Android按钮式进度条

 package com.example.progress.demo;

 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.Paint.FontMetrics;
 import android.graphics.RectF;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;

 import com.example.firstapp.R;

 @SuppressLint("DrawAllocation")
 public class ProgressButton extends View {
     private FontMetrics fm;
     private int progress = 0;
     private int textColor = Color.WHITE;
     private Paint paint;
     private float textSize = 10;
     private int foreground;
     private int backgroundColor;
     private String text;
     private int max = 100;
     private int corner = 5;// 圆角的弧度
     private OnProgressButtonClickListener buttonClickListener;

     public ProgressButton(Context context, AttributeSet attrs) {
         super(context, attrs);
         init(context, attrs);
     }

     public ProgressButton(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
         init(context, attrs);
     }

     private void init(Context context, AttributeSet attrs) {
         TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.ProgressButton);
         this.backgroundColor = typedArray.getInteger(R.styleable.ProgressButton_background, Color.parseColor("#C6C6C6"));
         this.foreground = typedArray.getInteger(R.styleable.ProgressButton_foreground,  Color.rgb(20,131,214));
         this.textColor = typedArray.getInteger(R.styleable.ProgressButton_textcolor, Color.WHITE);
         this.max = typedArray.getInteger(R.styleable.ProgressButton_max, 100);
         this.progress = typedArray.getInteger(R.styleable.ProgressButton_progress, 0);
         this.text = typedArray.getString(R.styleable.ProgressButton_text);
         this.textSize = typedArray.getDimension(R.styleable.ProgressButton_textSize, 20);
         typedArray.recycle();
     }

     @Override
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
         paint = new Paint();
         paint.setAntiAlias(true);
         paint.setStrokeWidth(5);

         /**
          * 绘制背景
          */
         RectF oval = new RectF(0, 0, getWidth(), getHeight());

         paint.setColor(this.backgroundColor);
         canvas.drawRoundRect(oval, corner, corner, paint);

         /***
          * 绘制进度值
          */

         paint.setColor(foreground);
         if (progress <= corner) {
             oval = new RectF(0, corner - progress, getWidth() * this.progress / this.max, getHeight()
                     - corner + progress);
             canvas.drawRoundRect(oval, progress,progress, paint);
         } else {
             oval = new RectF(0, 0, getWidth() * this.progress / this.max, getHeight());
             canvas.drawRoundRect(oval, corner, corner, paint);
         }

         /***
          * 绘制文本
          */
         if ("".equals(text) || text == null) {
             return;
         }
         paint.setTextSize(this.textSize);
         fm = paint.getFontMetrics();
         paint.setColor(this.textColor);

         float textCenterVerticalBaselineY = getHeight() / 2 - fm.descent + (fm.descent - fm.ascent) / 2;
         canvas.drawText(this.text, (getMeasuredWidth() - paint.measureText(this.text)) / 2, textCenterVerticalBaselineY,
                 paint);

     }

     /**
      * 设置最大值
      *
      * @param max
      */
     public void setMax(int max) {
         this.max = max;
     }

     /**
      * 设置文本提示信息
      *
      * @param text
      */
     public void setText(String text) {
         this.text = text;
     }

     /**
      * 设置进度条的颜色值
      *
      * @param color
      */
     public void setForeground(int color) {
         this.foreground = color;
     }

     /**
      * 设置进度条的背景色
      */
     public void setBackgroundColor(int color) {
         this.backgroundColor = color;
     }

     /***
      * 设置文本的大小
      */
     public void setTextSize(int size) {
         this.textSize = size;
     }

     /**
      * 设置文本的颜色值
      *
      * @param color
      */
     public void setTextColor(int color) {
         this.textColor = color;
     }

     /**
      * 设置进度值
      *
      * @param progress
      */
     public void setProgress(int progress) {
         if(progress>max){
             return;
         }
         this.progress=progress;
         //设置进度之后，要求UI强制进行重绘
         postInvalidate();
     }

     public int getMax(){
         return max;
     }

     public int getProgress(){
         return progress;
     }

     @SuppressLint("ClickableViewAccessibility")
     @Override
     public boolean onTouchEvent(MotionEvent event) {
         switch (event.getAction()) {
         case MotionEvent.ACTION_UP:
             buttonClickListener.onClickListener();
             break;
         default:
             break;
         }
         return true;
     }

     public void setOnProgressButtonClickListener(OnProgressButtonClickListener clickListener){
         buttonClickListener = clickListener;
     }

     public interface OnProgressButtonClickListener{
         public void onClickListener();
     }

<declare-styleable name="ProgressButton">
　　<attr name="background" format="color" />
　　<attr name="foreground" format="color" />
　　<attr name="textcolor" format="color" />
　　<attr name="max" />
　　<attr name="progress" />
　　<attr name="textSize" />
　　<attr name="text" format="string" />
</declare-styleable>

　　

 }