自定义圆环progressbar

RoundProgressBar.java

/**
 * RoundProgressBar.java [v1.0.0]
 * classes: com.example.audiorecordingtest.RoundProgressBar
 * Amanda Create at 2014年10月10日 下午4:16:45
 * Copyright 阳光健康信息技术有限公司
 */
package com.example.audiorecordingtest.view;
/**
 * com.example.audiorecordingtest.RoundProgressBar
 * @author Amanda
 * create at 2014年10月10日 下午4:16:45
 */
import com.example.audiorecordingtest.R;
import com.example.audiorecordingtest.R.styleable;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.view.View;
/**
 * 仿iphone带进度的进度条，线程安全的View，可直接在线程中更新进度
 *
 */
public class RoundProgressBar extends View {
    /**
     * 画笔对象的引用
     */
    private Paint paint;
    
    /**
     * 圆环的颜色
     */
    private int roundColor;
    
    /**
     * 圆环进度的颜色
     */
    private int roundProgressColor;
    
    /**
     * 中间进度百分比的字符串的颜色
     */
    private int textColor;
    
    /**
     * 中间进度百分比的字符串的字体
     */
    private float textSize;
    
    /**
     * 圆环的宽度
     */
    private float roundWidth;
    
    /**
     * 最大进度
     */
    private int max;
    
    /**
     * 当前进度
     */
    private int progress;
    /**
     * 是否显示中间的进度
     */
    private boolean textIsDisplayable;
    
    /**
     * 进度的风格，实心或者空心
     */
    private int style;
    
    public static final int STROKE = 0;
    public static final int FILL = 1;
    
    public RoundProgressBar(Context context) {
        this(context, null);
    }
    public RoundProgressBar(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
    
    public RoundProgressBar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        
        paint = new Paint();
        
        TypedArray mTypedArray = context.obtainStyledAttributes(attrs,
                R.styleable.RoundProgressBar);
        
        //获取自定义属性和默认值
        roundColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundColor, Color.rgb(245, 252, 248));
        roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.rgb(62, 187, 102));
        textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.BLACK);
        textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);
        roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);
        max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);
        textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);
        style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 0);
        
        mTypedArray.recycle();
    }
    
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        
        /**
         * 画最外层的大圆环
         */
        int centerX = getWidth()/2;
        int centerY = getHeight()/2;
        int centre = centerX>centerY?centerY:centerX;
        int radius = (int) (centre - roundWidth/2); //圆环的半径
        paint.setColor(roundColor); //设置圆环的颜色
        paint.setStyle(Paint.Style.STROKE); //设置空心
        paint.setStrokeWidth(roundWidth); //设置圆环的宽度
        paint.setAntiAlias(true);  //消除锯齿 
        canvas.drawCircle(centerX, centerY, radius, paint); //画出圆环
        
//        Log.e("log", centre + "");
        
        /**
         * 画进度百分比
         */
        paint.setStrokeWidth(0); 
        paint.setColor(textColor);
        paint.setTextSize(textSize);
        paint.setTypeface(Typeface.DEFAULT_BOLD); //设置字体
        int percent = (int)(((float)progress / (float)max) * 100);  //中间的进度百分比，先转换成float在进行除法运算，不然都为0
        float textWidth = paint.measureText(percent + "%");   //测量字体宽度，我们需要根据字体的宽度设置在圆环中间
        
        if(textIsDisplayable && percent != 0 && style == STROKE){
            canvas.drawText(percent + "%", centerX - textWidth / 2, centerY + textSize/2, paint); //画出进度百分比
        }
        
        
        /**
         * 画圆弧 ，画圆环的进度
         */
        
        //设置进度是实心还是空心
        paint.setStrokeWidth(roundWidth); //设置圆环的宽度
        paint.setColor(roundProgressColor);  //设置进度的颜色
        RectF oval = new RectF(centerX - radius, centerY - radius, centerX
                + radius, centerY + radius);  //用于定义的圆弧的形状和大小的界限
        
        switch (style) {
        case STROKE:{
            paint.setStyle(Paint.Style.STROKE);
            canvas.drawArc(oval, 90, 360 * progress / max, false, paint);  //根据进度画圆弧
            break;
        }
        case FILL:{
            paint.setStyle(Paint.Style.FILL_AND_STROKE);
            if(progress !=0){
                canvas.drawArc(oval, 90, 360 * progress / max, true, paint);  //根据进度画圆弧
            }
            break;
        }
        }
        
    }
    
    
    public synchronized int getMax() {
        return max;
    }
    /**
     * 设置进度的最大值
     * @param max
     */
    public synchronized void setMax(int max) {
        if(max < 0){
            throw new IllegalArgumentException("max not less than 0");
        }
        this.max = max;
    }
    /**
     * 获取进度.需要同步
     * @return
     */
    public synchronized int getProgress() {
        return progress;
    }
    /**
     * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步
     * 刷新界面调用postInvalidate()能在非UI线程刷新
     * @param progress
     */
    public synchronized void setProgress(int progress) {
        if(progress < 0){
            throw new IllegalArgumentException("progress not less than 0");
        }
        if(progress > max){
            progress = max;
        }
        if(progress <= max){
            this.progress = progress;
            postInvalidate();
        }
        
    }
    
    
    public int getCricleColor() {
        return roundColor;
    }
    public void setCricleColor(int cricleColor) {
        this.roundColor = cricleColor;
    }
    public int getCricleProgressColor() {
        return roundProgressColor;
    }
    public void setCricleProgressColor(int cricleProgressColor) {
        this.roundProgressColor = cricleProgressColor;
    }
    public int getTextColor() {
        return textColor;
    }
    public void setTextColor(int textColor) {
        this.textColor = textColor;
    }
    public float getTextSize() {
        return textSize;
    }
    public void setTextSize(float textSize) {
        this.textSize = textSize;
    }
    public float getRoundWidth() {
        return roundWidth;
    }
    public void setRoundWidth(float roundWidth) {
        this.roundWidth = roundWidth;
    }
}

values/attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="RoundProgressBar">    
        <attr name="roundColor" format="color"/>  
        <attr name="roundProgressColor" format="color"/>  
        <attr name="roundWidth" format="dimension"></attr>  
        <attr name="textColor" format="color" />    
        <attr name="textSize" format="dimension" />   
        <attr name="max" format="integer"></attr>   
        <attr name="textIsDisplayable" format="boolean"></attr>  
        <attr name="style">  
            <enum name="STROKE" value="0"></enum>  
            <enum name="FILL" value="1"></enum>  
        </attr>  
    </declare-styleable>  
</resources>

layout/audiorecord.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:android_custom="http://schemas.android.com/apk/res/com.example.audiorecordingtest"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center">
    
    <FrameLayout 
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="2">
        
        <ImageView 
            android:id="@+id/img_microfan"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:src="@drawable/microfan"
            android:scaleType="centerInside"/>
        
        <com.example.audiorecordingtest.view.RoundProgressBar
            android:id="@+id/roundProgressBar"    
            android:layout_width="match_parent"    
            android:layout_height="match_parent"
            android_custom:roundColor="#f6fcf8"
            android_custom:roundProgressColor="#41c36b"
            android_custom:textIsDisplayable="false"    
            android_custom:roundWidth="5dp"/>
    </FrameLayout>
    
    
    <TextView 
        android:id="@+id/txt_microfan"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:gravity="center"
        android:text="正在录音……"
        android:textColor="#3c3c3c"
        android:textSize="30px"/>
    
</LinearLayout>

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