Android自定义View中代码设置style

原文地址：http://www.qylk.blog.163.com/blog/static/1346873562014424101356472/

自定义一个View，可以在该myview.xml中写入该view的style，如：style="@style/mystle"，然后使用Inflater.inflate(R.layout.myview,null)获得该view的实例对象。

<span style="font-size:24px;">public StyledButton(Context context) {
    super(context, null, <span style="color:#ff0000;">R.style.mystle</span>);
//... whatever
}

public StyledButton(Context context, AttributeSet attrs) {
    super(context, attrs, <span style="color:#ff0000;">R.style.mystle</span>);
//... whatever
}

public StyledButton(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, <span style="color:#ff0000;">R.style.mystle</span>);
//... whatever
}</span>

<span style="font-size:24px;">查看官方文档可知其的确不可以：</span>

<span style="font-size:24px;">The default style to apply to this view. If 0, no style will be applied (beyond what is included in the theme). This may either be an attribute resource, whose value will be retrieved from the current theme, or an explicit style resource.</span>

<span style="font-family:Roboto, sans-serif;font-size:24px;color:#222222;line-height: 19px; white-space: normal; background-color: rgb(249, 249, 249);">
</span>

<span style="font-size:24px;">根据文档，解决的办法是定义一个attr ，并把该attr 放到app的Theme中去，如：</span>

<pre name="code"><span style="font-size:24px;"><resources xmlns:android="http://schemas.android.com/apk/res/android">
    <style name="AppBaseTheme" parent="android:Theme.Light">
        <item name="@attr/BtnStyle">@style/mystyle</item>
    </style>

    <attr name="BtnStyle" format="reference" />

    <style name="mystyle" parent="@android:style/Widget.Button">
        <item name="android:background">#f00</item>
    </style>

</resources></span>

<span style="font-size:24px;">代码中:</span>

<pre name="code"><span style="font-size:24px;">public class StyledButton extends Button {

 public StyledButton(Context context) {
  super(context, null, R.attr.BtnStyle);
 }

 public StyledButton(Context context, AttributeSet attrs) {
  super(context, attrs, R.attr.BtnStyle);
 }

 public StyledButton(Context context, AttributeSet attrs, int defStyle) {
  super(context, null, R.attr.BtnStyle);
 }
}</span>

<span style="font-size:24px;">最后记得menifest.xml：</span>

<pre name="code" style="color: rgb(34, 34, 34); font-size: 13px; line-height: 18px;"><span style="font-size:24px;"><application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
       <strong> android:theme="@style/AppBaseTheme"</strong> ></span>

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