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>

 }