Android java.lang.OutOfMemoryError (แก้ปัญหาเรื่อง OutOfMemoryError ในการแสดงรูปภาพ)

	 public static Bitmap decodeFile(File file, int iWidth, int iHeight){
		 try {
		     //Decode image size
		     BitmapFactory.Options o = new BitmapFactory.Options();
		     o.inJustDecodeBounds = true;
		     BitmapFactory.decodeStream(new FileInputStream(file),null,o);

		     //The new size we want to scale to
		     final int REQUIRED_WIDTH = iWidth;
		     final int REQUIRED_HIGHT = iHeight;
		     //Find the correct scale value. It should be the power of 2.
		     int scale=1;
		     while(o.outWidth/scale/2>=REQUIRED_WIDTH && o.outHeight/scale/2>=REQUIRED_HIGHT)
		         scale*=2;

		     //Decode with inSampleSize
		     BitmapFactory.Options o2 = new BitmapFactory.Options();
		     o2.inSampleSize=scale;
		     return BitmapFactory.decodeStream(new FileInputStream(file), null, o2);
		 } catch (FileNotFoundException e) {}
		 return null;
	}

        Bitmap bm = decodeFile(new File("/sdcard/image.jpg"),200,200);
        imgView.setImageBitmap(bm);

	 public static void decodeFile(ImageView imgView, String filePath){
		int targetW = imgView.getWidth();
		int targetH = imgView.getHeight();
		
		// Get the dimensions of the bitmap
		BitmapFactory.Options bmOptions = new BitmapFactory.Options();
		bmOptions.inJustDecodeBounds = true;
		BitmapFactory.decodeFile(filePath, bmOptions);
		int photoW = bmOptions.outWidth;
		int photoH = bmOptions.outHeight;

		// Determine how much to scale down the image
		int scaleFactor = Math.min(photoW/targetW, photoH/targetH);

		// Decode the image file into a Bitmap sized to fill the View
		bmOptions.inJustDecodeBounds = false;
		bmOptions.inSampleSize = scaleFactor;
		bmOptions.inPurgeable = true;

		Bitmap bitmap = BitmapFactory.decodeFile(filePath, bmOptions);
		imgView.setImageBitmap(bitmap);
	}

	    ImageView imgView = (ImageView) findViewById(R.id.imgView);
	    decodeFile(imgView,"/sdcard/image.jpg");