根据时间发送通知 Android [英] Send Notification based on time Android

问题描述

我是 Android 开发新手，我需要根据 2 种情况发送通知:

1. 使用showNotification"方法点击showNotification"按钮
2. 一段时间后(在我的示例中单击alertNotification"按钮后 5 秒)使用alertNotification"方法如下:

第一个案例效果很好.但是，我遇到了第二种情况的问题.

我遵循了在 https://youtu.be/gm5n_hRIR-c 上解释的相同方法

这是我的代码:

1. MainActivity.java

   public class MainActivity extends Activity {//点击按钮时发送通知按钮显示通知；//点击按钮后 5 秒发送通知按钮警报通知；通知管理器通知管理器；boolean isNotificActive = false;int 通知 ID = 33;public static final int NOTIFICATION_ID = 1;public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.sample_layout);showNotification = (Button) findViewById(R.id.showNotification);alertNotification = (Button) findViewById(R.id.alerNotification);}public void showNotification(查看视图){NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this).setContentTitle("通知").setContentText("新通知").setTicker("提醒新通知").setSmallIcon(R.drawable.ic_stat_notification);Intent moreInfoIntent = new Intent(this, MoreNotification.class);TaskStackBuilder stackBuilder = null;如果 (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {stackBuilder = TaskStackBuilder.create(this);stackBuilder.addParentStack(MoreNotification.class);stackBuilder.addNextIntent(moreInfoIntent);PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);notificationBuilder.setContentIntent(pendingIntent);NotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);notificationManager.notify(notifID, notificationBuilder.build());isNotificActive = true;}}公共无效警报通知(查看视图){Long alertTime = new GregorianCalendar().getTimeInMillis()+5*1000;意图 alertIntent = new Intent(this, AlertReceiver.class);AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);警报管理器.设置(警报管理器.RTC_WAKEUP，警报时间，PendingIntent.getBroadcast(this, 1, alertIntent, PendingIntent.FLAG_UPDATE_CURRENT));Log.e("alarmManager", "alarmManager");}}

2. AlertReceiver.java

   public class AlertReceiver extends BroadcastReceiver {@覆盖public void onReceive(上下文上下文，意图意图){Log.e("onReceive", "onReceive");createNotification(context, "Times UP", "5 Seconds Has Passed", "Alert");}公共无效创建通知(上下文上下文，字符串味精，字符串味精文本，字符串味精警报){PendingIntent notificationIntent = PendingIntent.getActivity(context, 0,新意图(上下文，MainActivity.class)，0)；NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context).setSmallIcon(R.drawable.ic_stat_notification).setContentTitle(味精).setTicker(msgAlert).setContentText(msgText);mBuilder.setContentIntent(notificationIntent);mBuilder.setDefaults(NotificationCompat.DEFAULT_SOUND);mBuilder.setAutoCancel(true);NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);mNotificationManager.notify(1, mBuilder.build());}}

3. AndroidManifest.xml

   <uses-permission android:name="com.android.alarm.permission.SET_ALARM"/><申请机器人:allowBackup =真"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme"><活动android:name=".MainActivity"android:label="@string/app_name"><意图过滤器><action android:name="android.intent.action.MAIN"/><category android:name="android.intent.category.LAUNCHER"/></意图过滤器></活动><活动android:name=".MoreNotification"android:label="更多通知"android:parentActivityName=".MainActivity"><元数据android:name="android.support.PARENT_ACTIVITY"android:value=".MainActivity"/></活动></应用程序>

解决方案

AlertReceiver 必须在 AndroidManifest.xml 中注册.

<应用程序机器人:allowBackup =真"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme"><!-- 你的东西在这里.--><receiver android:name=".AlertReceiver"/></应用程序>

I am new to Android development, and I need to send a notification based on 2 cases:

1. On "showNotification" Button Click using "showNotification" Method
2. After a period of time (5 seconds after "alertNotification" button clicked in my example) using "alertNotification" method as below:

The first case has worked perfect. But, I am having a problem with the Second case.

