当我打开我的应用程序时，我一直得到这个黑屏，摆脱它的唯一方法是按下后退按钮，然后再次转到应用程序。我的朋友告诉我，它会陷入僵局！但我不认为因为当我检查logcat时它会显示以下日志消息。
查看
private boolean mGameIsRunning;
public void surfaceCreated(SurfaceHolder holder) {
// Your own start method.
start();
}
public void start() {
if (!mGameIsRunning) {
thread.initLevel();
thread.setRunning(true);
thread.start();
mGameIsRunning = true;
} else {
thread.onResume();
thread.initLevel();
thread.setRunning(true);
}
}
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;
thread.setRunning(false);
while (retry) {
try {
thread.join();
retry = false;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Log.d(TAG, "Thread was shut down cleanly");
}
发
private Object mPauseLock = new Object();
private boolean mPaused;
@Override
public void run() {
Canvas canvas;
Log.d(TAG, "Starting game loop");
while (running) {
canvas = null;
// try locking the canvas for exclusive pixel editing
// in the surface
try {
canvas = this.mSurfaceHolder.lockCanvas();
synchronized (mSurfaceHolder) {
mStartTime = System.currentTimeMillis();
mElapsedTime = System.currentTimeMillis() - mStartTime;
this.updateGame();
this.onDraw(canvas);
}
synchronized(mPauseLock){
while (mPaused) {
try {
mPauseLock.wait();
} catch (InterruptedException e) {
}
}
}
} finally {
// in case of an exception the surface is not left in
// an inconsistent state
if (canvas != null) {
mSurfaceHolder.unlockCanvasAndPost(canvas);
}
} // end finally
}
}
public void onPause() {
synchronized (mPauseLock) {
mPaused = true;
}
}
public void onResume() {
synchronized (mPauseLock) {
mPaused = false;
mPauseLock.notifyAll();
}
}
日志
07-08 17:24:41.735: DEBUG/Hitman(3221): View added
07-08 17:24:41.895: DEBUG/(3221): Enemies Spawed
07-08 17:24:41.934: DEBUG/(3221): Starting game loop
07-08 17:24:42.165: INFO/ActivityManager(66): Displayed activity com.android.hitmanassault/.Hitman: 1384 ms (total 1384 ms)
07-08 17:24:46.164: DEBUG/(3221): Enemies Spawed
07-08 17:24:48.914: INFO/ActivityManager(66): Start proc com.android.settings for broadcast com.android.settings/.widget.SettingsAppWidgetProvider: pid=3228 uid=1000 gids={3002, 3001, 3003}
07-08 17:24:48.914: INFO/ActivityManager(66): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME] flg=0x10200000 cmp=com.android.launcher/.Launcher }
07-08 17:24:48.924: DEBUG/PhoneWindow(3221): couldn't save which view has focus because the focused view com.android.hitmanassault.HitmanView@44d99528 has no id.
07-08 17:24:48.954: INFO/WindowManager(66): Setting rotation to 0, animFlags=0
07-08 17:24:49.014: INFO/ActivityManager(66): Config changed: { scale=1.0 imsi=310/260 loc=en_US touch=3 keys=2/1/2 nav=3/1 orien=1 layout=34}
07-08 17:24:49.275: DEBUG/(3221): Surface is being destroyed
07-08 17:24:49.285: DEBUG/(3221): Thread was shut down cleanly
07-08 17:24:49.694: DEBUG/ddm-heap(3228): Got feature list request
07-08 17:24:49.754: WARN/IInputConnectionWrapper(3221): showStatusIcon on inactive InputConnection
07-08 17:24:51.315: DEBUG/dalvikvm(66): GC freed 2325 objects / 114696 bytes in 122ms
07-08 17:24:58.234: INFO/ActivityManager(66): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.android.hitmanassault/.HitmanTitle }
07-08 17:24:58.284: INFO/WindowManager(66): Setting rotation to 1, animFlags=0
07-08 17:24:58.354: INFO/ActivityManager(66): Config changed: { scale=1.0 imsi=310/260 loc=en_US touch=3 keys=2/1/2 nav=3/1 orien=2 layout=34}
07-08 17:24:58.554: DEBUG/(3221): Enemies Spawed
07-08 17:24:58.945: WARN/IInputConnectionWrapper(144): showStatusIcon on inactive InputConnection
07-08 17:25:00.604: DEBUG/dalvikvm(66): GC freed 1403 objects / 71832 bytes in 103ms
活动类：
@Override
public boolean onCreateOptionsMenu(Menu menu){
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.game_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()){
case R.id.menu_restart:
startActivity(new Intent(this, Hitman.class));
return true;
case R.id.menu_scores:
startActivity(new Intent(this, HitmanScores.class));
return true;
case R.id.menu_help:
startActivity(new Intent(this, HitmanHelp.class));
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new CanvasSurfaceView(this));
Log.d(TAG, "View added");
}
答案 0 :(得分：1)
旋转显示器是否会使其刷新（在模拟器中：CTRL + F12）？如果是这样，那么你必须在你的活动中覆盖onResume（）并让它重新启动你设置的任何可能没有被调用的东西。可能你需要从活动onResume（）调用view.invalidate()？您不会显示活动中的代码，所以我不确定。
在我看到的代码中，您应该使用this.postInvalidate()（与invalidate()相同但是来自不同的主题）而不是this.onDraw(canvas)，并在其上调用this.onDraw()拥有UI线程，而不是你的线程。
答案 1 :(得分：1)
你在哪里初始化你的线程？尝试在surfaceCreated（）中执行此操作，而不是使用surfaceView consturctor（我认为你在这里做了..）
public void surfaceCreated(SurfaceHolder holder) {
// Restart draw thread
Thread.State state = thread.getState();
if(state == Thread.State.TERMINATED)
thread = new MyThread(getHolder(), getContext());
thread.setRunning(true);
thread.start();
}