android自定义波浪加载动画的实现代码

package com.example.wh.myapplication;
 
 
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.support.annotation.Nullable;
import android.support.v4.content.ContextCompat;
import android.util.AttributeSet;
import android.view.View;
 
import java.text.DecimalFormat;
public class WaveView extends View {
 
 /**
 * 默认波浪1长度
 */
 private final int WAVE_LENGTH1 = 600;
 
 /**
 * 默认波浪1高度
 */
 private final int WAVE_HEIGHT1 = 30;
 
 /**
 * 波浪1高度
 */
 private int mWaveHeight1 = WAVE_HEIGHT1;
 
 /**
 * 波浪1长度
 */
 private int mWaveLenght1 = WAVE_LENGTH1;
 
 /**
 * 默认波浪1颜色
 */
 private final int WAVE_COLOR1 = Color.parseColor("#0000ff");
 
 /**
 * 默认边框颜色
 */
 private final int BORDER_COLOR = Color.parseColor("#800000ff");
 
 /**
 * 默认文字颜色
 */
 private final int DEFAULT_TEXT_COLOR = Color.parseColor("#ff0000");
 /**
 * 默认文字大小
 */
 private final int DEFAULT_TEXT_SIZE = 30;
 
 /**
 * 文字颜色
 */
 private int mTextColor = DEFAULT_TEXT_COLOR;
 /**
 * 文字大小
 */
 private int mTextSize = DEFAULT_TEXT_SIZE;
 
 /**
 * 波浪1颜色
 */
 private int mWaveColor1 = WAVE_COLOR1;
 
 /**
 * 默认每一次重绘时波峰1的移动的距离，实现移动效果
 */
 private final int WAVE_OFFSET1 = 8;
 
 /**
 * 每一次重绘时波峰1的移动的距离，实现移动效果
 */
 private int mOffset1 = WAVE_OFFSET1;
 
 /**
 * 默认边框宽度
 */
 private final int BORDER_WIDTH = 2;
 
 /**
 * 边框颜色
 */
 private int mBorderColor = BORDER_COLOR;
 
 /**
 * 边框宽度
 */
 private int mBorderWidth = BORDER_WIDTH;
 
 /**
 * 绘制的高度，百分比。0表示内有高度，1表示全部高度
 */
 private float mPrecent = 0.5f;
 
 /**
 * 形状枚举，暂时只支持矩形和圆形，可扩展
 */
 public enum ShowShape {
 RECT
 }
 
 /**
 * 形状默认矩形
 */
 private ShowShape mShape = ShowShape.RECT;
 
 /**
 * 默认两次重绘之间间隔的时间，5毫秒
 */
 private final int DEFAULT_TIME = 5;
 
 /**
 * 两次重绘之间间隔的时间，毫秒。
 */
 private int mTime = DEFAULT_TIME;
 
 /**
 * 设置两次重绘之间的间隔时间，毫秒
 *
 * @param time
 * @return
 */
 public WaveView setTime(int time) {
 this.mTime = time;
 return this;
 }
 
 /**
 * 波浪1画笔
 */
 private Paint mWavePaint1;
 
 /**
 * 边框画笔
 */
 private Paint mBorderPaint;
 /**
 * 文字画笔
 */
 private Paint mTextPaint;
 
 /**
 * 波浪1路径
 */
 private Path mWavePath1;
 
 /**
 * 定义数字格式转行类
 */
 private DecimalFormat mFormat;
 
 /**
 * 控件的宽度
 */
 private int mWidth;
 /**
 * 控件的高度
 */
 private int mHeight;
 
 /**
 * 水位上升时不断变化的 y 坐标
 */
 private float mChangeY;
 
 /**
 * 水位最终的高度，通过控件的高度和百分比计算出来
 */
 private float mFinalY;
 
 /**
 * 波峰的个数
 */
 private int mWaveCount = 8;
 
 /**
 * 重置标记，开始为重置状态
 */
 private boolean isReset = true;
 
 
 /**
 * 当前百分比
 */
 private float mCurrentPrecent = 0.0f;
 
 /**
 * 重绘值波峰移动距离的和
 */
 private int mMoveSum1;
 
 /**
 * 能够绘制标记位，开始不能绘制
 */
 private boolean invalidateFlag = false;
 
 /**
 * 百分比改变监听
 */
 private PrecentChangeListener mPrecentChangeListener;
 
