上下文菜单与上下文操作模式

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android 菜单分类：
菜单被分为如下三种，选项菜单（OptionsMenu）、上下文菜单（ContextMenu）和子菜单（SubMenu）
honeycomb 之前版本设备上主要使用浮动上下文菜单，之后的使用上下文操作栏模式（action mode）来进行操作

  类似：

左边为context menu 右侧为 Action Mode

<menu xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    tools:context=".MainActivity">    <item        android:id="@+id/action_settings"        android:icon="@android:drawable/ic_delete"        android:orderInCategory="100"        android:showAsAction="ifRoom|withText"        android:title="@string/app_name" />    <item        android:id="@+id/action_settings1"        android:icon="@android:drawable/ic_menu_add"        android:orderInCategory="100"        android:showAsAction="ifRoom|withText"        android:title="@string/app_name" />    <item        android:id="@+id/action_settings2"        android:icon="@android:drawable/ic_btn_speak_now"        android:orderInCategory="100"        android:showAsAction="ifRoom|withText"        android:title="@string/say" /></menu>

MainActivity 代码片段package com.wc.contextmenu;import android.os.Bundle;import android.support.v4.app.FragmentActivity;import android.view.ActionMode;import android.view.ContextMenu;import android.view.Menu;import android.view.MenuInflater;import android.view.MenuItem;import android.view.View;import android.widget.Button;public class MainActivity extends FragmentActivity {    private ActionMode actionMode;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);//        CrimeListFragment crimeListFragment = new CrimeListFragment();//        this.getSupportFragmentManager().beginTransaction().replace(R.id.fragment, crimeListFragment).commit();        Button button = (Button) findViewById(R.id.button);        button.setOnLongClickListener(new View.OnLongClickListener() {            // Called when the user long-clicks on someView            public boolean onLongClick(View view) {//                if (actionMode != null) {//                    return false;//                }                // Start the CAB using the ActionMode.Callback defined above                actionMode = MainActivity.this.startActionMode(mCallback);                view.setSelected(true);                return true;            }        });    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        //getMenuInflater().inflate(R.menu.menu_main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        int id = item.getItemId();        switch (id) {            case R.id.action_settings:                break;            default:                return super.onOptionsItemSelected(item);        }        return super.onOptionsItemSelected(item);    }    @Override    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {        // MainActivity.this.getMenuInflater().inflate(R.menu.menu_main, menu);    }    private ActionMode.Callback mCallback = new ActionMode.Callback() {        @Override        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {            return false;        }        @Override        public void onDestroyActionMode(ActionMode mode) {            // TODO Auto-generated method stub        }        @Override        public boolean onCreateActionMode(ActionMode mode, Menu menu) {            MenuInflater inflater = mode.getMenuInflater();            inflater.inflate(R.menu.menu_main, menu);            return true;        }        @Override        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {            boolean ret = false;            if (item.getItemId() == R.id.action_settings) {                mode.finish();                ret = true;            }            return ret;        }    };}

上面的代码生成这个样式子

Context menu: 1.创建; 2.option Context 区别

option context 通过手机自带的meum 进行调用触发，而 ContextMeum 通过指定的方式进行触发

在这里进行创建  @Override    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {        super.onCreateContextMenu(menu, v, menuInfo);    }监听点击事件   @Override    public boolean onContextItemSelected(MenuItem item) {        int id = item.getItemId();        switch (id) {            case R.id.action_settings: //获取点击的位置。得到对象                AdapterView.AdapterContextMenuInfo adapterContextMenuInfo =         (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();                int position = adapterContextMenuInfo.position;                ArrayAdapter arrayAdapter = (ArrayAdapter) getListAdapter();                String showParamter = (String) arrayAdapter.getItem(position);                list1.remove(showParamter);                ((ArrayAdapter) getListAdapter()).notifyDataSetChanged();                break;            case R.id.action_settings1:                Toast.makeText(getActivity(), "click 上下文菜单 --在这里可以进行删除操作", 400).show();                break;            default:                return super.onOptionsItemSelected(item);        }        return super.onContextItemSelected(item);    }

参考：http://blog.csdn.net/xyz_lmn/article/details/12754785
android 权威指南 18 章节

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