Intent cant receive data in android

Question

I want to send data from intent if my intent is null then simple open my main activity. This is my tryout but its not work for me.

From one activity to send

intent = new Intent(this, MainActivity.class);
        intent.putExtra("androidkey",body);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

and receive time

 String uid;
    Intent intent = getIntent();
 uid = intent.getStringExtra("androidkey");

Oncreate method of main activity

 if (uid.equals("hello")){
            startActivity(new Intent(MainActivity.this, About.class));

        }else if (uid.equals("")||uid.equals(null)){

            startActivity(new Intent(MainActivity.this, MainActivity.class));
        }

Please tell me the solution for this because its crash my application.

what actually i want to do in my code is

 @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {


        if(remoteMessage.getData().size() > 0) {
            Log.d(TAG, "Message data: " + remoteMessage.getData());
            sendNotification(remoteMessage.getData().get("message"));


        }

        //Check if the message contains notification

        if(remoteMessage.getNotification() != null) {
            Log.d(TAG, "Mesage body:" + remoteMessage.getNotification().getBody());
            sendNotification(remoteMessage.getNotification().getBody());
        }
    }

    private void sendNotification(String body) {
 if (body.equals("Image Upload Successfully")){
            intent= new Intent(this, Image_Gallery.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        }else if (body.equals("Video Upload Successfully")){

            intent = new Intent(this, Video_Gallary.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        }else if (body.equals("Home Work Are Uploaded")){

            intent = new Intent(this, HomeWork.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        }

when my app is in foreground and notification arrived its open perfect page but when application is not in foreground it's open Mainactivity

so please tell me what should i can do for that..?

Please post logcat error. It help everyone to found the issue. — Chirag, Jul 03 '17 at 11:14
Do not decide which activity to load in MainActivity, when it is already started, but before creating the intent. If you have any android key, start the About_School activity and if not..start the main. So...decide which activity to load at the place where you create the Intent, not in the resulting activity. — JacksOnF1re, Jul 03 '17 at 11:15
Attempt to invoke virtual method 'java.lang.String android.content.Intent.getStringExtra(java.lang.String)' on a null object reference — mayank gajjar, Jul 03 '17 at 11:16
Possible duplicate of [Notification to activity](https://stackoverflow.com/questions/44793746/notification-to-activity) — JacksOnF1re, Jul 03 '17 at 11:59

Sunisha Guptan · Answer 1 · 2017-07-03T11:56:46.653

0

Sending activity,

    Intent newActivity1 = new Intent(ActivityA.this, ActivityB.class);
newActivity1.putExtra("androidkey", body);
startActivity(newActivity1);

Receiving Activity,

 String value = getIntent().getExtras().getString("androidkey");

Or,

    Bundle extras = getIntent().getExtras(); 
String uid;

if (extras != null) {
    uid= extras.getString("androidkey");

}

For firebase try something like this,

public void onMessageReceived(String from, Bundle data) {
        Bundle bundle = data.getBundle("notification");

                if (bundle != null) {
                   String text = bundle.getString("text");
                    String body = bundle.getString("body");
    }
}

or,

public void onMessageReceived(RemoteMessage remoteMessage)
    {
        Log.e("dataMessage",remoteMessage.getData().toString());
        try
        {
            Map<String, String> params = remoteMessage.getData();
            JSONObject object = new JSONObject(params);
            Log.e("JSON_OBJECT", object.toString());
      }
   }

edited Jul 03 '17 at 11:56

answered Jul 03 '17 at 11:15

Sunisha Guptan

1,555
17
44

actually i want to implement in MyFirebaseMessagingService – mayank gajjar Jul 03 '17 at 11:19
so when some message receive then open particular activity but its not works for me. – mayank gajjar Jul 03 '17 at 11:20
Oh okay you didn't mention that in your question – Sunisha Guptan Jul 03 '17 at 11:21
try this, https://stackoverflow.com/questions/40181654/firebase-fcm-open-activity-and-pass-data-on-notification-click-android – Sunisha Guptan Jul 03 '17 at 11:22
please check this URL and its my question but its not works then i will try for this – mayank gajjar Jul 03 '17 at 11:30
i have edited my answer,please check what that text and body comes,please log it and let me know – Sunisha Guptan Jul 03 '17 at 11:33
check my answer,also log this one also, Log.d("Bundle123::", bundle + ""); – Sunisha Guptan Jul 03 '17 at 11:37
Attempt to invoke virtual method 'java.lang.String android.content.Intent.getStringExtra(java.lang.String)' on a null object reference @sunisha sindhu – mayank gajjar Jul 03 '17 at 11:55
i have edited my answer check with it,and tell me what that dataMessage value getting – Sunisha Guptan Jul 03 '17 at 11:57

score 0 · Answer 2 · answered Jul 03 '17 at 11:20

0

Okay, because a comment only may be to meaningless.

Do not decide where to go, in one of your activities, but at the place where you create the intent.

Like this:

Intent startIntent;
if(body == null || body.isEmpty()){
    startIntent = new Intent(context, MainActivity.class);
}else{
    startIntent = new Intent(context, About.class);
    startIntent.putExtra("androidkey",body);
}

startIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(startIntent);

answered Jul 03 '17 at 11:20

JacksOnF1re

3,336
24
55

Please tell me why or I can't help you. – JacksOnF1re Jul 03 '17 at 11:26
actually i want to implement in MyFirebaseMessagingService – mayank gajjar Jul 03 '17 at 11:26
so when some message receive then open particular activity but its not works for me. – mayank gajjar Jul 03 '17 at 11:27
So..you have a service where you receive the firebase cloud messages correct? Therefor in this service, start the correct activity, with the given key as bove. – JacksOnF1re Jul 03 '17 at 11:31
please check this what actually i want to implement but its not work for me then i will try this – mayank gajjar Jul 03 '17 at 11:33
Ok, instead of creating a new question, you should consider improving the old one and get answers there. – JacksOnF1re Jul 03 '17 at 11:35

Intent cant receive data in android

2 Answers2