Calling an activity inside a android library module

Question

I have an android library module and I'm trying to start an activity like

 Intent intent = new Intent(mContext, DetailsScreen.class);
            mContext.startActivity(intent);

I'm making above request inside the module and I have referenced the module in app gradle file like compile project(':myModule')

Also i have defined activity in Manifest file of both app module and in myModule like

  <activity
            android:name="com.test.mymodule.DetailsScreen" >
            <intent-filter>
                <action android:name="com.test.mymodule.DetailsScreen" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

But the activity which opens is an blank activity.

Can some one kindly explain me what's wrong I'm doing ?.

Thanks in advance :) :)

Sree Reddy Menon · Answer 1 · 2016-02-19T14:28:23.513

2

you should mention only your library activity in app manifest. like how we include for facebook or other sdk activities. and start the activity with intent from your app. just try with removing activities from manifest. include only on app module.(package must be from library's )

edited Feb 19 '16 at 14:28

answered Feb 19 '16 at 14:10

Sree Reddy Menon

1,301
13
23

i'm trying to make a call inside the library.. starting an activity with in library. not from outside library. – Beginner Feb 19 '16 at 14:13
updated .please try with removing activities from library manifest and mention only on app manifest. – Sree Reddy Menon Feb 19 '16 at 14:28

score 1 · Answer 2 · answered Aug 21 '19 at 12:45

This ans is copied from siddhesh

We can use reflection to get class object.

Class.forName("com.mypackage.myMainActivity")

Add this code in Library project to call,

try {
      Intent myIntent = new Intent(this,Class.forName("com.mypackage.myMainActivity"));
      startActivity(myIntent );
} catch (ClassNotFoundException e) {
     e.printStackTrace();
}

"com.mypackage.myMainActivity" is the Activity present in Main project, that we need to call from its Library project.

score 0 · Answer 3 · answered Feb 19 '16 at 14:15

0

Right click on App module, then Open Module Settings, choose App from the left, and on the last tab add the Module dependecy to your lib (you don't need to edit gradle file this way, even if what you have in your gradle seems correct). Then, declare the activity you want to open only in the android manifest of the library module.

<activity android:name=".myLibActivity"/>

answered Feb 19 '16 at 14:15

Federico Picci

1,105
10
17

i have added dependency the same way as u explained. I have tried declaring activity in library module only, but no luck . – Beginner Feb 19 '16 at 14:19
not getting any error, but the view is not getting drawn. only a blank screen is visible.. no views. – Beginner Feb 19 '16 at 14:22
try put a log into onCreate method of your activity to see if the code is reached. Maybe the layout is not linked. – Federico Picci Feb 19 '16 at 14:23
tried putting a toast message. but toast is not getting displayed. – Beginner Feb 19 '16 at 14:25
Try to log since you don't need a context this way. BTW, is the xml linked to the library in the module's layout? – Federico Picci Feb 19 '16 at 14:26
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/103966/discussion-between-picci-and-beginner). – Federico Picci Feb 19 '16 at 14:28

Calling an activity inside a android library module

3 Answers3