Android自定义环形LoadingView效果

public interface OnValueChangeListener {  void onValueChange(float value);}

/** * @author Chuck */public class InternalCirclePainterImp2 implements InternalCirclePainter {  private RectF internalCircle;//画出圆弧时,圆弧的外切矩形  private Paint internalCirclePaint;  private int color;  private float startAngle = 270f;  int arcQuantity=100;//等分(圆弧加间隔),比如arcQuantity=100时,表示将有100个圆弧,和100个空白间隔  float ratio=0.5f;//每段圆弧与圆弧加间隔之和的比例,ratio=0.5表示每个圆弧与相邻的间隔弧度比是1:1  private int width;  private int height;  private int internalStrokeWidth = 48;//圆环宽度  public InternalCirclePainterImp2(int color, int progressStrokeWidth, int arcQuantity,float ratio) {    this.color = color;    this.internalStrokeWidth = progressStrokeWidth;    this.arcQuantity = arcQuantity;    if(ratio>0&&ratio<1){      this.ratio = ratio;    }    init();  }  private void init() {    initExternalCirclePainter();  }  private void initExternalCirclePainter() {    internalCirclePaint = new Paint();    internalCirclePaint.setAntiAlias(true);    internalCirclePaint.setStrokeWidth(internalStrokeWidth);    internalCirclePaint.setColor(color);    internalCirclePaint.setStyle(Paint.Style.STROKE);  }  //圆弧外切矩形  private void initExternalCircle() {    internalCircle = new RectF();    float padding = internalStrokeWidth * 0.5f;    internalCircle.set(padding, padding , width - padding, height - padding);    initExternalCirclePainter();  }  @Override  public void draw(Canvas canvas) {    float eachAngle=360f/arcQuantity;    float eachArcAngle=eachAngle*ratio;    for(int i=0;i<arcQuantity*2;i++){      if(i%2==0){//遇到偶数就画圆弧,基数则跳过        canvas.drawArc(internalCircle, startAngle+eachAngle*i/2, eachArcAngle, false, internalCirclePaint);      }      else{        continue;      }    }  }  public void setColor(int color) {    this.color = color;    internalCirclePaint.setColor(color);  }  @Override  public int getColor() {    return color;  }  @Override  public void onSizeChanged(int height, int width) {    this.width = width;    this.height = height;    initExternalCircle();  }}

/** * @author Chuck */public class ProgressPainterImp2 implements ProgressPainter {  private RectF progressCircle;  private Paint progressPaint;  private int color = Color.RED;  private float startAngle = 270f;  private int internalStrokeWidth = 48;  private float min;  private float max;  private int width;  private int height;  private int currentPecent;//当前的百分比  int arcQuantity=100;//等分(圆弧加间隔),比如arcQuantity=100时,表示将有100个圆弧,和100个空白间隔  float ratio=0.5f;//每段圆弧与圆弧加间隔之和的比例,ratio=0.5表示每个圆弧与相邻的间隔弧度比是1:1  public ProgressPainterImp2(int color, float min, float max, int progressStrokeWidth, int arcQuantity,float ratio) {    this.color = color;    this.min = min;    this.max = max;    this.internalStrokeWidth = progressStrokeWidth;    this.arcQuantity = arcQuantity;    this.ratio = ratio;    init();    Log.e("ProgressPainterImp","构造函数执行");  }  private void init() {    initInternalCirclePainter();  }  private void initInternalCirclePainter() {    progressPaint = new Paint();    progressPaint.setAntiAlias(true);    progressPaint.setStrokeWidth(internalStrokeWidth);    progressPaint.setColor(color);    progressPaint.setStyle(Paint.Style.STROKE);  }  //初始化外切的那个矩形  private void initInternalCircle() {    progressCircle = new RectF();    float padding = internalStrokeWidth * 0.5f;    progressCircle.set(padding, padding , width - padding, height - padding);    initInternalCirclePainter();  }  @Override  public void draw(Canvas canvas) {    float eachAngle=360f/arcQuantity;    float eachArcAngle=eachAngle*ratio;    int quantity=2*arcQuantity*currentPecent/100;    for(int i=0;i<quantity;i++){      if(i%2==0){//遇到偶数就画圆弧,基数则跳过        canvas.drawArc(progressCircle, startAngle+eachAngle*i/2, eachArcAngle, false, progressPaint);      }      else{        continue;      }    }  }  public float getMin() {    return min;  }  public void setMin(float min) {    this.min = min;  }  public float getMax() {    return max;  }  public void setMax(float max) {    this.max = max;  }  public void setValue(float value) {    this.currentPecent = (int) (( 100f * value) / max);  }  @Override  public void onSizeChanged(int height, int width) {    Log.e("ProgressPainterImp","onSizeChanged执行");    this.width = width;    this.height = height;    initInternalCircle();  }  public int getColor() {    return color;  }  public void setColor(int color) {    this.color = color;    progressPaint.setColor(color);  }}

