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

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

What's the error? please post the error.

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

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!