Android项目仿UC浏览器和360手机卫士消息常驻栏（通知栏）

package com.example.textwsjdemo; 
 
import android.app.Activity; 
import android.app.Notification; 
import android.app.NotificationManager; 
import android.app.PendingIntent; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.os.Bundle; 
import android.view.KeyEvent; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.RemoteViews; 
import android.widget.Toast; 
 
public class MainActivity extends Activity { 
 
 private Button bt_hehe; 
 private NotificationManager notificationManager; 
 private Notification notification; 
 private int icon; 
 private CharSequence tickerText; 
 private long when; 
 RemoteViews contentView; 
 private Intent intent; 
 private PendingIntent pendingIntent; 
 private int notification_id = 0; 
 private MyBroadCast receiver; 
 private static String ACTION = "a"; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  receiver = new MyBroadCast(); 
  IntentFilter filter = new IntentFilter(); 
  filter.addAction("a"); 
  filter.addAction("b"); 
  filter.addAction("c"); 
  filter.addAction("d"); 
  registerReceiver(receiver, filter); 
 
  initView(); 
  initData(); 
 
 } 
 
 private void initData() { 
  icon = R.drawable.ic_launcher; // 通知图标 
  tickerText = "Hello"; // 状态栏显示的通知文本提示 
  when = System.currentTimeMillis(); // 通知产生的时间，会在通知信息里显示 
 } 
 
 private void initView() { 
  bt_hehe = (Button) findViewById(R.id.bt_hehe); 
  bt_hehe.setOnClickListener(new OnClickListener() { 
 
   @Override 
   public void onClick(View v) { 
    // TODO Auto-generated method stub 
    // 启动提示栏 
    createNotification(); 
   } 
  }); 
 } 
 
 private void createNotification() { 
  notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 
  notification = new Notification(); 
  notification.icon = icon; 
  notification.tickerText = tickerText; 
  notification.when = when; 
 
  /*** 
   * 在这里我们用自定的view来显示Notification 
   */ 
  contentView = new RemoteViews(getPackageName(), 
    R.layout.notification_item); 
  contentView.setTextViewText(R.id.text11, "小说"); 
  contentView.setTextViewText(R.id.text22, "视频"); 
  contentView.setTextViewText(R.id.text33, "新闻"); 
  contentView.setTextViewText(R.id.text44, "扯淡"); 
  // contentView.setTextViewText(R.id.notificationPercent, "0%"); 
  // contentView.setProgressBar(R.id.notificationProgress, 100, 0, false); 
  // //进度条 
  // contentView.setImageViewResource(R.id.image,R.drawable.more_advice); 
  // //加载图片 
  // contentView.setImageViewResource(R.id.image,R.drawable.more_attention); 
  // contentView.setImageViewResource(R.id.image,R.drawable.more_evaluate); 
  // contentView.setImageViewResource(R.id.image,R.drawable.more_about); 
  // contentView.setTextViewText(R.id.text,"Hello,this message is in a custom expanded view"); 
  // //文本 
 
   
  notification.flags = Notification.FLAG_ONGOING_EVENT; // 设置常驻，不能滑动取消 
  //默认跳转的主界面 
  intent = new Intent(this, MainActivity.class); 
  intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); 
  pendingIntent = PendingIntent.getActivity(this, 0, intent, 0); 
   
  //自定义跳转 
  contentView.setOnClickPendingIntent(R.id.ll_11, PendingIntent.getBroadcast(MainActivity.this, 11, new Intent().setAction("a"), PendingIntent.FLAG_UPDATE_CURRENT)); 
  contentView.setOnClickPendingIntent(R.id.ll_22, PendingIntent.getBroadcast(MainActivity.this, 11, new Intent().setAction("b"), PendingIntent.FLAG_UPDATE_CURRENT)); 
  contentView.setOnClickPendingIntent(R.id.ll_33, PendingIntent.getBroadcast(MainActivity.this, 11, new Intent().setAction("c"), PendingIntent.FLAG_UPDATE_CURRENT)); 
  contentView.setOnClickPendingIntent(R.id.ll_44, PendingIntent.getBroadcast(MainActivity.this, 11, new Intent().setAction("d"), PendingIntent.FLAG_UPDATE_CURRENT)); 
  notification.contentView = contentView; 
  notification.contentIntent = pendingIntent; 
  notificationManager.notify(notification_id, notification); 
 } 
 
