Notification可以在屏幕最顶部的状态栏上显示一个图标通知,通知的同时可以播放声音,以及振动提示用户,点击通知还可以返回指定的Activity.
今天例子的效果图:
布局main.xml:<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <Button android:id="@+id/bt1" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="Notification测试" /> <Button android:id="@+id/bt2" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="清除Notification" /> </LinearLayout>java代码:package com.pocketdigi.Notification;
import android.app.Activity;
import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button;public class main extends Activity {
/** Called when the activity is first created. */ int notification_id=19172439; NotificationManager nm; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); nm=(NotificationManager)getSystemService(NOTIFICATION_SERVICE); Button bt1=(Button)findViewById(R.id.bt1); bt1.setOnClickListener(bt1lis); Button bt2=(Button)findViewById(R.id.bt2); bt2.setOnClickListener(bt2lis);}
OnClickListener bt1lis=new OnClickListener(){@Override
public void onClick(View v) { // TODO Auto-generated method stub showNotification(R.drawable.home,"图标边的文字","标题","内容"); }};
OnClickListener bt2lis=new OnClickListener(){@Override
public void onClick(View v) { // TODO Auto-generated method stub //showNotification(R.drawable.home,"图标边的文字","标题","内容"); nm.cancel(notification_id); }};
public void showNotification(int icon,String tickertext,String title,String content){ //设置一个唯一的ID,随便设置//Notification管理器
Notification notification=new Notification(icon,tickertext,System.currentTimeMillis()); //后面的参数分别是显示在顶部通知栏的小图标,小图标旁的文字(短暂显示,自动消失)系统当前时间(不明白这个有什么用) notification.defaults=Notification.DEFAULT_ALL; //这是设置通知是否同时播放声音或振动,声音为Notification.DEFAULT_SOUND //振动为Notification.DEFAULT_VIBRATE; //Light为Notification.DEFAULT_LIGHTS,在我的Milestone上好像没什么反应 //全部为Notification.DEFAULT_ALL //如果是振动或者全部,必须在AndroidManifest.xml加入振动权限 PendingIntent pt=PendingIntent.getActivity(this, 0, new Intent(this,main.class), 0); //点击通知后的动作,这里是转回main 这个Acticity notification.setLatestEventInfo(this,title,content,pt); nm.notify(notification_id, notification);}
}AndroidManifest.xml加入权限:<uses-permission android:name="android.permission.VIBRATE" />
<!-- 允许振动 -->