 
 /**
 * 百分比改变监听接口
 */
 public interface PrecentChangeListener {
 /**
  * 百分比发生改变时调用的方法
  *
  * @param precent 当前的百分比，格式 0.00 范围 [0.00 , 1.00]
  */
 void precentChange(double precent);
 }
 
 
 public WaveView(Context context) {
 this(context, null);
 }
 
 public WaveView(Context context, @Nullable AttributeSet attrs) {
 this(context, attrs, 0);
 }
 
 public WaveView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
 super(context, attrs, defStyleAttr);
 
 initAttrs(context, attrs); // 获取布局文件中dingy9i的属性
 init();
 }
 
 //获取布局中的初始属性
 private void initAttrs(Context context, AttributeSet attrs) {
 TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.WaveView);
 mWaveLenght1 = typedArray.getInteger(R.styleable.WaveView_wave1Length, WAVE_LENGTH1);
 mWaveHeight1 = typedArray.getInteger(R.styleable.WaveView_wave1Height, WAVE_HEIGHT1);
 mWaveColor1 = typedArray.getColor(R.styleable.WaveView_wave1Color, WAVE_COLOR1);
 mOffset1 = typedArray.getInteger(R.styleable.WaveView_wave1Offset, WAVE_OFFSET1);
 
 mBorderWidth = typedArray.getDimensionPixelSize(R.styleable.WaveView_borderWidth, BORDER_WIDTH);
 mBorderColor = typedArray.getColor(R.styleable.WaveView_borderColor, BORDER_COLOR);
 
 mTime = typedArray.getInteger(R.styleable.WaveView_intervalTime, DEFAULT_TIME);
 mPrecent = typedArray.getFloat(R.styleable.WaveView_precent, 0.5f);
 /**
  * 绘制的高度，百分比。0表示内有高度，1表示全部高度
  */
 int shapeValue = typedArray.getInteger(R.styleable.WaveView_showShape, 0);
 
 mShape = ShowShape.RECT;
 typedArray.recycle();
 }
 
 private void init() {
 mWavePaint1 = new Paint(Paint.ANTI_ALIAS_FLAG);
 mBorderPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
 mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
 
 mWavePath1 = new Path();
 
 mWavePaint1.setColor(mWaveColor1);
 mWavePaint1.setStyle(Paint.Style.FILL);
 
 mBorderPaint.setColor(mBorderColor);
 mBorderPaint.setStrokeWidth(mBorderWidth);
 mBorderPaint.setStyle(Paint.Style.STROKE);
 
 
 mTextPaint.setColor(mTextColor);
 mTextPaint.setTextSize(mTextSize);
 
 // 定义数字显示个格式
 mFormat = new DecimalFormat("###,###,##0.00");
 }
 
 @Override
 protected void onSizeChanged(int w, int h, int oldw, int oldh) {
 super.onSizeChanged(w, h, oldw, oldh);
 mWidth = w;
 mHeight = h;
 
 mChangeY = mHeight;
 // 计算波峰个数，为了实现移动效果，保证至少绘制两个波峰
 mFinalY = (1 - mPrecent) * mHeight; // 计算水位最终高度
 }
 
 @Override
 protected void onDraw(Canvas canvas) {
 mWavePath1.reset();
 
 
 if (mBorderWidth > 0) {
  // 边框大于0,表示需要绘制边框
  if(mShape == ShowShape.RECT) {
  canvas.drawRect(0, 0, mWidth, mHeight, mBorderPaint);
  }
 }
 
 mWavePath1.moveTo(-mWaveLenght1, mChangeY);
 
 if (!isReset) { // 判断重置标记
  // 利用贝塞尔曲线绘制波浪
  for (int i = 0; i < mWaveCount; i++) {
  // 绘制波浪1的曲线
  mWavePath1.quadTo((-mWaveLenght1 * 3 / 4) + (i * mWaveLenght1) + mMoveSum1, mChangeY + mWaveHeight1, (-mWaveLenght1 / 2) + (i * mWaveLenght1) + mMoveSum1, mChangeY);
  mWavePath1.quadTo((-mWaveLenght1 * 1 / 4) + (i * mWaveLenght1) + mMoveSum1, mChangeY - mWaveHeight1, (i * mWaveLenght1) + mMoveSum1, mChangeY);
 
  }
 
  // 不断改变高度，实现逐渐水位逐渐上涨效果
  mChangeY -= 1;
  if (mChangeY < mFinalY) mChangeY = mFinalY;
 
  // 波峰1往右移动，波峰2往左移动
  mMoveSum1 += mOffset1;
  if (mMoveSum1 >= mWaveLenght1) mMoveSum1 = 0;
 
  // 填充矩形，让上涨之后的水位下面填充颜色
  mWavePath1.lineTo(mWidth, mHeight);
  mWavePath1.lineTo(0, mHeight);
  mWavePath1.close();
 
  canvas.drawPath(mWavePath1, mWavePaint1);
 } else {
  // 是重置
  canvas.drawColor(Color.TRANSPARENT);
 }
 
 // 计算当前的百分比
 mCurrentPrecent = 1 - mChangeY / mHeight;
 // 格式化数字格式
 String format1 = mFormat.format(mCurrentPrecent);
 // 绘制文字，将百分比绘制到界面。此处用的是 "50%" 的形式，可以根据需求改变格式
 double parseDouble = Double.parseDouble(format1);
 canvas.drawText((int) (parseDouble * 100) + " %", (mWidth - mTextPaint.measureText(format1)) / 2, mHeight / 5, mTextPaint);
 // 监听对象不为null并且没有达到设置高度时，调用监听方法
 if (mPrecentChangeListener != null && mChangeY != mFinalY) {
  mPrecentChangeListener.precentChange(parseDouble);
 }
 
