昨天写了一个气泡波纹效果，觉得不够实用，今天写一个仿支付宝【咻一咻】的效果，之前想在网上找找，可是没有找到。先看效果
怎么用？
<pre>
<github.alex.ripplewaveview.RippleSpreadView
xmlns:RippleWaveView="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
RippleWaveView:rsv_innerAnimDuration="3000"
RippleWaveView:rsv_innerCircleColor="#7E57C2"
RippleWaveView:rsv_innerSize="120dp"
RippleWaveView:rsv_outAnimDuration="3000"
RippleWaveView:rsv_outSize="240dp"/>
</pre>
代码？？
<pre>
package github.alex.ripplewaveview;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import com.alex.ripplewaveview.R;
/**
* 作者：Alex
*
* 时间：2016/8/22 18:14
*
* 博客地址：http://www.jianshu.com/users/c3c4ea133871/subscriptions
*
*
/
public class RippleSpreadView extends View {
private Paint innerPaint;
private Paint outPaint;
private float innerSize;
private int innerColor;
private int innerAnimDuration;
private int outColor;
private float outSize;
private float outSizeX;
private float outSizeXX;
private float outSizeXXX;
private float outSizeOld;
private int outAnimDuration;
private int width;
private int height;
private ObjectAnimator innerSizeAnimator;
private float outSizeStart;
private float outSizeEnd;
private float outSpreadValue;
private ObjectAnimator outSizeAnimator;
private ObjectAnimator outSizeXAnimator;
private ObjectAnimator outSizeXXAnimator;
private ObjectAnimator outSizeXXXAnimator;
private Interpolator linearInterpolator;
public RippleSpreadView(Context context) {
super(context);
}
public RippleSpreadView(Context context, AttributeSet attrs) {
super(context, attrs);
initView(attrs);
}
private void initView(AttributeSet attrs) {
linearInterpolator = new LinearInterpolator();
/outSpreadValue = 1.2F 比较好/
outSpreadValue = 1.0F;
Context context = getContext();
TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.RippleSpreadView);
innerColor = typedArray.getColor(R.styleable.RippleSpreadView_rsv_innerCircleColor, Color.parseColor("#E0E0E0"));
innerSize = typedArray.getDimension(R.styleable.RippleSpreadView_rsv_innerSize, 20F);
innerAnimDuration = typedArray.getInt(R.styleable.RippleSpreadView_rsv_innerAnimDuration, 500);
outColor = typedArray.getColor(R.styleable.RippleSpreadView_rsv_outCircleColor, Color.parseColor("#8BC34A"));
outSize = typedArray.getDimension(R.styleable.RippleSpreadView_rsv_outSize, 24F);
outAnimDuration = typedArray.getInt(R.styleable.RippleSpreadView_rsv_outAnimDuration, 700);
typedArray.recycle();
innerPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
innerPaint.setStyle(Paint.Style.FILL);
innerPaint.setColor(innerColor);
outPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
outPaint.setStyle(Paint.Style.FILL);
outPaint.setColor(outColor);
if (innerSize < dp2Px(8)) {
innerSize = dp2Px(20);
}
if ((innerAnimDuration < 100) || (innerAnimDuration > 10000)) {
innerAnimDuration = 2000;
}
if (outSize < dp2Px(8)) {
outSize = dp2Px(8);
}
if (outSize - innerSize < dp2Px(2)) {
outSize = innerSize + dp2Px(2);
}
outSizeOld = outSize;
if ((outAnimDuration < 100) || (outAnimDuration > 10000)) {
outAnimDuration = 2000;
}
innerSizeAnimator = ObjectAnimator.ofFloat(this, "innerSize", innerSize * 1F, innerSize * 1.1F, innerSize * 1F, innerSize * 1.1F).setDuration(innerAnimDuration);
innerSizeAnimator.setInterpolator(linearInterpolator);
innerSizeAnimator.setRepeatMode(ValueAnimator.REVERSE);
innerSizeAnimator.setRepeatCount(Integer.MAX_VALUE);
