Android自定义加载loading view动画组件

package com.hysmarthotel.view;import com.hysmarthotel.roomcontrol.R;import com.hysmarthotel.util.EaseInOutCubicInterpolator;import android.animation.TimeInterpolator;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Point;import android.util.AttributeSet;import android.view.View;import android.view.animation.AnimationUtils;public class CircleProgress extends View { private static final int RED = 0xFFE5282C; private static final int YELLOW = 0xFF1F909A; private static final int BLUE = 0xFFFC9E12; private static final int COLOR_NUM = 3; private int[] COLORS; private TimeInterpolator mInterpolator = new EaseInOutCubicInterpolator(); private final double DEGREE = Math.PI / 180; private Paint mPaint; private int mViewSize; private int mPointRadius; private long mStartTime; private long mPlayTime; private boolean mStartAnim = false; private Point mCenter = new Point(); private ArcPoint[] mArcPoint; private static final int POINT_NUM = 15; private static final int DELTA_ANGLE = 360 / POINT_NUM; private long mDuration = 3600; public CircleProgress(Context context) {  super(context);  init(null, 0); } public CircleProgress(Context context, AttributeSet attrs) {  super(context, attrs);  init(attrs, 0); } public CircleProgress(Context context, AttributeSet attrs, int defStyle) {  super(context, attrs, defStyle);  init(attrs, defStyle); } private void init(AttributeSet attrs, int defStyle) {  mArcPoint = new ArcPoint[POINT_NUM];  mPaint = new Paint();  mPaint.setAntiAlias(true);  mPaint.setStyle(Paint.Style.FILL);  TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.CircleProgress, defStyle, 0);  int color1 = a.getColor(R.styleable.CircleProgress_color1, RED);  int color2 = a.getColor(R.styleable.CircleProgress_color2, YELLOW);  int color3 = a.getColor(R.styleable.CircleProgress_color3, BLUE);  a.recycle();  COLORS = new int[]{color1, color2, color3}; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  int defaultSize = getResources().getDimensionPixelSize(R.dimen.default_circle_view_size);  int width = getDefaultSize(defaultSize, widthMeasureSpec);  int height = getDefaultSize(defaultSize, heightMeasureSpec);  mViewSize = Math.min(width, height);  setMeasuredDimension(mViewSize, mViewSize);  mCenter.set(mViewSize / 2, mViewSize / 2);  calPoints(1.0f); } @Override protected void onDraw(Canvas canvas) {  canvas.save();  canvas.translate(mCenter.x, mCenter.y);  float factor = getFactor();  canvas.rotate(36 * factor);  float x, y;  for (int i = 0; i < POINT_NUM; ++i) {   mPaint.setColor(mArcPoint[i].color);   float itemFactor = getItemFactor(i, factor);   x = mArcPoint[i].x - 2 * mArcPoint[i].x * itemFactor;   y = mArcPoint[i].y - 2 * mArcPoint[i].y * itemFactor;   canvas.drawCircle(x, y, mPointRadius, mPaint);  }  canvas.restore();  if (mStartAnim) {   postInvalidate();  } } private void calPoints(float factor) {  int radius = (int) (mViewSize / 3 * factor);  mPointRadius = radius / 12;  for (int i = 0; i < POINT_NUM; ++i) {   float x = radius * -(float) Math.sin(DEGREE * DELTA_ANGLE * i);   float y = radius * -(float) Math.cos(DEGREE * DELTA_ANGLE * i);   ArcPoint point = new ArcPoint(x, y, COLORS[i % COLOR_NUM]);   mArcPoint[i] = point;  } } private float getFactor() {  if (mStartAnim) {   mPlayTime = AnimationUtils.currentAnimationTimeMillis() - mStartTime;  }  float factor = mPlayTime / (float) mDuration;  return factor % 1f; } private float getItemFactor(int index, float factor) {  float itemFactor = (factor - 0.66f / POINT_NUM * index) * 3;  if (itemFactor < 0f) {   itemFactor = 0f;  } else if (itemFactor > 1f) {   itemFactor = 1f;  }  return mInterpolator.getInterpolation(itemFactor); } public void startAnim() {  mPlayTime = mPlayTime % mDuration;  mStartTime = AnimationUtils.currentAnimationTimeMillis() - mPlayTime;  mStartAnim = true;  postInvalidate(); } public void reset() {  stopAnim();  mPlayTime = 0;  postInvalidate(); } public void stopAnim() {  mStartAnim = false; } public void setInterpolator(TimeInterpolator interpolator) {  mInterpolator = interpolator; } public void setDuration(long duration) {  mDuration = duration; } public void setRadius(float factor) {  stopAnim();  calPoints(factor);  startAnim(); } static class ArcPoint {  float x;  float y;  int color;  ArcPoint(float x, float y, int color) {   this.x = x;   this.y = y;   this.color = color;  } }}

package com.hysmarthotel.util;import android.animation.TimeInterpolator;public class EaseInOutCubicInterpolator implements TimeInterpolator { @Override public float getInterpolation(float input) {  if ((input *= 2) < 1.0f) {   return 0.5f * input * input * input;  }  input -= 2;  return 0.5f * input * input * input + 1; }}

mProgressView = (CircleProgress)findViewById(R.id.progress_vie);mProgressView.startAnim(); //开始mProgressView.stopAnim(); //结束mProgressView.setRadius(factor); //半径mProgressView.reset(); //复原

<?xml version="1.0" encoding="utf-8"?><AbsoluteLayout  xmlns:android="http://schemas.android.com/apk/res/android" xmlns:circleprogress="http://schemas.android.com/apk/res/com.hysmarthotel.roomcontrol"  //这个地方记得要加 //包名 android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/bg1" >  <com.hysmarthotel.view.CircleProgress                   //类名  android:id="@+id/progress_vie"  android:layout_x="350.5px"  android:layout_y="150.0px"  android:layout_width="1140.0px"  android:layout_height="700.0px"  circleprogress:color1="@android:color/holo_red_light"   //这些参数就是通过xmlns:circleprogress，和attrs文件相关联的 　　　　circleprogress:color2="@android:color/holo_green_light" 　　　　circleprogress:color3="@android:color/holo_blue_light" />

 <declare-styleable name="CircleProgress">  <attr name="color1" format="reference|color"/>  <attr name="color2" format="reference|color"/>  <attr name="color3" format="reference|color"/> </declare-styleable> 

 <?xml version="1.0" encoding="utf-8"?><resources> <dimen name="activity_horizontal_margin">16dp</dimen> <dimen name="activity_vertical_margin">16dp</dimen> <dimen name="default_circle_view_size">200dp</dimen></resources>