 //高度到达设置高度
 if (mChangeY == mFinalY){
  canvas.drawColor(ContextCompat.getColor(getContext(), R.color.bowencolor));
 }
 
 // 判断绘制标记
 if (invalidateFlag) postInvalidateDelayed(mTime);
 }
 
 /**
 * 设置边框宽度
 *
 * @param borderWidth
 * @return
 */
 public WaveView setBorderWidth(int borderWidth) {
 this.mBorderWidth = borderWidth;
 return this;
 }
 
 /**
 * 设置波浪1颜色
 *
 * @param waveColor1
 * @return
 */
 public WaveView setWaveColor1(int waveColor1) {
 this.mWaveColor1 = waveColor1;
 return this;
 }
 
 /**
 * 设置边框颜色
 *
 * @param borderColor
 * @return
 */
 public WaveView setBorderColor(int borderColor) {
 this.mBorderColor = borderColor;
 return this;
 }
 
 /**
 * 设置文字颜色
 *
 * @param textColor
 * @return
 */
 public WaveView setTextColor(int textColor) {
 this.mTextColor = textColor;
 return this;
 }
 
 /**
 * 设置百分比
 *
 * @param precent
 * @return
 */
 public WaveView setPrecent(float precent) {
 this.mPrecent = precent;
 return this;
 }
 
 
 /**
 * 设置文字大小
 *
 * @param textSize
 * @return
 */
 public WaveView setTextSize(int textSize) {
 this.mTextSize = textSize;
 return this;
 }
 
 
 /**
 * 设置当前显示形状
 *
 * @param shape
 * @return
 */
 public WaveView setShape(ShowShape shape) {
 this.mShape = shape;
 return this;
 }
 
 /**
 * 开始
 */
 public void start() {
 invalidateFlag = true;
 isReset = false;
 postInvalidateDelayed(mTime);
 }
 
 /**
 * 暂停
 */
 public void stop() {
 invalidateFlag = false;
 isReset = false;
 }
 
 /**
 * 重置
 */
 public void reset() {
 invalidateFlag = false;
 isReset = true;
 mChangeY = mHeight;
 postInvalidate();
 }
}

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <!--自定义水波纹效果属性-->
 <declare-styleable name="WaveView">
 <!--波浪1的长度、高度、颜色和每次重绘的偏移量-->
 <attr name="wave1Length" format="integer" />
 <attr name="wave1Height" format="integer" />
 <attr name="wave1Color" format="color" />
 <attr name="wave1Offset" format="integer" />
 
 <!--边框的宽度和颜色-->
 <attr name="borderWidth" format="dimension" />
 <attr name="borderColor" format="color" />
 <!--文字的大小和颜色-->
 <attr name="textColor" format="color" />
 <attr name="textSize" format="dimension" />
 <!--水位高度的百分比-->
 <attr name="precent" format="float" />
 <!--两次重绘的间隔时间-->
 <attr name="intervalTime" format="integer" />
 <!--控件的显示形状，rect矩形、circle圆形-->
 <attr name="showShape" format="enum">
  <enum name="rect" value="0" />
  <enum name="circle" value="1" />
 </attr>
 </declare-styleable>
</resources>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 tools:context="com.example.wh.myapplication.MainActivity">
 
 <com.example.wh.myapplication.WaveView
 android:id="@+id/waveview1"
 android:layout_width="200dp"
 android:layout_height="200dp" />
 
 <LinearLayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_marginTop="30dp"
 android:orientation="horizontal">
 
 <Button
  android:id="@+id/bt_start"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:text="开始"/>
 
 <Button
  android:id="@+id/bt_stop"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:text="暂停"/>
 
 <Button
  android:id="@+id/bt_reset"
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:text="重置"/>
 </LinearLayout>
</LinearLayout>

package com.example.wh.myapplication;
 
import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
 
public class MainActivity extends AppCompatActivity {
 
 private WaveView waveview1;
 private Button btStart;
 private Button btStop;
 private Button btReset;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 
 waveview1 = (WaveView) findViewById(R.id.waveview1);
 
 btStart = (Button) findViewById(R.id.bt_start);
 btStop = (Button) findViewById(R.id.bt_stop);
 btReset = (Button) findViewById(R.id.bt_reset);
 
 // 代码设置相关属性
 waveview1.setBorderWidth(2)
  .setWaveColor1(Color.RED)
  .setBorderColor(Color.GREEN)
  .setTextColor(Color.BLUE)
  .setShape(WaveView.ShowShape.RECT)
  .setTextSize(36)
  .setPrecent(1f)//设置水波纹的百分比
  .setTime(2);
 
 btStart.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
  waveview1.start();
  }
 });
 
 btStop.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
  waveview1.stop();
  }
 });
 
 btReset.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
  waveview1.reset();
  }
 });
 }
}