Android带圆形数字进度的自定义进度条示例

开发

设计搞了一个带圆形进度的进度条，在GitHub上逛了一圈，发现没有，自己撸吧。

先看界面效果：

主要思路是写一个继承ProgressBar的自定义View，不废话，直接上代码：

package com.fun.progressbarwithnumber;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.widget.ProgressBar;

public class HorizontalProgressBarWithNumber extends ProgressBar {

private static final int DEFAULT_TEXT_SIZE = 10;
 private static final int DEFAULT_TEXT_COLOR = 0XFFFC00D1;
 private static final int DEFAULT_COLOR_UNREACHED_COLOR = 0xFFd3d6da;
 private static final int DEFAULT_HEIGHT_REACHED_PROGRESS_BAR = 2;
 private static final int DEFAULT_HEIGHT_UNREACHED_PROGRESS_BAR = 2;
 private static final int DEFAULT_CIRCLE_COLOR = 0XFF3F51B5;

protected Paint mPaint = new Paint();
 // 字体颜色
 protected int mTextColor = DEFAULT_TEXT_COLOR;
 // 字体大小
 protected int mTextSize = sp2px(DEFAULT_TEXT_SIZE);
 // 覆盖进度高度
 protected int mReachedProgressBarHeight = dp2px(DEFAULT_HEIGHT_REACHED_PROGRESS_BAR);
 // 覆盖进度颜色
 protected int mReachedBarColor = DEFAULT_TEXT_COLOR;
 // 未覆盖进度高度
 protected int mUnReachedProgressBarHeight = dp2px(DEFAULT_HEIGHT_UNREACHED_PROGRESS_BAR);
 // 未覆盖进度颜色
 protected int mUnReachedBarColor = DEFAULT_COLOR_UNREACHED_COLOR;
 // 圆的颜色
 protected int mCircleColor = DEFAULT_CIRCLE_COLOR;

protected int mRealWidth;

protected boolean mIfDrawText = true;
 protected boolean mIfDrawCircle = true;

protected static final int VISIBLE = 0;

public HorizontalProgressBarWithNumber(Context context, AttributeSet attrs) {
   this(context, attrs, 0);
 }

public HorizontalProgressBarWithNumber(Context context, AttributeSet attrs, int defStyle) {
   super(context, attrs, defStyle);
   obtainStyledAttributes(attrs);
   mPaint.setTextSize(mTextSize);
   mPaint.setColor(mTextColor);
   mPaint.setAntiAlias(true);
 }

private void obtainStyledAttributes(AttributeSet attrs) {
   // 获取自定义属性
   final TypedArray attributes = getContext().obtainStyledAttributes(attrs, R.styleable.HorizontalProgressBarWithNumber);
   mTextColor = attributes.getColor(R.styleable.HorizontalProgressBarWithNumber_progress_text_color, DEFAULT_TEXT_COLOR);
   mTextSize = (int) attributes.getDimension(R.styleable.HorizontalProgressBarWithNumber_progress_text_size, mTextSize);
   mCircleColor = attributes.getColor(R.styleable.HorizontalProgressBarWithNumber_progress_circle_color, DEFAULT_CIRCLE_COLOR);
   mReachedBarColor = attributes.getColor(R.styleable.HorizontalProgressBarWithNumber_progress_reached_color, mTextColor);
   mUnReachedBarColor = attributes.getColor(R.styleable.HorizontalProgressBarWithNumber_progress_unreached_color, DEFAULT_COLOR_UNREACHED_COLOR);
   mReachedProgressBarHeight = (int) attributes.getDimension(R.styleable.HorizontalProgressBarWithNumber_progress_reached_bar_height, mReachedProgressBarHeight);
   mUnReachedProgressBarHeight = (int) attributes.getDimension(R.styleable.HorizontalProgressBarWithNumber_progress_unreached_bar_height, mUnReachedProgressBarHeight);
   int textVisible = attributes.getInt(R.styleable.HorizontalProgressBarWithNumber_progress_text_visibility, VISIBLE);
   if (textVisible != VISIBLE) {
     mIfDrawText = false;
   }
   attributes.recycle();
   int left = (int) (mReachedProgressBarHeight * 0.8), right = (int) (mReachedProgressBarHeight * 0.8);
   int top = (int) (mReachedProgressBarHeight * 0.3 + dp2px(1)), bottom = (int) (mReachedProgressBarHeight * 0.3 + dp2px(1));
   setPadding(left, top, right, bottom);
 }

