今天看到一个效果挺不错的，就模仿了下来，加上了一些自己想要的效果，感觉还不错的样子，所以就分享出来了，话不多说，上图
CircleView
这里主要是实现中心圆以及水波特效
package com.lgl.circleview;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.os.Handler;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ProgressBar;
/**
* 水波圆
*
* @author lgl
*
*/
public class CircleView extends View {
private Context mContext;
private int mScreenWidth;
private int mScreenHeight;
private Paint mRingPaint;
private Paint mCirclePaint;
private Paint mWavePaint;
private Paint linePaint;
private Paint flowPaint;
private Paint leftPaint;
private int mRingSTROKEWidth = 15;
private int mCircleSTROKEWidth = 2;
private int mLineSTROKEWidth = 1;
private int mCircleColor = Color.WHITE;
private int mRingColor = Color.WHITE;
private int mWaveColor = Color.WHITE;
private Handler mHandler;
private long c = 0L;
private boolean mStarted = false;
private final float f = 0.033F;
private int mAlpha = 50;// 透明度
private float mAmplitude = 10.0F; // 振幅
private float mWaterLevel = 0.5F;// 水高(0~1)
private Path mPath;
// 绘制文字显示在圆形中间，只是我没有设置，我觉得写在布局上也挺好的
private String flowNum = "";
private String flowLeft = "还剩余";
/**
* @param context
*/
public CircleView(Context context) {
super(context);
// TODO Auto-generated constructor stub
mContext = context;
init(mContext);
}
/**
* @param context
* @param attrs
*/
public CircleView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
mContext = context;
init(mContext);
}
/**
* @param context
* @param attrs
* @param defStyleAttr
*/
public CircleView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// TODO Auto-generated constructor stub
mContext = context;
init(mContext);
}
public void setmWaterLevel(float mWaterLevel) {
this.mWaterLevel = mWaterLevel;
}
private void init(Context context) {
mRingPaint = new Paint();
mRingPaint.setColor(mRingColor);
mRingPaint.setAlpha(50);
mRingPaint.setStyle(Paint.Style.STROKE);
mRingPaint.setAntiAlias(true);
mRingPaint.setStrokeWidth(mRingSTROKEWidth);
mCirclePaint = new Paint();
mCirclePaint.setColor(mCircleColor);
mCirclePaint.setStyle(Paint.Style.STROKE);
mCirclePaint.setAntiAlias(true);
mCirclePaint.setStrokeWidth(mCircleSTROKEWidth);
linePaint = new Paint();
linePaint.setColor(mCircleColor);
linePaint.setStyle(Paint.Style.STROKE);
linePaint.setAntiAlias(true);
linePaint.setStrokeWidth(mLineSTROKEWidth);
flowPaint = new Paint();
flowPaint.setColor(mCircleColor);
flowPaint.setStyle(Paint.Style.FILL);
flowPaint.setAntiAlias(true);
flowPaint.setTextSize(36);
leftPaint = new Paint();
leftPaint.setColor(mCircleColor);
leftPaint.setStyle(Paint.Style.FILL);
leftPaint.setAntiAlias(true);
leftPaint.setTextSize(36);
mWavePaint = new Paint();
mWavePaint.setStrokeWidth(1.0F);
mWavePaint.setColor(mWaveColor);
mWavePaint.setAlpha(mAlpha);
mPath = new Path();
mHandler = new Handler() {
@Override
public void handleMessage(android.os.Message msg) {
if (msg.what == 0) {
invalidate();
if (mStarted) {
// 不断发消息给自己，使自己不断被重绘
mHandler.sendEmptyMessageDelayed(0, 60L);
}
}
}
};
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = measure(widthMeasureSpec, true);
int height = measure(heightMeasureSpec, false);
if (width < height) {
setMeasuredDimension(width, width);
