How to start activity when user clicks a notification?

Question

I am attempting to convert some code I found in a tutorial for my own use. Originally, the code launched the system contacts list when the user would click a notification generated by my app. I am trying to start an Activity of my own instead of launching the contact list, but it's not working. More specifically, nothing happens. There is no error, and my Activity doesn't load either. The notification window disappears after clicking, and the original Activity is still visible.

Here is my code:

public class MyBroadcastReceiver extends BroadcastReceiver {
    private NotificationManager mNotificationManager;
    private int SIMPLE_NOTFICATION_ID;

    public void onReceive(Context context, Intent intent){
        Bundle extras = intent.getExtras();

        String deal = (String) extras.get("Deal");
        String title = "Deal found at " + (String) extras.get("LocationName");

        mNotificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notifyDetails = new Notification(R.drawable.icon, title,System.currentTimeMillis());

        Class ourClass;
        try {
            ourClass = Class.forName("com.kjdv.gpsVegas.ViewTarget");
            Intent startMyActivity = new Intent(context, ourClass);

            PendingIntent myIntent = PendingIntent.getActivity(context, 0,startMyActivity, 0);
            notifyDetails.setLatestEventInfo(context, title, deal, myIntent);
            notifyDetails.flags |= Notification.FLAG_AUTO_CANCEL;
            notifyDetails.flags |= Notification.DEFAULT_SOUND;
            mNotificationManager.notify(SIMPLE_NOTFICATION_ID, notifyDetails);
        }
        catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

This is my entry in the AndroidManifext.xml file...

  <activity android:name=".ViewTarget" android:label="@string/app_name" >
        <intent-filter>
            <action android:name="com.kjdv.gpsVegas.ViewTarget" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
   </activity>

And this is my Activity that I want to launch...

public class ViewTarget extends ListActivity {
    public ListAdapter getListAdapter() {
        return super.getListAdapter();
    }

    public ListView getListView() {
        return super.getListView();
    }

    public void setListAdapter(ListAdapter adapter) {
        super.setListAdapter(adapter);
    }

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.locations);
        Log.v("db", "Inside ViewTarget");
    }
}

Answer 1

Which Android version are you running on? You might wanna try using NotificationCompat instead. This class is include in the latest support package.

Intent notificationIntent = new Intent(context, ViewTarget.class);
PendingIntent contentIntent = PendingIntent.getActivity(context,
                0, notificationIntent,
                PendingIntent.FLAG_CANCEL_CURRENT);

NotificationManager nm = (NotificationManager) context
                .getSystemService(Context.NOTIFICATION_SERVICE);

Resources res = context.getResources();
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
builder.setContentIntent(contentIntent)
       .setSmallIcon(R.drawable.app_icon)
       .setLargeIcon(BitmapFactory.decodeResource(res, R.drawable.app_icon))
       .setTicker(payload)
       .setWhen(System.currentTimeMillis())
       .setAutoCancel(true)
       .setContentTitle("Message")
       .setContentText(payload);
Notification n = builder.getNotification();

n.defaults |= Notification.DEFAULT_ALL;
nm.notify(0, n);

EDIT: I know this is an old thread/question but this answer helped me for showing the activity when tapping the notification. For those people that this isn't working is probably because you haven't "registered" the activity in your manifest. For example:

<activity
   android:name="com.package.name.NameOfActivityToLaunch"
   android:label="Title of Activity" >
   <intent-filter>
     <action android:name="com.package.name.NAMEOFACTIVITYTOLAUNCH" />

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

And, hopefully, this should work. Hope it helped...

Answer 2

I figured out the problem. I forgot to include the package name in the activity declaration in the Manifest file.

Wrong:

activity android:name=".ViewTarget" android:label="@string/app_name" 

Correct:

activity android:name="com.kjdv.gpsVegas.ViewTarget" android:label="@string/app_name" 

Answer 3

you should set action and category for Intent.

Intent startMyActivity = new Intent(context, ourClass);
startMyActivity .setAction(Intent.ACTION_MAIN);
startMyActivity .addCategory(Intent.CATEGORY_LAUNCHER);

it works

Answer 4

Can you try removing the Intent filter, so it looks like this:

<activity android:name=".ViewTarget" android:label="@string/app_name" />

Also, not sure if this code will work:

ourClass = Class.forName("com.kjdv.gpsVegas.ViewTarget"); Intent startMyActivity = new Intent(context, ourClass);

Can you try it like this instead:

Intent startMyActivity = new Intent(context, ViewTarget.class);

Answer 5

check this code

            public class TestActivity extends Activity {
private static final int UNIQUE_ID = 882;

public static NotificationManager nm;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

        Intent navigationIntent = new Intent();


    navigationIntent.setClass(classname.this, MainActivity.class);


    PendingIntent pi = PendingIntent.getActivity(this, 0, navigationIntent,
            0);

    String body = "New notificattion added!!!";
    String title = "Notification";


    Notification n = new Notification(R.drawable.icon, body,
            System.currentTimeMillis());

            //this is for giving number on the notification icon

    n.number = Integer.parseInt(responseText);

    n.setLatestEventInfo(this, title, body, pi);
    n.defaults = Notification.DEFAULT_ALL;

    nm.notify(UNIQUE_ID, n);

Answer 6

In order to launch an Activity from an Intent , you need to add a flag:

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

This is true even if you declare the class in the Intent 's constructor.