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，
文章图片
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,
【android 自定义带进度值的圆形进度条】
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
