android--widget之menu

1、布局

<?xml version="1.0" encoding="utf-8"?>
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

            android:id="@+id/menuview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/menuviewtext" />

            android:id="@+id/menubutton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/menubuttontext1" />

            android:id="@+id/menubutton2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/menubuttontext2" />

2、Activity

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

public class MenuDemoActivity extends Activity {

private Button menuButton1;

private Button menuButton2;

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.menulayout);
  menuButton1 = (Button) findViewById(R.id.menubutton1);
  menuButton2 = (Button) findViewById(R.id.menubutton2);
  menuButton1.setVisibility(View.INVISIBLE);
  menuButton2.setVisibility(View.INVISIBLE);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
  super.onCreateOptionsMenu(menu);
  menu.add(0, 0, 0, R.string.menubuttontext1);
  menu.add(1, 1, 1, R.string.menubuttontext2);
  return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
  case 0:
   menuButton1.setVisibility(View.VISIBLE);
   menuButton2.setVisibility(View.GONE);
   break;
  case 1:
   menuButton1.setVisibility(View.GONE);
   menuButton2.setVisibility(View.VISIBLE);
   break;
  }
  return super.onOptionsItemSelected(item);
}
}

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