Center Drawable and Text in EditText

Question

I want to make drawable and text center in my EditText. The text is centered but the drawable is not. I want something like this: http://i.imgur.com/cacxR2C.jpg?1

Please help. This is what I have done so far

 <EditText 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="Username"
    android:layout_marginLeft="15dp"
    android:layout_marginRight="15dp"
    android:gravity="center_horizontal"
    android:drawableLeft="@drawable/lol2"
    />

When the user types in something in the EditText, the drawable should move itself to the left if the text is lenghty.

Answer 1

You can do something like this

<RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:background="@android:drawable/editbox_background"
        >

        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:hint="Username"
            android:background="@null"
            android:gravity="center"
            android:drawableLeft="@drawable/ic_launcher"
            />
    </RelativeLayout>