73 lines
2.4 KiB
Java
73 lines
2.4 KiB
Java
/*
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* Copyright (C) 2017 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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package com.android.dialer.constants;
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import android.content.Context;
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import android.support.annotation.NonNull;
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import com.android.dialer.common.Assert;
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import com.android.dialer.proguard.UsedByReflection;
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/**
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* Utility to access constants that are different across build variants (Google Dialer, AOSP,
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* etc...). This functionality depends on a an implementation being present in the app that has the
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* same package and the class name ending in "Impl". For example,
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* com.android.dialer.constants.ConstantsImpl. This class is found by the module using reflection.
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*/
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@UsedByReflection(value = "Constants.java")
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public abstract class Constants {
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private static Constants instance;
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private static boolean didInitializeInstance;
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@NonNull
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public static synchronized Constants get() {
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if (!didInitializeInstance) {
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didInitializeInstance = true;
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try {
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Class<?> clazz = Class.forName(Constants.class.getName() + "Impl");
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instance = (Constants) clazz.getConstructor().newInstance();
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} catch (ReflectiveOperationException e) {
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Assert.fail(
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"Unable to create an instance of ConstantsImpl. To fix this error include one of the "
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+ "constants modules (googledialer, aosp etc...) in your target.");
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}
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}
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return instance;
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}
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@NonNull
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public abstract String getFilteredNumberProviderAuthority();
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@NonNull
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public abstract String getFileProviderAuthority();
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@NonNull
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public abstract String getAnnotatedCallLogProviderAuthority();
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@NonNull
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public abstract String getPhoneLookupHistoryProviderAuthority();
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@NonNull
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public abstract String getPreferredSimFallbackProviderAuthority();
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public abstract String getUserAgent(Context context);
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@NonNull
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public abstract String getSettingsActivity();
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protected Constants() {}
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}
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