/* * Copyright 2014 Google Inc. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.grafika; import android.os.Bundle; import android.os.Handler; import android.os.Looper; import android.os.Message; import android.app.Activity; import android.util.Log; import android.view.Choreographer; /** * Trivial activity used to test Choreographer behavior. */ public class ChorTestActivity extends Activity { private static final String TAG = "chor-test"; ChorRenderThread mRenderThread; @Override protected void onCreate(Bundle savedInstanceState) { Log.d(TAG, "onCreate"); super.onCreate(savedInstanceState); setContentView(R.layout.activity_chor_test); mRenderThread = new ChorRenderThread(); mRenderThread.start(); } @Override protected void onPause() { Log.d(TAG, "onPause"); super.onPause(); // if we get here too quickly, the handler might still be null; not dealing with that Handler handler = mRenderThread.getHandler(); handler.sendEmptyMessage(0); mRenderThread = null; } private static class ChorRenderThread extends Thread implements Choreographer.FrameCallback { private volatile Handler mHandler; @Override public void run() { setName("ChorRenderThread"); Looper.prepare(); mHandler = new Handler() { public void handleMessage(Message msg) { Log.d(TAG, "got message, quitting"); Looper.myLooper().quit(); } }; Choreographer.getInstance().postFrameCallback(this); Looper.loop(); Log.d(TAG, "looper quit"); Choreographer.getInstance().removeFrameCallback(this); } public Handler getHandler() { return mHandler; } @Override public void doFrame(long frameTimeNanos) { Log.d(TAG, "doFrame " + frameTimeNanos); Choreographer.getInstance().postFrameCallback(this); } } }