将画布图形保存到SD卡

Question

I m currently working on canvas drawing in which i hv a canvas with white colored background ( with canvas.drawColor(Color.WHITE); ) and a sketched image of cartoons comics that allows to paint with some colors. The problem is that when i go to save the canvas image only a black screen with color done get saved neither the canvas white background nor the sketched image is appeared.. I m using this code for saving canvas

public void saveAsJpg (File f)
    {
        String fname = f.getAbsolutePath ();
        FileOutputStream fos = null;
        try 
        {
            fos = new FileOutputStream (f);
            mBitmap.compress (CompressFormat.JPEG, 95, fos);
            Toast.makeText (getApplicationContext(), "Saved " + fname, Toast.LENGTH_LONG).show ();
        }
        catch (Throwable ex) 
        {
            Toast.makeText (getApplicationContext(), "Error: " + ex.getMessage (), Toast.LENGTH_LONG).show ();
            ex.printStackTrace ();
        }
    }

Please help,,,, Thnx in advance

Answer 1

Have you tried this? Write in your manifest file this permittion. . .

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Answer 2

I got my drawing get saved. The changes i need to made in code is to create a bitmap along-with the canvas by command mCanvas = new Canvas( mBitmap ); , which turn my canvas background as the image background..
Previously i had only started to painting the canvas which has black color background by default.