自定义组件属性定义获取

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

<!--定义名字叫MyAttributeView属性集合-->
<declare-styleable name="MyAttributeView">
<!--定义一个名字叫my_name并且类型是string的属性-->
<attr name="my_name" format="string"/>
<!--定义一个名字叫my_age并且类型是integer的属性-->
<attr name="my_age" format="integer"/>
<!--定义一个名字叫my_bg并且类型是reference|color的属性-->
<attr name="my_bg" format="reference|color"/>

</declare-styleable>

</resources>

public class MyAttributeView extends View {
private int myAge;
private String myName;
private Bitmap myBg;

public MyAttributeView(Context context, AttributeSet attrs) {
super(context, attrs);

//获取属性三种方式
//1.用命名空间取获取
String age = attrs.getAttributeValue("http://schemas.android.com/apk/res-auto","my_age");
String name = attrs.getAttributeValue("http://schemas.android.com/apk/res-auto","my_name");
String bg = attrs.getAttributeValue("http://schemas.android.com/apk/res-auto","my_bg");
// System.out.println("age=="+age+",name=="+name+",bg==="+bg);

//2.遍历属性集合
for(int i=0;i<attrs.getAttributeCount();i++){
System.out.println(attrs.getAttributeName(i)+"====="+attrs.getAttributeValue(i));
}

//3.使用系统工具，获取属性
TypedArray typedArray = context.obtainStyledAttributes(attrs,R.styleable.MyAttributeView);
for(int i=0;i<typedArray.getIndexCount();i++){
int index = typedArray.getIndex(i);

switch (index){
case R.styleable.MyAttributeView_my_age:
myAge = typedArray.getInt(index,0);
break;
case R.styleable.MyAttributeView_my_name:
myName = typedArray.getString(index);
break;
case R.styleable.MyAttributeView_my_bg:
Drawable drawable = typedArray.getDrawable(index);
BitmapDrawable drawable1 = (BitmapDrawable) drawable;
myBg = drawable1.getBitmap();
break;
}
}

// 记得回收
typedArray.recycle();

}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint = new Paint();
canvas.drawText(myName+"---"+myAge,50,50,paint);
canvas.drawBitmap(myBg,50,50<
4000
/span>,paint);
}
}