<declare-styleable name="CircularLoadingView">  <attr name="base_color" format="color" /> <!--内层圆环的颜色-->  <attr name="progress_color" format="color" /><!--进度圆环的颜色-->  <attr name="max" format="float" /><!--最小值-->  <attr name="min" format="float" /><!--最大值-->  <attr name="duration" format="integer" /><!--动画时长-->  <attr name="progress_stroke_width" format="integer" /><!--圆环宽度-->  <!--等分(圆弧加间隔),比如arcQuantity=100时,表示将有100个圆弧,和100个空白间隔-->  <attr name="argQuantity" format="integer" />    <!--每段圆弧与圆弧加间隔之和的比例,ratio=0.5表示每个圆弧与相邻的间隔弧度比是1:1-->  <attr name="ratio" format="float" /></declare-styleable>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout  xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:paddingBottom="@dimen/activity_vertical_margin"  android:paddingLeft="@dimen/activity_horizontal_margin"  android:paddingRight="@dimen/activity_horizontal_margin"  android:paddingTop="@dimen/activity_vertical_margin"  xmlns:custom="http://schemas.android.com/apk/res-auto"  android:background="#ffffff"  >  <!--自定义控件,继承RelativeLayout-->  <qdong.com.mylibrary.CircularLoadingView    android:id="@+id/simple"    custom:base_color="@color/pager_bg"    custom:min="0"    custom:max="100"    custom:argQuantity="100"    custom:ratio="0.6"    custom:progress_color="@android:color/holo_green_light"    custom:progress_icon="@mipmap/ic_launcher"    custom:duration="1000"    custom:progress_stroke_width="28"    android:layout_centerInParent="true"    android:layout_width="200dp"    android:layout_height="200dp">    <RelativeLayout      android:layout_centerInParent="true"      android:layout_width="match_parent"      android:layout_height="match_parent">              <TextView          android:layout_centerInParent="true"          android:textSize="20sp"          android:layout_centerHorizontal="true"          android:id="@+id/number"          android:text="0"          android:gravity="center"          android:textColor="@color/pager_bg"          android:layout_width="wrap_content"          android:layout_height="wrap_content" />    </RelativeLayout>  </qdong.com.mylibrary.CircularLoadingView>  <Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="Set_Value"    android:id="@+id/button"    android:layout_alignParentBottom="true"    android:layout_alignParentStart="true"/>  <Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="Animation"    android:id="@+id/button3"    android:layout_alignTop="@+id/button"    android:layout_alignParentEnd="true"/></RelativeLayout>

findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View view) {    try {      mDashedCircularProgress.setValue(66);//没有动画的,直接设置    } catch (Exception e) {      e.printStackTrace();    }  }});findViewById(R.id.button3).setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View view) {    try {      mDashedCircularProgress.setValue(0);//无动画,归零      mDashedCircularProgress.setValueWithAnimation(100,2000);//带动画    } catch (Exception e) {      e.printStackTrace();    }  }});