首先自定义属性：

自定义View代码如下：

/** * Created by Michael on 2019/11/1. */public class MyQQStep extends View {  private int out_color;  private int inner_color;  private float width;  private float textSize;  private int color;  private int width01;  private int height01;  private Paint outPaint;  private Paint innerPaint;  private Paint textPaint;  private float percent;  private int step;  public MyQQStep(Context context) {    this(context,null);  }  public MyQQStep(Context context, @Nullable AttributeSet attrs) {    this(context, attrs,0);  }  public MyQQStep(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);    TypedArray array = context.obtainStyledAttributes(attrs,R.styleable.MyQQStep);    out_color = array.getColor(R.styleable.MyQQStep_out_color, Color.BLACK);    inner_color = array.getColor(R.styleable.MyQQStep_inner_color, Color.RED);    width = array.getDimension(R.styleable.MyQQStep_border_width,10);    textSize = array.getDimensionPixelSize(R.styleable.MyQQStep_text_size,20);    color = array.getColor(R.styleable.MyQQStep_text_color, Color.GREEN);    array.recycle();    initPaint();    percent = 0;    step = 5000;  }  private void initPaint() {    outPaint = new Paint();    outPaint.setAntiAlias(true);    outPaint.setStyle(Paint.Style.STROKE);    outPaint.setStrokeWidth(width);    outPaint.setColor(out_color);    outPaint.setStrokeCap(Paint.Cap.ROUND);    innerPaint = new Paint();    innerPaint.setAntiAlias(true);    innerPaint.setStrokeWidth(width);    innerPaint.setStyle(Paint.Style.STROKE);    innerPaint.setColor(inner_color);    innerPaint.setStrokeCap(Paint.Cap.ROUND);    textPaint = new Paint();    textPaint.setAntiAlias(true);    textPaint.setColor(color);    textPaint.setStyle(Paint.Style.STROKE);    textPaint.setTextSize(textSize);  }  @Override  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {    //super.onMeasure(widthMeasureSpec, heightMeasureSpec);    int widthMode = MeasureSpec.getMode(widthMeasureSpec);    int heightMode = MeasureSpec.getMode(heightMeasureSpec);    if (widthMode == MeasureSpec.AT_MOST){    }else{      width01 = MeasureSpec.getSize(widthMeasureSpec);    }    if (heightMode == MeasureSpec.AT_MOST){    }else{      height01 = MeasureSpec.getSize(heightMeasureSpec);    }    setMeasuredDimension((width01>height01?height01:width01)        ,(width01>height01?height01:width01));  }  @Override  protected void onDraw(Canvas canvas) {    super.onDraw(canvas);    int realWidth = getWidth()>getHeight()?getHeight():getWidth();    int realHeight = getWidth()>getHeight()?getHeight():getWidth();    RectF r1 = new RectF(width/2,width/2,realWidth-width/2        ,realHeight-width/2);    canvas.drawArc(r1,135,270,false,outPaint);    canvas.drawArc(r1,135,270*percent,false,innerPaint);    Rect r = new Rect();    String s = step+"";    textPaint.getTextBounds(s,0,s.length(),r);    int textWidth = r.width();    int textHeight = r.height();    Paint.FontMetricsInt fontMetricsInt = new Paint.FontMetricsInt();    int dy = (fontMetricsInt.bottom-fontMetricsInt.top)/2-fontMetricsInt.bottom;    int baseLine = textHeight/2+dy+realHeight/2-textHeight/2;    int x0 = realWidth/2-textWidth/2;    canvas.drawText(s,x0,baseLine,textPaint);  }  public void setPercent(float percent,float value){    this.percent = percent;    this.step = (int) value;    invalidate();  }}

最后在布局以及MainActivity中调用：

private void initView() {    final MyQQStep qq_view = findViewById(R.id.qq_step);    ValueAnimator animator = ValueAnimator.ofFloat(0,5000);    animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {      @Override      public void onAnimationUpdate(ValueAnimator animation) {        float p = animation.getAnimatedFraction();        qq_view.setPercent(p,5000*p);      }    });    animator.setDuration(10000);    animator.start();  }