package com.qiao.circleprogress_forexample;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;/** * 主页面 * @author 有点凉了 * */public class MainActivity extends Activity {	private RoundProgressBar progressBar1;	private  int progress = 0;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		progressBar1 = (RoundProgressBar) findViewById(R.id.progressBar1);		new Thread(new Runnable() {						@Override			public void run() {				while (progress<=59) {					progress+=1;					progressBar1.setProgress(progress);					try {						Thread.sleep(100);					} catch (InterruptedException e) {						// TODO Auto-generated catch block						e.printStackTrace();					}				}			}		}).start();	}	@Override	public boolean onCreateOptionsMenu(Menu menu) {		// Inflate the menu; this adds items to the action bar if it is present.		getMenuInflater().inflate(R.menu.main, menu);		return true;	}	@Override	public boolean onOptionsItemSelected(MenuItem item) {		// Handle action bar item clicks here. The action bar will		// automatically handle clicks on the Home/Up button, so long		// as you specify a parent activity in AndroidManifest.xml.		int id = item.getItemId();		if (id == R.id.action_settings) {			return true;		}		return super.onOptionsItemSelected(item);	}}

package com.qiao.circleprogress_forexample;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;/** * 仿iphone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 有点凉了 * */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.WHITE);		roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.BLUE);		textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.BLACK);		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, 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.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(centre, centre, radius, paint); //画出圆环				Log.e("log", centre + "");				/**		 * 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(roundProgressColor);  //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, 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;	}}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <com.qiao.circleprogress_forexample.RoundProgressBar        android:id="@+id/progressBar1"        android:layout_width="100dip"        android:layout_height="100dip"        /></LinearLayout>

<?xml version="1.0" encoding="UTF-8"?><resources>    <declare-styleable name="RoundProgressBar">          <attr name="roundColor" format="color"/>        <attr name="roundProgressColor" format="color"/>        <attr name="roundWidth" format="dimension"></attr>        <attr name="textColor" format="color" />          <attr name="textSize" format="dimension" />         <attr name="max" format="integer"></attr>         <attr name="textIsDisplayable" format="boolean"></attr>        <attr name="style">            <enum name="STROKE" value="http://www.mamicode.com/0"></enum>            <enum name="FILL" value="http://www.mamicode.com/1"></enum>        </attr>    </declare-styleable> </resources>