如何在Activity中使用onCreateOptionsMenu（）哪个扩展ListActivity

Question

I have a problem about my android app project.

I have a MainActivity which is below:

public class MainActivity extends ListActivity {

    private NotesDataSource datasource;
    List<NoteItem> notesList;



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

        datasource = new NotesDataSource(this);

        refreshDisplay();
    }

    private void refreshDisplay() {
        notesList = datasource.findAll();
        ArrayAdapter<NoteItem> adapter = new ArrayAdapter<NoteItem>(this, R.layout.list_item_layout, notesList);
        setListAdapter(adapter);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }


}

And Also I have a menu_main.xml:

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">

    <item android:id="@+id/action_create"
        android:title="@string/action_create"
        android:orderInCategory="100"
        app:showAsAction="always|withText"
        android:icon="@drawable/create_note"/>
</menu>

At this point the problem is starting. I have changed my superclass from ActionBarActivity to ListActivity then, when I run my app on my device, I can not see my create icon (and the top menu which include app name). What's wrong? And idea?

(Btw I am using Android Studio Ide)

Answer 1

Your theme is probably still based on Theme.AppCompat . If you want to use Theme.AppCompat , you have to inherit from ActionBarActivity . If you want to use ListActivity , you cannot use Theme.AppCompat .

Note that you do not need to use ListActivity to have a ListView in an activity. Here is a sample project demonstrating the use of Theme.AppCompat with an ActionBarActivity and a ListView . Here is another sample project , the same as the previous one, except that I apply custom tints to the action bar.