} else {
setMeasuredDimension(height, height);
}
}
/**
* @category 测量
* @param measureSpec
* @param isWidth
* @return
*/
private int measure(int measureSpec, boolean isWidth) {
int result;
int mode = MeasureSpec.getMode(measureSpec);
int size = MeasureSpec.getSize(measureSpec);
int padding = isWidth ? getPaddingLeft() + getPaddingRight()
: getPaddingTop() + getPaddingBottom();
if (mode == MeasureSpec.EXACTLY) {
result = size;
} else {
result = isWidth ? getSuggestedMinimumWidth()
: getSuggestedMinimumHeight();
result += padding;
if (mode == MeasureSpec.AT_MOST) {
if (isWidth) {
result = Math.max(result, size);
} else {
result = Math.min(result, size);
}
}
}
return result;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
// TODO Auto-generated method stub
super.onSizeChanged(w, h, oldw, oldh);
mScreenWidth = w;
mScreenHeight = h;
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
// 得到控件的宽高
int width = getWidth();
int height = getHeight();
setBackgroundColor(mContext.getResources().getColor(R.color.main_bg));
// 计算当前油量线和水平中线的距离
float centerOffset = Math.abs(mScreenWidth / 2 * mWaterLevel
- mScreenWidth / 4);
// 计算油量线和与水平中线的角度
float horiAngle = (float) (Math.asin(centerOffset / (mScreenWidth / 4)) * 180 / Math.PI);
// 扇形的起始角度和扫过角度
float startAngle, sweepAngle;
if (mWaterLevel > 0.5F) {
startAngle = 360F - horiAngle;
sweepAngle = 180F + 2 * horiAngle;
} else {
startAngle = horiAngle;
sweepAngle = 180F - 2 * horiAngle;
}
canvas.drawLine(mScreenWidth * 3 / 8, mScreenHeight * 5 / 8,
mScreenWidth * 5 / 8, mScreenHeight * 5 / 8, linePaint);
float num = flowPaint.measureText(flowNum);
canvas.drawText(flowNum, mScreenWidth * 4 / 8 - num / 2,
mScreenHeight * 4 / 8, flowPaint);
float left = leftPaint.measureText(flowLeft);
canvas.drawText(flowLeft, mScreenWidth * 4 / 8 - left / 2,
mScreenHeight * 3 / 8, leftPaint);
// 如果未开始(未调用startWave方法),绘制一个扇形
if ((!mStarted) || (mScreenWidth == 0) || (mScreenHeight == 0)) {
// 绘制,即水面静止时的高度
RectF oval = new RectF(mScreenWidth / 4, mScreenHeight / 4,
mScreenWidth * 3 / 4, mScreenHeight * 3 / 4);
canvas.drawArc(oval, startAngle, sweepAngle, false, mWavePaint);
return;
}
// 绘制,即水面静止时的高度
// 绘制,即水面静止时的高度
RectF oval = new RectF(mScreenWidth / 4, mScreenHeight / 4,
mScreenWidth * 3 / 4, mScreenHeight * 3 / 4);
canvas.drawArc(oval, startAngle, sweepAngle, false, mWavePaint);
if (this.c >= 8388607L) {
this.c = 0L;
}
// 每次onDraw时c都会自增
c = (1L + c);
float f1 = mScreenHeight * (1.0F - (0.25F + mWaterLevel / 2))
- mAmplitude;
// 当前油量线的长度
float waveWidth = (float) Math.sqrt(mScreenWidth * mScreenWidth / 16
- centerOffset * centerOffset);
// 与圆半径的偏移量
float offsetWidth = mScreenWidth / 4 - waveWidth;
int top = (int) (f1 + mAmplitude);
mPath.reset();
// 起始振动X坐标，结束振动X坐标
int startX, endX;
if (mWaterLevel > 0.50F) {
startX = (int) (mScreenWidth / 4 + offsetWidth);
endX = (int) (mScreenWidth / 2 + mScreenWidth / 4 - offsetWidth);
} else {
startX = (int) (mScreenWidth / 4 + offsetWidth - mAmplitude);
endX = (int) (mScreenWidth / 2 + mScreenWidth / 4 - offsetWidth + mAmplitude);
}
// 波浪效果
while (startX < endX) {
int startY = (int) (f1 - mAmplitude
* Math.sin(Math.PI
* (2.0F * (startX + this.c * width * this.f))
