CODEWITHSUNDEEP
javaandroidandroid-activity
Patrick
Patrick

Reputation: 13

Unable to instantiate activity inside another class

I want to put the Activity class inside my custom view like this

public class AppLauncher extends LinearLayout
{
    // My custom view

    public class Settings extends Activity
    {
        @Override
        public void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.app_launcher_settings);
        }
    }
}

and I started the activity with

Intent setting = new Intent(mContext, AppLauncher.Settings.class);
mContext.startActivity(setting);

but my app crash with error java.lang.Class<in.blackant.systemui.widget.AppLauncher$Settings> has no zero argument constructor

Upvotes: 0

Views: 46

Answers (1)

CommonsWare
CommonsWare

Reputation: 1006819

I want to put the Activity class inside my custom view like this

That is extremely strange.

but my app crash with error java.lang.Class<in.blackant.systemui.widget.AppLauncher$Settings> has no zero argument constructor

That is because Settings is an inner class. Only AppLauncher can create an instance of it. As a result, the framework cannot create an instance of it.

If you really wish to keep this current structure, you would need to make Settings static:

public static class Settings extends Activity

Upvotes: 2

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