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在github上找的一个有点酷炫的loading动画https://github.com/Fichardu/CircleProgress 

我写写使用步骤 
自定义view(CircleProgress )的代码 

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;} }}
EaseInOutCubicInterpolator是自定义view(CircleProgress )中要是用的一个工具 
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; }}
在activity中的调用(还有一些其他用法可以自己看看github上的源代码) 
mProgressView = (CircleProgress)findViewById(R.id.progress_vie);mProgressView.startAnim(); //开始mProgressView.stopAnim(); //结束mProgressView.setRadius(factor); //半径mProgressView.reset(); //复原
在xml文件中的布局 
<?xml version="1.0" encoding="utf-8"?><AbsoluteLayoutxmlns: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" />
自己在values目录中新建的attrs文件,这是与自定义view中自定义参数相关的

 <declare-styleable name="CircleProgress"><attr name="color1" format="reference|color"/><attr name="color2" format="reference|color"/><attr name="color3" format="reference|color"/> </declare-styleable> 
自己在values目录中新建的dimens文件,这个只是几个颜色参数

 <?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>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。