add drawables in editText

edtiTextDrawable.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:gravity="center"
        android:orientation="vertical"
        android:layout_marginTop="16dp"
        >
 
    <EditText
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:gravity="center_vertical"
              android:hint="@string/user_name"
              android:drawableLeft="@drawable/ic_action_person"
              android:drawablePadding="8dp"
            />
    <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center_vertical"
            android:hint="@string/password"
            android:drawableLeft="@drawable/ic_action_accounts"
            android:drawablePadding="8dp"
            />
    <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/log_in"
            android:drawableRight="@drawable/ic_action_accept"
            />
 
</LinearLayout>