Android实现环形进度条代码
作者：掌握当下
这篇文章主要为大家详细介绍了Android实现环形进度条的代码，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
本文参考借鉴：https://www.jb51.net/article/102983.htm
先上效果图：
自定义控件：AttendanceProgressBar
代码如下：
public class AttendanceProgressBar extends View {
// 画圆环底部的画笔
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 = 80;
//字体颜色
private int mTextColor;
// 字体大小
private float mTextSize;
public AttendanceProgressBar(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.AttendanceProgressBar, 0, 0);
mRadius = typeArray.getDimension(R.styleable.AttendanceProgressBar_radius, 80);
mStrokeWidth = typeArray.getDimension(R.styleable.AttendanceProgressBar_strokeWidth, 10);
mCircleColor = typeArray.getColor(R.styleable.AttendanceProgressBar_circleColor, 0xFFFFFFFF);
mRingColor = typeArray.getColor(R.styleable.AttendanceProgressBar_ringColor, 0xFFFFFFFF);
mTextColor = typeArray.getColor(R.styleable.AttendanceProgressBar_textColor, 0xFF000000);
mTextSize = typeArray.getDimension(R.styleable.AttendanceProgressBar_textSize, 80);
mRingRadius = mRadius + mStrokeWidth / 2;
}
private void initVariable() {
mCirclePaint = new Paint();
mCirclePaint.setAntiAlias(true);
mCirclePaint.setColor(mCircleColor);
// mCirclePaint.setStyle(Paint.Style.FILL);
mCirclePaint.setStyle(Paint.Style.STROKE);
mCirclePaint.setStrokeWidth(mStrokeWidth);
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.setColor(mTextColor);
// mTextPaint.setARGB(255, 255, 255, 255);
// mTextPaint.setTextSize(mRadius / 2);
mTextPaint.setTextSize(mTextSize);
Paint.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);
canvas.drawCircle(mXCenter, mYCenter, mRingRadius, mCirclePaint);
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 + "%";
String txt = "16/18";
mTxtWidth = mTextPaint.measureText(txt, 0, txt.length());
// canvas.drawText(txt, mXCenter - mTxtWidth / 2, mYCenter + mTxtHeight / 4, mTextPaint);
canvas.drawText(txt, mXCenter - mTxtWidth / 2, mYCenter + mTxtHeight / 4 - dipToPx(10), mTextPaint);
txt = "出勤人数";
mTxtWidth = mTextPaint.measureText(txt, 0, txt.length());
canvas.drawText(txt, mXCenter - mTxtWidth / 2, mYCenter + mTxtHeight / 4 + dipToPx(10), mTextPaint);
}
public void setProgress(int progress) {
mProgress = progress;
postInvalidate();
}
private int dipToPx(int dip) {
float scale = getContext().getResources().getDisplayMetrics().density;
return (int) (dip * scale + 0.5f * (dip >= 0 ? 1 : -1));
}
}
因为是自定义控件，所以在attr.xml文件定义了一些控件属性，以便在xml文件中设置这些属性
代码如下：
<?xml version="1.0" encoding="utf-8"?> <resources> <declare-styleable name="AttendanceProgressBar"> <attr name="radius" format="dimension"/> <attr name="strokeWidth" format="dimension"/> <attr name="circleColor" format="color"/> <attr name="ringColor" format="color"/> <attr name="textColor" format="color"/> <attr name="textSize" format="dimension"/> </declare-styleable> </resources>
最后，在xml文件中，可以这样使用
<com.ztd.lieyi.widget.AttendanceProgressBar android:layout_gravity="center" android:layout_width="100dp" android:layout_height="100dp" app:radius="45dp" app:strokeWidth="5dp" app:textSize="@dimen/text_16" app:textColor="@color/color_333333" app:circleColor="@color/color_d5ebfd" app:ringColor="@color/color_2c9df7"/>
这只是初步处理，使用时可以根据需求酌情处理。
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。