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

Posted by thamer alnajdat
thamer alnajdat
Courses Plus Student 450 Points

How to solve this example ?

I want to solve this example but this error appear can you help me please ?

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);
            mDeleteButton = (Button)findViewById(R.id.deleteButton);

    }

    @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) {

    }
}
aakarshrestha
aakarshrestha
6,509 Points
aakarshrestha
aakarshrestha
6,509 Points

What's the error? please post the error.

thamer alnajdat
thamer alnajdat
Courses Plus Student 450 Points

this the error "Bummer! Make sure you are setting the button in the correct lifecycle method for a Fragment!" AAKAR SHRESTHA

aakarshrestha
aakarshrestha
6,509 Points
aakarshrestha
aakarshrestha
6,509 Points

Move your code "mDeleteButton = (Button)findViewById(R.id.deleteButton);" from onCreate to onCreateView method in PhotoFragment class.

Write it this way: mDeleteButton = (Button) rootView.findViewById(R.id.deleteButton);

Hope it helps.

Happy coding!