<?xml version="1.0" encoding="utf-8"?><menu xmlns:android="http://schemas.android.com/apk/res/android"><itemandroid:id="@+id/add"android:title="添加"android:orderInCategory="4"/><itemandroid:id="@+id/delete"android:title="删除"android:orderInCategory="1"/><itemandroid:id="@+id/query"android:title="查询"android:orderInCategory="2"/><itemandroid:id="@+id/update"android:title="更新"android:orderInCategory="3"/>
</menu>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/btn"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="弹出上下文菜单"/>
</LinearLayout>

package com.example.contextMenuTest;import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;public class MyActivity extends Activity {private Button button;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);button = (Button) findViewById(R.id.btn);//为按钮注册contextMenu，当你长按按钮的时候就会调用onCreateContextMenu方法
        registerForContextMenu(button);}/*** 注意：每次长按注册了contextMenu的控件，都会重新调用该方法*/@Overridepublic void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {System.out.println("com.example.contextMenuTest.MyActivity.onCreateContextMenu");getMenuInflater().inflate(R.menu.basic_main, menu);//设置标题栏的图标
        menu.setHeaderIcon(R.drawable.ic_launcher);//设置标题栏的文字menu.setHeaderTitle("请选择操作");}@Overridepublic boolean onContextItemSelected(MenuItem item) {switch (item.getItemId()) {case R.id.add:Toast.makeText(this, "你点击了添加！", 1).show();break;case R.id.delete:Toast.makeText(this, "你点击了删除！", 1).show();break;case R.id.update:Toast.makeText(this, "你点击了修改！", 1).show();break;case R.id.query:Toast.makeText(this, "你点击了查询！", 1).show();break;}return true;}
}