安卓个性化 Button

android:background="@drawable/btn_selector"

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/shape_bt_login_pressed" android:state_pressed="true"/>
    <item android:drawable="@drawable/shape_bt_login_normal" android:state_pressed="false"/>
</selector>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:radius="8dp"/>
    <solid android:color="#4169E1"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:radius="3dp"/>
    <solid android:color="#DB4537"/>
</shape>