Android屏幕截图处理程序

Question

我已经在活动中创建了处理程序。这个Hanlder负责在10秒后拍摄屏幕截图。在运行方法中，我使用了虽然（标志==true）和屏幕捕获util标志==false，但这卡住了我的活动。我不能工作。它把屏幕拍摄一遍又一遍的相同的图像，因为动作被卡住了。我如何可以工作与我的屏幕和我正在做的处理程序采取屏幕截图后10秒？而循环卡住了我的应用程序。

它可以拍照，但我无法进行我的活动。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);
    flag = true;


    Handler handler = new Handler();
    handler.postDelayed(new Runnable() {

        @Override
        public void run() {

            while (flag == true) {
                String SCREENSHOTS_LOCATIONS = Environment
                        .getExternalStorageDirectory().toString() + "/re/";
                // Get root view
                View view = getWindow().getDecorView().getRootView();
                // Create the bitmap to use to draw the screenshot
                final Bitmap bitmap = Bitmap.createBitmap(view.getWidth(),
                        view.getHeight(), Bitmap.Config.ARGB_8888);
                final Canvas canvas = new Canvas(bitmap);

                // Get current theme to know which background to use
                final Theme theme = getTheme();
                final TypedArray ta = theme
                        .obtainStyledAttributes(new int[] { android.R.attr.windowBackground });
                final int res = ta.getResourceId(0, 0);
                final Drawable background = getResources().getDrawable(res);

                // Draw background
                background.draw(canvas);

                // Draw views
                view.draw(canvas);
                FileOutputStream fos = null;

                try {
                    final File sddir = new File(SCREENSHOTS_LOCATIONS);
                    if (!sddir.exists()) {
                        sddir.mkdirs();
                    }

                    fos = new FileOutputStream(SCREENSHOTS_LOCATIONS + x
                            + ".jpg");
                    x++;
                    if (fos != null) {
                        if (!bitmap.compress(Bitmap.CompressFormat.JPEG,
                                90, fos)) {
                            Log.d("ScreenShot", "Compress/Write failed");
                        }
                        fos.flush();
                        fos.close();
                    }
                } catch (Exception e) {

                }
            }
        }

    }, 1000);

}

Answer 1

也许尝试使用AsyncWork或其他线程。postDelayed（）函数附加到主UI线程并锁定应用程序，直到run（）完成（这永远不会发生，因为标志永远不会等于false，所以而循环变得无限？）。

下面是一个使用ScheduledThreadPoolExecutor的示例：

private ScheduledThreadPoolExecutor exec = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);
    flag = true;

    exec = new ScheduledThreadPoolExecutor(5);
    long interval = (long) 10; // 10 seconds for you
    exec.scheduleAtFixedRate(new savePicTask(), 0, interval, TimeUnit.SECONDS);

}

class savePicTask implements Runnable {
    @Override
    public void run() {
        while (flag == true) {
            String SCREENSHOTS_LOCATIONS = Environment
                    .getExternalStorageDirectory().toString() + "/re/";
            // Get root view
            View view = getWindow().getDecorView().getRootView();
            // Create the bitmap to use to draw the screenshot
            final Bitmap bitmap = Bitmap.createBitmap(view.getWidth(),
                    view.getHeight(), Bitmap.Config.ARGB_8888);
            final Canvas canvas = new Canvas(bitmap);

            // Get current theme to know which background to use
            final Theme theme = getTheme();
            final TypedArray ta = theme
                    .obtainStyledAttributes(new int[] { android.R.attr.windowBackground });
            final int res = ta.getResourceId(0, 0);
            final Drawable background = getResources().getDrawable(res);

            // Draw background
            background.draw(canvas);

            // Draw views
            view.draw(canvas);
            FileOutputStream fos = null;

            try {
                final File sddir = new File(SCREENSHOTS_LOCATIONS);
                if (!sddir.exists()) {
                    sddir.mkdirs();
                }

                fos = new FileOutputStream(SCREENSHOTS_LOCATIONS + x
                        + ".jpg");
                x++;
                if (fos != null) {
                    if (!bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fos)) {
                        Log.d("ScreenShot", "Compress/Write failed");
                    }
                    fos.flush();
                    fos.close();
                }
            } catch (Exception e) {

            }
        }
    }       
}

编辑1：这个代码对我有效，除了我使用

numberOfSeconds = 0.5;
ScheduledThreadPoolExecutor exec = new ScheduledThreadPoolExecutor(5);
long interval = (long) (1000* numberOfSeconds); // numberOfSeconds = 10 for you
exec.scheduleAtFixedRate(new savePicTask(), 0, interval, TimeUnit.MILLISECONDS);

我没有截图，而是用相机拍照。所以我不知道为什么它不适合你。