saving images from drawables to sd card

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I need help in saving images from drawables to sd card.when I click on save button it only saves drawable a1 to SD card from image view. but I want to save the image which is currently previewed not drawable a1. here is my main activity.`public class MainActivity extends Activity {

private static final List<Integer> backgrounds = new ArrayList<Integer>();
private static final int TOTAL_IMAGES;
static {
backgrounds.add(R.drawable.a1);
backgrounds.add(R.drawable.a2);
backgrounds.add(R.drawable.a3);
backgrounds.add(R.drawable.a4);
backgrounds.add(R.drawable.a5);
backgrounds.add(R.drawable.a6);
backgrounds.add(R.drawable.a7);
backgrounds.add(R.drawable.a8);


    TOTAL_IMAGES = (backgrounds.size() - 1);
}

private int currentPosition = 0;
private ImageView backgroundPreview;
 Bitmap bitmap;
 OutputStream output;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    backgroundPreview = (ImageView) findViewById(R.id.backgroundPreview);
    // Set the default image to be shown to start with
    changePreviewImage(currentPosition);

}


public void gotoPreviousImage(View v) {
    int positionToMoveTo = currentPosition;
    positionToMoveTo--;
    if(positionToMoveTo < 0){
        positionToMoveTo = TOTAL_IMAGES;
    }
    changePreviewImage(positionToMoveTo);
}

public void save(View v) {
    bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.a1);
    File filepath = Environment.getExternalStorageDirectory();
    File dir = new File(filepath.getAbsolutePath()
    + "/folder/folder/");
    dir.mkdirs();
    File file = new File(dir, "Image1.png");
    Toast.makeText(MainActivity.this, "Image Saved to SD Card",
    Toast.LENGTH_SHORT).show();
    try {
    output = new FileOutputStream(file);
    // Compress into png format image from 0% - 100%
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, output);
    output.flush();
    output.close();
    }
    catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
}

public void gotoNextImage(View v) {
    int positionToMoveTo = currentPosition;
    positionToMoveTo++;
    if(currentPosition == TOTAL_IMAGES){
        positionToMoveTo = 0;
    } 

    changePreviewImage(positionToMoveTo);
}

public void changePreviewImage(int pos) {
    currentPosition = pos;
    backgroundPreview.setImageResource(backgrounds.get(pos));
    Log.d("Main", "Current position: "+pos);

}       

};`

asked 39 secs ago

Faisal Khan

1

saving images from drawables to sd card