Android 流量球效果的WaveView

Android 流量球效果的WaveView

先看效果图：

实现上面效果的思路是使用正弦或者余弦曲线，代码如下：

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packagecom.nero.waveview;

 

importandroid.content.Context;

importandroid.graphics.Canvas;

importandroid.graphics.Color;

importandroid.graphics.Paint;

importandroid.graphics.Path;

importandroid.graphics.RectF;

importandroid.os.Handler;

importandroid.os.Parcel;

importandroid.os.Parcelable;

importandroid.util.AttributeSet;

importandroid.view.View;

importandroid.widget.ProgressBar;

 

/**

* @category View必须是正方形

*

*/

publicclassWaterWaveView extendsView {

 

     privateContext mContext;

 

     privateintmScreenWidth;

     privateintmScreenHeight;

 

     privatePaint mRingPaint;

     privatePaint mCirclePaint;

     privatePaint mWavePaint;

     privatePaint linePaint;

     privatePaint flowPaint;

     privatePaint leftPaint;

 

     privateintmRingSTROKEWidth = 15;

     privateintmCircleSTROKEWidth = 2;

     privateintmLineSTROKEWidth = 1;

 

// 细圆

     privateintmCircleColor = Color.WHITE;

// 文字颜色


privateintmTextColor = Color.WHITE;


// 粗圆


     privateintmRingColor = Color.GREEN;

// 波浪颜色


     privateintmWaveColor = Color.GREEN;

// 背景颜色


   privateintmBackgroundColor = Color.LTGRAY;

 

     privateHandler mHandler;

     privatelongc = 0L;

     privatebooleanmStarted = false;

     privatefinalfloat f = 0.033F;

     privateintmAlpha = 100;// 透明度，可酌情设置，设置太小和背景颜色衬托下，显得波浪效果不好

     privatefloatmAmplitude = 6.0F;// 振幅越大，波浪效果越明显，但是10%的时候，显得效果不好，建议不要超过10，可酌情设置

     privatefloatmWateLevel = 0.5F;// 水位线(0~1)，初始水位线

     privatePath mPath;

 

     privateString flowNum = "1024M";

     privateString flowLeft = "还剩余";

 

     /**

     * @param context

     */

     publicWaterWaveView(Context context) {

          super(context);

          // TODO Auto-generated constructor stub

          mContext = context;

          init(mContext);

     }

 

     /**

     * @param context

     * @param attrs

     */

     publicWaterWaveView(Context context, AttributeSet attrs) {

          super(context, attrs);

          // TODO Auto-generated constructor stub

          mContext = context;

          init(mContext);

     }

 

     /**

     * @param context

     * @param attrs

     * @param defStyleAttr

     */

     publicWaterWaveView(Context context, AttributeSet attrs, intdefStyleAttr) {

          super(context, attrs, defStyleAttr);

          // TODO Auto-generated constructor stub

          mContext = context;

          init(mContext);

     }

   /**

* 设置水位线，0-1

   *

   */

   public setmWateLevel(float mWateLevel) {

        this.mWateLevel = mWateLevel ;

   }

 /**

* 设置振幅

 *

 */

 public setmAmplitude(floatmAmplitude) {

      this.mAmplitude=mAmplitude;

 }

 /**

* 设置中间文字

 *

 */

 public setWaveViewText(String floLeft, String flowNum) 

      this.floLeft=floLeft;

      this.flowNum=flowNum;

 }

 

     privatevoidinit(Context context) {

// 粗圆

          mRingPaint = newPaint();

          mRingPaint.setColor(mRingColor);

          mRingPaint.setAlpha(50);

          mRingPaint.setStyle(Paint.Style.STROKE);

          mRingPaint.setAntiAlias(true);

          mRingPaint.setStrokeWidth(mRingSTROKEWidth);

 

// 细圆

          mCirclePaint = newPaint();

          mCirclePaint.setColor(mCircleColor);

          mCirclePaint.setStyle(Paint.Style.STROKE);

          mCirclePaint.setAntiAlias(true);

          mCirclePaint.setStrokeWidth(mCircleSTROKEWidth);

 

// 横线（可不画）

//          linePaint = newPaint();

//          linePaint.setColor(mCircleColor);

//          linePaint.setStyle(Paint.Style.STROKE);

//          linePaint.setAntiAlias(true);

//          linePaint.setStrokeWidth(mLineSTROKEWidth);

 

// 1024M

          flowPaint = newPaint();

          flowPaint.setColor(mCircleColor);

          flowPaint.setStyle(Paint.Style.FILL);

          flowPaint.setAntiAlias(true);

          flowPaint.setTextSize(36);

 

// 还剩余

          leftPaint = newPaint();

          leftPaint.setColor(mCircleColor);

          leftPaint.setStyle(Paint.Style.FILL);

          leftPaint.setAntiAlias(true);

          leftPaint.setTextSize(18);

 

// 波浪

          mWavePaint = newPaint();

          mWavePaint.setStrokeWidth(1.0F);

          mWavePaint.setColor(mWaveColor);

//          mWavePaint.setAlpha(mAlpha); // 酌情设置透明度

          mPath = newPath();

 

          mHandler = newHandler() {

               @Override

               publicvoidhandleMessage(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

     protectedvoidonMeasure(intwidthMeasureSpec,intheightMeasureSpec) {

          intwidth = measure(widthMeasureSpec, true);

          intheight = measure(heightMeasureSpec, false);

          if(width < height) {

               setMeasuredDimension(width, width);

          }else{

               setMeasuredDimension(height, height);

          }

 

     }

 