I followed the same way explained on https://youtu.be/gm5n_hRIR-c

Here are my Code:

1. MainActivity.java

   public class MainActivity extends Activity {
       // Send Notification on button click
       Button showNotification;
       // Send Notification 5 second after on button click
       Button alertNotification;
       NotificationManager notificationManager;
       boolean isNotificActive = false;
   
       int notifID = 33;
   
       public static final int NOTIFICATION_ID = 1;
   
       public void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.sample_layout);
   
           showNotification = (Button) findViewById(R.id.showNotification);
           alertNotification = (Button) findViewById(R.id.alerNotification);
       }
   
       public void showNotification(View view) {
           NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                   .setContentTitle("Notification")
                   .setContentText("New Notification")
                   .setTicker("Alert New Notification")
                   .setSmallIcon(R.drawable.ic_stat_notification);
   
           Intent moreInfoIntent = new Intent(this, MoreNotification.class);
           TaskStackBuilder stackBuilder = null;
           if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
               stackBuilder = TaskStackBuilder.create(this);
   
               stackBuilder.addParentStack(MoreNotification.class);
               stackBuilder.addNextIntent(moreInfoIntent);
   
               PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.    FLAG_UPDATE_CURRENT);
   
               notificationBuilder.setContentIntent(pendingIntent);
   
               notificationManager = (NotificationManager) getSystemService(Context.    NOTIFICATION_SERVICE);
   
               notificationManager.notify(notifID, notificationBuilder.build());
   
               isNotificActive = true;
           }
       }
   
       public void alertNotification(View view) {
           Long alertTime = new GregorianCalendar().getTimeInMillis()+5*1000;
           Intent alertIntent = new Intent(this, AlertReceiver.class);
   
           AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
   
           alarmManager.set(AlarmManager.RTC_WAKEUP, alertTime, PendingIntent.getBroadcast(
                   this, 1, alertIntent, PendingIntent.FLAG_UPDATE_CURRENT));
   
           Log.e("alarmManager", "alarmManager");
       }
   }
   

2. AlertReceiver.java

   public class AlertReceiver extends BroadcastReceiver {
       @Override
       public void onReceive(Context context, Intent intent) {
           Log.e("onReceive", "onReceive");
           createNotification(context, "Times UP", "5 Seconds Has Passed", "Alert");
       }
   
       public void createNotification(Context context, String msg, String msgText, String msgAlert) {
           PendingIntent notificationIntent = PendingIntent.getActivity(context, 0,
                   new Intent(context, MainActivity.class), 0);
   
           NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
                   .setSmallIcon(R.drawable.ic_stat_notification)
                   .setContentTitle(msg)
                   .setTicker(msgAlert)
                   .setContentText(msgText);
   
           mBuilder.setContentIntent(notificationIntent);
           mBuilder.setDefaults(NotificationCompat.DEFAULT_SOUND);
           mBuilder.setAutoCancel(true);
   
           NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(      Context.NOTIFICATION_SERVICE);
   
           mNotificationManager.notify(1, mBuilder.build()); 
       }
   }
   

3. AndroidManifest.xml

   <!-- Min/target SDK versions (<uses-sdk>) managed by build.gradle -->
   
   <uses-permission android:name="com.android.alarm.permission.SET_ALARM" />
   
   <application
       android:allowBackup="true"
       android:icon="@drawable/ic_launcher"
       android:label="@string/app_name"
       android:theme="@style/AppTheme">
       <activity
           android:name=".MainActivity"
           android:label="@string/app_name">
           <intent-filter>
               <action android:name="android.intent.action.MAIN" />
   
               <category android:name="android.intent.category.LAUNCHER" />
           </intent-filter>
       </activity>
   
       <activity
           android:name=".MoreNotification"
           android:label="More Notification"
           android:parentActivityName=".MainActivity">
           <meta-data
               android:name="android.support.PARENT_ACTIVITY"
               android:value=".MainActivity"/>
   
   
       </activity>
   </application>
   

解决方案

AlertReceiver must be registered in AndroidManifest.xml.

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme">

    <!-- Your stuff here. -->

    <receiver android:name=".AlertReceiver"/>

</application>

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