Android自定义环状进度条（带加载动画效果）

最近闲来无事，自定义了一个环状进度条，话不多说直接上代码 ：

public class CircleProgressView extends View{
private Paint mCirPaint;
private Paint mArcPaint;
private Paint mTextPaint;
private float radius=200;
private int textsize=60;
private int progress=68;
private int stokeWidth=10;
private int circleColor=Color.GRAY;
private int arcColor=Color.GREEN;
private int textColor=Color.BLACK;
private int speed=0;
public CircleProgressView(Context context) {
super(context);
}

public CircleProgressView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}

public CircleProgressView(Context context, AttributeSet attrs) {
super(context, attrs);
}

public void setRadius(float radius){
this.radius=radius;
invalidate();
}

public void setTextSize(int textsize){
this.textsize=textsize;
invalidate();
}

public void setProgress(int progress){
this.progress=progress;
}

public void setStokewidth(int stokeWidth){
this.stokeWidth=stokeWidth;
invalidate();
}

public void setColor(int circleColor,int arcColor,int textColor){
this.circleColor=circleColor;
this.arcColor=arcColor;
this.textColor=textColor;
invalidate();
}

public void setSpeed(int speed){
this.speed=speed;
}

private void init() {
mCirPaint=new Paint();
mCirPaint.setColor(circleColor);
mCirPaint.setAntiAlias(true);
mCirPaint.setStyle(Paint.Style.STROKE);
mCirPaint.setStrokeWidth(stokeWidth);

mArcPaint=new Paint();
mArcPaint.setColor(arcColor);
mArcPaint.setAntiAlias(true);
mArcPaint.setStyle(Paint.Style.STROKE);
mArcPaint.setStrokeWidth(stokeWidth);

mTextPaint=new Paint();
mTextPaint.setColor(textColor);
mTextPaint.setTextSize(textsize);
mTextPaint.setAntiAlias(true);
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
init();
float centerX=getWidth()/2;
float centerY=getHeight()/2;
canvas.drawCircle(centerX,centerY,radius,mCirPaint);
canvas.drawArc(centerX-radius,centerY-radius,centerX+radius,centerY+radius,-90,progress*360/100,false,mArcPaint);
canvas.drawText(progress+"%",centerX-(mTextPaint.measureText(progress+"%"))/2,centerY+textsize/2,mTextPaint);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (speed!=0){
startProgress();
}
}

public void startProgress(){
final int preProgress=progress;
new CountDownTimer(preProgress * speed, speed) {
@Override
public void onTick(long l) {
setProgress(preProgress-(int) (l/speed));
invalidate();
}

@Override
public void onFinish() {
setProgress(preProgress);
invalidate();
this.cancel();
}
}.start();
}

}

相关用法：

setProgress(progress);//设置进度

setRadius(300);//设置半径

setStokewidth(60);//设置环宽

setTextSize(80);//设置文字进度大小

setColor(Color.GRAY,Color.RED,Color.BLUE);//设置颜色（环的颜色，进度条的颜色，文字进度的字体颜色）

setSpeed(20);//设置动画速度，这里的数值是每次进度加一所用时间，所以数值越小动画速度越快

测试代码：

mCircleProgressView= (CircleProgressView) findViewById(R.id.circle_progress);
mCircleProgressView.setProgress(progress);
mCircleProgressView.setRadius(300);
mCircleProgressView.setStokewidth(60);
mCircleProgressView.setTextSize(80);
mCircleProgressView.setColor(Color.GRAY,Color.RED,Color.BLUE);
mCircleProgressView.setSpeed(20);

测试效果