Android位图/字节数组内存泄漏

Question

I am having problems with a memory leak in my android app. Based on my hprof analysis it appears to be caused by a byte array that comes from a Bitmap in a SurfaceView class.

Here is the MAT analysis of one of several arrays:

and the code of the offending class:

public class AndroidFastRenderView extends SurfaceView implements Runnable {

    AndroidGame game;
    Bitmap framebuffer;
    Thread renderThread = null;
    SurfaceHolder holder;
    volatile boolean running = false;

    public AndroidFastRenderView(AndroidGame game, Bitmap framebuffer) {
        super(game);
        this.game = game;
        this.framebuffer = framebuffer;
        this.holder = getHolder();
        this.holder.setFormat(PixelFormat.RGBA_8888);
        setSystemUiVisibility(
                SYSTEM_UI_FLAG_IMMERSIVE_STICKY | SYSTEM_UI_FLAG_FULLSCREEN | SYSTEM_UI_FLAG_HIDE_NAVIGATION);

    }

    public void resume() {
        setSystemUiVisibility(
                SYSTEM_UI_FLAG_IMMERSIVE_STICKY | SYSTEM_UI_FLAG_FULLSCREEN | SYSTEM_UI_FLAG_HIDE_NAVIGATION);
        running = true;
        renderThread = new Thread(this);
        renderThread.start();

    }

    public void run() {
        Rect dstRect = new Rect();
        long startTime = System.nanoTime();
        while (running) {
            if (!holder.getSurface().isValid())
                continue;
            float deltaTime = (System.nanoTime() - startTime) / 10000000.000f;
            startTime = System.nanoTime();
            game.getCurrentScreen().update(deltaTime);
            game.getCurrentScreen().paint(deltaTime);
            Canvas canvas = holder.lockCanvas();
            canvas.getClipBounds(dstRect);
            canvas.drawBitmap(framebuffer, null, dstRect, null);
            holder.unlockCanvasAndPost(canvas);

        }
    }

    public void pause() {
        running = false;
        while (true) {
            try {
                renderThread.join();
                break;
            } catch (InterruptedException e) {
            }
        }
    }

    public void release() {
        getHolder().getSurface().release();
        framebuffer.recycle();
    }
}

release() is called in my Activity's onDestroy() .

frameBuffer is created with the line:

Bitmap frameBuffer = Bitmap.createBitmap(frameBufferWidth, frameBufferHeight, ARGB_8888);

in my Activity.

Answer 1

Make sure your Thread "renderThread" is stopped. If it is still active, it holds a reference to the "AndroidFastRenderView" object so it can't free the memory...