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Android 上下文菜单实现

1.覆盖Activity的onCreateContenxtMenu()方法,调用Menu的add方法添加菜单项(MenuItem)。
  2.覆盖Activity的onContextItemSelected()方法,响应上下文菜单菜单项的单击事件。
  3.调用registerForContextMenu()方法,为视图注册上下文菜单。
  
  JAVA代码:

  packageEOE.local.contextMenu;
  
  importandroid.app.ListActivity;
  importandroid.os.Bundle;
  importandroid.view.ContextMenu;
  importandroid.view.Menu;
  importandroid.view.MenuItem;
  importandroid.view.ContextMenu.ContextMenuInfo;
  importandroid.view.View;
  importandroid.widget.AdapterView.AdapterContextMenuInfo;
  importandroid.widget.ArrayAdapter;
  importandroid.util.Log;
  
  publicclassMainActivityextendsListActivity{
  
  privatestaticfinalintITEM1=Menu.FIRST;
  
  privatestaticfinalintITEM2=Menu.FIRST+1;
  
  privatestaticfinalintITEM3=Menu.FIRST+2;
  
  
  
  /**Calledwhentheactivityisfirstcreated.*/
  
  @Override
  public void onCreate(BundlesavedInstanceState){
  
  super.onCreate(savedInstanceState);
  
  showListView();
  
  
  //为ListView的所有item注册ContextMenu
  
  registerForContextMenu(getListView());
  
  //这里的registerForContextMenu()也可以用下面的语句替代
  
  //getListView().setOnCreateContextMenuListener(this);
  
  }
  
  
  
  privatevoidshowListView(){
  
  String[]mString=newString[]{
  
  "路飞-MonkeyDLuffy",
  "奈美-Nami",
  "卓洛-Zoro",
  "山治-Sanji",
  "尼可·罗宾-Ms.AllSunday",
  "乌索普-usoppu",
  "托尼托尼·乔巴-TonyTonyChopper",
  
  };
  
  ArrayAdapter<String>mla=newArrayAdapter<String>(MainActivity.this,
  
  R.layout.main,mString);
  
  MainActivity.this.setListAdapter(mla);
  
  }
  
  
  //上下文菜单,本例会通过长按条目激活上下文菜单
  @Override
  publicvoidonCreateContextMenu(ContextMenumenu,Viewview,
  
  ContextMenuInfomenuInfo){
  
  menu.setHeaderTitle("人物简介");
  
  //添加菜单项
  menu.add(0,ITEM1,0,"特长");
  
  menu.add(0,ITEM2,0,"战斗力");
  
  menu.add(0,ITEM3,0,"经典语录");
  
  }
  
  
  
  //菜单单击响应
  @Override
  publicbooleanonContextItemSelected(MenuItem item){
  
  //获取当前被选择的菜单项的信息
  
  //AdapterContextMenuInfo info=(AdapterContextMenuInfo)item.getMenuInfo();
  
  //Log.i("braincol",String.valueOf(info.id));
  
  switch(item.getItemId()){
  
  caseITEM1:
  
  //在这里添加处理代码
  
  break;
  
  
  
  caseITEM2:
  
  //在这里添加处理代码
  break;
  
  
  
  caseITEM3:
  
  //在这里添加处理代码
  break;
  
  }
  
  returntrue;
  
  }
  
  
  }

  main.xml布局文件:
  
    <?xmlversion="1.0"encoding="utf-8"?>
  
  <TextViewxmlns:android="http://schemas.android.com/apk/res/android"
  
  android:id="@+id/myTextView"
  android:textSize="20sp"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:text="@string/hello"
  
  />

 

Android 上下文菜单实现