Nullpointerexcepiton on cursor while selecting photo from gallery on dialog fragment

Question

I'm trying to select photo from gallery through `DialogFragment`. But I'm getting `nullpointerexception` while initializing `cursor`. Any ideas why getting this error? Below is my code : ``` if (resultCode == Activity.RESULT_OK) { Uri selectedImage = imageReturnedIntent.getData(); String[] filePathColumn = {MediaStore.Images.Media.DATA}; // Nullpointerexcepiton on this line Cursor cursor = getActivity().getContentResolver().query(selectedImage, filePathColumn, null, null, null); cursor.moveToFirst(); int columnIndex = cursor.getColumnIndex(filePathColumn[0]); cursor.close(); } ``` Here is my logcat error : ``` 03-24 12:34:37.645: E/AndroidRuntime(21479): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=65538, result=-1, data=Intent { dat=content://media/external/images/media/3890 flg=0x1 }} to activity {com.example/com.example.MainActivity}: java.lang.NullPointerException 03-24 12:34:37.645: E/AndroidRuntime(21479): at android.app.ActivityThread.deliv…

Accepted Answer

How do you start your Activity and from where? If you pass your result trough your MainActivity, you can try to make a new function in your DialogFragment like this:

```
public void onMyActivityResult(Context main, int resultCode... an so on){

main.getContentResolver.......

}
```

Edit: i have done it in this way:

Get the Activity in onCreate:

```
@Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mActivity = (MainActivity) this.getActivity();
    }
```

then:

```
     @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
       if (requestCode == REQUEST_GALLERY && resultCode == Activity.RESULT_OK) {
           ...

Uri selectedImage = data.getData();
            String path = getRealPathFromURI(selectedImage);
           ...
            reloadImages();

}
        super.onActivityResult(requestCode, resultCode, data);
        }
```

and:

```
 private String getRealPathFromURI(Uri contentURI) {
    Cursor cursor = mActivity.getContentResolver().query(contentURI, null, null, null, null);
    if (cursor == null) { // Source is Dropbox or other similar local file
                  // path
        return contentURI.getPath();
    } else {
        cursor.moveToFirst();
        int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
        String path = cursor.getString(idx);
        cursor.close();
        return path;
    }
    }
```

Nullpointerexcepiton on cursor while selecting photo from gallery on dialog fragment

Solution

Problem