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@Override
public void run() {
super.run();
final float timePerFrame = 1000/Options.MAX_FPS;
float timeDiff;
while(!isInterrupted() && isRunning) {
timeDiff = System.currentTimeMillis();
mController.refresh();
timeDiff = timePerFrame - (timeDiff - System.currentTimeMillis());
try {
Thread.sleep(Math.max(Math.round(timeDiff), 0));
} catch(InterruptedException e) {
// do nothing
e.printStackTrace();
}
}
Log.e("GameThread", "Thread dead.");
}
這是我的線程基本上在做什麼。我的繪圖線程突然停止的原因是什麼?
Options.MAX_FPS = 30;
要限制幀每秒,每個刷新之間有某種休眠時間。刷新方法如下所示:
public synchronized void refresh(){mrotation = Math.round((360 +((-1)* mAccelerometer [0] * 4.5f))%360); mObject.setRotation(mRotation);
// get canvas from surfaceview
if(mSurfaceHolder != null) {
// do all calculations.
if(Looper.myLooper() == Looper.getMainLooper()) {
log("on main thread!");
} else {
log("Not on main thread");
}
Canvas mCanvas = mSurfaceHolder.lockCanvas();
if (mCanvas != null) {
// shift x offset
mScreenWidth = mCanvas.getWidth();
mScreenHeight = mCanvas.getHeight();
// draw black background, clear everything.
mCanvas.drawRect(new Rect(0,0,mScreenWidth, mScreenHeight), mBlackPaint);
// shift & draw all viewobjects if still visible
for(ViewObject view: mViewObjectList.toArray(new ViewObject[mViewObjectList.size()])) {
view.shiftX(-1 * Options.Gameplay.Environment.MOVING_SPEED);
if(view.getX() + view.getWidth() < 0) {
mViewObjectList.remove(view);
}
if(view.getCurrentBitmap() != null)
mCanvas.drawBitmap(view.getCurrentBitmap(), new Rect(0,0,view.getCurrentBitmap().getWidth(), view.getCurrentBitmap().getHeight()), new Rect(view.getX(), view.getY(), view.getX()+ view.getWidth(), view.getY()+view.getHeight()), new Paint());
view.nextFrame();
}
// draw object
final Bitmap sBitmap = mObject.getCurrentBitmap();
mObject.nextFrame();
if(sBitmap != null) {
mCanvas.drawBitmap(sBitmap, new Rect(0, 0, sBitmap.getWidth(), sBitmap.getHeight()), new Rect(mObject.getX(), mObject.getY(), sBitmap.getWidth(), sBitmap.getHeight()), new Paint());
} else log("bitmap = null!");
}
mSurfaceHolder.unlockCanvasAndPost(mCanvas);
}
}
線程繼續運行一段時間後,背景元素都被吸收(即使我的旋轉不工作相當尚未,但這是另一個故事。),背景「似乎」移動(像側),但在某個隨機時間點,沒有任何ADB LogCat消息(不限於應用程序,而是整個LogCat輸出) - 線程停止。沒有更多的繪圖。沒有。我沒有調用中斷或設置isRunning爲false,因爲「Thread dead」。消息不會寫入LogCat中。 我不知道發生了什麼。 感謝您的幫助。