ContextMenu上下文菜单

上下文菜单一般是真针对ListView(多条数据的操作)

　　需求：在ListView中显示通话记录的电话号码，长按显示的上下文菜单为复制号码到拨号盘、发送信息、复制号码，与之相对应的事件。

　　

 

布局代码：

　　

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/listview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</LinearLayout>

MainActivity

package com.android.hzy.contextmenu;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.provider.CallLog.Calls;
import android.text.ClipboardManager;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {

    private static final int MENU_DIAL_ID = 0;
    private static final int MENU_SMS_ID = 1;
    private static final int MENU_COPY_ID = 2;
    private ListView listview;
    private MyAdapter adapter;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        listview = (ListView) findViewById(R.id.listview);
        Cursor c = getContentResolver().query(Calls.CONTENT_URI, new String[]{Calls._ID,Calls.NUMBER}, null, null, null);
        adapter = new MyAdapter(this, c);
        // 如果数据是来自于手机本身的数据库   使用CursorAdapter的子类
        listview.setAdapter(adapter);
        
        // 给listview注册上下文菜单
        registerForContextMenu(listview);
    }

    /**
     * 创建上下文菜单
     */
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        // TODO Auto-generated method stub
        menu.add(0, MENU_DIAL_ID, 0, "复制号码到拨号盘");
        menu.add(0, MENU_SMS_ID, 0, "发送短信");
        menu.add(0, MENU_COPY_ID, 0, "复制号码");
        super.onCreateContextMenu(menu, v, menuInfo);
    }
    
    /**
     * 上下文菜单被选择
     */
    @Override
    public boolean onContextItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) item.getMenuInfo();
        int position = acmi.position;
        Cursor cursor = (Cursor) adapter.getItem(position);
        String number = cursor.getString(cursor.getColumnIndex(Calls.NUMBER)); 
        
        int id = item.getItemId();
        Intent intent = null;
        switch (id) {
        case MENU_DIAL_ID:
            intent = new Intent();
            intent.setAction(Intent.ACTION_DIAL);
            intent.setData(Uri.parse("tel:"+number));
            startActivity(intent);
            break;
            
        case MENU_SMS_ID:
            intent = new Intent();
            intent.setAction(Intent.ACTION_SENDTO);
            intent.setData(Uri.parse("smsto:"+number));
            startActivity(intent);
            break;
            
        case MENU_COPY_ID:
            // 得到剪贴版服务
            ClipboardManager cm = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
            // 将内容放到剪贴版本中
            cm.setText(number);
            break;

        default:
            break;
        }
        return super.onContextItemSelected(item);
    }
    
    private final class MyAdapter extends CursorAdapter{

        public MyAdapter(Context context, Cursor c) {
            super(context, c);
            // TODO Auto-generated constructor stub
        }

        // 创建item的布局
        @Override
        public View newView(Context context, Cursor cursor, ViewGroup parent) {
            // TODO Auto-generated method stub
            TextView tv = new TextView(context);
            tv.setTextSize(22);
            tv.setTextColor(Color.WHITE);
            
            return tv;
        }

        // 绑定数据
        @Override
        public void bindView(View view, Context context, Cursor cursor) {
            // TODO Auto-generated method stub
            // 得到数据 电话号码
            String number = cursor.getString(cursor.getColumnIndex(Calls.NUMBER));
            TextView tv = (TextView) view;
            tv.setText(number);
        }
        
    }
}

注：清单文件中需要添加权限

<uses-permission android:name="android.permission.READ_CONTACTS"/>