Android如何自定义View仿QQ运动步数效果

这篇文章主要介绍了Android如何自定义View仿QQ运动步数效果，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。

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(); }

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