Android自定義view實(shí)現(xiàn)圓形waveview

<declare-styleable name="custom_wave_view_attr">

 <attr name="circle_color" format="color"></attr> //圓的顏色
 <attr name="circle_background_color" format="color"></attr> //圓的背景色
 <attr name="progress_wave_color" format="color"></attr> //水波紋的顏色
 <attr name="progress_text_size" format="dimension"></attr> //字體的大小
 <attr name="progress_text_color" format="color"></attr>  //字體的顏色

</declare-styleable>

TypedArray ta = context.obtainStyledAttributes(attrs,R.styleable.custom_wave_view_attr);
//圓的顏色
circle_color = ta.getColor(R.styleable.custom_wave_view_attr_circle_color,getResources().getColor(android.R.color.black));
//圓的背景色
circle_bg_color = ta.getColor(R.styleable.custom_wave_view_attr_circle_background_color,getResources().getColor(android.R.color.white));
//水波紋顏色
wave_color = ta.getColor(R.styleable.custom_wave_view_attr_progress_wave_color,getResources().getColor(android.R.color.holo_blue_dark));
//字體的顏色
text_color = ta.getColor(R.styleable.custom_wave_view_attr_progress_text_color,getResources().getColor(android.R.color.black));
//字體的大小
textSize = ta.getDimension(R.styleable.custom_wave_view_attr_progress_text_size,30f);
//釋放資源
ta.recycle();

//初始化背景圓畫筆
mBgCirclePaint = new Paint();
//抗鋸齒
mBgCirclePaint.setAntiAlias(true);
//設(shè)置背景圓的背景色
mBgCirclePaint.setColor(circle_bg_color);
//設(shè)置充滿
mBgCirclePaint.setStyle(Paint.Style.FILL);
//初始化水波紋畫筆
mWavePaint = new Paint();
//抗鋸齒
mWavePaint.setAntiAlias(true);
//設(shè)置水波紋的背景色
mWavePaint.setColor(wave_color);
//設(shè)置充滿
mWavePaint.setStyle(Paint.Style.FILL);
//使用Xfermode獲取重疊部分
mWavePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));

/**
* 初始化貝塞爾曲線上的點(diǎn)
*/
private void reset() {
 startP = new PointF(-width, height);
 nextP = new PointF(-width/2, height);
 threeP = new PointF(0, height);
 fourP = new PointF(width/2, height);
 endP = new PointF(width, height);
 controllerP1 = new PointF(-width/4, height);
 controllerP2 = new PointF(-width * 3/4, height);
 controllerP3 = new PointF(width/4, height);
 controllerP4 = new PointF(width * 3/4, height);
}

@Override
protected void onDraw(Canvas canvas) {
 super.onDraw(canvas);
 //在透明畫布上畫背景圓
 mCanvas.drawCircle(width/2, height/2, radius, mBgCirclePaint);
 //貝塞爾曲線
 mPath.reset();
 mPath.moveTo(startP.x, startP.y);
 mPath.quadTo(controllerP1.x, controllerP1.y, nextP.x, nextP.y);
 mPath.quadTo(controllerP2.x, controllerP2.y, threeP.x, threeP.y);
 mPath.quadTo(controllerP3.x, controllerP3.y, fourP.x, fourP.y);
 mPath.quadTo(controllerP4.x, controllerP4.y, endP.x, endP.y);
 mPath.lineTo(endP.x, height);
 mPath.lineTo(-width, height);
 //在透明畫布上繪制水波紋
 mCanvas.drawPath(mPath,mWavePaint);
 //將畫好的圓繪制在畫布上
 canvas.drawBitmap(mBitmap, 0, 0, null);
}

/**
* 開始動(dòng)畫 讓startP的x點(diǎn)坐標(biāo)在2S時(shí)間內(nèi)循環(huán)移動(dòng)到0點(diǎn)。
* depth---進(jìn)度
* waveRipple----水波紋的振幅
*/
private void startAnimator() {
 animator = ValueAnimator.ofFloat(startP.x, 0);
 animator.setInterpolator(new LinearInterpolator());
 animator.setDuration(2000);
 //重復(fù)循環(huán)
 animator.setRepeatCount(ValueAnimator.INFINITE);
 animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
 @Override
 public void onAnimationUpdate(ValueAnimator animation) {
 startP.x = (Float) animation.getAnimatedValue();
 startP = new PointF(startP.x, height - depth);
 nextP = new PointF(startP.x + width/2, height - depth);
 threeP = new PointF(nextP.x + width/2, height - depth);
 fourP = new PointF(threeP.x + width/2, height - depth);
 endP = new PointF(fourP.x + width/2, height - depth);
 controllerP1 = new PointF(startP.x + width/4, height - depth + waveRipple);
 controllerP2 = new PointF(nextP.x + width/4, height - depth - waveRipple);
 controllerP3 = new PointF(threeP.x + width/4, height - depth + waveRipple);
 controllerP4 = new PointF(fourP.x + width/4, height - depth - waveRipple);
 invalidate();
 }
 });
 animator.start();
}

<com.criclewaveview_master.CustomWaveView
 android:id="@+id/custom_circle_wave_view"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 wave:circle_color = "@color/circle_color"
 android:layout_centerInParent="true"
 wave:circle_background_color = "@color/circle_bg_color"
 wave:progress_wave_color = "@color/colorAccent"
 wave:progress_text_size = "20sp"
 wave:progress_text_color = "@color/circle_color"/>