Android_Notification

<RelativeLayout 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"
tools:context="com.example.notificationdemo.MainActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center_horizontal"
>
<Button
android:id="@+id/send_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="send Message"/>
<Button
android:id="@+id/cancel_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="cancel Message"
/>
</LinearLayout>
</RelativeLayout>

package com.example.notificationdemo;

import android.app.Activity;
import android.app.Notification;
import android.app.Notification.Builder;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

/**
* Notification是显示在手机状态栏的消息（手机状态栏位于手机最顶端），代表一种全局效果的通知 通知栏的内容：图标，标题，内容，时间，点击后响应
* 如何实现通知栏： 获取notificationManager 显示通知栏：notify(id,notification) 取消通知栏：cancel(id)
* 构造Notification并设置显示内容 通知栏通知可以设置声音提示，指示灯以及震动效果，后两者注意需添加权限
*
*
* @author Administrator
*
*/
public class MainActivity extends Activity implements OnClickListener {

private Button send;
private Button cancel;
private NotificationManager manager;
private int NOTIFICATION_ID;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
send = (Button) findViewById(R.id.send_btn);
cancel = (Button) findViewById(R.id.cancel_btn);
send.setOnClickListener(this);
cancel.setOnClickListener(this);
manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);//系统常用服务
}

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.send_btn:
sendNotification();
break;
case R.id.cancel_btn:
manager.cancel(NOTIFICATION_ID);//取消发送的通知
break;
}
}

/**
* 构造notification并发送到通知栏
*/
private void sendNotification() {
// TODO Auto-generated method stub
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pintent = PendingIntent.getActivity(this, 0, intent, 0);
Builder builder = new Notification.Builder(this);
builder.setSmallIcon(R.drawable.ic_launcher);// 设置图标
builder.setTicker("hello");// 设置手机状态栏的提示
// 拖拽开手机状态栏提示的内容
builder.setWhen(System.currentTimeMillis());// 设置时间
builder.setContentTitle("通知");// 设置标题
builder.setContentText("内容");// 设置内容
builder.setContentIntent(pintent);// 设置点击之后的响应,意图

/*
* builder.setDefaults(Notification.DEFAULT_SOUND);//设置声音
* builder.setDefaults(Notification.DEFAULT_LIGHTS);//设置指示灯
* builder.setDefaults(Notification.DEFAULT_VIBRATE);//设置震动
*/
builder.setDefaults(Notification.DEFAULT_ALL);
Notification notification = builder.getNotification();// 4.1以下
// builder.build();//4.1及以上
manager.notify(NOTIFICATION_ID, notification);//发送通知到通知栏
}

}