/ width));
canvas.drawLine(startX, startY, startX, top, mWavePaint);
startX++;
}
canvas.drawCircle(mScreenWidth / 2, mScreenHeight / 2, mScreenWidth / 4
+ mRingSTROKEWidth / 2, mRingPaint);
canvas.drawCircle(mScreenWidth / 2, mScreenHeight / 2,
mScreenWidth / 4, mCirclePaint);
canvas.restore();
}
@Override
public Parcelable onSaveInstanceState() {
Parcelable superState = super.onSaveInstanceState();
SavedState ss = new SavedState(superState);
ss.progress = (int) c;
return ss;
}
@Override
public void onRestoreInstanceState(Parcelable state) {
SavedState ss = (SavedState) state;
super.onRestoreInstanceState(ss.getSuperState());
c = ss.progress;
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
// 关闭硬件加速，防止异常unsupported operation exception
this.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
}
/**
* @category 开始波动
*/
public void startWave() {
if (!mStarted) {
this.c = 0L;
mStarted = true;
this.mHandler.sendEmptyMessage(0);
}
}
/**
* @category 停止波动
*/
public void stopWave() {
if (mStarted) {
this.c = 0L;
mStarted = false;
this.mHandler.removeMessages(0);
}
}
/**
* @category 保存状态
*/
static class SavedState extends BaseSavedState {
int progress;
/**
* Constructor called from {@link ProgressBar#onSaveInstanceState()}
*/
SavedState(Parcelable superState) {
super(superState);
}
/**
* Constructor called from {@link #CREATOR}
*/
private SavedState(Parcel in) {
super(in);
progress = in.readInt();
}
@Override
public void writeToParcel(Parcel out, int flags) {
super.writeToParcel(out, flags);
out.writeInt(progress);
}
public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}
}
我们运行一下
其实他是十分的空旷的，所以也值得我们去定制，我们在中间加个流量显示，再加个进度条
activity_main.xml
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/main_bg" >
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:text="流量"
android:textColor="@android:color/white"
android:textSize="18sp" />
android:id="@+id/wave_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_centerInParent="true" />
android:id="@+id/power"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textColor="@android:color/white" />
android:id="@+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="150dp" />
```
>我们要实现这个，就要调用它的初始化以及start方法
```
mCircleView = (CircleView) findViewById(R.id.wave_view);
// 设置多高，float，0.1-1F
mCircleView.setmWaterLevel(0.1F);
// 开始执行
mCircleView.startWave();
别忘了activity销毁的时候把它回收哦
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
mCircleView.stopWave();
mCircleView = null;
super.onDestroy();
}
我们再运行一遍
但是我们要怎么让水波纹随着进度条一起上升下降尼？，这里我们就要用到我们刚才写的SeekBar了，我们实现它的setOnSeekBarChangeListener来监听，这样我们就要复写他的三个方法，这里我们只要用到一个
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
//跟随进度条滚动
mCircleView.setmWaterLevel((float) progress / 100);
}
这里，我们要这样算的，我们设置高度的单位是float，也就是从0-1F，而我们的进度是int progress，从0-100，我们就要用(float) progress / 100)并且强转来得到单位，好了，我们现在水波纹的高度就是随着我们的进度条一起变化了，我们再来运行一下
好的，这样的话，我们就只剩下一个了，就是让大小随着我们的进度条变化了，这里我们因为更新UI不能再主线程中操作，所以我们需要用到我们的老伙计Handler了，但是用到handler还不够，我们的进度条数值也是在内部类里面，所以这里我们需要用到Handler来传值了，这里我们用的是Bundle,我们还是在onProgressChanged方法中操作了
//创建一个消息
Message message = new Message();
Bundle bundle = new Bundle();
//put一个int值
bundle.putInt("progress
