我已经定义在Style.xml两种风格,我想以编程方式更改样式一定的条件下,闵SDK版本21
<style name="CheckOutButtonStyle" parent="@style/Widget.AppCompat.Button.Colored">
<item name="android:layout_height">60dp</item>
<item name="android:fontFamily">sans-serif-medium</item>
<item name="android:textSize">16sp</item>
<item name="android:padding">0dp</item>
<item name="android:textColor">@color/white_color</item>
<item name="android:layout_margin">@dimen/general_spacing</item>
</style>
<style name="ScanNextItemSecondaryButtonStyle" parent="@style/Widget.AppCompat.Button.Borderless">
<item name="android:layout_height">wrap_content</item>
<item name="android:fontFamily">sans-serif-medium</item>
<item name="android:stateListAnimator">@null
</item> <!-- remove the shadow, per UI request -->
<item name="android:textSize">16sp</item>
<item name="android:padding">0dp</item>
<item name="android:minHeight">0dp</item>
<item name="android:minWidth">0dp</item>
<item name="android:background">@null</item>
<item name="android:textColor">@color/colorSecondaryAccent</item>
<item name="android:layout_marginBottom">@dimen/general_spacing</item>
</style
1. Create xml in drawable.
\res\drawable\back_button_answer.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<corners android:radius="10dip" />
<!-- background -->
<gradient
android:startColor="#D6D7D6"
android:centerColor="#E2E2E2"
android:centerY="0.75"
android:endColor="#D6D7D6"
android:angle="270"
/>
<stroke android:width="2dip" android:color="#fff"/>
</shape>
2. Button btn.setBackgroundResource(R.drawable.back_button_answer);