Clicking on Notification Is Not Starting Intended Activity

Clicking on Notification is not starting intended activity?

My problem got solved I just have to add PendingIntent.FLAG_ONE_SHOT flag as well , so I replaced :

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

to

PendingIntent contentIntent = stackBuilder
                .getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT
                        | PendingIntent.FLAG_ONE_SHOT);

Notification is not opening Activity onClick

First you need to declare an Intent like:

Intent notificationClickIntent = new Intent("intent_id")

Then you need to declare a Pending Intent like this:

PendingIntent pendingIntent = PendingIntent.getActivity(context, REQUEST_CODE, notificationClickIntent, PendingIntent.FLAG_UPDATE_CURRENT);

In your notification builder add set contentIntent:

NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID)
                .setSmallIcon(R.drawable.ic_notification)
                .setContentTitle(notificationData.getTitle())
                .setContentText(notificationData.getBody())
                .setPriority(NotificationCompat.PRIORITY_HIGH)
                **.setContentIntent(notificationClickPendingIntent)**
                .addAction(R.drawable.ic_notification, context.getString(R.string.turn_on_alarms), notificationButtonClickPendingIntent)
                .setAutoCancel(true)

In your manifest declare an intent filter on the activity you want to open (as I remember I could not make it work for the launcher activity, maybe it can work, I just gave up).

<activity
        android:name="Activity_name"
        android:launchMode="singleTask"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar.LightStatusBar">
        <intent-filter>
            <action android:name="intent_id" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>

And last but not least, if activity hasn't been opened, notification onClick will trigger the onCreate method, if it has been opened, it will trigger the onNewIntent

hope this helps :)

android How to start activity when user clicks a notification?

Here is my final solution:

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(YourService.this)
            .setContentTitle(getResources().getText(R.string.app_name))
            .setContentText(getServiceStateDescription(HomeBridgeService.this))
            .setSmallIcon(iconId)
            .setWhen(System.currentTimeMillis());

    Intent nIntent = getPreviousIntent();
    TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
    // Adds the back stack
    stackBuilder.addParentStack(MainActivity_.class);
    stackBuilder.addNextIntent(nIntent);
    PendingIntent pendingIntent =
            stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
    notificationBuilder.setContentIntent(pendingIntent);

    startForeground(ContextConstants.LAUNCHER_SERVICE_NOTE_ID, notificationBuilder.build());

private Intent getPreviousIntent() {
    Intent newIntent = null;
    final ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        final List<ActivityManager.AppTask> recentTaskInfos = activityManager.getAppTasks();
        if (!recentTaskInfos.isEmpty()) {
            for (ActivityManager.AppTask appTaskTaskInfo: recentTaskInfos) {
                if (appTaskTaskInfo.getTaskInfo().baseIntent.getComponent().getPackageName().equals(ContextConstants.PACKAGE_NAME)) {
                    newIntent = appTaskTaskInfo.getTaskInfo().baseIntent;
                    newIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                }
            }
        }
    } else {
        final List<ActivityManager.RecentTaskInfo> recentTaskInfos = activityManager.getRecentTasks(1024, 0);
        if (!recentTaskInfos.isEmpty()) {
            for (ActivityManager.RecentTaskInfo recentTaskInfo: recentTaskInfos) {
                if (recentTaskInfo.baseIntent.getComponent().getPackageName().equals(ContextConstants.PACKAGE_NAME)) {
                    newIntent = recentTaskInfo.baseIntent;
                    newIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                }
            }
        }
    }
    if (newIntent == null) newIntent = new Intent();
    return newIntent;
}

FCM notification not opening intended activity Android

Extending #Sudip Podder comments and #Ratilal Chopda answer
Follow these steps:

Step1:

<activity android:name=".SplashActivity">
        <intent-filter>
            <action android:name=".SplashActivity" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>

Step2:

I am using php at server so you need to adjust things the way you like but in notification payload add "click_action" : ".SplashActivity"

 $fields = array(
            'to' => $token,
            'notification' => array(
                'title' => 'Motors City',
                'body' => $message,
                "click_action" => ".AppSplash",

            ),
            'data' => array(
                'sec_id' => $secID,
                'sec' => $sec,
                'extra1'=>$extra1,
                'extra2'=>$extra2
            )
        );

        $headers = array(
            'Authorization:key=' . $server_key,
            'Content-Type:application/json'
        );

Step3:
In Oncreate of your SplashActivity

Bundle bundle = getIntent().getExtras();
if (bundle != null) {
  Log.d(TAG,bundle.toString);
}}

and you are done

FCM not opening activity again when app opened by clicking notification

OP's solution:

i.setPackage(null);
        i.setFlags(Intent.FLAG_FROM_BACKGROUND | Intent.FLAG_RECEIVER_NO_ABORT );
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, i,
        PendingIntent.FLAG_UPDATE_CURRENT | 
        PendingIntent.FLAG_ONE_SHOT | 
        PendingIntent.FLAG_IMMUTABLE);

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