Android自定义漂亮的圆形进度条

这几天对Android中实现画圆弧及圆弧效果中所实现的效果进行了修改，改为进度圆心进度条，效果如图所示

TasksCompletedView.java 代码如下

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Paint.FontMetrics;
import android.util.AttributeSet;
import android.view.View;
import com.snailws.taskscompleted.R;
/**
* @author naiyu(http://snailws.com)
* @version 1.0
*/
public class TasksCompletedView extends View {
// 画实心圆的画笔
private Paint mCirclePaint;
// 画圆环的画笔
private Paint mRingPaint;
// 画字体的画笔
private Paint mTextPaint;
// 圆形颜色
private int mCircleColor;
// 圆环颜色
private int mRingColor;
// 半径
private float mRadius;
// 圆环半径
private float mRingRadius;
// 圆环宽度
private float mStrokeWidth;
// 圆心x坐标
private int mXCenter;
// 圆心y坐标
private int mYCenter;
// 字的长度
private float mTxtWidth;
// 字的高度
private float mTxtHeight;
// 总进度
private int mTotalProgress = 100;
// 当前进度
private int mProgress;
public TasksCompletedView(Context context, AttributeSet attrs) {
super(context, attrs);
// 获取自定义的属性
initAttrs(context, attrs);
initVariable();
}
private void initAttrs(Context context, AttributeSet attrs) {
TypedArray typeArray = context.getTheme().obtainStyledAttributes(attrs,
R.styleable.TasksCompletedView, 0, 0);
mRadius = typeArray.getDimension(R.styleable.TasksCompletedView_radius, 80);
mStrokeWidth = typeArray.getDimension(R.styleable.TasksCompletedView_strokeWidth, 10);
mCircleColor = typeArray.getColor(R.styleable.TasksCompletedView_circleColor, 0xFFFFFFFF);
mRingColor = typeArray.getColor(R.styleable.TasksCompletedView_ringColor, 0xFFFFFFFF);
mRingRadius = mRadius + mStrokeWidth / 2;
}
private void initVariable() {
mCirclePaint = new Paint();
mCirclePaint.setAntiAlias(true);
mCirclePaint.setColor(mCircleColor);
mCirclePaint.setStyle(Paint.Style.FILL);
mRingPaint = new Paint();
mRingPaint.setAntiAlias(true);
mRingPaint.setColor(mRingColor);
mRingPaint.setStyle(Paint.Style.STROKE);
mRingPaint.setStrokeWidth(mStrokeWidth);
mTextPaint = new Paint();
mTextPaint.setAntiAlias(true);
mTextPaint.setStyle(Paint.Style.FILL);
mTextPaint.setARGB(255, 255, 255, 255);
mTextPaint.setTextSize(mRadius / 2);
FontMetrics fm = mTextPaint.getFontMetrics();
mTxtHeight = (int) Math.ceil(fm.descent - fm.ascent);
}
@Override
protected void onDraw(Canvas canvas) {
mXCenter = getWidth() / 2;
mYCenter = getHeight() / 2;
canvas.drawCircle(mXCenter, mYCenter, mRadius, mCirclePaint);
if (mProgress > 0 ) {
RectF oval = new RectF();
oval.left = (mXCenter - mRingRadius);
oval.top = (mYCenter - mRingRadius);
oval.right = mRingRadius * 2 + (mXCenter - mRingRadius);
oval.bottom = mRingRadius * 2 + (mYCenter - mRingRadius);
canvas.drawArc(oval, -90, ((float)mProgress / mTotalProgress) * 360, false, mRingPaint); //
//            canvas.drawCircle(mXCenter, mYCenter, mRadius + mStrokeWidth / 2, mRingPaint);
String txt = mProgress + "%";
mTxtWidth = mTextPaint.measureText(txt, 0, txt.length());
canvas.drawText(txt, mXCenter - mTxtWidth / 2, mYCenter + mTxtHeight / 4, mTextPaint);
}
}
public void setProgress(int progress) {
mProgress = progress;
//        invalidate();
postInvalidate();
}
}

attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="TasksCompletedView">
<attr name="radius" format="dimension"/>
<attr name="strokeWidth" format="dimension"/>
<attr name="circleColor" format="color"/>
<attr name="ringColor" format="color"/>
</declare-styleable>
</resources>

源码下载：http://xiazai.jb51.net/201701/yuanma/AndroidCompleted(jb51.net).rar

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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