Notification是显示在手机状态的通知，一般显示手机当前的网络状态、电池状态、时间等。
设置Notification涉及到两个类，一个类是NotificationManager,一个类是Notification。可以这样理解这两个 类，NotificationManager相当于顺丰快递小哥，notification代表的就是我们送的信件，我们要发送信件首先打电话给顺丰小 哥，相当于初始化NotificationManager,然后填写好信件，相当于初始化Notifiaction,然后小哥发送信件，就是 notificationmanager.notify(notifaction)
1）初始化NotificationManager： this.getSystemService(Context.NOTIFICATION_SERVICE);
2)初始化Notification：new Notification.Builder(this).builder();
main.xml:
<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"
tools:context=".Main" >
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="发送notification" />
<Button
android:id="@+id/deletebtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="200sp"
android:text="取消notification" />
</RelativeLayout>
Main.java:
package com.app.main;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class Main extends Activity {
NotificationManager manager = null;
Button button, btn1;
int responseCode = 0x123;
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button = (Button) this.findViewById(R.id.btn);
btn1 = (Button) this.findViewById(R.id.deletebtn);
manager = (NotificationManager) this
.getSystemService(Context.NOTIFICATION_SERVICE);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
send();
}
});
btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
deleteMsg();
}
});
}
/**
*
*/
@SuppressLint("NewApi")
public void send() {
Intent intent = new Intent(Main.this, OtherActivity.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0);
Notification notification = new Notification.Builder(this)
.setAutoCancel(true).setTicker("aaaa")
.setSmallIcon(R.drawable.ic_launcher).setContentTitle("bbbb")
.setContentText("ccccc")
.setDefaults(Notification.DEFAULT_VIBRATE).build();
manager.notify(responseCode, notification);
}
public void deleteMsg() {
manager.cancel(responseCode);
}
}
实现效果：
tips:在实例化Notification.Builder（）实例的时候，必须setSmallIcon()或者setLargerIcon(),否 则notifaction不显示。
