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;    }}

<?xml version="1.0" encoding="utf-8"?>

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();}@Overrideprotected 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0float 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,

<?xml version="1.0" encoding="utf-8"?>

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

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