1、第一步
res下新建文件夹menu,menu下新建菜单文件main
main.xml 代码如下所示
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="@+id/add_item"
android:title="ADD" />
<item
android:id="@+id/remove_item"
android:title="Remove" />
</menu>
2、第二步
在FirstActivity(主活动)中重写(ctrl+o) onCreateOptionsMenu方法
FirstActivity代码如下所示
@Override
public boolean onCreateOptionsMenu(Menu menu) {//显示菜单
getMenuInflater().inflate(R.menu.main,menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {//菜单调用
switch (item.getItemId()) {
case R.id.add_item:
Toast.makeText(this,"you clicked ADD",Toast.LENGTH_SHORT).show();
break;
case R.id.remove_item:
Toast.makeText(this,"you clicked Remove",Toast.LENGTH_SHORT).show();
break;
default:
}
return true;
}