Notification(一)

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activity_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="com.example.notification.MainActivity" >    <Button        android:id="@+id/button"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:layout_marginLeft="57dp"        android:layout_marginTop="51dp"        android:text="创建一个提示" /></RelativeLayout>

MainActivity

package com.example.notification;import android.app.Activity;import android.app.Notification;import android.app.NotificationManager;import android.content.Context;import android.os.Bundle;import android.support.v4.app.NotificationCompat;import android.support.v4.app.NotificationCompat.Builder;import android.view.View;import android.widget.Button;public class MainActivity extends Activity {public static final int NOTIFICATION_ID = 1200;private Button button;private int count;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button = (Button) findViewById(R.id.button);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {count++;//import android.support.v4.app.NotificationCompatBuilder builder = new NotificationCompat.Builder(MainActivity.this);builder.setSmallIcon(R.drawable.ic_launcher);builder.setContentTitle("有" + count + "个未读消息");builder.setContentText("你好，我叫wyf");//创建即可Notification notification = builder.build();NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);//管理器更新通知manager.notify(NOTIFICATION_ID, notification);}});}}

**************************************************添加意图*****************************

布局文件有2个button--发送通知、取消通知

package com.imooc.notificationdemo;import android.annotation.SuppressLint;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.View;import android.view.View.OnClickListener;public class MainActivity extends Activity implements OnClickListener {// 通知控制类private NotificationManager manager;// 通知的id值private int notification_ID;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 获取通知的管理类对象manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);//获取控件，添加点击事件findViewById(R.id.btn_send).setOnClickListener(this);findViewById(R.id.btn_cancle).setOnClickListener(this);}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.btn_send:sendNotification();break;case R.id.btn_cancle:manager.cancel(notification_ID);break;}}/** * 构造notification并发送到通知栏 */@SuppressLint("NewApi")private void sendNotification() {/** * intent英文意思是意图，pending表示即将发生或来临的事情。 * PendingIntent这个类用于处理即将发生的事情。比如在通知Notification中用于跳转页面，但不是马上跳转。 */Intent intent = new Intent(this, MainActivity.class);PendingIntent pintent = PendingIntent.getActivity(this, 0, intent, 0);// 创建builder，设置各种参数信息Builder builder = new Notification.Builder(this);builder.setSmallIcon(R.drawable.ic_launcher);// 设置图标builder.setTicker("hello");// 手机状态栏的提示；builder.setWhen(System.currentTimeMillis());// 设置时间builder.setContentTitle("通知栏通知");// 设置标题builder.setContentText("我来自NotificationDemo");// 设置通知内容builder.setDefaults(Notification.DEFAULT_SOUND);// 设置提示声音builder.setDefaults(Notification.DEFAULT_ALL);// 设置震动builder.setContentIntent(pintent);// 点击后的意图Notification notification = builder.build();// 4.1以上manager.notify(notification_ID, notification);}}

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