 // 取消通知 
 private void cancelNotification() { 
  notificationManager.cancelAll(); 
 } 
 
 @Override 
 protected void onDestroy() { 
  cancelNotification(); 
  unregisterReceiver(receiver); 
 
 } 
 
 @Override 
 public boolean onKeyDown(int keyCode, KeyEvent event) { 
  if ((keyCode == KeyEvent.KEYCODE_BACK)) { 
   System.out.println("按下了back键 onKeyDown()"); 
   cancelNotification(); 
  } 
  return super.onKeyDown(keyCode, event); 
 } 
  
 class MyBroadCast extends BroadcastReceiver { 
 
  @Override 
  public void onReceive(Context context, Intent intent) { 
   if(intent.getAction().equals("a")){ 
    Toast.makeText(MainActivity.this, "11111111111111", 
      Toast.LENGTH_LONG).show(); 
    startActivity(new Intent(MainActivity.this, ActivityText1.class)); 
   } 
   if(intent.getAction().equals("b")){ 
    Toast.makeText(MainActivity.this, "222222222222222", 
      Toast.LENGTH_LONG).show(); 
    startActivity(new Intent(MainActivity.this, ActivityText2.class)); 
   } 
   if(intent.getAction().equals("c")){ 
    Toast.makeText(MainActivity.this, "333333333333", 
      Toast.LENGTH_LONG).show(); 
    startActivity(new Intent(MainActivity.this, ActivityText3.class)); 
   } 
   if(intent.getAction().equals("d")){ 
    Toast.makeText(MainActivity.this, "4444444444444", 
      Toast.LENGTH_LONG).show(); 
    startActivity(new Intent(MainActivity.this, ActivityText4.class)); 
   } 
    
  } 
 
 } 
 
} 

/* 
* 添加声音 
* notification.defaults |=Notification.DEFAULT_SOUND; 
* 或者使用以下几种方式 
* notification.sound = Uri.parse("file:///sdcard/notification/ringer.mp3"); 
* notification.sound = Uri.withAppendedPath(Audio.Media.INTERNAL_CONTENT_URI, "6"); 
* 如果想要让声音持续重复直到用户对通知做出反应，则可以在notification的flags字段增加"FLAG_INSISTENT" 
* 如果notification的defaults字段包括了"DEFAULT_SOUND"属性，则这个属性将覆盖sound字段中定义的声音 
*/ 
/* 
* 添加振动 
* notification.defaults |= Notification.DEFAULT_VIBRATE; 
* 或者可以定义自己的振动模式： 
* long[] vibrate = {0,100,200,300}; //0毫秒后开始振动，振动100毫秒后停止，再过200毫秒后再次振动300毫秒 
* notification.vibrate = vibrate; 
* long数组可以定义成想要的任何长度 
* 如果notification的defaults字段包括了"DEFAULT_VIBRATE",则这个属性将覆盖vibrate字段中定义的振动 
*/ 
/* 
* 添加LED灯提醒 
* notification.defaults |= Notification.DEFAULT_LIGHTS; 
* 或者可以自己的LED提醒模式: 
* notification.ledARGB = 0xff00ff00; 
* notification.ledOnMS = 300; //亮的时间 
* notification.ledOffMS = 1000; //灭的时间 
* notification.flags |= Notification.FLAG_SHOW_LIGHTS; 
*/ 
/* 
* 更多的特征属性 
* notification.flags |= FLAG_AUTO_CANCEL; //在通知栏上点击此通知后自动清除此通知 
* notification.flags |= FLAG_INSISTENT; //重复发出声音，直到用户响应此通知 
* notification.flags |= FLAG_ONGOING_EVENT; //将此通知放到通知栏的"Ongoing"即"正在运行"组中 
* notification.flags |= FLAG_NO_CLEAR; //表明在点击了通知栏中的"清除通知"后，此通知不清除， 
* //经常与FLAG_ONGOING_EVENT一起使用 
* notification.number = 1; //number字段表示此通知代表的当前事件数量，它将覆盖在状态栏图标的顶部 
* //如果要使用此字段，必须从1开始 
* notification.iconLevel = ; //