Activitynotfoundexception When Different Package's Targetclass In Preferencescreen

The application's default package is 'example.app'. and the target activity's package is 'example.app.abc'. Calling startActivity() for 'example.app.abc.TheActivity' in java code j

Solution 1:

I just ran into the same problem when trying to use a custom preference screen from a library project for the AccountManager account settings. No matter how I tried to tweak the targetPackage and targetClass attributes, it would throw an exception (except, since it's an account, it crashes the phone).

I think we'll just have to assume this is an Android limitation. It's clumsy, but all you really need to do is declare a wrapper class for the activity within your application's namespace:

publicclassMyPreferencesextendsActualPreferences {
}

Declare it in your AndroidManifest.xml

<activityandroid:name=".MyPreferences"/>

Then you can specify the class in your intent

<intentandroid:targetPackage="com.my.package"android:targetClass="com.my.package.MyPreferences" />

By the way, the syntax is extremely fussy, at least for account preferences. All these variations fail:

<!-- fails --><intentandroid:targetClass="com.my.package.MyPreferences" /><!-- fails --><intentandroid:targetClass="MyPreferences"android:targetPackage="com.my.package"/><!-- fails --><intentandroid:targetClass=".MyPreferences"android:targetPackage="com.my.package"/><!-- fails --><intentandroid:targetClass="settings.MyPreferences"android:targetPackage="com.my.package"/><!-- fails --><intentandroid:targetClass=".settings.MyPreferences"android:targetPackage="com.my.package"/><!-- fails --><intentandroid:targetClass="com.my.other.package.MyPreferences"android:targetPackage="com.my.package"/>

The critical factor is apparently that the android:targetPackage attribute matches the application package. If you want, you can put the activity in a sub-package. This works:

<intentandroid:targetPackage="com.my.package"android:targetClass="com.my.package.settings.MyPreferences" />

Solution 2:

as already said its not working with libraries. Do it programatically, something like this:

preference_my_pref.setOnPreferenceClickListener(newOnPreferenceClickListener() {
                publicbooleanonPreferenceClick(Preference preference) {
                    Intentintent=newIntent(MyActivity.this, ActivityToStart.class);
                    startActivity(intent);
                    returntrue;
                }
            });