选项菜单之二级菜单

package com.example.optionmenu_02;

import android.R.color;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.widget.TextView;

public class MainActivity extends Activity {
private TextView tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) this.findViewById(R.id.tv);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
//设置子菜单
SubMenu fontMenu = menu.addSubMenu(0, 100, 0, "字体大小");
//设置子菜单包含的选项
fontMenu.add(0, 110, 0, "10号字体");
fontMenu.add(0, 111, 0, "12号字体");
fontMenu.add(0, 112, 0, "14号字体");
fontMenu.add(0, 113, 0, "16号字体");
fontMenu.setHeaderTitle("请选择字体大小");
fontMenu.setHeaderIcon(R.drawable.ic_launcher);

//一般的菜单
menu.add(1,101,0,"普通菜单栏");

SubMenu colorMenu = menu.addSubMenu("字体颜色");
colorMenu.add(0, 115, 0, "红色");
colorMenu.add(0, 116, 0, "绿色");
colorMenu.add(0, 117, 0, "蓝色");
colorMenu.setHeaderTitle("选择字体颜色");
colorMenu.setHeaderIcon(R.drawable.ic_launcher);
return true;
}

//菜单被点击时的点击事件
@Override
public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {
case 110:
tv.setTextSize(10 * 2);
break;
case 111:
tv.setTextSize(12 * 2);
break;
case 112:
tv.setTextSize(14 * 2);
break;
case 113:
tv.setTextSize(16 * 2);
break;

case 115:
tv.setTextColor(Color.RED);
break;
case 116:
tv.setTextColor(Color.GREEN);
break;
case 117:
tv.setTextColor(Color.BLUE);
break;

default:
break;
}
return super.onOptionsItemSelected(item);
}

}