android 自定义带进度值的圆形进度条

这个进度条非常实用，可以有进度的显示，可以自定义圆内部和边缘的颜色等，话不都说，先看效果再上车，

直接上代码：

调用实例

package android.example.com.roundprogressbar;

import android.app.Activity;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.util.Log;
import android.widget.TextView;

public class MainActivity extends Activity {

    private RoundProgressBar mProgressBar;
    private TextView mTextview;

    private final long DURATION_TIME = 6*1000;
    private final int TOTAL_PROGRESS = 100;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mProgressBar = (RoundProgressBar) findViewById(R.id.id_progress_bar);
        mTextview = (TextView) findViewById(R.id.textview);
        mTimer.start();
    }

    /**
     * 每隔一秒钟执行一次，总共5分钟
     */
    private CountDownTimer mTimer = new CountDownTimer(DURATION_TIME, 100) {

        @Override
        public void onTick(long millisUntilFinished) {
            // 每隔一秒调用一次，剩余多少时间
            int progress = (int)(TOTAL_PROGRESS*(DURATION_TIME - millisUntilFinished) / DURATION_TIME);
            mProgressBar.setProgress(progress);
            mTextview.setText(progress + "");
        }

        @Override
        public void onFinish() {
            // 执行完毕
            mProgressBar.setProgress(TOTAL_PROGRESS);
            mTextview.setText(TOTAL_PROGRESS + "");
        }
    };

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mTimer.cancel();
        mTimer = null;
    }
}

下面是自定义圆形进度条代码：

package android.example.com.roundprogressbar;

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.Typeface;
import android.util.AttributeSet;
import android.view.View;

/**
 * 带进度的进度条，线程安全的View，可直接在线程中更新进度
 *
 * @author Alex
 * @date 2016-05-18
 *
 */
@SuppressLint("DrawAllocation")
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;

	/**
	 * 进度圆环的起始角度
	 */
	private int startAngle;

	/**
	 * 进度圆环的扫描角度
	 */
	private int sweepAngle;

	/**
	 * 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_txtColor, Color.GREEN);
		textSize = mTypedArray.getDimension(
				R.styleable.RoundProgressBar_txtSize, 15);
		roundWidth = mTypedArray.getDimension(
				R.styleable.RoundProgressBar_roundWidth, 5);
		max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);
		startAngle = mTypedArray.getInteger(R.styleable.RoundProgressBar_startAngle, 0);
		sweepAngle = mTypedArray.getInteger(R.styleable.RoundProgressBar_sweepAngle, 360);
		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);

		/**
		 * 画最外层的大圆环
		 */
		int centre = getWidth() / 2; // 获取圆心的x坐标
		int radius = (int) (centre - roundWidth / 2); // 圆环的半径
		paint.setStrokeCap(Paint.Cap.ROUND);
		paint.setColor(roundColor); // 设置圆环的颜色
		paint.setStyle(Paint.Style.FILL); // 设置空心
//		paint.setStrokeWidth(roundWidth); // 设置圆环的宽度
		paint.setAntiAlias(true); // 消除锯齿
		canvas.drawCircle(centre, centre, radius, paint); // 画出圆环

		/**
		 * 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 + "%", centre - textWidth / 2, centre
					+ 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(roundColor); // 设置进度的颜色
		RectF oval = new RectF(centre - radius, centre - radius, centre
				+ radius, centre + 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, startAngle, sweepAngle, false, paint); // 根据进度画圆弧
				paint.setColor(roundProgressColor); // 设置进度的颜色
				paint.setStyle(Paint.Style.STROKE);
				canvas.drawArc(oval, startAngle, sweepAngle * 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;
	}

}

还有自定义属性，res/values/attrs.xml,

代码就贴完了，下面提供下项目例子地址，

点击打开链接

http://download.csdn.net/detail/msn465780/9793849