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[英]Android ViewModel recreated when launching activity from notification intent
[英]Android - Launching Activity from Notification
我正在编写一个时间跟踪器应用程序,它启动一个未绑定的前台服务,以让用户了解经过的时间。 该服务运行顺利,一切都像一个魅力......除了一件事。 当用户点击通知时,应用程序的主要活动应该开始。 根据 Androids 文档( https://developer.android.com/training/notify-user/navigation )此代码应该可以工作,但它只是启动应用程序的设置 Activity 的 ZE84E30B9390CDB64DB6DB2C9AB87846D。
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
Log.d(TAG, "Started")
isRunning = true
val channelID = createNotificationChannel()
val pendingIntent: PendingIntent = Intent(this, MainActivity::class.java).let { notificationIntent ->
PendingIntent.getActivity(this, 0, notificationIntent, FLAG_UPDATE_CURRENT)
}
val notification: Notification = NotificationCompat.Builder(this, channelID)
.setContentTitle(CHANNEL_NAME)
.setContentText("My wonderful Text")
.setPriority(PRIORITY_LOW)
.setContentIntent(pendingIntent)
.build()
startForeground(FOREGROUND_ID, notification)
timer.scheduleAtFixedRate(TimedTask(), 0, 1000)
return super.onStartCommand(intent, flags, startId)
}
private fun createNotificationChannel(): String{
val chan = NotificationChannel(CHANNEL_ID,
CHANNEL_NAME, NotificationManager.IMPORTANCE_NONE)
chan.lightColor = Color.BLUE
chan.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
val service = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
service.createNotificationChannel(chan)
return CHANNEL_ID
}
manifest.xml 看起来像这样:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.maybe.tima">
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name=".TimerService"
android:label="@string/app_name"
/>
</application>
</manifest>
任何想法为什么会发生这种情况? 非常感谢您的帮助:)
我为使您的代码正常工作所做的唯一更改是在您的 notificationBulider 中添加方法“setSmallIcon”(但我在官方文档中找不到任何关于这种方法的这种影响的提及):
val notification: Notification = NotificationCompat.Builder(this, channelID)
.setContentTitle(CHANNEL_NAME)
.setContentText("My wonderful Text")
.setPriority(PRIORITY_LOW)
.setSmallIcon(R.drawable.ic_launcher_background) // line added
.setContentIntent(pendingIntent)
.build()
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