自定义进度条渐变色View

package com.jianke.stepCounter.Activity;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.SweepGradient;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

import com.jianke.doctor.R;

/**
 * @author xiaanming
 *
 */
@SuppressLint("DrawAllocation")
public class RoundProgressBar extends View {

    private Paint paint;

    public int roundColor;

    public int roundProgressColor;

    private int textColor;

    private float textSize;

    private float roundWidth;

    private int max;

    private int progress;

    public boolean textIsDisplayable;

    private int style;

    public static final int STROKE = 0;
    public static final int FILL = 1;

    public RoundProgressBar(Context context) {
        this(context, null);
    }

    public RoundProgressBar(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public RoundProgressBar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        paint = new Paint();

        TypedArray mTypedArray = context.obtainStyledAttributes(attrs,
                R.styleable.RoundProgressBar);

        roundColor = mTypedArray.getColor(
                R.styleable.RoundProgressBar_roundColor, Color.RED);
        roundProgressColor = mTypedArray.getColor(
                R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);
        textColor = mTypedArray.getColor(
                R.styleable.RoundProgressBar_textColor0, Color.GREEN);
        textSize = mTypedArray.getDimension(
                R.styleable.RoundProgressBar_textSize0, 15);
        roundWidth = mTypedArray.getDimension(
                R.styleable.RoundProgressBar_roundWidth, 5);
        max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);
        textIsDisplayable = mTypedArray.getBoolean(
                R.styleable.RoundProgressBar_textIsDisplayable, true);
        style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 0);

        mTypedArray.recycle();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        /***/
        int centre = getWidth() / 2; 
        int radius = (int) (centre - roundWidth / 2); 
 
        paint.setColor(getResources().getColor(R.color.proessround)); 
        paint.setStyle(Paint.Style.STROKE); 
        paint.setStrokeWidth(roundWidth); 
        paint.setAntiAlias(true); 
        paint.setShader(null);
        canvas.drawCircle(centre, centre, radius, paint);
        paint.setStrokeWidth(0);
        paint.setColor(textColor);
        paint.setTextSize(textSize);
        paint.setTypeface(Typeface.DEFAULT_BOLD); 
        int percent = (int) (((float) progress / (float) max) * 100); 
        float textWidth = paint.measureText(percent + "%"); 

        if (textIsDisplayable && percent != 0 && style == STROKE) {
            canvas.drawText(percent + "%", centre - textWidth / 2, centre
                    + textSize / 2, paint); 
        }

        paint.setStrokeWidth(roundWidth);
        // paint.setColor(roundProgressColor);
        int[] mColors = new int[] {// 渐变色数组
        0xFF0da7ff, 0xFF31da41, 0xFF31da41, 0xFF0da7ff ,0xFF0da7ff  };
        Shader sg = new SweepGradient(0, 0, mColors, null);

        SweepGradient sg2 = new SweepGradient(centre, centre, getResources()
                .getColor(R.color.proessstartcolor), getResources().getColor(
                R.color.proessendcolor));
        paint.setShader(sg);
        RectF oval = new RectF(centre - radius, centre - radius, centre
                + radius, centre + radius);

        switch (style) {
        case STROKE: {
            paint.setStyle(Paint.Style.STROKE);
            canvas.drawArc(oval, -90, 360 * progress / max, false, paint); // ���ݽ��Ȼ�Բ��
            break;
        }
        case FILL: {
            paint.setStyle(Paint.Style.FILL_AND_STROKE);
            if (progress != 0)
                canvas.drawArc(oval, 0, 360 * progress / max, true, paint); // ���ݽ��Ȼ�Բ��
            break;
        }
        }
    }

    public synchronized int getMax() {
        return max;
    }

    /**
     * @param max
     */
    public synchronized void setMax(int max) {
        if (max < 0) {
            throw new IllegalArgumentException("max not less than 0");
        }
        this.max = max;
    }

    /**
     * @return
     */
    public synchronized int getProgress() {
        return progress;
    }

    /**
     *
     * @param progress
     */
    public synchronized void setProgress(int progress) {
        if (progress < 0) {
            throw new IllegalArgumentException("progress not less than 0");
        }
        if (progress > max) {
            progress = max;
        }
        if (progress <= max) {
            this.progress = progress;
            postInvalidate();
        }

    }

    public int getCricleColor() {
        return roundColor;
    }

    public void setCricleColor(int cricleColor) {
        this.roundColor = cricleColor;
    }

    public int getCricleProgressColor() {
        return roundProgressColor;
    }

    public void setCricleProgressColor(int cricleProgressColor) {
        this.roundProgressColor = cricleProgressColor;
    }

    public int getTextColor() {
        return textColor;
    }

    public void setTextColor(int textColor) {
        this.textColor = textColor;
    }

    public float getTextSize() {
        return textSize;
    }

    public void setTextSize(float textSize) {
        this.textSize = textSize;
    }

    public float getRoundWidth() {
        return roundWidth;
    }

    public void setRoundWidth(float roundWidth) {
        this.roundWidth = roundWidth;
    }

}

使用方法：

final RoundProgressBar fff = new RoundProgressBar(
StepCounterHomePageActivity.this);

fff.setRoundWidth(boardwidth);

fff.roundColor = getResources().getColor(R.color.proessround);

fff.setClickable(false);
fff.textIsDisplayable = false;

relativeLayout2.addView(fff);