Android類似網易云音樂的旋轉專輯View

一.前言

? ??最近做過 類似網易云音樂專輯唱片的效果，這里記錄下開發思路，僅供參考，但需求不完全與網易云音樂一樣，這個只有圖片會旋轉(網易云是整個磁盤都會旋轉)，沒有唱片機械臂，

二.思路

? ??如下圖，我這里是分為 圓形背景+旋轉的方形圖片+漸變圓環

三.關鍵代碼

??1. 圓形背景

<?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.旋轉的方形圖片

    // 設定旋轉影片(屬性影片)
    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);
    }

    // 更新播放狀態
    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.漸變圓環

public class WidgetAlbumBgView extends View {
    private Paint paint;
    // 圓環半徑
    private int ringWidth;
    // 漸變色
    private int[] colors;
    private SweepGradient gradient;
    // 圓線距圓環內邊的距離
    private int[] ringLinesMarginOut = {
            dp2px(3.78F),
            dp2px(7.03F),
            dp2px(10.27F),
            dp2px(12.97F)
    };
    // 圓線高度
    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);
        // 畫圓環
        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));
        // 畫圓線
        for (int marginOut : ringLinesMarginOut) {
            canvas.drawCircle(getWidth() * 0.5F, getHeight() * 0.5F, getWidth() * 0.5F - marginOut - ringLineWidth * 0.5F, paint);
        }
    }

}

??4.整體布局

<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

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