Get back to previous Activity when Ongoing notification is clicked

Question

I'm having an activity with some EditTexts and an Ongoing Notification.

After filling into EditTexts, I come back Home screen by pressing Home button (my app is running in background). All I want is to come back my activity with filled EditTexts (not to create a new one) when I click the Ongoing Notification.

I have tried this

How should i do from notification back to activity without new intent

And this

Notification click: activity already open

They don't work at all !!!

Below is my code snippet

ProtocolMonitorActivity.java

    Intent resultIntent = new Intent(this, ProtocolMonitorActivity.class);

    TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
    stackBuilder.addParentStack(ProtocolMonitorActivity.class);
    stackBuilder.addNextIntent(resultIntent);

    PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
            PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder notiBuilder = new NotificationCompat.Builder(
            this).setSmallIcon(R.drawable.noti_icon)
            .setContentTitle("Protocol Monitor App")
            .setContentText("Service is running")
            .setOngoing(true);
    notiBuilder.setContentIntent(resultPendingIntent);

    notiManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    notiManager.notify(notiId, notiBuilder.build());

Manifest

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

    <activity
        android:name=".ProtocolMonitorActivity"
        android:label="@string/app_name"
        android:process="com.android.phone"
        android:launchMode="singleTop"
        android:screenOrientation="portrait" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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

        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".ProtocolMonitorActivity" />

    </activity>
</application>

Does someone have any idea on this?

Thank you so so much!!!

Answer 1

You cannot do this using TaskStackBuilder. The behaviour of TaskStackBuilder is that it always clears the task (recreating any activites).

You just need a "launch Intent" to bring your task to the foreground in whatever state it happens to be in. There's 2 ways to do this:

Varient 1:

final Intent notificationIntent = new Intent(this, ProtocolMonitorActivity.class);
notificationIntent.setAction(Intent.ACTION_MAIN);
notificationIntent.addCategory(Intent.CATEGORY_LAUNCHER);
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Variant 2:

final Intent notificationIntent = 
        PackageManager.getLaunchIntentForPackage(getPackageName());

Then do:

PendingIntent resultPendingIntent = PendingIntent.getActivity(this, 0,
        notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

NotificationCompat.Builder notiBuilder = new NotificationCompat.Builder(
        this).setSmallIcon(R.drawable.noti_icon)
        .setContentTitle("Protocol Monitor App")
        .setContentText("Service is running")
        .setOngoing(true);
notiBuilder.setContentIntent(resultPendingIntent);

notiManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notiManager.notify(notiId, notiBuilder.build());

Answer 2

Just insert this line

resultIntent.setAction(Intent.ACTION_MAIN);