上下文菜单以及选项菜单

代码

public class MainActivity extends AppCompatActivity {

    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.btn_context);
//        注册上下文菜单
        registerForContextMenu(button);
    }

//   创建上下文此菜单的方法

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
//        加载菜单的布局并且设置菜单对象
        getMenuInflater().inflate(R.menu.mymenu, menu);
    }

    //上下文菜单项的监听
    @Override
    public boolean onContextItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menu_start:
                Toast.makeText(MainActivity.this, "游戏已经开始", Toast.LENGTH_SHORT).show();
                break;
            case R.id.menu_end:
                Toast.makeText(MainActivity.this, "结束游戏", Toast.LENGTH_SHORT).show();
                break;
        }

        return super.onContextItemSelected(item);
    }

    //c创建选项菜单的方法
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(0, 0, 100, "开始游戏");
        menu.add(0, 1, 101, "结束游戏");
        SubMenu stubmenu = menu.addSubMenu(0, 2, 103, "游戏设置");
        stubmenu.add(1, 3, 100, "背景设置");
        stubmenu.add(1, 4, 100, "音乐设置");
        return super.onCreateOptionsMenu(menu);
    }

//选项菜单项的监听
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()) {
            case 0:
                Toast.makeText(MainActivity.this, "游戏已经开始", Toast.LENGTH_SHORT).show();
                break;
            case 1:
                Toast.makeText(MainActivity.this, "结束游戏了", Toast.LENGTH_SHORT).show();
                break;
            case 2:
                Toast.makeText(MainActivity.this, "游戏设置", Toast.LENGTH_SHORT).show();
                break;
            case 3:
                Toast.makeText(MainActivity.this, "背景设置", Toast.LENGTH_SHORT).show();
                break;
            case 4:
                Toast.makeText(MainActivity.this, "音乐游戏", Toast.LENGTH_SHORT).show();
                break;
        }
        return super.onOptionsItemSelected(item);
    }

}

xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.day05menudemo.MainActivity">

  <Button
      android:id="@+id/btn_context"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="弹出上下文菜单"
      />
</RelativeLayout>