本文实例为大家分享了Android实现网易云音乐的旋转专辑View，供大家参考，具体内容如下

一.前言

最近做过 类似网易云音乐专辑唱片的效果，这里记录下开发思路，仅供参考。但需求不完全与网易云音乐一样，这个只有图片会旋转(网易云是整个磁盘都会旋转)，没有唱片机械臂。

二.思路

如下图，我这里是分为 圆形背景+旋转的方形图片+渐变圆环

三.关键代码

1. 圆形背景

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval"> <size android:width="1dp" android:height="1dp" /> <solid android:color="#1AFFFFFF" /></shape>

2.旋转的方形图片

// 设置旋转动画(属性动画)private void init(Context context) { View.inflate(context, R.layout.view_rotate_album, this); ivAlbumPic = (ImageView) findViewById(R.id.view_pic); animator = ObjectAnimator.ofFloat(ivAlbumPic, "rotation", 0.0F, 360.0F); animator.setDuration(10 * 1000); animator.setInterpolator(new LinearInterpolator()); animator.setRepeatCount(ObjectAnimator.INFINITE); animator.setRepeatMode(ValueAnimator.RESTART); setPlaying(true); } // 更新播放状态 public void setPlaying(boolean isPlaying) { Log.d(TAG, "update RotateAlbumView: isPlaying = " + isPlaying); if (isPlaying) { if (!animator.isRunning()) { animator.start(); } else { animator.resume(); } } else { if (!animator.isStarted() || !animator.isRunning()) { animator.cancel(); } animator.pause(); }}

3.渐变圆环

public class WidgetAlbumBgView extends View { private Paint paint; // 圆环半径 private int ringWidth; // 渐变色 private int[] colors; private SweepGradient gradient; // 圆线距圆环内边的距离 private int[] ringLinesMarginOut = { dp2px(3.78F), dp2px(7.03F), dp2px(10.27F), dp2px(12.97F) }; // 圆线高度 private int ringLineWidth; public WidgetAlbumBgView(Context context) { this(context, null); } public WidgetAlbumBgView(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public WidgetAlbumBgView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(context, attrs); } private void init(Context context, AttributeSet attrs) { paint = new Paint(); paint.setAntiAlias(true); paint.setStyle(Paint.Style.STROKE); paint.setStrokeCap(Paint.Cap.ROUND); colors = new int[]{getColor(R.color.widget_album_ring_color1), getColor(R.color.widget_album_ring_color2), getColor(R.color.widget_album_ring_color1), getColor(R.color.widget_album_ring_color2), getColor(R.color.widget_album_ring_color1)}; TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.WidgetAlbumBgView); ringWidth = (int) typedArray.getDimension(R.styleable.WidgetAlbumBgView_ring_width, getResources().getDimension(R.dimen.widget_album_ring_width)); ringLineWidth = (int) typedArray.getDimension(R.styleable.WidgetAlbumBgView_ring_line_width, getResources().getDimension(R.dimen.widget_album_ring_line_width)); typedArray.recycle(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); paint.setStrokeWidth(ringWidth); paint.setColor(getColor(R.color.widget_album_ring_color1)); if (gradient == null) { gradient = new SweepGradient(getWidth() * 0.5F, getHeight() * 0.5F, colors, new float[]{ 0F, 0.25F, 0.5F, 0.75F, 1F }); } paint.setShader(gradient); // 画圆环 canvas.drawCircle(getWidth() * 0.5F, getHeight() * 0.5F, (getWidth() - ringWidth) * 0.5F, paint); paint.setShader(null); paint.setStrokeWidth(ringLineWidth); paint.setColor(getColor(R.color.widget_album_ring_line_color)); // 画圆线 for (int marginOut : ringLinesMarginOut) { canvas.drawCircle(getWidth() * 0.5F, getHeight() * 0.5F, getWidth() * 0.5F - marginOut - ringLineWidth * 0.5F, paint); } }}

4.整体布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="@dimen/widget_album_size_vertical" android:layout_height="@dimen/widget_album_size_vertical" android:background="@drawable/rotate_album_bg"> <ImageView android:id="@+id/view_pic" android:layout_width="@dimen/widget_album_pic_size" android:layout_height="@dimen/widget_album_pic_size" android:layout_centerInParent="true" android:scaleType="centerInside" android:src="@mipmap/ic_qifenle" /> <com.example.musicalbumview.view.WidgetAlbumBgView android:layout_width="86.49dp" android:layout_height="86.49dp" android:layout_centerInParent="true" /></RelativeLayout>

四.github地址

点击链接

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。