Can't open Activity from other module

Question

I've added a reference to a new module and try to open an Activity from it. It throws an Exception that says:

android.content.ActivityNotFoundException: Unable to find explicit activity class{
com.giljulio.imagepicker.ui/com.giljulio.imagepicker.ui.ImagePickerActivity };

have you declared this activity in your AndroidManifest.xml?

Do I need to add anything else beside reference the new module?

Countermeasure

Did you in fact add the activity to your AndroidManifest.xml? – Teenager

You can check this. #16546225 – Disreputable

declare ImagePickerActivity activity in the Manifest... <activity android:name="com.giljulio.imagepicker.ui.ImagePickerActivity"/> – Evangelineevangelism

Thanks. It was really not define in my AndroidManifest, But, maybe I don't understand something, I want to use a github project ( github.com/giljulio/android-multiple-image-picker ), If I import this module to my project I need to call it's main activity ? when I do so, it throw an exception that it doen not recognize some of it R.id's. the module manifest is : <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" > </application> – Countermeasure

I investigated this issue in the following article and proposed a practical solution. https://mcmap.net/q/379348/-how-to-start-an-activity-in-another-module-explicitly – Chilung

Answer 1

You have to define in gradle dependencies(in module where you want to call another module activity):

dependencies{
     ...
     compile project(':yourModuleName')
     ...
}

After adding this sync the gradle and now can you use the activity in the module.

Growing

Do you edit the build.gradle file directly, or is there a dialog in Android Studio to use? – Junk

Answer 2

User like this. This will help you

Intent intent = null;
try {
    intent = new Intent(this, 
       Class.forName("ir.test.testlibary1.HelloWorldActivity"));
    startActivity(intent);
} catch (ClassNotFoundException e) {
    e.printStackTrace();
}

Flaring

Answer 3

Ok, so I am a few years late.

The issue is not that you don't have the gradle dependency as @arpit suggested, it seems you report a runtime exception. Also, what @Aman suggested will help with the handling the exception, it will just not help you start the activity.

If understood correctly, you have a multi-module app (let's say A-app module and B-lib module) and need to call another lib-module(C) from one B.

If that is the case, you need to declare that library's activity(C) in your module's(B) Manifest.xml, inside the tag.

If it has not already been setup, you also need to enable manifest merger.

Glosseme