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
<"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" />
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
<"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查字典教程网。
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