这篇文章主要介绍“自定义视图view怎么实现环形进度条”，在日常操作中，相信很多人在自定义视图view怎么实现环形进度条问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”自定义视图view怎么实现环形进度条”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
一、普通效果。
package tester.ermu.com.pingamedemo;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 { private Paint paint; private int roundColor; private int roundProgressColor; private int textColor; private float textSize; private float roundWidth; private int max; private int progress; private boolean textIsDisplayable; 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.RED);//圆环的颜色 roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);//圆环进度的颜色 textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);//字体颜色 textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);//字体大小 roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);//圆环的宽度 max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);//进度条最大值，一般都为1001 textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);//是否显示中间的进度 style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 1);//进度的风格，实心或者空心 mTypedArray.recycle(); } 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(); } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); int centre = getWidth()/2; //获取圆心的x坐标 Log.i("Text","centre ------1111"+centre); int radius = (int) (centre - roundWidth*2); //圆环的半径 Log.i("Text","radius ------2222"+radius); 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 + ""); 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 } //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);//----1号：代码用于定义的圆弧的形状和大小的界限// RectF oval = new RectF(centre - radius-40, centre - radius-40, centre+ radius+40, centre + radius+40); //--2号：用于定义的圆弧的形状和大小的界限// RectF ova12 = new RectF(centre - radius-60, centre - radius-60, centre+ radius+60, centre + radius+60);// RectF oval = new RectF(centre - radius+40, centre - radius+40, centre+ radius-40, centre + radius-40); //--2号：用于定义的圆弧的形状和大小的界限// RectF ova12 = new RectF(centre - radius+60, centre - radius+60, centre+ radius-60, centre + radius-60); switch (style) { case STROKE:{ paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(18); paint.setColor(Color.RED); canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根据进度画圆弧 // paint.setStrokeWidth(9);// paint.setColor(Color.YELLOW);// canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //根据进度画圆弧 break; } case FILL:{ paint.setStyle(Paint.Style.FILL_AND_STROKE); paint.setStrokeWidth(18); paint.setColor(Color.RED); if(progress !=0) canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根据进度画圆弧 // paint.setStrokeWidth(9);// paint.setColor(Color.YELLOW);// canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); // break; } } }}二、单环在圈外画弧度
和普通效果代码不同的地方如下，屏蔽167行，打开168行即可：
package tester.ermu.com.pingamedemo;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 { private Paint paint; private int roundColor; private int roundProgressColor; private int textColor; private float textSize; private float roundWidth; private int max; private int progress; private boolean textIsDisplayable; 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.RED);//圆环的颜色 roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);//圆环进度的颜色 textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);//字体颜色 textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);//字体大小 roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);//圆环的宽度 max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);//进度条最大值，一般都为1001 textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);//是否显示中间的进度 style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 1);//进度的风格，实心或者空心 mTypedArray.recycle(); } 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(); } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); int centre = getWidth()/2; //获取圆心的x坐标 Log.i("Text","centre ------1111"+centre); int radius = (int) (centre - roundWidth*2); //圆环的半径 Log.i("Text","radius ------2222"+radius); 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 + ""); 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 } //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);//----1号：代码用于定义的圆弧的形状和大小的界限 RectF oval = new RectF(centre - radius-40, centre - radius-40, centre+ radius+40, centre + radius+40); //--2号：用于定义的圆弧的形状和大小的界限// RectF ova12 = new RectF(centre - radius-60, centre - radius-60, centre+ radius+60, centre + radius+60);// RectF oval = new RectF(centre - radius+40, centre - radius+40, centre+ radius-40, centre + radius-40); //--2号：用于定义的圆弧的形状和大小的界限// RectF ova12 = new RectF(centre - radius+60, centre - radius+60, centre+ radius-60, centre + radius-60); switch (style) { case STROKE:{ paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(18); paint.setColor(Color.RED); canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根据进度画圆弧 // paint.setStrokeWidth(9);// paint.setColor(Color.YELLOW);// canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //根据进度画圆弧 break; } case FILL:{ paint.setStyle(Paint.Style.FILL_AND_STROKE); paint.setStrokeWidth(18); paint.setColor(Color.RED); if(progress !=0) canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根据进度画圆弧 // paint.setStrokeWidth(9);// paint.setColor(Color.YELLOW);// canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); // break; } } }}三、双环效果
代码不同的地方
