Android相似网易云音乐的旋转专辑View

一.前言

最近作过 相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。但需求不彻底与网易云音乐同样，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。

java

二.思路

以下图，我这里是分为圆形背景+旋转的方形图片+渐变圆环

android

三.关键代码

1. 圆形背景git

<?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github

// 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canvas

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.总体布局ide

<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

https://github.com/dongpingwang/MusicAlbumView布局