outSizeStart = innerSize * 0.9F;
outSizeEnd = outSize * outSpreadValue;
outSizeAnimator = ObjectAnimator.ofFloat(this, "outSize", outSizeStart, outSizeEnd).setDuration((long) (outAnimDuration));
outSizeXAnimator = ObjectAnimator.ofFloat(this, "outSizeX", outSizeStart, outSizeEnd).setDuration((long) (outAnimDuration));
outSizeXXAnimator = ObjectAnimator.ofFloat(this, "outSizeXX", outSizeStart, outSizeEnd).setDuration((long) (outAnimDuration));
outSizeXXXAnimator = ObjectAnimator.ofFloat(this, "outSizeXXX", outSizeStart, outSizeEnd).setDuration((long) (outAnimDuration));
initObjectAnimator(outSizeAnimator);
initObjectAnimator(outSizeXAnimator);
initObjectAnimator(outSizeXXAnimator);
initObjectAnimator(outSizeXXXAnimator);
outSizeXAnimator.setStartDelay((long) (outAnimDuration / 4));
outSizeXXAnimator.setStartDelay((long) (outAnimDuration * 2 / 4));
outSizeXXXAnimator.setStartDelay((long) (outAnimDuration * 3 / 4));
try {
innerSizeAnimator.start();
outSizeAnimator.start();
outSizeXAnimator.start();
outSizeXXAnimator.start();
outSizeXXXAnimator.start();
} catch (Exception e) {
}
}
private void initObjectAnimator(ObjectAnimator objectAnimator) {
objectAnimator.setRepeatMode(ValueAnimator.RESTART);
objectAnimator.setRepeatCount(Integer.MAX_VALUE);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
drawCircle(canvas, outSize, outPaint, outSizeEnd, outSizeStart, outSizeOld);
drawCircle(canvas, outSizeX, outPaint, outSizeEnd, outSizeStart, outSizeOld);
drawCircle(canvas, outSizeXX, outPaint, outSizeEnd, outSizeStart, outSizeOld);
drawCircle(canvas, outSizeXXX, outPaint, outSizeEnd, outSizeStart, outSizeOld);
canvas.drawCircle((width - 0) * 0.5F, (height - 0) * 0.5F, innerSize * 0.5F, innerPaint);
}
private final void drawCircle(Canvas canvas, float outSize, Paint outPaint, float outSizeEnd, float outSizeStart, float outSizeOld) {
float k = 255 / (outSizeEnd - outSizeStart);
int alpha = (int) (k * outSizeOld * outSpreadValue - k * outSize);
outPaint.setAlpha(alpha);
canvas.drawCircle((width - 0) * 0.5F, (height - 0) * 0.5F, outSize * 0.5F, outPaint);
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
try {
if (innerSizeAnimator != null) {
innerSizeAnimator.cancel();
}
if (outSizeAnimator != null) {
outSizeAnimator.cancel();
}
} catch (Exception e) {
}
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
try {
if (innerSizeAnimator != null) {
innerSizeAnimator.start();
}
if (outSizeAnimator != null) {
outSizeAnimator.start();
}
} catch (Exception e) {
}
}
/**
* 供 innerSizeAnimator 调用
/
public void setInnerSize(float innerSize) {
this.innerSize = innerSize;
invalidate();
}
/*
* 供 outSizeAnimator 调用
/
public void setOutSize(float outSize) {
this.outSize = outSize;
invalidate();
}
/*
* 供 outSizeAnimator 调用
/
public void setOutSizeX(float outSize) {
this.outSizeX = outSize;
invalidate();
}
/*
* 供 outSizeAnimator 调用
/
public void setOutSizeXX(float outSize) {
this.outSizeXX = outSize;
invalidate();
}
/*
* 供 outSizeAnimator 调用
/
public void setOutSizeXXX(float outSize) {
this.outSizeXXX = outSize;
invalidate();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
width = (int) outSizeEnd;
height = (int) outSizeEnd;
setMeasuredDimension(width, height);
}
/*
* 数据转换: dp---->px
*/
private float dp2Px(float dp) {
return dp * getContext().getResources().getDisplayMetrics().density;
}
}
</pre>