@Override
 protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
   int width = MeasureSpec.getSize(widthMeasureSpec);
   int height = measureHeight(heightMeasureSpec);
   setMeasuredDimension(width, height);
   mRealWidth = getMeasuredWidth() - getPaddingRight() - getPaddingLeft();
 }

private int measureHeight(int measureSpec) {
   int result;
   int specMode = MeasureSpec.getMode(measureSpec);
   int specSize = MeasureSpec.getSize(measureSpec);
   if (specMode == MeasureSpec.EXACTLY) {
     result = specSize;
   } else {
     float textHeight = (mPaint.descent() - mPaint.ascent());
     result = (int) (getPaddingTop() + getPaddingBottom() + Math.max(
         Math.max(mReachedProgressBarHeight, mUnReachedProgressBarHeight), Math.abs(textHeight)));
     if (specMode == MeasureSpec.AT_MOST) {
       result = Math.min(result, specSize);
     }
   }
   return result;
 }

@Override
 protected synchronized void onDraw(Canvas canvas) {
   canvas.save();
   canvas.translate(getPaddingLeft(), getHeight() / 2);

boolean noNeedBg = false;
   float radio = getProgress() * 1.0f / getMax();
   float progressPosX = (int) (mRealWidth * radio);
   String text = getProgress() + "％";

float textWidth = mPaint.measureText(text);
   float textHeight = (mPaint.descent() + mPaint.ascent()) / 2;

float radius = (mReachedProgressBarHeight + getPaddingBottom() + getPaddingTop()) / 2;

// 覆盖的进度
   float endX = progressPosX;
   if (endX > -1) {
     mPaint.setColor(mReachedBarColor);
     RectF rectF = new RectF(0, 0 - getPaddingTop() - getPaddingBottom(),
         endX, mReachedProgressBarHeight - getPaddingBottom());
     canvas.drawRoundRect(rectF, 25, 25, mPaint);
   }

// 未覆盖的进度
   if (!noNeedBg) {
     float start = progressPosX;
     mPaint.setColor(mUnReachedBarColor);
     RectF rectF = new RectF(start, 0 - getPaddingTop() - getPaddingBottom(),
         mRealWidth + getPaddingRight() - radius, mReachedProgressBarHeight - getPaddingBottom());
     canvas.drawRoundRect(rectF, 25, 25, mPaint);
   }

// 圆
   if (mIfDrawCircle) {
     mPaint.setColor(mCircleColor);
     canvas.drawCircle(progressPosX, 0, radius, mPaint);
   }

// 文本
   if (mIfDrawText) {
     mPaint.setColor(mTextColor);
     canvas.drawText(text, progressPosX - textWidth / 2, -textHeight, mPaint);
   }

canvas.restore();

}

/**
  * dp 2 px
  */
 protected int dp2px(int dpVal) {
   return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dpVal, getResources().getDisplayMetrics());
 }

/**
  * sp 2 px
  */
 protected int sp2px(int spVal) {
   return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, spVal, getResources().getDisplayMetrics());
 }

}

使用

在布局文件中加入：

<com.fun.progressbarwithnumber.HorizontalProgressBarWithNumber
   android:id="@+id/hpbwn"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_margin="10dp"
   fun:progress_circle_color="#ff000000"
   fun:progress_reached_bar_height="20dp"
   fun:progress_reached_color="#FFFF4081"
   fun:progress_text_color="#ffffffff"
   fun:progress_text_size="14sp"
   fun:progress_unreached_bar_height="20dp"
   fun:progress_unreached_color="#ffBCB4E8" />

• progress_reached_bar_height：当前进度的高度

• progress_unreached_bar_height：剩余进度的高度

• progress_text_size：圆圈内文字的大小

注意：

当前进度和剩余进度的高度要一致，圆圈大小和圆圈内文字的大小要配合Java代码调整。

项目源码：ProgressBarWithNumber_jb51.rar

来源：http://www.jianshu.com/p/777e67db5b53