android自訂view屬性

標籤：

 

方法一：

MyView.class

package com.bwie.view;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.view.View;public class MyView extends View {private int radius;private final static String NAMESPACE = "aaa1407a";public MyView(Context context, AttributeSet attrs) {super(context, attrs);// TODO Auto-generated constructor stubradius = attrs.getAttributeIntValue(NAMESPACE, "radius", 0);}@Overrideprotected void onDraw(Canvas canvas) {// TODO Auto-generated method stubsuper.onDraw(canvas);Paint paint=new Paint();paint.setColor(Color.CYAN);canvas.drawCircle(getWidth()/2, getHeight()/2, radius, paint);}}

 xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:myattr="aaa1407a"     android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity" >    <com.bwie.view.MyView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        myattr:radius="200" /></RelativeLayout>

attrs

<?xml version="1.0" encoding="utf-8"?><resources>    <declare-styleable name="MyView">        <attr name="radius" format="integer"/>        <attr name="mycolor" format="reference|color"/>    </declare-styleable>    </resources>

方法二：

MyView.class

package com.bwie.view;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.view.View;public class MyView extends View {        private int radius;public MyView(Context context, AttributeSet attrs) {        super(context, attrs);        // TODO Auto-generated constructor stub

　　//獲得自訂的屬性，即獲得自訂的半徑    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MyView);    radius=a.getInt(R.styleable.MyView_radius, 0);            }    @Override    protected void onDraw(Canvas canvas) {        // TODO Auto-generated method stub        super.onDraw(canvas);        Paint paint=new Paint();        paint.setColor(Color.CYAN);                canvas.drawCircle(getWidth()/2, getHeight()/2, radius, paint);    }}

xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:myattr="http://schemas.android.com/apk/res/com.bwie.test"//主包名   android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity" >    <com.bwie.view.MyView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        myattr:radius="200" /></RelativeLayout>

 attrs

<?xml version="1.0" encoding="utf-8"?><resources>    <declare-styleable name="MyView">        <attr name="radius" format="integer"/>        <attr name="mycolor" format="reference|color"/>    </declare-styleable>    </resources>

 

android自訂view屬性