Question

This is my first strange result that I never expected. This is may be lack of skill in that area.

Well I had a button, through which I need to select an image from the phone gallery (probably from sdcard). I used implicit intent to call the phone gallery and got the absolute image path with startActivityForResult(). Immediately am calling another activity putting that path with startActivity().

According to my scenario I wrote the following code in the onClick() of button.

@Override
public void onClick(View v) {
        upLoadPhoto();
}

protected void upLoadPhoto() {

    Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
    intent.setType("image/*");
    intent.putExtra("return-data", true);
    System.out.println("select image");
    startActivityForResult(intent, 1);
    startActivity(next);
    finish();
}

    public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
            if(requestCode == 1 && data != null && data.getData() != null){
                Uri uri = data.getData();
                if (uri != null) {
                    Cursor cursor = getContentResolver().query(uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
                    cursor.moveToFirst();
                    final String imageFilePath = cursor.getString(0);
                    System.out.println("Background : "+imageFilePath);
                    next.putExtra("backImagePath", imageFilePath);
                    cursor.close();
            super.onActivityResult(requestCode, resultCode, data);
        }
    }
}

When I click the button, startActivity(next) is called first, then startActivityForResult(intent,1) is called. As am trying to get image path in the second activity through bundle object, am getting NullPointerException because of startActivity(next) is being called first.

I dropped my jaws when I saw my debugging point are not as expected. Hope I get exact reason to this issue.

Thanks
Aswin

Answer 1

What about moving the call to startActivity(next); into onActivityResult()… this way you will navigate to the other activity after getting the path

protected void upLoadPhoto() {

Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
intent.setType("image/*");
intent.putExtra("return-data", true);
System.out.println("select image");
startActivityForResult(intent, 1);

finish();

}

public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
        if(requestCode == 1 && data != null && data.getData() != null){
            Uri uri = data.getData();
            if (uri != null) {
                Cursor cursor = getContentResolver().query(uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
                cursor.moveToFirst();
                final String imageFilePath = cursor.getString(0);
                System.out.println("Background : "+imageFilePath);
                next.putExtra("backImagePath", imageFilePath);
                cursor.close();

            startActivity(next);

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

}