我有一个非常简单的 SurfaceView 游戏，有时游戏会在几秒钟内不响应触摸事件，然后它会立即响应所有这些触摸事件。我已经在 Galaxy S3 和 Nexus 4 上测试了我的游戏，它运行良好，似乎这个问题只发生在 Galaxy S5 上。
主要活动：
public class DroidzActivity extends Activity { /** Called when the activity is first created. */ private static final String TAG = DroidzActivity.class.getSimpleName(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // requesting to turn the title OFF requestWindowFeature(Window.FEATURE_NO_TITLE); // making it full screen getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); // set our MainGamePanel as the View setContentView(new MainGamePanel(this)); Log.d(TAG, "View added"); } @Override protected void onDestroy() { Log.d(TAG, "Destroying..."); super.onDestroy(); } @Override protected void onStop() { Log.d(TAG, "Stopping..."); super.onStop(); } }- 主游戏面板
公共类 MainGamePanel 扩展 SurfaceView 实现 SurfaceHolder.Callback {
private static final String TAG = MainGamePanel.class.getSimpleName();
private MainThread thread;
public MainGamePanel(Context context) {
super(context);
// adding the callback (this) to the surface holder to intercept events
getHolder().addCallback(this);
// create the game loop thread
thread = new MainThread(getHolder(), this);
// make the GamePanel focusable so it can handle events
setFocusable(true);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// at this point the surface is created and
// we can safely start the game loop
thread.setRunning(true);
thread.start();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.d(TAG, "Surface is being destroyed");
// tell the thread to shut down and wait for it to finish
// this is a clean shutdown
boolean retry = true;
while (retry) {
try {
thread.setRunning(false);
thread.join();
retry = false;
} catch (InterruptedException e) {
// try again shutting down the thread
}
}
Log.d(TAG, "Thread was shut down cleanly");
}
public void render(Canvas canvas){
if(canvas!=null)
canvas.drawColor(colorList[colorIndex]);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
colorIndex++;
colorIndex = colorIndex % colorList.length;
}
return super.onTouchEvent(event);
}
int [] colorList = {Color.RED, Color.GREEN, Color.BLUE, Color.GRAY};
int colorIndex = 0;
}
主线程
公共类 MainThread 扩展 Thread {
private static final String TAG = MainThread.class.getSimpleName(); // Surface holder that can access the physical surface private SurfaceHolder surfaceHolder; // The actual view that handles inputs // and draws to the surface private MainGamePanel gamePanel; // flag to hold game state private boolean running; public void setRunning(boolean running) { this.running = running; } public MainThread(SurfaceHolder surfaceHolder, MainGamePanel gamePanel) { super(); this.surfaceHolder = surfaceHolder; this.gamePanel = gamePanel; } // desired fps private final static int MAX_FPS = 50; // maximum number of frames to be skipped private final static int MAX_FRAME_SKIPS = 5; // the frame period private final static int FRAME_PERIOD = 1000 / MAX_FPS; @Override public void run() { Canvas canvas; Log.d(TAG, "Starting game loop"); long beginTime; // the time when the cycle begun long timeDiff; // the time it took for the cycle to execute int sleepTime; // ms to sleep (<0 if we're behind) int framesSkipped; // number of frames being skipped sleepTime = 0; while (running) { canvas = null; // try locking the canvas for exclusive pixel editing // in the surface try { canvas = this.surfaceHolder.lockCanvas(); synchronized (surfaceHolder) { beginTime = System.currentTimeMillis(); framesSkipped = 0; // resetting the frames skipped // update game state // this.gamePanel.update(); // render state to the screen // draws the canvas on the panel this.gamePanel.render(canvas); // calculate how long did the cycle take timeDiff = System.currentTimeMillis() - beginTime; // calculate sleep time sleepTime = (int)(FRAME_PERIOD - timeDiff); if (sleepTime > 0) { // if sleepTime > 0 we're OK try { // send the thread to sleep for a short period // very useful for battery saving Thread.sleep(sleepTime); } catch (InterruptedException e) {} } while (sleepTime < 0 && framesSkipped < MAX_FRAME_SKIPS) { // we need to catch up // update without rendering // this.gamePanel.update(); // add frame period to check if in next frame sleepTime += FRAME_PERIOD; framesSkipped++; } } } finally { // in case of an exception the surface is not left in // an inconsistent state if (canvas != null) { surfaceHolder.unlockCanvasAndPost(canvas); } } // end finally } }}
这是该应用程序的最简单版本，我已经尝试过，并且能够再次重现相同的问题。在 S5 上加载有时也需要 5-10 秒，而在 Nexus 4 和 S3 上加载不到 1 秒。