Android上下文菜单用法实例分析

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent"
  android:orientation="vertical"
  xmlns:android="http://schemas.android.com/apk/res/android">
  <EditText android:text="第一文本框" 
    android:id="@+id/editText01"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />
  <EditText android:text="第二文本框" 
    android:id="@+id/editText02"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />
</LinearLayout>

package com.ljq.activity;
import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.EditText;
public class MeunActivity extends Activity {
  private EditText editText01=null;
  private EditText editText02=null;
  private final int MENU1 = 1;
  private final int MENU2 = 2;
  private final int MENU3 = 3;
  private final int MENU4 = 4;
  private final int MENU5 = 5;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    editText01=(EditText)findViewById(R.id.editText01);
    editText02=(EditText)findViewById(R.id.editText02);
    //为View对象注册上下文菜单
    this.registerForContextMenu(editText01);
    this.registerForContextMenu(editText02);
  }
  /**
   * 初始化上下文菜单
   * 
   * 每次调出上下文菜单时都会被调用一次
   */
  @Override
  public void onCreateContextMenu(ContextMenu menu, View v,
      ContextMenuInfo menuInfo) {
    menu.setHeaderIcon(R.drawable.header);
    switch (v.getId()) {
    case R.id.editText01:
      menu.add(0, MENU1, 0, "菜单项1");
      menu.add(0, MENU2, 0, "菜单项2");
      menu.add(0, MENU3, 0, "菜单项3");
      break;
    case R.id.editText02:
      menu.add(0, MENU4, 0, "菜单项4");
      menu.add(0, MENU5, 0, "菜单项5");
      break;
    }
    //super.onCreateContextMenu(menu, v, menuInfo);
  }
  /**
   * 当用户选择了上下文菜单选项后调用该事件
   */
  @Override
  public boolean onContextItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case MENU1:
    case MENU2:
    case MENU3:
      editText01.append("\n"+item.getTitle()+"被按下");
      break;
    case MENU4:
    case MENU5:
      editText02.append("\n"+item.getTitle()+"被按下");
      break;
    }
    return true;
  }
}