我正在开发一个需要关闭的嵌入式应用程序之一，如果我通过代码隐藏了应用程序的图标，那么当我单击系统灰色通知启动它时，不会调用applicaton。

我已经尝试在示例应用程序中对此进行模拟，但它甚至在这里也无法正常工作。没有启动器图标的Google for Apps是否有限制，不能从通知中调用？

我的Applicaiton类代码：

class MainApplication : Application() {


override fun onCreate() {
    super.onCreate()
    hideAppIcon()
    showNotification()

}

private fun hideAppIcon() {
    val p = packageManager
    val componentName = ComponentName(
        this,com.icon.notification.rel.Mainactivity::class.java
    ) // activity which is first time open in manifiest file which is declare as <category android:name="android.intent.category.LAUNCHER" />
    p.setComponentEnabledSetting(
        componentName,PackageManager.COMPONENT_ENABLED_STATE_DISABLED,PackageManager.DONT_KILL_APP
    )
}

private fun showNotification(){

    // Create the NotificationChannel,but only on API 26+ because
    // the NotificationChannel class is new and not in the support library
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        val name = getString(R.string.channel_name)
        val descriptionText = getString(R.string.channel_description)
        val importance = Notificationmanager.IMPORTANCE_DEFAULT
        val channel = NotificationChannel("local_notification",name,importance).apply {
            description = descriptionText
        }
        // Register the channel with the system
        val notificationmanager: Notificationmanager =
            getSystemService(Context.NOTIFICATION_SERVICE) as Notificationmanager
        notificationmanager.createNotificationChannel(channel)



        // Create an explicit intent for an activity in your app
        val intent = Intent(this,Mainactivity::class.java).apply {
            flags = Intent.flaG_actIVITY_NEW_TASK or Intent.flaG_actIVITY_CLEAR_TASK
        }
        val pendingIntent: PendingIntent = PendingIntent.getactivity(this,intent,0)

        val builder = NotificationCompat.Builder(this,"local_notification")
            .setSmallIcon(android.R.drawable.ic_dialog_email)//@android:drawable/ic_dialog_email
            .setContentTitle("My notification")
            .setContentText("Hello World!")
            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
            // Set the intent that will fire when the user taps the notification
            .setContentIntent(pendingIntent)
            .setautoCancel(true)


        with(NotificationmanagerCompat.from(this)) {
            // notificationId is a unique int for each notification that you must define
            notify(1000000001,builder.build())
        }
    }
}

}

我的活动代码：

class Mainactivity : AppCompatactivity() {

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    setSupportactionBar(toolbar)

    fab.setOnClicklistener { view ->
        this.finish()
    }
}

override fun onCreateOptionsMenu(menu: Menu): Boolean {
    // Inflate the menu; this adds items to the action bar if it is present.
    menuInflater.inflate(R.menu.menu_main,menu)
    return true
}

override fun onOptionsItemSelected(item: MenuItem): Boolean {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button,so long
    // as you specify a parent activity in AndroidManifest.xml.
    return when (item.itemId) {
        R.id.action_settings -> true
        else -> super.onOptionsItemSelected(item)
    }
}

}

我的清单：

<?xml version="1.0" encoding="utf-8"?>

<application
    android:name=".MainApplication"
    android:allowBackup="true"
    android:theme="@style/Apptheme">
    <activity

        android:name=".Mainactivity"
        android:theme="@style/Apptheme.NoactionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>