90 lines
3.1 KiB
Markdown
90 lines
3.1 KiB
Markdown
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Android ElevationBasic Sample
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===================================
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This sample demonstrates ways to move a view in the z-axis using
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`setTranslationZ()`. This method was introduced in API Level 21 ('Lollipop').
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Introduction
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------------
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This sample uses two shapes, a circle and a square, and it demonstrates two
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alternative ways to move a view in the z-axis. The first shape, the circle,
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has a fixed elevation, which is defined in XML. The second view, the square,
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changes its elevation using [setTranslationZ()][1] when a user touches it:
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shape2.setOnTouchListener(new View.OnTouchListener() {
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@Override
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public boolean onTouch(View view, MotionEvent motionEvent) {
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int action = motionEvent.getActionMasked();
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/* Raise view on ACTION_DOWN and lower it on ACTION_UP. */
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switch (action) {
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case MotionEvent.ACTION_DOWN:
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Log.d(TAG, "ACTION_DOWN on view.");
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view.setTranslationZ(120);
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break;
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case MotionEvent.ACTION_UP:
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Log.d(TAG, "ACTION_UP on view.");
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view.setTranslationZ(0);
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break;
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default:
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return false;
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}
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return true;
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}
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});
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The elevation reverts back once the touch is removed.
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[1]: https://developer.android.com/training/material/shadows-clipping.html#Elevation
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Pre-requisites
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--------------
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- Android SDK 27
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- Android Build Tools v27.0.2
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- Android Support Repository
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Screenshots
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-------------
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<img src="screenshots/fixed.png" height="400" alt="Screenshot"/> <img src="screenshots/raised.png" height="400" alt="Screenshot"/>
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Getting Started
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---------------
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This sample uses the Gradle build system. To build this project, use the
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"gradlew build" command or use "Import Project" in Android Studio.
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Support
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-------
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- Google+ Community: https://plus.google.com/communities/105153134372062985968
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- Stack Overflow: http://stackoverflow.com/questions/tagged/android
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If you've found an error in this sample, please file an issue:
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https://github.com/googlesamples/android-ElevationBasic
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Patches are encouraged, and may be submitted by forking this project and
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submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
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License
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-------
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Copyright 2017 The Android Open Source Project, Inc.
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Licensed to the Apache Software Foundation (ASF) under one or more contributor
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license agreements. See the NOTICE file distributed with this work for
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additional information regarding copyright ownership. The ASF licenses this
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file to you under the Apache License, Version 2.0 (the "License"); you may not
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use this file except in compliance with the License. You may obtain a copy of
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the License at
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http://www.apache.org/licenses/LICENSE-2.0
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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, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations under
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the License.
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