondToCall(@NonNull Call.Details callDetails,
 | |
|             @NonNull CallResponse response) {
 | |
|         try {
 | |
|             mCallScreeningAdapter.onScreeningResponse(
 | |
|                     callDetails.getTelecomCallId(),
 | |
|                     new ComponentName(getPackageName(), getClass().getName()),
 | |
|                     response.toParcelable());
 | |
|         } catch (RemoteException e) {
 | |
|             Log.e(this, e, "Got remote exception when returning response");
 | |
|         }
 | |
|     }
 | |
| }
 |