android 自定义View（3）圆形View 加速条

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

<attr name="firstColor" format="color"></attr>
<attr name="secondColor" format="color"></attr>
<attr name="circleWidth" format="dimension"></attr>
<attr name="speed" format="integer"></attr>

<declare-styleable name="CustomProgress">
<attr name="firstColor"></attr>
<attr name="secondColor"></attr>
<attr name="circleWidth"></attr>
<attr name="speed"></attr>
</declare-styleable>

</resources>

package com.zhy.customview02;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;

public class CustomProgress extends View {
/**
* 第一圈颜色
*/
private int firstColor;
/**
* 第二圈颜色
*/
private int secondColor;
/**
* 圆的宽度
*/
private int circleWidth;
/**
* 速度
*/
private int speed;
/**
* 当前的进度
*/
private int curProgress;
/**
* 画笔
*/
private Paint mPaint;

boolean isNext = false;

public CustomProgress(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedArray typedArray = context.getTheme().obtainStyledAttributes(attrs, R.styleable.CustomProgress, defStyle, 0);
initView(typedArray);
}
public CustomProgress(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CustomProgress(Context context) {
super(context, null);
}

public void initView(TypedArray typedArray){
int n = typedArray.getIndexCount();
for (int i = 0; i < n; i++) {
int attr = typedArray.getIndex(i);
switch (attr) {
case R.styleable.CustomProgress_firstColor:
firstColor = typedArray.getColor(attr, Color.GREEN);
break;
case R.styleable.CustomProgress_secondColor:
secondColor = typedArray.getColor(attr, Color.RED);
break;
case R.styleable.CustomProgress_speed:
speed = typedArray.getInt(attr, 20);
break;
case R.styleable.CustomProgress_circleWidth:
circleWidth = typedArray.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_PX, 20, getResources().getDisplayMetrics()));
break;
default:
break;
}
}
typedArray.recycle();
mPaint = new Paint();

new Thread(new Runnable(){
@Override
public void run() {
while(true){
curProgress += speed;
if(curProgress == 360){
curProgress = 0;
if(!isNext){
isNext = true;
}else {
isNext = false;
}
}
postInvalidate();
try {
Thread.sleep(500);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
}
}).start();
}

@Override
protected void onDraw(Canvas canvas) {

int center =getWidth()/2;
int radius = center - circleWidth/2;
mPaint.setStrokeWidth(circleWidth);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setAntiAlias(true);
RectF oval = new RectF(center-radius, center-radius, center+radius, center+radius);
//canvas.drawArc(oval, 0, 360, false, mPaint);
if(isNext){
mPaint.setColor(firstColor);
canvas.drawCircle(center, center, radius, mPaint);//画圆

mPaint.setColor(secondColor);
canvas.drawArc(oval, -90, curProgress, false, mPaint);

}else{
mPaint.setColor(secondColor);
canvas.drawCircle(center, center, radius, mPaint);//画圆

mPaint.setColor(firstColor);
canvas.drawArc(oval, -90, curProgress, false, mPaint);
}

}

}