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Android Build a Self-Destructing Message Android App Using Fragments for Tabs Understanding the Rest of the Pieces

Posted by Henrique Teodoro
Henrique Teodoro
584 Points

What i should do Here?

I'm not understanding what i should do on this lesson.... :(

PhotoFragment.java 
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class PhotoFragment extends Fragment {

    public Button mDeleteButton;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_photo, container, false);

        return rootView;
    }
}
MainActivity.java 
import android.app.ActionBar;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.util.Log;

public class MainActivity extends Activity implements ActionBar.TabListener {

    public static final String TAG = MainActivity.class.getSimpleName();

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

    }

    @Override
    public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {

    }

    @Override
    public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {

    }

    @Override
    public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {

    }
}

1 Answer

orbyt
orbyt
10,358 Points

For the first part of the challenge, you simply need to attach the mDeleteButton to the view in the layout with the Id "deleteButton". What probably confused you is that you cant use the regular findViewByID() method here. In the onCreateView() method, use the rootView object to call the findViewById() method, like so:

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_photo, container, false);
         mDeleteButton = (Button) rootView.findViewById(R.id.deleteButton);
        return rootView;
    }

For the second part of the challenge, its just a simple log statement. In the onTabSelected() method, just add something like: 

Log.i(TAG, "New tab!");

Please note ActionBar.Tabs has been deprecated for awhile now, so you probably wont be using those methods when writing current code.

Henrique Teodoro
Henrique Teodoro
584 Points

Thank you dude :) and yes... I was using the findViewById() regular method .-.

orbyt
orbyt
10,358 Points

np, be sure to mark this as answered if your issue is resolved.