Android - 菜单项无法解析为onOptionsItemSelected（）中的类型

Question

I created a simple activity (with a menu) and tried adding menu items but they don't show up when trying to actually give them some function in the onOptionsItemSelected() method. I'm not sure why it's not working, as I did the exact same thing in the menu for the main activity and it worked just fine. When typing in android.R.id.add_screen_submit_button for example, it is not recognized as existing. And if I forcefully just type it in and leave it the message "add_screen_submit_button cannot be resolved or is not a field" comes up. The menu is also in the correct folder (I actually just left it as is when creating the Activity). Thanks in advance.

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item
    android:id="@+id/add_screen_submit_button"
    android:orderInCategory="4"
    android:showAsAction="always"
    android:title="@string/add_screen_ok"
    android:icon="@drawable/accept_icon" />

<item
    android:id="@+id/add_screen_cancel_button"
    android:orderInCategory="5"
    android:showAsAction="always"
    android:title="@string/add_screen_cancel"
    android:icon="@drawable/cancel_icon" />

</menu>

Here's the code

public class AddActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add);
    // Show the Up button in the action bar.
    //setupActionBar();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.add_menu, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case android.R.id.home:
        NavUtils.navigateUpFromSameTask(this);
        return true;
    case android.R.id.add_screen_submit_button:
        Toast.makeText(this, "Map Selected", Toast.LENGTH_SHORT).show();
        break;  
    default:
        break;
    }
    return super.onOptionsItemSelected(item);
}

}

Answer 1

Change

android.R.id.home:

to

R.id.home:

and the same with the other one.

android.R is for sdk resources and R.id.some_id is for id s you create