android view create snapshot and savebitmap

private  Bitmap createScreenshot(int width, int height) {
    // We render to a bitmap 2x the desired size so that we can then
    // re-scale it with filtering since canvas.scale doesn't filter
    // This helps reduce aliasing at the cost of being slightly blurry
    final int filter_scale = 2;
    Picture thumbnail = capturePicture();
    if (thumbnail == null) {
        return null;
    }
    //width = getWidth();
    //height = getHeight();
    width *= filter_scale;
    height *= filter_scale;
    Bitmap bm = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
    Canvas canvas = new Canvas(bm);
    // May need to tweak these values to determine what is the
    // best scale factor
    int thumbnailWidth = thumbnail.getWidth();
    int thumbnailHeight = thumbnail.getHeight();
    float scaleFactor = 1.0f;
    if (thumbnailWidth > 0 && thumbnailHeight > 0) {
        scaleFactor = (float) width / (float)thumbnailWidth;
    } else {
        return null;
    }

    float scaleFactorY = (float) height / (float)thumbnailHeight;
    if (scaleFactorY > scaleFactor) {
        // The picture is narrower than the requested AR
        // Center the thumnail and crop the sides
        scaleFactor = scaleFactorY;
        float wx = (thumbnailWidth * scaleFactor) - width;
        canvas.translate((int) -(wx / 2), 0);
    }

    canvas.scale(scaleFactor, scaleFactor);

    thumbnail.draw(canvas);
    Bitmap ret = Bitmap.createScaledBitmap(bm, width / filter_scale,
            height / filter_scale, true);
    bm.recycle();
    return ret;
}

 

 

    public void saveBitmap(Bitmap bm, String filename){
        //String filename = "/mnt/sdcard/a.png";
        if (null == bm || bm.getWidth() == 0 || bm.getHeight() == 0){
            return;
        }
        File temp = new File(filename);
        FileOutputStream fout = null;
        try{
            temp.createNewFile();
            fout = new FileOutputStream(temp);
        }catch (IOException e){
            e.printStackTrace();
        }
        bm.compress(Bitmap.CompressFormat.PNG, 100, fout);
        try {
            fout.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
        try {
            fout.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        if (!bm.isRecycled()){
            bm.recycle();
        }
    }

 

 

 

     Bitmap getViewBitmap(View v){
        Bitmap drawingCache = Bitmap.createBitmap(v.getWidth(),
            v.getHeight(), Bitmap.Config.RGB_565);
        Canvas cvs = new Canvas();
        cvs.setBitmap(drawingCache);
        v.draw(cvs);
        return drawingCache;
    }