android自己定义渐变进度条

项目中须要用到一个弧形渐变的进度条，通过android自带是不能实现的。我是没有找到实现的方法，有大神知道的能够指点。效果图是以下这种

这是通过继承VIew来绘制出来的，网上也有相似的，可是代码那是相当的累赘，并且创建了非常多没用的对象，给内存管理带来负担

我在这把自己定义的View代码贴出来了，用到的话能够加以參考

public class SpringProgressView extends View {

  /**
   * 分段颜色
   */

  private static final int[] SECTION_COLORS = {Color.RED, Color.parseColor("#ffa000"), Color.YELLOW};

  /**
   * 进度条最大值
   */
  private float maxCount;
  /**
   * 进度条当前值
   */
  private float currentCount;
  /**
   * 画笔
   */
  private Paint mPaint;
  private int mWidth, mHeight;

  private RectF rectBg = new RectF();
  private RectF rectProgressBg = new RectF();
  private LinearGradient shader;

  public SpringProgressView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    initView(context);
  }

  public SpringProgressView(Context context, AttributeSet attrs) {
    super(context, attrs);
    initView(context);
  }

  public SpringProgressView(Context context) {
    super(context);
    initView(context);
  }

  private void initView(Context context) {
    mPaint = new Paint();
  }

  @Override
  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
    super.onLayout(changed, left, top, right, bottom);
    mHeight = bottom - top;
    mWidth = right - left;
    rectBg.set(0, 0,mWidth, mHeight);
  }

  @Override
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    float section = currentCount / maxCount;
    if (shader == null) {
      shader = new LinearGradient(0, 0, mWidth, mHeight, SECTION_COLORS, null, Shader.TileMode.CLAMP);
    }
    mPaint.setShader(shader);
    mPaint.setAntiAlias(true);
    mPaint.setStyle(Paint.Style.STROKE);

    //绘制进度条外側边框
    int round = mHeight*2/3;
    canvas.drawRoundRect(rectBg, round, round, mPaint);

    //绘制进度条
    mPaint.setStyle(Paint.Style.FILL);
    int pl=(int)(mWidth*(1-section));
    rectProgressBg.set(pl, 0, mWidth, mHeight);
    canvas.drawRoundRect(rectProgressBg, round, round, mPaint);
  }

  /*
     * 设置最大的进度值
     */
  public void setMaxCount(float maxCount) {
    this.maxCount = maxCount;
  }

  /**
   * 设置当前的进度值
   */
  public void setCurrentCount(float currentCount) {
    this.currentCount = currentCount > maxCount ? maxCount : currentCount;
    invalidate();
  }

  public float getMaxCount() {
    return maxCount;
  }

  public float getCurrentCount() {
    return currentCount;
  }
}

    以上就是自己定义的view部分，直接在布局文件里引用就能够了。在Activity中设置该进度条的最大值和和当前进度值，就能够完美实现了

    ​