package tester.ermu.com.pingamedemo;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 { private Paint paint; private int roundColor; private int roundProgressColor; private int textColor; private float textSize; private float roundWidth; private int max; private int progress; private boolean textIsDisplayable; 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.RED);//圆环的颜色 roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);//圆环进度的颜色 textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);//字体颜色 textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);//字体大小 roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);//圆环的宽度 max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);//进度条最大值，一般都为1001 textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);//是否显示中间的进度 style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 1);//进度的风格，实心或者空心 mTypedArray.recycle(); } 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(); } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); int centre = getWidth()/2; //获取圆心的x坐标 Log.i("Text","centre ------1111"+centre); int radius = (int) (centre - roundWidth*2); //圆环的半径 Log.i("Text","radius ------2222"+radius); 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 + ""); 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 } //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);//----1号：代码用于定义的圆弧的形状和大小的界限 RectF oval = new RectF(centre - radius-40, centre - radius-40, centre+ radius+40, centre + radius+40); //--2号：用于定义的圆弧的形状和大小的界限 RectF ova12 = new RectF(centre - radius-60, centre - radius-60, centre+ radius+60, centre + radius+60);// RectF oval = new RectF(centre - radius+40, centre - radius+40, centre+ radius-40, centre + radius-40); //--2号：用于定义的圆弧的形状和大小的界限// RectF ova12 = new RectF(centre - radius+60, centre - radius+60, centre+ radius-60, centre + radius-60); switch (style) { case STROKE:{ paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(18); paint.setColor(Color.RED); canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根据进度画圆弧 paint.setStrokeWidth(9); paint.setColor(Color.YELLOW); canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //根据进度画圆弧 break; } case FILL:{ paint.setStyle(Paint.Style.FILL_AND_STROKE); paint.setStrokeWidth(18); paint.setColor(Color.RED); if(progress !=0) canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根据进度画圆弧 paint.setStrokeWidth(9); paint.setColor(Color.YELLOW); canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); // break; } } }}实心效果环形进度条
这里需要添加或修改的代码如下：
package tester.ermu.com.pingamedemo;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 { private Paint paint; private int roundColor; private int roundProgressColor; private int textColor; private float textSize; private float roundWidth; private int max; private int progress; private boolean textIsDisplayable; 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.RED);//圆环的颜色 roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);//圆环进度的颜色 textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);//字体颜色 textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);//字体大小 roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);//圆环的宽度 max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);//进度条最大值，一般都为1001 textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);//是否显示中间的进度 style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 1);//进度的风格，实心或者空心 mTypedArray.recycle(); } 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(); } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); int centre = getWidth()/2; //获取圆心的x坐标 Log.i("Text","centre ------1111"+centre); int radius = (int) (centre - roundWidth*2); //圆环的半径 Log.i("Text","radius ------2222"+radius); 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 + ""); 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 } //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);//----1号：代码用于定义的圆弧的形状和大小的界限// RectF oval = new RectF(centre - radius-40, centre - radius-40, centre+ radius+40, centre + radius+40); //--2号：用于定义的圆弧的形状和大小的界限// RectF ova12 = new RectF(centre - radius-60, centre - radius-60, centre+ radius+60, centre + radius+60); RectF oval = new RectF(centre - radius+40, centre - radius+40, centre+ radius-40, centre + radius-40); //--2号：用于定义的圆弧的形状和大小的界限 RectF ova12 = new RectF(centre - radius+60, centre - radius+60, centre+ radius-60, centre + radius-60); switch (style) { case STROKE:{ paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(18); paint.setColor(Color.RED); canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根据进度画圆弧 paint.setStrokeWidth(9); paint.setColor(Color.YELLOW); canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); //根据进度画圆弧 break; } case FILL:{ paint.setStyle(Paint.Style.FILL_AND_STROKE); paint.setStrokeWidth(18); paint.setColor(Color.RED); if(progress !=0) canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根据进度画圆弧 paint.setStrokeWidth(9); paint.setColor(Color.YELLOW); canvas.drawArc(ova12, 0, 360 * progress / max, false, paint); // break; } } }}四、Xml布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:android_custom="http://schemas.android.com/apk/res/tester.ermu.com.pingamedemo" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:background="#000000" tools:ignore="ResAuto"> <tester.ermu.com.pingamedemo.RoundProgressBar android:id="@+id/roundBar" android:layout_width="200dip" android:layout_height="200dip" android:layout_gravity="center" android:layout_marginTop="30dp" android:layout_marginBottom="79dp" android_custom:roundColor="#ffffff" android_custom:roundProgressColor="@android:color/black" android_custom:textColor="#9A32CD" android_custom:roundWidth="15dip" android_custom:textSize="18sp" /> <Button android:id="@+id/button1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:background="#ffffff" android:layout_margin="5dp" android:text="开始" /></LinearLayout>
五、MainActivity中代码的引用
package tester.ermu.com.pingamedemo;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity implements OnClickListener{ private RoundProgressBar roundBar ; private int progress = 0; private Button button1,button2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_cricle_progress); init(); } private void init() { roundBar = (RoundProgressBar) findViewById(R.id.roundBar); button1 = (Button)findViewById(R.id.button1); button1.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()){ case R.id.button1: new Thread(new Runnable() { @Override public void run() { while(progress <= 100){ progress += 3; System.out.println(progress); roundBar.setProgress(progress); try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } } } }).start(); break; } }}六、自定义属性
<?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>
到此，关于“自定义视图view怎么实现环形进度条”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注编程网网站，小编会继续努力为大家带来更多实用的文章！
