I have a sliding menu that uses fragments, each fragment activity are extending Fragment. One of the activities, Slider_Fragment2.java needs to import the android.support.v7.app.AppCompatActivity. The problem is, it kept on appearing as unused.

Here's my dependencies:

compile 'com.android.support:support-v4:23.0.3'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:support-v4:23.1.0'
compile 'com.android.support:design:23.1.0'

Here's what I've tried so far:

*I removed the appcompat library in the module settings and added it again, they're the same version of my support library.

*Clean and build the project

*Checked the libs folder of my project and looked for android-support-v4.jar for deletion, but I have none.

*Changed the declaration of my class to Slider_Fragment2 extends AppCompatActivty, this removed the errors in the activity but another appeared in my MainActivity where I have a function, replaceFragment() requiring the activities to extend Fragment only.

Here's my replaceFragment():

private void replaceFragment(int pos){
    Fragment fragment = null;
    switch(pos){
        case 0:
            fragment = new Slider_Fragment1();
            break;
        case 1:
            fragment = new Slider_Fragment2();
            break;
        case 2:
            fragment = new Slider_Fragment3();
            break;
        case 3:
            fragment = new Slider_Fragment4();
            break;
        case 4:
            fragment = new Slider_Fragment5();
            break;
        case 5:
            fragment = new Slider_Fragment6();
            break;
        case 6:
            fragment = new Slider_Fragment7();
            break;
        default:
            fragment = new Slider_Fragment1();
            break;
    }

    if(null!=fragment){
        FragmentManager fragmentManager = getFragmentManager();
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.replace(R.id.main_content, fragment);
        transaction.addToBackStack(null);
        transaction.commit();
    }

}

Remove the stated import statements first. If it is really required, the Classes that need it will get highlighted. Take your cursor to the erroring Class references and press Alt+Enter and then select import.... It will get the right packages and add imports.