Android中通过Notification&NotificationManager实现消息通知

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:paddingBottom="@dimen/activity_vertical_margin"  android:paddingLeft="@dimen/activity_horizontal_margin"  android:paddingRight="@dimen/activity_horizontal_margin"  android:paddingTop="@dimen/activity_vertical_margin"  android:orientation="vertical"  tools:context=".MainActivity" >    <Button       android:id="@+id/btn_01"      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:text="3.0以前版本的notification，用新的吧"      android:onClick="click"      />    <Button       android:id="@+id/btn_02"      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:text="大视图文本通知"      android:onClick="click"      />    <Button       android:id="@+id/btn_03"      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:text="大视图图片通知"      android:onClick="click"      />    <Button       android:id="@+id/btn_04"      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:text="进度条通知"      android:onClick="click"      /></LinearLayout>

 package com.xin.day__notificationdemo;  import java.util.Timer;  import java.util.TimerTask;  import android.app.Activity;  import android.app.Notification;  import android.app.NotificationManager;  import android.app.PendingIntent; import android.content.Intent; import android.graphics.BitmapFactory; import android.os.Bundle; import android.support.v.app.NotificationCompat; import android.support.v.app.NotificationCompat.BigPictureStyle; import android.support.v.app.NotificationCompat.BigTextStyle; import android.support.v.app.NotificationCompat.Builder; import android.util.Log; import android.view.View; public class MainActivity extends Activity {   //通知的唯一标识，在一个应用程序中不同的通知要区别开来   private static final int NO = x;   private static final int NO = x;   private static final int NO = x;   private static final int NO = x;   //进度条要用   private int progress = ;   @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);   }   //click方法，和xml文件中的各个按钮的onClick属性的值要一致   public void click(View view) {     //创建NotificationManager     final NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);     //用switch语句控制四个控件     switch (view.getId()) {     case R.id.btn_: {       Notification notification = new Notification();       notification.icon = R.drawable.ic_launcher;       notification.tickerText = "有消息了。。。";       Intent intent = new Intent(this, MainActivity.class);       PendingIntent pendingIntent = PendingIntent.getActivity(this, ,           intent, PendingIntent.FLAG_UPDATE_CURRENT);       notification.setLatestEventInfo(this, ".以前的通知", "试试而已", pendingIntent);       notification.when = System.currentTimeMillis();       notification.defaults = Notification.DEFAULT_ALL;       notification.flags = Notification.FLAG_AUTO_CANCEL;       notification.number = ;       notification.vibrate = new long[]{, };       manager.notify(NO, notification);     }     break;     case R.id.btn_:{       //大视图文本通知       //创建消息构造器,在扩展包       NotificationCompat.Builder builder = new NotificationCompat.Builder(this);       //设置当有消息是的提示，图标和提示文字       builder.setSmallIcon(R.drawable.ic_launcher).setTicker("有新消息了");       //需要样式       BigTextStyle style = new BigTextStyle();       style.setBigContentTitle("上课通知");//通知的标题       style.bigText("今天下午要在综B上jsp");//通知的文本内容       //大视图文本具体内容       style.setSummaryText("这是正常的课程安排，请各位同学按时上课");       builder.setStyle(style);       //显示消息到达的时间，这里设置当前时间       builder.setWhen(System.currentTimeMillis());       //获取一个通知对象       Notification notification = builder.build();       notification.flags = Notification.FLAG_AUTO_CANCEL;       //发送(显示)通知       //notify()第一个参数id An identifier for this notification unique within your application       //get?意思说，这个通知在你的应用程序中唯一的标识符       manager.notify(NO, notification);     }     break;     case R.id.btn_:{       //大视图图片通知       NotificationCompat.Builder builderPic = new Builder(this);       builderPic.setSmallIcon(R.drawable.ic_launcher).setTicker("新浪体育提醒");       //进行设置       BigPictureStyle pictureStyle = new BigPictureStyle();       pictureStyle.setBigContentTitle("新浪体育 快船VS骑士 ");       pictureStyle.bigPicture(BitmapFactory.decodeResource(getResources(), R.drawable.ic_game));       pictureStyle.setSummaryText(" 快船VS骑士 天王山之战！！！");//不要在意文字       //设置样式       builderPic.setStyle(pictureStyle);       //设置显示的时间       builderPic.setWhen(System.currentTimeMillis());       Notification notification = pictureStyle.build();       notification.flags = Notification.FLAG_AUTO_CANCEL;       //       manager.notify(NO, notification);     }     break;     case R.id.btn_:{       //进度条通知       final NotificationCompat.Builder builderProgress = new NotificationCompat.Builder(this);       builderProgress.setSmallIcon(R.drawable.ic_launcher).setTicker("进度条通知");       builderProgress.setProgress(, progress, false);       final Notification notification = builderProgress.build();       //发送一个通知       manager.notify(NO, notification);       //创建一个计时器       Timer timer = new Timer();       timer.schedule(new TimerTask(){         @Override         public void run() {           Log.i("progress",progress+"");           while(progress <= ){             progress ++;             try {               Thread.sleep();             } catch (InterruptedException e) {               // TODO Auto-generated catch block               e.printStackTrace();             }             //更新进度条             builderProgress.setProgress(, progress, false);             //再次通知             manager.notify(NO, builderProgress.build());           }           //计时器退出           this.cancel();           //进度条退出           manager.cancel(NO);           return;//结束方法         }       }, );     }     break;     default:       break;     }   } }