How to keep an image in an Android activity during an orientation change?

Bitmap image;

public void onCreat(..){
    if (savedInstanceState != null) {
        image = (Bitmap) savedInstanceState.getParcelableExtra("BitmapImage");; 
    } else { 
        image = yourBitmapImage;
    } 
}

@Override public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putExtra("BitmapImage", bitmap);
}

I think it costs too much if you save a Bitmap in onSaveInstanceState,as onSaveInstanceState will be called before onStop every time,and Bitmap is a big thing.

I think is better to save a URI in onSaveInstanceState。

Uri mUri;
ImageView mImageView;

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  ...
  if (savedInstanceState != null){
    mUri = savedInstanceState.getParcelable("uri");
    mImageView.setImageURI(mUri);
  }
}


protected void onActivityResult( int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK){
        Uri targetUri = data.getData();
        ...
        mUri = targetUri;
    }   
}
public void onSaveInstanceState(Bundle outState) {
        if (mURI !=null) {
            outState.putParcelable("uri", mUri);
        }
    }

We should never use the above way to save our heavy objects such as image or bitmap it is always advisable to use the fragments. Have a look at this an easy implementation of how to retain the fragment https://developer.android.com/guide/topics/resources/runtime-changes.html#RetainingAnObject