Android 第四十四章 Menu

public class MainActivity extends AppCompatActivity {

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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.test, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.msg:
                Toast.makeText(MainActivity.this, "you click message", Toast.LENGTH_SHORT).show();
                break;
            case R.id.set:
                Toast.makeText(MainActivity.this, "you click set", Toast.LENGTH_SHORT).show();
                break;
        }
        return true;
    }
}

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

    <item
        android:id="@+id/msg"
        android:title="消息" />
    <item
        android:id="@+id/set"
        android:title="设置" />
menu>