Android the getDrawingCache() not contain actual values from TextView/TextClock

Question

I would like to get two bitmaps of screen. Problem is, TextView or TextClock contains values from first call of getDrawingCache(). Values for TextView or TextClock are not refreshed in new Bitmap after second call of getDrawingCache().

Work on Nexus 5 (second bitmap contains correct time from TextClock).
On many other devices not work. E.g.: Huawei Honor 4C.

minSdkVersion 21
targetSdkVersion 25
compileSdkVersion 25

TextClock automatically changes value. Not working even though i call setText() method on TextView.
Where is problem?

Test:
Create simple layout with: TextClock and run this code in UI Thread:

new Handler().postDelayed(new Runnable() {
    @Override
    public void run() {
        Log.i("TAG", Thread.currentThread().getName());
        try {
            Bitmap bitmapScreen = getBitmapOfScreen();
            //File f = new File("/storage/sdcard1", "tmp.jpg");   //Huawei
            File f = new File("/storage/emulated/0", "tmp.jpg");  //Nexus 5
            FileOutputStream fis = new FileOutputStream(f);
            bitmapScreen.compress(Bitmap.CompressFormat.JPEG, 100, fis);
            fis.flush();
            fis.close();
            bitmapScreen.recycle();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}, 5000);

new Handler().postDelayed(new Runnable() {
    @Override
    public void run() {
        Log.i("TAG", Thread.currentThread().getName());
        try {
            Bitmap bitmapScreen = getBitmapOfScreen();
            //File f = new File("/storage/sdcard1", "tmp2.jpg");    //Huawei
            File f = new File("/storage/emulated/0", "tmp2.jpg");  //Nexus 5
            FileOutputStream fis = new FileOutputStream(f);
            bitmapScreen.compress(Bitmap.CompressFormat.JPEG, 100, fis);
            fis.flush();
            fis.close();
            bitmapScreen.recycle();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}, 10000);

/** Must be called in UI thread.*/
public Bitmap getBitmapOfScreen() throws Exception {

    final View v1 = getWindow().getDecorView().getRootView();
    v1.destroyDrawingCache();
    v1.setDrawingCacheEnabled(true);

    v1.buildDrawingCache();
    Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
    bitmap.setHasAlpha(true);           //important for PNG
    v1.setDrawingCacheEnabled(false);
    return bitmap;
}

Answer 1

Solved.

Missing called invalidate() on view. For now, when i call invalidate() on TextClock before getBitmapOfScreen() call, value is correct in bitmap.