view createsnapshot 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;
    }