Android 实现自定义倒计时
程序员文章站
2022-03-11 22:57:07
最近工作中遇到个要做倒计时60秒的进度条,经过参考别人的资料做出来需求的效果。废话少说先来个效果,一定想知道是怎么实现的吧!哈哈下面是代码public class CountDownView extends View { //圆轮颜色 private int mRingColor; //默认圆颜色 private int mRingNormalColor ; //圆轮宽度 private float mRingWidth; //圆轮进度值文本...
最近工作中遇到个要做倒计时60秒的进度条,经过参考别人的资料做出来需求的效果。废话少说先来个效果,
一定想知道是怎么实现的吧!哈哈下面是代码
public class CountDownView extends View {
//圆轮颜色
private int mRingColor;
//默认圆颜色
private int mRingNormalColor ;
//圆轮宽度
private float mRingWidth;
//圆轮进度值文本大小
private int mRingProgessTextSize;
//宽度
private int mWidth;
//高度
private int mHeight;
private Paint mPaint;
private Paint paintNormal;
//圆环的矩形区域
private RectF mRectF;
//
private int mProgessTextColor;
private int mCountdownTime;
private float mCurrentProgress;
private OnCountDownFinishListener mListener;
private ValueAnimator valueAnimator ;
public CountDownView(Context context) {
this(context, null);
}
public CountDownView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CountDownView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CountDownView);
mRingColor = a.getColor(R.styleable.CountDownView_ringColor, context.getResources().getColor(R.color.circle_progress));
mRingWidth = a.getFloat(R.styleable.CountDownView_ringWidth, 8);
mRingProgessTextSize = a.getDimensionPixelSize(R.styleable.CountDownView_progressTextSize, DisplayUtil.sp2px(context, 12));
mProgessTextColor = a.getColor(R.styleable.CountDownView_progressTextColor, context.getResources().getColor(R.color.circle_progress));
mCountdownTime = a.getInteger(R.styleable.CountDownView_countdownTime, 60);
mRingNormalColor = a.getColor(R.styleable.CountDownView_ringColor, context.getResources().getColor(R.color._circle_progress));
a.recycle();
paintNormal = new Paint(Paint.ANTI_ALIAS_FLAG);
paintNormal.setAntiAlias(true);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setAntiAlias(true);
this.setWillNotDraw(false);
}
public void setCountdownTime(int mCountdownTime) {
this.mCountdownTime = mCountdownTime;
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
mWidth = getMeasuredWidth();
mHeight = getMeasuredHeight();
mRectF = new RectF(0 + mRingWidth / 2, 0 + mRingWidth / 2,
mWidth - mRingWidth / 2, mHeight - mRingWidth / 2);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
/**
*圆环
*/
//颜色
mPaint.setColor(mRingColor);
//空心
mPaint.setStyle(Paint.Style.STROKE);
//宽度
mPaint.setStrokeWidth(mRingWidth);
/**
*默认圆环
*/
//颜色
paintNormal.setColor(mRingNormalColor);
//空心
paintNormal.setStyle(Paint.Style.STROKE);
//宽度
paintNormal.setStrokeWidth(mRingWidth);
canvas.drawArc(mRectF, 360, 360, false, paintNormal);
canvas.drawArc(mRectF, -90, mCurrentProgress - 360, false, mPaint);
//绘制文本
Paint textPaint = new Paint();
textPaint.setAntiAlias(true);
textPaint.setTextAlign(Paint.Align.CENTER);
String text = mCountdownTime - (int) (mCurrentProgress / 360f * mCountdownTime) + "";
textPaint.setTextSize(mRingProgessTextSize);
textPaint.setColor(mProgessTextColor);
//文字居中显示
Paint.FontMetricsInt fontMetrics = textPaint.getFontMetricsInt();
int baseline = (int) ((mRectF.bottom + mRectF.top - fontMetrics.bottom - fontMetrics.top) / 2);
canvas.drawText(text, mRectF.centerX(), baseline, textPaint);
}
private ValueAnimator getValA(long countdownTime) {
ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 100);
valueAnimator.setDuration(countdownTime);
valueAnimator.setInterpolator(new LinearInterpolator());
valueAnimator.setRepeatCount(0);
return valueAnimator;
}
/**
* 开始倒计时
*/
public void startCountDown() {
setClickable(false);
valueAnimator = getValA(mCountdownTime * 1000);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float i = Float.valueOf(String.valueOf(animation.getAnimatedValue()));
mCurrentProgress = (int) (360 * (i / 100f));
invalidate();
}
});
valueAnimator.start();
valueAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
//倒计时结束回调
if (mListener != null) {
mListener.countDownFinished();
}
setClickable(true);
}
});
}
public void setAddCountDownListener(OnCountDownFinishListener mListener) {
this.mListener = mListener;
}
public interface OnCountDownFinishListener {
void countDownFinished();
}
public void stopCountDown(){
valueAnimator.end();
}
}
然后新建一个attr.xml;
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="CountDownView">
<!--颜色-->
<attr name="ringColor" format="color" />
<!-- 进度文本的字体大小 -->
<attr name="progressTextSize" format="dimension" />
<!-- 圆环宽度 -->
<attr name="ringWidth" format="float" />
<!--进度文本颜色-->
<attr name="progressTextColor" format="color"/>
<!--倒计时-->
<attr name="countdownTime" format="integer"/>
</declare-styleable>
</resources>
这样一个自定义的view就写完了;那怎么用呢;布局就不说了;
losTime.setAddCountDownListener(new CountDownView.OnCountDownFinishListener() {
@Override
public void countDownFinished() {
倒计时结束
}
});
losTime.setCountdownTime(60);
losTime.startCountDown();
这样就轻轻松松的跑起来了,希望能帮助到需要的你;
本文地址:https://blog.csdn.net/Robert_dl/article/details/107375462