我应该警告你，我是 android 开发的新手。
问题：我的应用程序启动后，它有黑屏，几秒钟后，它开始绘制我需要的东西。我检查了绘图线程已经开始，并且已经绘制了好几次内容，但是屏幕仍然是黑色的:(
我错过了什么？
这是我的代码：
活动
public class MainActivity extends Activity {
protected SurfaceView surface;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
surface = new GameSurfaceView(this);
setContentView(surface);
}
}
表面视图
public class GameSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
protected DrawThread drawThread;
public GameSurfaceView(Context context) {
super(context);
getHolder().addCallback(this);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
drawThread = new DrawThread(getHolder());
drawThread.start();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
drawThread.interrupt();
}
}
拉丝
public class DrawThread extends Thread {
public static final long FPS = 30;
protected SurfaceHolder surfaceHolder;
public DrawThread(SurfaceHolder surfaceHolder) {
super();
this.surfaceHolder = surfaceHolder;
}
@Override
public void run() {
while (!isInterrupted()) {
Canvas canvas = null;
try {
long renderStartedAt = SystemClock.elapsedRealtime();
canvas = surfaceHolder.lockCanvas();
if (canvas != null) {
canvas.drawColor(Color.CYAN);
// TODO DRAW
}
long duration = (1000 - (SystemClock.elapsedRealtime() - renderStartedAt) * FPS) / FPS;
if (duration > 0) {
sleep(duration);
}
} catch (InterruptedException e) {
interrupt();
} finally {
if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
}
}