Android: Drop down menu

I had a custom action bar, the center button was the button that opened a menu under it like a drop down menu (if not exactly like one).

AbstractActivity

public abstract class AbstractActivity extends ActionBarActivity {

@Override
 protected void onCreate(Bundle savedInstanceState) {

  this.getSupportActionBar().setDisplayHomeAsUpEnabled(false);
  this.getSupportActionBar().setDisplayShowHomeEnabled(false);
  this.getSupportActionBar().setDisplayUseLogoEnabled(false);
  this.getSupportActionBar().setDisplayShowCustomEnabled(true);
  this.getSupportActionBar().setCustomView(R.layout.action_bar_view);
  this.getSupportActionBar().setBackgroundDrawable(
    getResources().getDrawable(R.drawable.background_test));

  View customView = getSupportActionBar().getCustomView();
  View mainMenu = customView.findViewById(R.id.main_menu);
  mainMenu.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {

    getMainMenu().animateToggle();
   }
  });

  setTitle(this.getTitle());
 }
}

action_bar_view

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/white"
    android:gravity="center"
    android:orientation="horizontal" >

    <com.provengroup.view.MainMenuButtonView 
        android:id="@+id/main_menu"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

MainMenuButtonView

public class MainMenuButtonView extends LinearLayout {

    private ImageView logoImage;
    private Animation animationRight;
    private Animation animationLeft;
    boolean opened = false;

    public MainMenuButtonView(Context context) {
        this(context, null);
    }

    public MainMenuButtonView(Context context, AttributeSet attrs) {
        super(context, attrs);

        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        inflater.inflate(R.layout.main_menu_button_view, this, true);

        logoImage = (ImageView) findViewById(R.id.logo_image);

        animationRight = AnimationUtils.loadAnimation(context, R.anim.rotate_right);
        animationRight.setFillAfter(true);

        animationLeft = AnimationUtils.loadAnimation(context, R.anim.rotate_left);
        animationLeft.setFillAfter(true);
    }

    public Bitmap getResizedImage() {

        Bitmap image = BitmapFactory.decodeResource(getResources(),
                R.drawable.checkpos_logo_image);

        int height = getHeight();

        if (height != 0 && height != image.getWidth()) {

            int width = height * image.getWidth() / image.getHeight();

            Bitmap scaledImage = Bitmap.createScaledBitmap(image, width,
                    height, false);

            image.recycle();

            return scaledImage;

        } else {

            return image;
        }
    }

    @Override
    public void setOnClickListener(final OnClickListener l) {

        super.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(final View v) {

                if (opened) {
                    logoImage.startAnimation(animationLeft);
                    
                    opened = false;

                } else {
                    logoImage.startAnimation(animationRight);
                    
                    opened = true;
                }

                l.onClick(v);
            }
        });
    }

    public void restore() {
        
        if (opened) {
            
            logoImage.startAnimation(animationLeft);
            
            opened = false;
        }
    }

}

main_menu_button_view

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/main_menu"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/white"
    android:gravity="center"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/logo_image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/checkpos_logo_image" />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:src="@drawable/checkpos_logo_text" />

</LinearLayout>

rotate_right

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <rotate 
        android:duration="300"
        android:pivotX="50%"
        android:pivotY="50%"
        android:fromDegrees="0"
        android:toDegrees="180"/>
</set>

rotate_left

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <rotate 
        android:duration="300"
        android:pivotX="50%"
        android:pivotY="50%"
        android:fromDegrees="180"
        android:toDegrees="0"/>
</set>

Android: Device driver issues

1) Run the SDK Manager.
2) Select "Android SDK Platform-tools" under "Tools" (if needed) and "Google USB Driver" under "Extras" (if needed)
3) Right click on "Computer" and select "Manage". Click on "Device manager". Alternatively click on Windows home button and search for "Device manager" and run it.
4) Expand the "Portable devices" tab. Right click on your device and then select the following "Update driver software" > "Browse my computer for driver software" > "Let me pick from a list of device driver on my computer" > "Have disk.." >  "Browse" and go to your root android path "<android_sdk_path>/extras/google/usb_driver/android_winusb.inf" click "Next" and "Yes" to all following dialogs and you will be done.

For a more in depth explanation . Thanks Rashid Saeed you are the man!