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Android Build a Self-Destructing Message Android App Retrieving and Viewing Messages Retrieving Messages

Challenge Task 3 out of 3 - Retrieving and Viewing Messages

My code:

import android.app.Activity;
import android.os.Bundle;
import com.parse.ParseQuery;
import com.parse.ParseObject;
import com.parse.FindCallback;

public class MainActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    /* Add code below! */
  ParseQuery query  = new ParseQuery("DoctorWhoEpisodes");
  query.whereEqualTo("writer","Neil Gaiman");
  query.findInBackground(new FindCallback<String>(){});

}
}

My errors:
Note: ./MainActivity.java uses unchecked or unsafe operations.

Note: Recompile with -Xlint:unchecked for details.

Were you able to find what was wrong?

EDIT: Task 3 of 3 allows the FindCallback to have an empty body.

1 Answer

I'm not going to provide an outright answer. But, something to consider when you are working with ParseQuery and Parse callbacks is that they should always have the generic type specified. Doing this helps the IDE (and javac) analyze the code to help prevent you from making mistakes, like in the sample code in the origin post.

Rewatching the video explaining about the ParseQuery and its "type" should help. Also, make sure that the "type" is the same for the query and callback. ;)