dependencies { 
 compile 'com.android.support:appcompat-v7:X.X.X' // X.X.X 为最新的版本号
 }

public class MainActivity extends AppCompatActivity {
 ...
}

<EditText 
 android:layout_width="match_parent" 
 android:layout_height="wrap_content" 
 android:hint="Hint text"/>

<style name="MyEditText" parent="Theme.AppCompat.Light"> 
 <item name="colorControlNormal">@color/indigo</item> 
 <item name="colorControlActivated">@color/pink</item>
</style>

<EditText 
 android:layout_width="match_parent" 
 android:layout_height="wrap_content" 
 android:hint="Hint text" 
 android:theme="@style/MyEditText"/>