Do I need to import support-v4 and appcompat-v7 to use them?

Question

I use AppCompatActivity and some other things like fragments etc. These are some of my operations:

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;

I copied these dependencies from Google samples:

dependencies {
    compile 'com.google.android.gms:play-services-ads:9.4.0'
    compile 'com.android.support:support-v4:23.1.1'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.android.support:design:23.4.0'
}

Now I'm trying to delete them, and I noticed that I can delete them:

compile 'com.android.support:support-v4:23.1.1'
compile 'com.android.support:appcompat-v7:23.4.0'

By deleting them, my project works fine ... why?

I am compiling with this:

compileSdkVersion 23
buildToolsVersion "23.0.3"
minSdkVersion 14
targetSdkVersion 22

Answer 1

appcompat-v7 support-v4. , , , . ./gradlew app:dependencies :

_releaseCompile - ## Internal use, do not manually configure ##
+--- com.android.support:design:23.4.0
|    +--- com.android.support:recyclerview-v7:23.4.0
|    |    +--- com.android.support:support-annotations:23.4.0 -> 24.0.0
|    |    \--- com.android.support:support-v4:23.4.0 -> 24.0.0 (*)
|    +--- com.android.support:appcompat-v7:23.4.0 -> 24.0.0
|    |    +--- com.android.support:support-v4:24.0.0 (*)
|    |    +--- com.android.support:support-vector-drawable:24.0.0
|    |    |    \--- com.android.support:support-v4:24.0.0 (*)
|    |    \--- com.android.support:animated-vector-drawable:24.0.0
|    |         \--- com.android.support:support-vector-drawable:24.0.0 (*)
|    \--- com.android.support:support-v4:23.4.0 -> 24.0.0 (*)

, , build.gradle ( ):

"B", "B" , "B" - "A" . "A" "B", "A" .