本文代码是经过简书另一个哥们控件修改而来（只改了小部分），链接
效果如下
TIM图片20171129174213.png
相对之前别人的代码修改了两点:
1、增加了百分比背景
2、优化了百分比展示超出界面问题
因为是为了特定需求而做的，所以都写的比较死，但注释够详细，有需要的直接拿去修改相应代码就行
上代码：
先定义style：
<declare-styleable name="ProgressWithNum">
<attr name="textSize" format="dimension"/>
<attr name="textColor" format="color"/>
<attr name="textVisible" format="enum">
<enum name="visible" value="0"/>
<enum name="inVisible" value="1"/>
</attr>
<attr name="lineHeight" format="dimension"/>
<attr name="lineStartColor" format="color"/>
<attr name="lineEndColor" format="color"/>
<!--另一个背景进度条渐变结束颜色-->
<attr name="bgLineColor" format="color"/>
</declare-styleable>
接着控件代码：
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Shader;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ProgressBar;
import com.ashokvarma.bottomnavigation.utils.Utils;
import com.tianwen.blindlibrary.R;
/**
* Created by pkxutao on 2017/11/9.
*/
public class ProgressWithNum extends ProgressBar {
//各种控件属性的默认值
//字体大小
private static final int DEFAULT_TEXT_SIZE = 15;
//字体颜色
private static final int DEFAULT_TEXT_COLOR = 0XFFFC00D1;
//进度条宽度
private static final int DEFAULT_LINE_HEIGHT = 10;
//进度条渐变前颜色
private static final int DEFAULT_LINE_START_COLOR = 0XFF95dee1;
//进度条渐变后的颜色
private static final int DEFAULT_LINE_END_COLOR = 0XFF1AA0E5;
//背景进度条颜色
private static final int DEFAULT_BG_LINE_COLOR = 0xFFd3d6da;
//字体是否显示
protected static final int DEFAULT_TEXT_VISIBLE = 0;
//默认值的赋值
protected int textSize = DEFAULT_TEXT_SIZE;
protected int textColor = DEFAULT_TEXT_COLOR;
protected int lineHeight = DEFAULT_LINE_HEIGHT;
protected int lineStartColor = DEFAULT_LINE_START_COLOR;
protected int lineEndColor = DEFAULT_LINE_END_COLOR;
protected int bgLineColor = DEFAULT_BG_LINE_COLOR;
protected int textVisible = DEFAULT_TEXT_VISIBLE;
protected boolean mTextVisible = true;
private Paint mPaint = new Paint();
private int progressBarWidth = 0;
private Context mContext;
//构造方法
public ProgressWithNum(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ProgressWithNum(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContext = context;
setHorizontalScrollBarEnabled(true);
//设置进度条自定义的属性
obtainStyledAttributes(attrs);
mPaint.setTextSize(textSize);
mPaint.setColor(textColor);
}
private void obtainStyledAttributes(AttributeSet attrs) {
//找到资源styleable文件
final TypedArray attributes = getContext().obtainStyledAttributes(attrs, R.styleable.ProgressWithNum);
//各种属性的赋值
textSize = (int) attributes.getDimension(R.styleable.ProgressWithNum_textSize, DEFAULT_TEXT_SIZE);
textColor = attributes.getColor(R.styleable.ProgressWithNum_textColor, DEFAULT_TEXT_COLOR);
// textVisible = attributes.getInt(R.styleable.ProgressWithNum_textVisiable, DEFAULT_TEXT_VISIBLE);
if (textVisible == 1) {
mTextVisible = false;
}
lineHeight = (int) attributes.getDimension(R.styleable.ProgressWithNum_lineHeight, DEFAULT_LINE_HEIGHT);
lineStartColor = attributes.getColor(R.styleable.ProgressWithNum_lineStartColor, DEFAULT_LINE_START_COLOR);
lineEndColor = attributes.getColor(R.styleable.ProgressWithNum_lineEndColor, DEFAULT_LINE_END_COLOR);
bgLineColor = attributes.getColor(R.styleable.ProgressWithNum_bgLineColor, DEFAULT_BG_LINE_COLOR);
attributes.recycle();
}
@Override
protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthModule = MeasureSpec.getMode(widthMeasureSpec);
int heightModule = MeasureSpec.getMode(heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
