自定义圆弧进度条

package com.shensou.jmzx.widget;


import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Shader;
import android.graphics.Paint.Cap;
import android.graphics.Paint.Style;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

/**
 * 自定义圆弧进度条
 */
public class ProgressView extends View {
   //分段颜色
   private static final int[] SECTION_COLORS = {  0xffEE1111,
         0xffF0F031 };
   private static final String[] ALARM_LEVEL = { "安全", "低危", "中危", "高危" };
   private float maxCount;
   private float currentCount;
   private String score ="";
   private String crrentLevel="";
   private Paint mPaint;
   private Paint mTextPaint;
   private int mWidth, mHeight;
   public ProgressView(Context context, AttributeSet attrs, int defStyleAttr) {
      super(context, attrs, defStyleAttr);
      init(context);
   }
   public ProgressView(Context context, AttributeSet attrs) {
      this(context, attrs, 0);
   }
   public ProgressView(Context context) {
      this(context, null);
   }
   private void init(Context context) {
      mPaint = new Paint();
      mTextPaint = new Paint();
   }
   @Override
   protected void onDraw(Canvas canvas) {
      super.onDraw(canvas);
      initPaint();
      RectF rectBlackBg = new RectF(40.0f, 40.0f, mWidth*1.0f - 40.0f, mHeight*1.0f - 40.0f);
      canvas.drawArc(rectBlackBg, 0, 360, false, mPaint);
      mPaint.setColor(Color.BLACK);
      canvas.drawText(score, mWidth / 2, mHeight / 2, mTextPaint);
      mTextPaint.setTextSize(40);
      canvas.drawText(crrentLevel, mWidth / 2, mHeight / 2 + 50,
               mTextPaint);
//    if (crrentLevel != null) {
//       canvas.drawText(crrentLevel, mWidth / 2, mHeight / 2 + 50,
//             mTextPaint);
//    }
      float section = currentCount / maxCount;
//    if (section <= 1.0f / 3.0f) {
//       if (section != 0.0f) {
//          mPaint.setColor(SECTION_COLORS[0]);
//       } else {
//          mPaint.setColor(Color.TRANSPARENT);
//       }
//    } else {
//       int count = (section <= 1.0f / 3.0f * 2) ? 2 : 3;
//       int[] colors = new int[count];
//       System.arraycopy(SECTION_COLORS, 0, colors, 0, count);
////         float[] positions = new float[count];
////         if (count == 2) {
////            positions[0] = 0.0f;
////            positions[1] = 1.0f - positions[0];
////         } else {
////            positions[0] = 0.0f;
////            positions[1] = (maxCount / 3) / currentCount;
////            positions[2] = 1.0f - positions[0] * 2;
////         }
////         positions[positions.length - 1] = 1.0f;
//       LinearGradient shader = new LinearGradient(3, 3, (mWidth - 3)
//             * section, mHeight - 3, colors, null,Shader.TileMode.MIRROR
//             );
//       mPaint.setShader(shader);
//    }
      LinearGradient shader = new LinearGradient(3, 3, (mWidth - 3)
            * section, mHeight - 3, SECTION_COLORS, null,Shader.TileMode.MIRROR
      );
      mPaint.setShader(shader);
      canvas.drawArc(rectBlackBg, -90, section * 360, false, mPaint);
   }
   private void initPaint() {
      mPaint.setAntiAlias(true);
      mPaint.setStrokeWidth((float) 30.0);
      mPaint.setStyle(Style.STROKE);
      mPaint.setStrokeCap(Cap.ROUND);
      mPaint.setColor(Color.TRANSPARENT);
      mTextPaint.setAntiAlias(true);
      mTextPaint.setStrokeWidth((float) 3.0);
      mTextPaint.setTextAlign(Paint.Align.CENTER);
      mTextPaint.setTextSize(50);
      mTextPaint.setColor(Color.BLACK);
   }
   private int dipToPx(int dip) {
      float scale = getContext().getResources().getDisplayMetrics().density;
      return (int) (dip * scale + 0.5f * (dip >= 0 ? 1 : -1));
   }
   public String getScore() {
      return score;
   }
   public String getCrrentLevel() {
      return crrentLevel;
   }
   public void setCrrentLevel(String crrentLevel) {
      this.crrentLevel = crrentLevel;
   }
   public float getMaxCount() {
      return maxCount;
   }
   public float getCurrentCount() {
      return currentCount;
   }
   public void setCenterText(String text) {
      this.score = text;
      invalidate();
   }
   /***
    * 设置最大的进度值
    *
    * @param maxCount
    */
   public void setMaxCount(float maxCount) {
      this.maxCount = maxCount;
   }
   /***
    * 设置当前的进度值
    *
    * @param currentCount
    */
   public void setCurrentCount(float currentCount) {
      this.currentCount = currentCount > maxCount ? maxCount : currentCount;
      invalidate();
   }
   @Override
   protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
      int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
      int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
      int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
      int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
      if (widthSpecMode == MeasureSpec.EXACTLY
            || widthSpecMode == MeasureSpec.AT_MOST) {
         mWidth = widthSpecSize;
      } else {
         mWidth = 0;
      }
      if (heightSpecMode == MeasureSpec.AT_MOST
            || heightSpecMode == MeasureSpec.UNSPECIFIED) {
         mHeight = heightMeasureSpec;
      } else {
         mHeight = heightSpecSize;
      }
      setMeasuredDimension(mWidth, mHeight);
   }
}

使用(使用两个progressview）：

progressView.setCurrentCount(value);

xml:

<com.shensou.easywatch.widget.ProgressView
    android:id="@+id/progressView"
    android:layout_width="150dp"
    android:layout_height="150dp"
    android:layout_centerInParent="true"
    />