Android 监听系统中消息通知事件

本文主要是介绍Android 监听系统中消息通知事件，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

0. 学习文章

参考了下面Blog 完全没有任何多余的代码

https://blog.csdn.net/wanghang1208/article/details/49905403

原来百度卫士的通知栏收纳是类似这样的原理完成的，很不错.

1.演示结果

数据源头

监听到的log

03-24 14:37:04.264 6155-6155/com.lava.noticeobser D/MyNotificationListenService: onNotificationRemoved
03-24 14:39:19.928 6155-6155/com.lava.noticeobser D/MyNotificationListenService: onNotificationPosted
03-24 14:39:19.928 6155-6155/com.lava.noticeobser I/MyNotificationListenService: notify msg: title=北方多地气温创新高，南方新一轮降雨来袭，详情→ ,when=1521873559186 ,contentTitle=升温幅度明显！ ,contentText=北方多地气温创新高，南方新一轮降雨来袭，详情→ ,contentSubtext=
03-24 14:39:20.235 6155-6155/com.lava.noticeobser D/MyNotificationListenService: onNotificationPosted
03-24 14:39:20.235 6155-6155/com.lava.noticeobser I/MyNotificationListenService: notify msg: title=这些美食无论如何请在开春吃→ ,when=1521873560030 ,contentTitle=错过等一年！ ,contentText=这些美食无论如何请在开春吃→ ,contentSubtext=
03-24 14:39:54.276 6155-6155/com.lava.noticeobser D/MyNotificationListenService: onNotificationPosted
03-24 14:39:54.276 6155-6155/com.lava.noticeobser I/MyNotificationListenService: notify msg: title=正在保存屏幕截图...  ,when=1521873594184 ,contentTitle=正在保存屏幕截图... ,contentText=正在保存屏幕截图。 ,contentSubtext=
03-24 14:39:55.156 6155-6155/com.lava.noticeobser D/MyNotificationListenService: onNotificationPosted
03-24 14:39:55.156 6155-6155/com.lava.noticeobser I/MyNotificationListenService: notify msg: title=正在保存屏幕截图...  ,when=1521873595096 ,contentTitle=已抓取屏幕截图。 ,contentText=点按即可查看您的屏幕截图。 ,contentSubtext=

2.源码

1. MyNotificationListenService 负责监听消息

package com.lava.noticeobser;import android.app.Notification;
import android.os.Build;
import android.os.Bundle;
import android.service.notification.NotificationListenerService;
import android.service.notification.StatusBarNotification;
import android.util.Log;import java.lang.reflect.Field;public class MyNotificationListenService extends NotificationListenerService {private static final String TAG = MyNotificationListenService.class.getSimpleName();@Overridepublic void onNotificationPosted(StatusBarNotification sbn) {super.onNotificationPosted(sbn);Log.d(TAG, "onNotificationPosted");Notification n = sbn.getNotification();if (n == null) {return;}// 标题和时间String title = "";if (n.tickerText != null) {title = n.tickerText.toString();}long when = n.when;// 其它的信息存在一个bundle中，此bundle在android4.3及之前是私有的，需要通过反射来获取；android4.3之后可以直接获取Bundle bundle = null;if (Build.VERSION.SDK_INT == Build.VERSION_CODES.JELLY_BEAN_MR2) {// android 4.3try {Field field = Notification.class.getDeclaredField("extras");bundle = (Bundle) field.get(n);} catch (NoSuchFieldException e) {e.printStackTrace();} catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();}} else if (Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN_MR2) {// android 4.3之后bundle = n.extras;}// 内容标题、内容、副内容String contentTitle = bundle.getString(Notification.EXTRA_TITLE);if (contentTitle == null) {contentTitle = "";}String contentText = bundle.getString(Notification.EXTRA_TEXT);if (contentText == null) {contentText = "";}String contentSubtext = bundle.getString(Notification.EXTRA_SUB_TEXT);if (contentSubtext == null) {contentSubtext = "";}Log.i(TAG, "notify msg: title=" + title + " ,when=" + when+ " ,contentTitle=" + contentTitle + " ,contentText="+ contentText + " ,contentSubtext=" + contentSubtext);}@Overridepublic void onNotificationRemoved(StatusBarNotification sbn) {super.onNotificationRemoved(sbn);Log.d(TAG, "onNotificationRemoved");}
}

1. Mainfest.xml 给 MyNotificationListenService 打辅助

        <service
            android:name=".MyNotificationListenService"android:label="mynotifyservice"android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE" ><intent-filter><action android:name="android.service.notification.NotificationListenerService" /></intent-filter></service>

1. 开启服务

package com.lava.noticeobser;import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);startNotificationListenService();}// 发送通知public void sendNotice(View view) {NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);Notification n;if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB) {// android 3.0之前n = new Notification(R.mipmap.ic_launcher, "title",System.currentTimeMillis());} else {// android 3.0之后n = new Notification.Builder(MainActivity.this).setSmallIcon(R.mipmap.ic_launcher).setTicker("title").setContentTitle("content title").setContentText("content text").setSubText("sub text").setWhen(System.currentTimeMillis()).build();}manager.notify(0, n);}// 跳转服务通知的权限界面public void settingsNotice(View view) {if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {Intent intent = new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS");startActivity(intent);} else {Toast.makeText(MainActivity.this, "手机的系统不支持此功能", Toast.LENGTH_SHORT).show();}}// 启动监听消息通知服务private void startNotificationListenService() {if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {Intent intent = new Intent(MainActivity.this,MyNotificationListenService.class);startService(intent);} else {Toast.makeText(MainActivity.this, "手机的系统不支持此功能", Toast.LENGTH_SHORT).show();}}
}

1. 简单粗暴的布局

<?xml version="1.0" encoding="utf-8"?>
<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"tools:context="com.lava.noticeobser.MainActivity"android:orientation="vertical"><Button
        android:onClick="sendNotice"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="发通知" /><Button
        android:onClick="settingsNotice"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="开启监听权限" />
</LinearLayout>

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