if (widthModule != MeasureSpec.EXACTLY) {
width = width + getPaddingLeft() + getPaddingBottom();
}
if (heightModule != MeasureSpec.EXACTLY) {
float textHeight = mPaint.ascent() + mPaint.descent();
int result = getPaddingBottom() + getPaddingTop() + (int) Math.max(lineHeight, textHeight);
if (heightModule == MeasureSpec.AT_MOST) {
height = Math.min(height, result);
}
}
progressBarWidth = width - getPaddingLeft() - getPaddingRight();
//把修改后的宽高上传
setMeasuredDimension(width, height);
}
@Override
protected synchronized void onDraw(Canvas canvas) {
canvas.save();
canvas.translate(getPaddingLeft(), getHeight() / 2);
float percent = getProgress() * 1.0f / getMax();
String percentText = (int)(percent * 100) + "%";
float textWidth = mPaint.measureText(percentText);
float textHeight = (mPaint.descent() + mPaint.ascent()) / 2;
float progressLeftWith = percent * progressBarWidth ;
boolean rightShow = true;
if (progressLeftWith + textWidth / 2 >= progressBarWidth) {
progressLeftWith = progressBarWidth - textWidth;
rightShow = false;
}
//绘画渐变进度条
float endX = progressLeftWith;
if (endX > 0) {
int[] mColors = {lineStartColor, lineEndColor};
//渐变颜色
Shader oShader = mPaint.getShader();
LinearGradient shader = new LinearGradient(0, 0, endX, 0, mColors, null,
Shader.TileMode.CLAMP);
mPaint.setShader(shader);
//渐变结束
//线的圆角
mPaint.setStrokeCap(Paint.Cap.ROUND);
//线的高度
mPaint.setStrokeWidth(lineHeight);
//绘画线
canvas.drawLine(0, 0, endX, 0, mPaint);
mPaint.setShader(oShader);
}
//绘画背景进度条
if (rightShow) {
float start = progressLeftWith + textWidth;
mPaint.setColor(bgLineColor);
mPaint.setStrokeWidth(lineHeight);
canvas.drawLine(start, 0, progressBarWidth, 0, mPaint);
}
if (progressLeftWith+textWidth+Utils.dp2px(mContext, 8) > progressBarWidth && mTextVisible){
//字体宽度超出progressbar整体宽度，就直接画在最后，否则会不显示字体
//画百分比背景
Drawable drawable = mContext.getResources().getDrawable(R.drawable.shape_progress_text_bg_blue_round_stroke);
drawable.setBounds(progressBarWidth-(int)(textWidth+Utils.dp2px(mContext, 8)), (int)textHeight- Utils.dp2px(mContext, 3),
progressBarWidth,
-(int)textHeight+Utils.dp2px(mContext, 3));
drawable.draw(canvas);
//绘画显示百分比
mPaint.setColor(textColor);
mPaint.setAntiAlias(true);
canvas.drawText(percentText, progressBarWidth-textWidth-Utils.dp2px(mContext, 4), -textHeight, mPaint);
}else if(mTextVisible){
//画百分比背景
Drawable drawable = mContext.getResources().getDrawable(R.drawable.shape_progress_text_bg_blue_round_stroke);
drawable.setBounds((int)progressLeftWith, (int)textHeight- Utils.dp2px(mContext, 3),
(int)(progressLeftWith+textWidth)+Utils.dp2px(mContext, 8),
-(int)textHeight+Utils.dp2px(mContext, 3));
drawable.draw(canvas);
//绘画显示百分比
mPaint.setColor(textColor);
mPaint.setAntiAlias(true);
canvas.drawText(percentText, progressLeftWith+Utils.dp2px(mContext, 4), -textHeight, mPaint);
}
canvas.restore();
}
}
布局代码:
<com.tianwen.blindlibrary.views.ProgressWithNum"
android:layout_width="0dp"
android:layout_height="22dp"
android:layout_marginEnd="15dp"
android:layout_marginStart="15dp"
android:layout_marginTop="8dp"
app:lineStartColor="#57c6fe"
app:lineEndColor="#508eef"
app:textSize="10sp"
app:textColor="#508eef"
android:progress="50"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView20"
app:layout_goneMarginRight="15dp"
app:progress_reached_bar_height="2dp"
app:progress_unreached_bar_height="2dp" />
使用方法和普通progressbar一样
