Open the current screen after clicking the notification action button

Question

There are many fragments in the app like fragmentA, fragmentB and fragmentC. When the app is showing fragmentB and a user clicks on the delete button on the notification, a dialog box appears on fragmentB that is working properly but when the app is showing fragmentB and the user puts the app in the background and clicks on the delete button on the notification the dialog box appears on the home screen or on other apps which is on the foreground. In this case, the dialog box should appear on fragmentB (the last opened screen/fragment) and the app should come in the foreground. Please note that this fragmentB is not specific it can be any fragment.

I have written the following code showing notification in fragmentB:

// Create an explicit intent for an activity in this app
val intent = Intent(requireContext(),DialogActivity::class.java)
intent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP
val pendingIntent = PendingIntent.getActivity(requireContext(),0,intent,0)

val deleteIntent = Intent(this,BharosaBroadcastReceiver::class.java)
deleteIntent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP

deleteIntent.apply {
    action = "Delete"
    putExtra("UserId","100")
    putExtra("notificationId",notificationId)
}
val deletePendingIntent = PendingIntent.getBroadcast(this,0,deleteIntent,0)

var btn : Button = findViewById(R.id.btn)

btn.setOnClickListener{
    val contentView = RemoteViews(packageName, R.layout.custom_push)
    contentView.setImageViewResource(R.id.image, R.mipmap.ic_launcher)
    contentView.setTextViewText(R.id.title, "Hello World")
    contentView.setTextViewText(R.id.text, "Please click the delete btton to delete")

    val notificationBuilder = NotificationCompat.Builder(this,channelId)
            .setSmallIcon(R.drawable.ic_action_info)
            .setColor(Color.GREEN)
            .setCustomContentView(contentView)
            .setCustomBigContentView(contentView)
            .setStyle(NotificationCompat.DecoratedCustomViewStyle())                            
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setCategory(NotificationCompat.CATEGORY_MESSAGE)
            .setFullScreenIntent(pendingIntent, true)
            .setOngoing(true)
            contentView.setOnClickPendingIntent(R.id.delete, pendingIntent)
    with(NotificationManagerCompat.from(this)){
        notify(notificationId, notificationBuilder.build())
    }
}

The code of BroadcastReceiver is as follows:

class BharosaBroadcastReceiver(): BroadcastReceiver(){

    companion object {
        var isDeletedClicked = false
    }

override fun onReceive(context: Context?, intent: Intent?) {
    intent?.apply {
        try {
            val notificationId = getIntExtra("notificationId",0)

            var dialog = AlertDialog.Builder(context)
            dialog.setTitle("Hello!")
            dialog.setMessage("Do you want to delete it")
            dialog.setPositiveButton("Delete",
                DialogInterface.OnClickListener { dialog, whichButton ->
                    isDeletedClicked = true
                    context?.apply {
                        // Remove the notification programmatically on button click
                        NotificationManagerCompat.from(this).cancel(notificationId)
                    }
                })

            dialog.setNegativeButton("Don't delete", null)

            var dialogUI = dialog.create();

            dialogUI.setOnShowListener {

                val view = (it as AlertDialog).window
                view?.setBackgroundDrawableResource(R.drawable.alert_dialog_layout)

                // change positive button yes background
                val positiveButton: Button = (it as AlertDialog).getButton(DialogInterface.BUTTON_POSITIVE)

                positiveButton.background = context!!.resources.getDrawable(R.drawable.yes_alert_background)
                positiveButton.setTextColor(context.resources.getColor(R.color.white))

                val negativeButton = it.getButton(DialogInterface.BUTTON_NEGATIVE)
                negativeButton.setTextColor(context.resources.getColor(R.color.dialog_no_text))
            }

            if (Build.VERSION.SDK_INT>26)
                dialogUI.window!!.setType(WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY);
            else
                dialogUI.window!!.setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
            dialogUI.show()

        } catch (ex: Exception) {
            //Log.d(TAG, "$ex")
        }
        }
    }
}

The dialog activity looks like follows from which I need to remove app label (Hello):

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.languageindia.bharosa">

    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/app_icon"
        android:label="Hello"
        android:roundIcon="@drawable/app_icon"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity"
            android:windowSoftInputMode="stateVisible|adjustResize"
            android:screenOrientation="portrait"
            tools:ignore="LockedOrientationActivity">

        </activity>

        <activity android:name=".alert.DialogActivity"
            android:excludeFromRecents="true"
            android:theme="@style/Theme.AppCompat.Dialog"/>

        <activity android:name=".SplashScreen"
            android:theme="@style/Theme.AppCompat.Light.NoActionBar"
            android:screenOrientation="portrait"
            tools:ignore="LockedOrientationActivity">
            <intent-filter android:label="@string/launcher_name">
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

DialogActivity.kt

class DialogActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_dialog)
        this.setFinishOnTouchOutside(true)

        var btnOk : Button = findViewById(R.id.btnOk)

        btnOk.setOnClickListener {
            finish()
        }
    }
}

activity_dialog.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#0072ff"
    android:gravity="center"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical">

        <TextView
            android:id="@+id/txtTitle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:paddingTop="20dp"
            android:paddingBottom="20dp"
            android:text="Download"
            android:textColorHint="#FFF" />

        <View
            android:id="@+id/viewDivider"
            android:layout_width="match_parent"
            android:layout_height="2dp"
            android:background="#fff"
            android:backgroundTint="@color/white"
            app:layout_constraintBottom_toBottomOf="@id/txtTitle" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:paddingTop="20dp"
            android:paddingBottom="20dp"
            android:text="Your file is download"
            android:textColorHint="#FFF" />


        <Button
            android:id="@+id/btnOk"
            android:layout_width="100dp"
            android:layout_height="40dp"
            android:layout_marginBottom="20dp"
            android:text="Ok"
            android:textAllCaps="false" />
    </LinearLayout>

</LinearLayout>

I searched on the internet but I did not get any solution. Please help me

Answer 1

Why are you using a BroadcastReceiver instead of an Activity for this purpose?

It would be better to launch an Activity in your app to show this "delete" dialog. This will bring your app to the foreground (in whatever state it was in) and launch the new Activity on top of that. You can show your dialog and when the dialog is complete you can finish() the Activity and drop the user back into your app in whatever state it was in.

If you only want the dialog to show up, you can either use a transparent Activity to host it, or you can use a dialog-themed Activity (an Activity that looks like a dialog) for this purpose.