先看效果圖，這個加速球是動態(tài)的，并且當(dāng)調(diào)用了myView.setRefresh(0.8F);方法后可以從當(dāng)前值動態(tài)降到0再升到80%，期間可以看到顏色的變化。

源碼：

package com.ww.view;import android.content.Context; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Path.Direction; import android.graphics.Region; import android.graphics.Region.Op; import android.os.Handler; import android.os.Message; import android.view.View;import java.util.Timer; import java.util.TimerTask; //http://www.cnblogs.com/uncle2000/p/3796034.html public class SimpleWaveView extends View {private Paint Paint = new Paint();private int Color = -141309;private int Alpha = 255;private Path path = new Path();private Handler mHandler;private int Frequency = 128;private long c = 0L;private double PeakSpacing = 3.0D;private float SpeedH = 0.04F;private float SpeedV = 0.033F;private boolean FlagO = true;private boolean FlagR = false;private float Percentage = 0.6F;private float Refresh = 0.0F;private float Amplitude = 3.0F;private int ColorLevel1 = 0;private int ColorLevel2 = 0;private int ColorLevel3 = 0;private float Level1 = 0.0F;private float Level2 = 0.0F;public SimpleWaveView(Context context) {super(context);this.Paint.setStrokeWidth(1.0F);this.Paint.setAlpha(this.Alpha);this.mHandler = new Handler() {public void handleMessage(Message msg) {if ((msg.what != 0) && (msg.what == 1)) {if ((SimpleWaveView.this.Percentage > 0.0D)&& (SimpleWaveView.this.FlagO)) {SimpleWaveView.this.Percentage -= SimpleWaveView.this.SpeedV;} else if (SimpleWaveView.this.Percentage < SimpleWaveView.this.Refresh) {SimpleWaveView.this.FlagO = false;SimpleWaveView.this.Percentage += SimpleWaveView.this.SpeedV;} else {SimpleWaveView.this.FlagO = true;SimpleWaveView.this.FlagR = false;}}SimpleWaveView.this.invalidate();}};new Timer().schedule(new TimerTask() {public void run() {if (SimpleWaveView.this.FlagR)SimpleWaveView.this.mHandler.sendEmptyMessage(1);elseSimpleWaveView.this.mHandler.sendEmptyMessage(0);}}, 0L, this.Frequency);}protected void onDraw(Canvas canvas) {super.onDraw(canvas);canvas.save();int width = getWidth();int height = getHeight();if (this.Level1 == 0.0F)this.Paint.setColor(this.Color);else if (this.Level2 == 0.0F) {if ((this.Percentage >= 0.0F) && (this.Percentage < this.Level1))this.Paint.setColor(this.ColorLevel1);elsethis.Paint.setColor(this.ColorLevel2);} else if ((this.Percentage >= 0.0F) && (this.Percentage < this.Level1))this.Paint.setColor(this.ColorLevel1);else if ((this.Percentage >= this.Level1)&& (this.Percentage < this.Level2))this.Paint.setColor(this.ColorLevel2);else if ((this.Percentage >= this.Level2) && (this.Percentage <= 1.0F)) {this.Paint.setColor(this.ColorLevel3);}if ((width == 0) || (height == 0)) {canvas.drawRect(0.0F, height / 2, width, height, this.Paint);return;}if (this.c >= 8388607L) {this.c = 0L;}this.c += 1L;float f1 = height * (1.0F - this.Percentage);int top = (int) (f1 + this.Amplitude);this.path.reset();this.path.addCircle(width / 2, width / 2, width / 2, Path.Direction.CCW);canvas.clipPath(this.path, Region.Op.REPLACE);canvas.drawRect(0.0F, top, width, height, this.Paint);int stopX = 0;while (stopX < width) {int startY = (int) (f1 - this.Amplitude* Math.sin(3.141592653589793D* (2.0D * (stopX * this.PeakSpacing + (float) (this.c * width)* this.SpeedH * 2.0F)) / width));canvas.drawLine(stopX, startY, stopX, top, this.Paint);int i4 = stopX + 1;stopX = i4;}canvas.restore();}/*** Level1在(0%,100%)之間則ColorLevel1，ColorLevel2生效，有兩種顏色。Level2在(Level1,100%)之間則ColorLevel1，ColorLevel2，ColorLevel3生效，有三種顏色。* 該方法一旦生效，則setColor()方法自動失效。* @param ColorLevel1 [0%,Level1)之間的波浪的顏色* @param ColorLevel2 Level2生效的情況下，顯示為[Level1,Level2)之間的波浪的顏色，Level2不生效的情況下，顯示為[Level1,100%]之間的波浪的顏色。* @param ColorLevel3 [Level2,100%]之間的波浪的顏色* @param Level1 第一分界* @param Level2 第二分界，大于Level1生效，否則默認(rèn)失效。*/public void setWaveDiffrentColor(int ColorLevel1, int ColorLevel2,int ColorLevel3, float Level1, float Level2) {this.ColorLevel1 = ColorLevel1;this.ColorLevel2 = ColorLevel2;this.ColorLevel3 = ColorLevel3;if ((Level1 > 0.0F) && (Level1 < 1.0F))this.Level1 = Level1;if ((Level2 > Level1) && (Level2 < 1.0F))this.Level2 = Level2;}/*** 設(shè)置波浪的顏色，如果設(shè)置了setWaveDiffrentColor()方法則setColor()自動失效。* @param color波浪顏色*/public void setColor(int color) {this.Color = color;}/*** 從刷新前的高度降到0，然再升到刷新后的高度* @param refresh 刷新之后的高度*/public void setRefresh(float refresh) {if ((refresh >= 0.0F) && (refresh <= 1.0F)) {this.Refresh = refresh;this.FlagR = true;}}public float getAlpha() {return this.Alpha;}/*** 取值0~255之間，255代表不透明。* @param alpha 透明度*/public void setAlpha(int alpha) {if ((alpha >= 0) && (alpha <= 255))this.Alpha = alpha;}public double getPeakSpacing() {return this.PeakSpacing;}/*** 決定了兩個波峰之間的距離，該參數(shù)越大，波峰之間的距離越小* @param peakSpacing 波間距（反比）*/public void setPeakSpacing(double peakSpacing) {this.PeakSpacing = peakSpacing;}public float getPercentage() {return this.Percentage;}/*** 當(dāng)前波浪停留的位置。取值0~1之間。* @param percentage 百分比*/public void setPercentage(float percentage) {if ((percentage >= 0.0F) && (percentage <= 1.0F))this.Percentage = percentage;}public float getAmplitude() {return this.Amplitude;}/*** 波的高度* @param amplitude 幅度*/public void setAmplitude(float amplitude) {this.Amplitude = amplitude;}public float getSpeedH() {return this.SpeedH;}public float getSpeedV() {return this.SpeedV;}/*** * @param speedH 水平波浪的速度*/public void setSpeedH(float speedH) {this.SpeedH = speedH;}/*** * @param speedV 升降的速度*/public void setSpeedV(float speedV) {this.SpeedV = speedV;}}

使用方法：

LinearLayout ll;com.ww.view.SimpleWaveViewmyview =new com.ww.view.SimpleWaveView(getApplicationContext());ll=(LinearLayout)findViewById(R.id.ll); ll.addView(myview);myview.setWaveDiffrentColor(0xffff0f04, 0xfffdd803, 0xff00ed04, 0.3F, 0.6F);myview.setRefresh(0.8F);

API :

詳細(xì)API請參考：http://www.cnblogs.com/uncle2000/p/3796034.html

轉(zhuǎn)子2000的文章！！！

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