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这还只是张图片 本文由hadisi5216原创，这篇可不能匿名转载。 背景：我一哥们公司做智能设备的，该动画用在手机和家中网络连接时用，他让我看了下需求。刚看到这动画时感觉产品UI设计的不错，想着试试。昨天开始做的，本来感觉很简单，但做起来貌似没那么简单；最后花了近一天时间终于搞定了。看看效果还行！ 
niceloading.gif 如果有想直接用的同道中人，看前半部分就行；如果想批评指正我的思考的看看后半部分 1.直接上代码（NiceLoadingView） package com.hadisi.niceloading;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.LinearInterpolator;
/**
* Created by hadisi5216 on 2016/7/12.
*/
public class NiceLoadingView extends View {
private Context mContext;
private Paint mPaint;
private int widthSpecSize;
private int heightSpecSize;
private int radiusSmall = 38;
private int radiusbig = 76;
private int moveX;
private int XPoint;
private int mState = -1;//0失败，1成功，-1默认
private boolean mflag;
private ValueAnimator animator;
public NiceLoadingView(Context context) {
super(context);
}
public NiceLoadingView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public NiceLoadingView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContext = context;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
mPaint = new Paint();
mPaint.setColor(0xFFFFBC53);
mPaint.setAntiAlias(true);
if (Math.abs(moveX) > widthSpecSize * 5 / 4)
{
XPoint = (moveX < 0) ? XPoint = widthSpecSize * 7 / 4
- Math.abs(moveX) : widthSpecSize - widthSpecSize * 7 / 4
+ Math.abs(moveX);
canvas.drawCircle(XPoint, heightSpecSize / 2, radiusSmall, mPaint);
}
if (Math.abs(moveX) > widthSpecSize && Math.abs(moveX) < widthSpecSize * 3 / 2)
{
XPoint = (moveX < 0) ? XPoint = widthSpecSize * 3 / 2 - Math.abs(moveX)
: widthSpecSize - widthSpecSize * 3 / 2 + Math.abs(moveX);
canvas.drawCircle(XPoint, heightSpecSize / 2, radiusSmall, mPaint);
}
if (Math.abs(moveX) > widthSpecSize * 3 / 4 && Math.abs(moveX) < widthSpecSize * 5 / 4)
{
XPoint = (moveX < 0) ? XPoint = widthSpecSize * 5 / 4 - Math.abs(moveX) :
widthSpecSize - widthSpecSize * 5 / 4 + Math.abs(moveX);
canvas.drawCircle(XPoint, heightSpecSize / 2, radiusSmall, mPaint);
}
if (Math.abs(moveX) > widthSpecSize / 2 && Math.abs(moveX) < widthSpecSize) {
XPoint = (moveX < 0) ? XPoint = widthSpecSize - Math.abs(moveX) :
widthSpecSize - widthSpecSize + Math.abs(moveX);
canvas.drawCircle(XPoint, heightSpecSize / 2, radiusSmall, mPaint);
}
if (Math.abs(moveX) > widthSpecSize / 4 && Math.abs(moveX) < widthSpecSize * 3 / 4) {
XPoint = (moveX < 0) ? XPoint = widthSpecSize * 3 / 4 - Math.abs(moveX) :
widthSpecSize - widthSpecSize * 3 / 4 + Math.abs(moveX);
canvas.drawCircle(XPoint, heightSpecSize / 2, radiusSmall, mPaint);
}
if (Math.abs(moveX) > 0 && Math.abs(moveX) < widthSpecSize / 2) {
XPoint = (moveX < 0) ? XPoint = widthSpecSize / 2 - Math.abs(moveX) :
widthSpecSize - widthSpecSize / 2 + Math.abs(moveX);
canvas.drawCircle(XPoint, heightSpecSize / 2, radiusSmall, mPaint);
}
//中间大圆
if (Math.abs(moveX) > 0 && Math.abs(moveX) < widthSpecSize * 5 / 4) {
radiusbig = 2 * radiusSmall - radiusSmall *
(Math.abs(moveX)) / (widthSpecSize * 5 / 4);
radiusbig = (radiusbig > radiusSmall) ? radiusbig : radiusSmall;
canvas.drawCircle(widthSpecSize / 2, heightSpecSize / 2, radiusbig, mPaint);
}
if (Math.abs(moveX) < 12 && mState >= 0) {
if (mState == 0) {
canvas.drawCircle(widthSpecSize / 2, heightSpecSize / 2, radiusbig, mPaint);
Bitmap bitmap = BitmapFactory.decodeResource(getContext().getResources(),
R.mipmap.connect_failed);
canvas.drawBitmap(bitmap, null, new Rect(widthSpecSize /
2 - radiusbig, heightSpecSize / 2 - radiusbig, widthSpecSize /
2 + radiusbig, heightSpecSize / 2 + radiusbig), mPaint);
}
if (mState == 1) {
canvas.drawCircle(widthSpecSize / 2, heightSpecSize / 2, radiusbig, mPaint);
Bitmap bitmap = BitmapFactory.decodeResource(getContext().getResources(),
R.mipmap.connect_success);
canvas.drawBitmap(bitmap, null, new Rect(widthSpecSize /
2 - radiusbig, heightSpecSize / 2 - radiusbig, widthSpecSize /
2 + radiusbig, heightSpecSize / 2 + radiusbig), mPaint);
}
}
}
public void start() {
if (animator != null)
animator.cancel();
moveX = widthSpecSize * (-9 / 4);
mState = -1;
mflag = true;
post(new Runnable() {
@Override
public void run() {
animator = ValueAnimator.ofFloat(0f, 1.0f);
animator.setDuration(3000);//没啥用
animator.setRepeatMode(ValueAnimator.RESTART);
animator.setRepeatCount(ValueAnimator.INFINITE);
animator.setInterpolator(new LinearInterpolator());
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
if (mState < 0) {
moveX = (moveX > widthSpecSize * 7 / 4)
? widthSpecSize * (-9 / 4) : moveX + 12;
if (Math.abs(moveX) < 12)
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
} else {
if (moveX > 0)
moveX = (moveX > widthSpecSize * 7 / 4)
? widthSpecSize * (-9 / 4) : moveX + 12;
else if (moveX < 0 && mflag) {
moveX += 12;
if (Math.abs(moveX) < 12)
mflag = false;
}
}
postInvalidate();
}
});
animator.start();
}
});
}
public void success() {
mState = 1;
}
public void failed() {
mState = 0;
}
}
项目已上传到github，戳着 2.怎么用？ （编辑：温州站长网）
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