Android_declare-styleable_ Properties of custom controls

1. Simple example

(1). Define a Attrs.xml file under the Res/values file

<?xml version= "1.0" encoding= "Utf-8"?><resources> <declare-styleable    name= "My" >        < attr name= "Content" format= "string"/>        <attr name= "BackColor" format= "Reference|color"/>    </ Declare-styleable></resources>

(2). layout file Use

<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android"    xmlns:tools= "http// Schemas.android.com/tools "    xmlns:my=" Http://schemas.android.com/apk/res/com.example.xmpptest "    android: Layout_width= "Match_parent"    android:layout_height= "match_parent"    android:orientation= "vertical" >    <com.example.xmpptest.mytextview        android:layout_width= "match_parent"        android:layout_height= " Wrap_content "        my:content=" MyColor ">    </com.example.xmpptest.MyTextView></LinearLayout>

(3). Custom Control Settings

public class Mytextview extends TextView {public Mytextview (context context) {This (context, null);} Public Mytextview (context context, AttributeSet Attrs) {This (context, attrs, 0);} Public Mytextview (context context, AttributeSet attrs, int defstyle) {Super (context, attrs, Defstyle); TypedArray a = Context.obtainstyledattributes (Attrs, r.styleable.my); String str = a.getstring (r.styleable.my_content); SetText (str + "@@"); A.recycle ();}}

2. Other Notes

(1). In each attr defined, format should be the specified type, string/integer/dimension/reference (reference R file)/color/enum/boolean, multiple format can be separated using | Others are the same, instance enum

<declare-styleable name= "My" >    <attr name= "Content" format= "string"/>    <attr name= "BackColor" format= "Reference|color"/>    <attr name= "Size" >        <enum name= "fill_parent" value= "-1"/>        <enum name= "Wrap_content" value= "-2"/>    </attr></declare-styleable>

(2). Xml namespace rules in the layout file,xmlns:toolbar=http://schemas.android.com/apk/res/[packagename]

Android_declare-styleable_ Properties of custom controls