本文实例讲述了android自定义圆形进度条，分享给大家供大家参考。具体如下：
运行效果截图如下：
具体代码如下：
自定义的view:
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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
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<?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：
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<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：
复制代码 代码如下:
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：
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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： 《android自定义圆形进度条》
希望本文所述对大家学习android软件编程有所帮助。
