Android自定义圆形进度条

来源：互联网发布：7层网络结构图编辑：程序博客网时间：2024/05/16 10:10

首先看一下效果：

这里写图片描述

自定义的View:

import com.example.circlepregress.R;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.util.Log;import android.view.View;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;    /**     * 构造方法     */    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.RED);        roundProgressColor = mTypedArray.getColor(                R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);        textColor = mTypedArray.getColor(                R.styleable.RoundProgressBar_textColor, Color.GREEN);        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 centre = getWidth() / 2; // 获取圆心的x坐标        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(centre, centre, 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 + "%", centre - textWidth / 2, centre                    + 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(centre - radius, centre - radius, centre                + radius, centre + 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, 0, 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, 0, 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();        }    }    /******************** 下边是属性的get、set方法 ***************/    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;    }}

所需要的资源文件：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>

布局文件如下：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:android_custom="http://schemas.android.com/apk/res/com.example.circlepregress"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <com.example.roundprogressbar.RoundProgressBar        android:id="@+id/roundProgressBar2"        android:layout_width="80dip"        android:layout_height="80dip"        android:layout_alignLeft="@+id/roundProgressBar1"        android:layout_alignParentBottom="true"        android:layout_marginBottom="78dp"        android_custom:roundColor="#D1D1D1"        android_custom:roundProgressColor="@android:color/black"        android_custom:roundWidth="10dip"        android_custom:textColor="#9A32CD"        android_custom:textSize="18sp" />    <com.example.roundprogressbar.RoundProgressBar        android:id="@+id/roundProgressBar4"        android_custom:style="FILL"        android:layout_width="80dip"        android:layout_height="80dip"        android:layout_alignParentRight="true"        android:layout_alignTop="@+id/roundProgressBar1"        android:layout_marginRight="32dp"        android_custom:roundProgressColor="#C2C2C2"        android_custom:roundWidth="1dip" />    <com.example.roundprogressbar.RoundProgressBar        android:id="@+id/roundProgressBar3"        android:layout_width="80dip"        android:layout_height="80dip"        android:layout_alignLeft="@+id/roundProgressBar4"        android:layout_alignTop="@+id/roundProgressBar2"        android_custom:roundColor="#C6E2FF"        android_custom:roundProgressColor="#CD3333"        android_custom:roundWidth="10dip"        android_custom:textIsDisplayable="false" />    <com.example.roundprogressbar.RoundProgressBar        android:id="@+id/roundProgressBar5"        android:layout_width="50dip"        android:layout_height="50dip"        android:layout_below="@+id/roundProgressBar1"        android:layout_marginLeft="22dp"        android:layout_toRightOf="@+id/roundProgressBar1" />    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentRight="true"        android:layout_alignParentTop="true"        android:text="Button" />    <com.example.roundprogressbar.RoundProgressBar        android:id="@+id/roundProgressBar1"        android:layout_width="80dip"        android:layout_height="80dip"        android:layout_alignParentLeft="true"        android:layout_below="@+id/button1"        android:layout_marginLeft="16dp"        android:layout_marginTop="40dp" /></RelativeLayout>

其中我们使用了这一句：

xmlns:android_custom="http://schemas.android.com/apk/res/com.example.circlepregress"

xmlns:android_custom是我们自己定义的标签，res/com.example.circlepregress其中res/后边的就是我们自定义View所在的目录

MainActivity.java如下：

import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import com.example.circlepregress.R;public class MainActivity extends Activity {    private RoundProgressBar mRoundProgressBar1, mRoundProgressBar2 ,mRoundProgressBar3, mRoundProgressBar4, mRoundProgressBar5;    private int progress = 0;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_cricle_progress);        mRoundProgressBar1 = (RoundProgressBar) findViewById(R.id.roundProgressBar1);        mRoundProgressBar2 = (RoundProgressBar) findViewById(R.id.roundProgressBar2);        mRoundProgressBar3 = (RoundProgressBar) findViewById(R.id.roundProgressBar3);        mRoundProgressBar4 = (RoundProgressBar) findViewById(R.id.roundProgressBar4);        mRoundProgressBar5 = (RoundProgressBar) findViewById(R.id.roundProgressBar5);        ((Button)findViewById(R.id.button1)).setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                new Thread(new Runnable() {                    @Override                    public void run() {                        while(progress <= 100){                            progress += 3;                            System.out.println(progress);                            mRoundProgressBar1.setProgress(progress);                            mRoundProgressBar2.setProgress(progress);                            mRoundProgressBar3.setProgress(progress);                            mRoundProgressBar4.setProgress(progress);                            mRoundProgressBar5.setProgress(progress);                            try {                                Thread.sleep(100);                            } catch (InterruptedException e) {                                e.printStackTrace();                            }                        }                    }                }).start();            }        });    }}

项目免费下载地址：http://download.csdn.net/detail/u010870518/8620359

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