public class SaveActivity extends Activity {
    /** Called when the activity is first created. */
    public Button btn;
    public ImageView img;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        img=(ImageView)findViewById(R.id.img);
        btn=(Button)findViewById(R.id.btn);
         onclick();
    }
    public void onclick(){
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                saveImage();
        }

            private void saveImage() {
                // TODO Auto-generated method stub
                int [] a= new int [16384];
                for(int i =0;i<16384;i++)
                    a[i] = -1601933;
                Bitmap bmp = Bitmap.createBitmap(a, 0,128, 128, 128,Bitmap.Config.RGB_565);
                    img.setImageBitmap(bmp); File filename; 
                    try { 
                        String path = Environment.getExternalStorageDirectory().toString(); 
             
                        new File(path + "/folder/subfolder").mkdirs(); 
                        filename = new File(path + "/folder/subfolder/image.jpg"); 
             
                        FileOutputStream out = new FileOutputStream(filename); 
             
                       [color=#FF0000]boolean m = bmp.compress(Bitmap.CompressFormat.JPEG, 90, out);[/color] 
                        out.flush(); 
                        out.close(); 
             
                        MediaStore.Images.Media.insertImage(getContentResolver(), 
                                filename.getAbsolutePath(), filename.getName(), 
                                filename.getName()); 
             
                        Toast.makeText(getApplicationContext(), 
                                "File is Saved in  " + filename, 1000).show(); 
                    } catch (Exception e) { 
                        e.printStackTrace(); 
                        System.out.println("s;dlfkjg");
                    } 
            }
    });
    }