     /**

     * @category 测量

     * @param measureSpec

     * @param isWidth

     * @return

     */

     privateintmeasure(intmeasureSpec,booleanisWidth) {

          intresult;

          intmode = MeasureSpec.getMode(measureSpec);

          intsize = MeasureSpec.getSize(measureSpec);

          intpadding = 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);

                    }

               }

          }

          returnresult;

     }

 

     @Override

     protectedvoidonSizeChanged(intw,inth,intoldw,intoldh) {

          // TODO Auto-generated method stub

          super.onSizeChanged(w, h, oldw, oldh);

          mScreenWidth = w;

          mScreenHeight = h;

     }

 

     @Override

     protectedvoidonDraw(Canvas canvas) {

          // TODO Auto-generated method stub

          super.onDraw(canvas);

          // 得到控件的宽高

          intwidth = getWidth();

          intheight = getHeight();

          setBackgroundColor(mBackgroundColor);

 

// 计算当前水位线与水平中线的距离

float centerOffset = Math.abs(mScreenWidth /2 *mWateLevel -mScreenWidth /4);

// 计算当前水位线与水平中线的角度

float horiAngle= (float)(Math.asin(centerOffset/(mScreenWidth /4) * 180 / Math.PI);

// 扇形的其实角度和扫过角度

float startAngle, sweepAngle;

if(mWateLevel > 0.5F){

 startAngle = 360F -horiAngle;

sweepAngle = 180F + 2 * horiAngle;

}else{

 startAngle =horiAngle;

sweepAngle = 180F - 2 * horiAngle;

}

          

// 中间横线可以不画

//canvas.drawLine(mScreenWidth * 3/8, mScreenHeight * 5/8

//                    mScreenWidth * 5/8, mScreenHeight * 5/8, linePaint);




// 画 1024M

        floatnum = flowPaint.measureText(flowNum);

        canvas.drawText(flowNum, mScreenWidth * 4/8- num / 2,mScreenHeight * 4/8, flowPaint);




// 画 还剩余

        floatleft = 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，水平静止的水位线

        if((!mStarted) || (mScreenWidth == 0) || (mScreenHeight == 0)) {

             RectF oval = newRectF(mScreenWidth / 4,mScreenHeight / 4,mScreenWidth * 3/4, mScreenHeight * 3/4);// 设置个新的长方形，扫描测量

             canvas.drawArc(oval,startAngle,sweepAngle,false, mWavePaint);

             return;

        }




        // 绘制,即水面静止时的高度

        RectF oval = newRectF(mScreenWidth / 4,mScreenHeight/4, mScreenWidth * 3/4, mScreenHeight * 3/4);// 设置个新的长方形，扫描测量

        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);

        floatf1 = mScreenHeight * (1.0F - (0.25F + mWateLevel / 2 )) - mAmplitude ;




// 当前水平线长度

float waveWidth = (float)Math.sqrt(mScreenWidth *mScreenWidth /16 - centerOffset * centerOffset );




// 与圆半径的偏移量

float offsetWidth = mScreenWidth * 4 - waveWidth ;




        inttop = (int) (f1 + mAmplitude);

        mPath.reset();




// 起始振动X坐标

        intstartX ，endX;

if(mWateLevel > 0.5F){

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) {

           intstartY = (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

     publicParcelable onSaveInstanceState() {

          // Force our ancestor class to save its state

          Parcelable superState = super.onSaveInstanceState();

          SavedState ss = newSavedState(superState);

          ss.progress = (int) c;

          returnss;

     }

 

     @Override

     publicvoidonRestoreInstanceState(Parcelable state) {

          SavedState ss = (SavedState) state;

          super.onRestoreInstanceState(ss.getSuperState());

          c = ss.progress;

     }

 

     @Override

     protectedvoidonAttachedToWindow() {

          super.onAttachedToWindow();

          // 关闭硬件加速，防止异常unsupported operation exception

          this.setLayerType(View.LAYER_TYPE_SOFTWARE,null);

     }

 

     @Override

     protectedvoidonDetachedFromWindow() {

          super.onDetachedFromWindow();

     }

 

     /**

     * @category 开始波动

     */

     publicvoidstartWave() {

          if(!mStarted) {

               this.c = 0L;

               mStarted = true;

               this.mHandler.sendEmptyMessage(0);

          }

     }

 

     /**

     * @category 停止波动

     */

     publicvoidstopWave() {

          if(mStarted) {

               this.c = 0L;

               mStarted = false;

               this.mHandler.removeMessages(0);

          }

     }

 

     /**

     * @category 保存状态

     */

     staticclassSavedState extendsBaseSavedState {

          intprogress;

 

          /**

          * Constructor called from {@link ProgressBar#onSaveInstanceState()}

          */

          SavedState(Parcelable superState) {

               super(superState);

          }

 

          /**

          * Constructor called from {@link #CREATOR}

          */

          privateSavedState(Parcel in) {

               super(in);

               progress = in.readInt();

          }

 

          @Override

          publicvoidwriteToParcel(Parcel out, intflags) {

               super.writeToParcel(out, flags);

               out.writeInt(progress);

          }

 

          publicstaticfinal Parcelable.Creator<Savedstate> CREATOR = newParcelable.Creator<Savedstate>() {

               publicSavedState createFromParcel(Parcel in) {

                    returnnewSavedState(in);

               }

 

               publicSavedState[] newArray(intsize) {

                    returnnewSavedState[size];

               }

          };

     }

 

}

java 代码调用：

  waterWaveView.setmWateLevel(progress);

waterWaveView.setmAmplitude(2);

waterWaveView.startWave();

waterWaveView.stopWave();