在EditText上添加圖標

在EditText上添加圖標的實例:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10sp"
        android:drawablePadding="5dp"
        android:drawableStart="@drawable/ic_launcher"
        android:gravity="left|bottom"
        android:textColor="#F0F0F0"
        android:background="#B0B0B0"
        android:hint="hello" >
    </EditText>

</LinearLayout>