如何阻止单个活动弹出通知?

Question

所以我正在构建一个应用程序，有一个活动(MainActivity)和使用片段来运行应用程序。

我有一个通知，在MainActivity中被称为

当我点击通知时，它会带我到一个特定的片段。

我遇到的问题是，每次我点击通知总是显示通知。如何阻止此通知弹出?

这是我的MainActivity

package com.main.netwallet
import android.app.NotificationChannel
import android.app.NotificationManager
import android.app.PendingIntent
import android.content.Context
import android.content.Intent
import android.content.SharedPreferences
import android.os.Build
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.view.Menu
import android.view.MenuItem
import android.view.View
import androidx.core.app.NotificationCompat
import androidx.core.app.NotificationManagerCompat
import androidx.databinding.DataBindingUtil
import androidx.drawerlayout.widget.DrawerLayout
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentManager
import androidx.fragment.app.FragmentTransaction
import androidx.lifecycle.Observer
import androidx.lifecycle.ViewModelProvider
import androidx.navigation.findNavController
import androidx.navigation.ui.NavigationUI
import androidx.navigation.ui.setupWithNavController
import com.google.android.material.bottomnavigation.BottomNavigationView
import com.google.android.material.floatingactionbutton.FloatingActionButton
import com.google.android.material.navigation.NavigationView
import com.main.netwallet.addTransaction.AddTransactionFragment
import com.main.netwallet.database.NetWalletDatabase
import com.main.netwallet.databinding.FragmentReminderBinding
import com.main.netwallet.initialSetting.AddNewAccountFragment
import com.main.netwallet.reminder.ReminderFragementViewModel
import com.main.netwallet.reminder.ReminderFragementViewModelFactory
import java.text.SimpleDateFormat
import java.util.*

class MainActivity : AppCompatActivity() {
val PREF_KEY_EMAIL = "email preference"
lateinit var sharedPreferenceEmail : SharedPreferences
private lateinit var drawerID : DrawerLayout
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val navController = this.findNavController(R.id.navHostFragment)

//add bottomNavigation
val bottomNavigationView = findViewById<BottomNavigationView>(R.id.bn_main)
val fab = findViewById<FloatingActionButton>(R.id.fab)
fab.setOnClickListener {
findNavController(R.id.navHostFragment).navigate(R.id.addTransactionFragment)
}
bottomNavigationView.setOnItemSelectedListener(mOnNavigationItemSelectedListener)
/**
* These lines of codes below to check destination changed
*/
navController.addOnDestinationChangedListener { _, destination, _ ->
if(destination.id == R.id.loginFragment){
bottomNavigationView.visibility = View.GONE
fab.visibility = View.GONE
}else if(destination.id == R.id.registerFragment){
bottomNavigationView.visibility = View.GONE
fab.visibility = View.GONE
}else if(destination.id == R.id.initialSettingFragment) {
bottomNavigationView.visibility = View.GONE
fab.visibility = View.GONE
}else if(destination.id == R.id.addTransactionFragment){
fab.visibility = View.GONE
}else{
bottomNavigationView.visibility = View.VISIBLE
fab.visibility = View.VISIBLE
}
}
sharedPreferenceEmail = getSharedPreferences(PREF_KEY_EMAIL, Context.MODE_PRIVATE)
val getEmail = sharedPreferenceEmail.getString("email_preference", null)
val application = requireNotNull(this).application
val dataSource = NetWalletDatabase.getInstance(application).netWalletDatabaseDao
val viewModelProvider = ReminderFragementViewModelFactory(dataSource, application, getEmail.toString())
val viewModel = ViewModelProvider(this, viewModelProvider).get(ReminderFragementViewModel::class.java)
viewModel.getReminderDate.observe(this, Observer { list->
list?.let {
for (i in 0..list.size -1) {
if (i >= 0){
val getReminderDate = list.get(0).getReminderDate
val todayDate: String =
SimpleDateFormat("dd/MM/yyyy", Locale.getDefault()).format(Date())
val compare = getReminderDate.equals(todayDate)
if (getReminderDate == todayDate) {
notif()
Log.e("Notif", getReminderDate)
Log.e("Notif", todayDate)
Log.e("Notif", compare.toString())
}
}
}
}
})
val toNotifFragment = intent.getStringExtra("toNotifFragment")
if (toNotifFragment.equals("NotifFragment")){
findNavController(R.id.navHostFragment).navigate(R.id.transactionNotificationFragment)
}
Log.e("Activity", "Main Activity")
}
private val mOnNavigationItemSelectedListener = BottomNavigationView.OnNavigationItemSelectedListener { menuItem ->
when(menuItem.itemId){
R.id.logout -> {
val intent = Intent(this, LogoutActivity::class.java)
startActivity(intent)
return@OnNavigationItemSelectedListener true
}
R.id.account ->{
findNavController(R.id.navHostFragment).navigate(R.id.accountFragment)
return@OnNavigationItemSelectedListener true
}
R.id.homeBottom ->{
findNavController(R.id.navHostFragment).navigate(R.id.homeFragment)
return@OnNavigationItemSelectedListener true
}
R.id.settingBottom ->{
findNavController(R.id.navHostFragment).navigate(R.id.settingsFragment)
return@OnNavigationItemSelectedListener true
}
else -> false
}
}
fun notif(){
createNotificationChannel()
val intent = Intent(this, MainActivity::class.java)
.putExtra("toNotifFragment", "NotifFragment")
.apply {
flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
}
val pendingIntent : PendingIntent = PendingIntent.getActivity(this,0, intent, 0)
var notifBuilder = NotificationCompat.Builder(this, "CHANNEL_ID")
.setSmallIcon(R.drawable.ic_baseline_notifications_24)
.setContentTitle("Test Notification")
.setContentText("This is sample notification")
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setContentIntent(pendingIntent)
.setAutoCancel(true)
.build()
with(NotificationManagerCompat.from(this)){
notify(1, notifBuilder)
}
}
private fun createNotificationChannel(){
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("CHANNEL_ID",name,importance).apply {
description = descriptionText
}
val notificationManager : NotificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
notificationManager.createNotificationChannel(channel)
}
}
}

我很确定的解决方案是创建一个响应通知点击的活动。但是在我这样做之前，我想知道是否有办法将它保持在单个活动

Answer 1

你要找的是显示通知时，活动是而不是仅通过声明为通知ContentIntent的待定意图打开。这可以通过将notif()方法调用移动到if子句的else语句中轻松实现:

setContentView(R.layout.activity_main)
val toNotifFragment = intent.getStringExtra("toNotifFragment")
if (toNotifFragment.equals("NotifFragment")) {
findNavController(R.id.navHostFragment).navigate(R.id.transactionNotificationFragment)
} else notif()