RoundProgressBar.java

package com.roboo.like.netease.view;

import android.R.integer;
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.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

import com.roboo.like.netease.R;

public class RoundProgressBar extends View
{
	/**
	 * 画笔对象的引用
	 */
	private Paint paint;

	/**
	 * 圆环的颜色
	 */
	private int roundColor;

	/**
	 * 圆环进度的颜色
	 */
	private int roundProgressColor;

	/**
	 * 中间进度百分比的字符串的颜色
	 */
	private int textColor;

	/**
	 * 中间进度百分比的字符串的字体
	 */
	private float textSize;

	/**
	 * 圆环的宽度
	 */
	private float roundWidth;

	/**
	 * 最大进度
	 */
	private int max;

	/**
	 * 当前进度
	 */
	private int progress;
	/**
	 * 是否显示中间的进度
	 */
	private boolean textIsDisplayable;

	/**
	 * 进度的风格，实心或者空心
	 */
	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);
		// 获取自定义属性和默认值
		roundColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundColor, Color.RED);
		roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);
		textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);
		textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 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_style, 0);
		mTypedArray.recycle();
	}

	@Override
	protected void onDraw(Canvas canvas)
	{
		super.onDraw(canvas);
		/**
		 * 画最外层的大圆环
		 */
		int centerX = getWidth() / 2; // 获取圆心的x坐标
		int centerY = getHeight()/2; // 获取圆心的y坐标
		int radius = (int) (centerX - roundWidth / 2); // 圆环的半径
		paint.setColor(roundColor); // 设置圆环的颜色
		paint.setStyle(Paint.Style.STROKE); // 设置空心
		paint.setStrokeWidth(roundWidth); // 设置圆环的宽度
		paint.setAntiAlias(true); // 消除锯齿
		canvas.drawCircle(centerX, centerY, radius, paint); // 画出圆环
		Log.e("log", centerX + "");
		/**
		 * 画进度百分比
		 */
		paint.setStrokeWidth(0);
		paint.setColor(textColor);
		paint.setTextSize(textSize);
		paint.setTypeface(Typeface.DEFAULT_BOLD); // 设置字体
		int percent = (int) (((float) progress / (float) max) * 100); // 中间的进度百分比，先转换成float在进行除法运算，不然都为0
		float textWidth = paint.measureText(percent + "%"); // 测量字体宽度，我们需要根据字体的宽度设置在圆环中间

		if (textIsDisplayable && percent != 0 && style == STROKE)
		{
			canvas.drawText(percent + "%", centerX - textWidth / 2, centerX + textSize / 2, paint); // 画出进度百分比
		}

		/**
		 * 画圆弧 ，画圆环的进度
		 */

		// 设置进度是实心还是空心
		paint.setStrokeWidth(roundWidth); // 设置圆环的宽度
		paint.setColor(roundProgressColor); // 设置进度的颜色
		RectF oval = new RectF(centerX - radius, centerX - radius, centerX + radius, centerX + radius); // 用于定义的圆弧的形状和大小的界限
		switch (style)
		{
		case STROKE:
		{
			paint.setStyle(Paint.Style.STROKE);
			canvas.drawArc(oval, 0, 360 * progress / max, false, paint); // 根据进度画圆弧
			break;
		}
		case FILL:
		{
			paint.setStyle(Paint.Style.FILL_AND_STROKE);
			if (progress != 0)
				canvas.drawArc(oval, 0, 360 * progress / max, true, paint); // 根据进度画圆弧
			break;
		}
		}

	}

	public synchronized int getMax()
	{
		return max;
	}

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

	/**
	 * 获取进度.需要同步
	 * 
	 * @return
	 */
	public synchronized int getProgress()
	{
		return progress;
	}

	/**
	 * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步 刷新界面调用postInvalidate()能在非UI线程刷新
	 * 
	 * @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;
	}

}