Android 高手进阶,自己定义圆形进度条
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背景介绍
在android 开发中,我们常常遇到各种各样绚丽的控件,所以,依靠我们Android本身所带的控件是远远不够的,许多时候须要我们自定义控件,在开发的过程中。我们公司遇到了一种须要自己写的一个自定义带进度的圆形进度条,看起来很的绚丽,当然另一些其它的。比方:水纹形的圆形进度条等效果都是很nice的。假设哪位朋友有实现,希望分享出来,我也好学习学习。
好了多的不说。接下来,我们就来看看来怎样实现圆形进度条。
原文地址:http://blog.csdn.net/xiaanming/article/details/10298163
一:先上效果图
二:实例代码
1.自己定义属性
<span style="font-size:14px;"><?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></span>
ps:自己定义属性呢。事实上大家也许不是非常明确,有些小伙伴们也许知道,我这样用。能够调用它的一个值。能够获取值,或者说赋予值。比方:你用Android 系统本身所带的控件,textview其它等,你知道他有height。width,textsize,textcolor等,这些属性。你能赋值。可是有去理解过如何去获取值么。假设不了解,没关系,我这有一篇鸿洋写的比較具体。推荐给你:http://blog.csdn.net/lmj623565791/article/details/45022631,还在等什么。赶紧戳进去,带你装逼带你飞。
2.自己定义控件
源代码1:
<span style="font-size:14px;">package com.example.testdemo.view; 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.RectF; import android.graphics.Typeface; import android.util.AttributeSet; import android.view.View; import com.example.testdemo.R; /** * 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 * * @author zengtao 2015年5月12日下午7:43:32 * * */ @SuppressLint("DrawAllocation") 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); // 获取自己定义属性和默认值 roundColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundColor, Color.rgb(228, 232, 237)); roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.rgb(216, 6, 7)); textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.rgb(216, 6, 7)); textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 18); roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 3); 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); /** * 1.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 /** * 2.画进度百分比 */ paint.setStrokeWidth(0); paint.setColor(textColor); paint.setTextSize(textSize); paint.setTypeface(Typeface.DEFAULT); // 设置字体 // 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 int percent = (int) (((float) progress / (float) max) * 100); float textWidth = paint.measureText(percent + "%"); // 測量字体宽度,我们须要依据字体的宽度设置在圆环中间 if (textIsDisplayable && style == STROKE) { canvas.drawText(percent + "%", centre - textWidth / 2, centre + textSize/2, paint); //画出进度百分比 } /** * 3.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, -90, 360 * progress / max, false, paint); // 依据进度画圆弧 break; } case FILL: { paint.setStyle(Paint.Style.FILL_AND_STROKE); if (progress != 0) canvas.drawArc(oval, -90, 360 * progress / max, true, paint); // 依据进度画圆弧 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.须要同步 * * @return */ public synchronized int getProgress() { return progress; } /** * 设置进度。此为线程安全控件,因为考虑多线的问题,须要同步 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; } public int getStyle() { return style; } public void setStyle(int style) { this.style = style; } } </span>
源代码2:
<span style="font-size:14px;">package com.example.testdemo.view; 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.RectF; import android.graphics.Typeface; import android.util.AttributeSet; import android.view.View; import com.example.testdemo.R; /** * 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 * * @author zengtao 2015年5月12日下午7:43:32 * * */ @SuppressLint("DrawAllocation") public class RoundProgressBar2 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 RoundProgressBar2(Context context) { this(context, null); } public RoundProgressBar2(Context context, AttributeSet attrs) { this(context, attrs, 0); } public RoundProgressBar2(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); paint = new Paint(); TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.RoundProgressBar); // 获取自己定义属性和默认值 roundColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundColor, Color.rgb(228, 232, 237)); roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.rgb(216, 6, 7)); textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.rgb(216, 6, 7)); textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 18); roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 3); 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 /** * 画进度百分比 */ paint.setStrokeWidth(0); paint.setColor(textColor); paint.setTextSize(textSize); paint.setTypeface(Typeface.DEFAULT); // 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("抢"); // 測量字体宽度。我们须要依据字体的宽度设置在圆环中间 if (textIsDisplayable && style == STROKE) { canvas.drawText("抢", centre - textWidth / 2, centre + textSize / 2 - 4, 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, -90, 360 * progress / max, false, paint); // 依据进度画圆弧 break; } case FILL: { paint.setStyle(Paint.Style.FILL_AND_STROKE); if (progress != 0) canvas.drawArc(oval, -90, 360 * progress / max, true, paint); // 依据进度画圆弧 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.须要同步 * * @return */ public synchronized int getProgress() { return progress; } /** * 设置进度,此为线程安全控件,因为考虑多线的问题。须要同步 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; } } </span>
三.详细调用
<span style="font-size:14px;">package com.example.testdemo; import android.annotation.SuppressLint; import android.app.Activity; import android.graphics.Color; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import com.example.testdemo.view.RoundProgressBar; import com.example.testdemo.view.RoundProgressBar2; /** * 主界面 * @author zengtao 2015年6月10日 下午4:02:13 * */ public class MainActivity extends Activity { private RoundProgressBar2 r3; private RoundProgressBar r1, r2, r4, r5; private int pro1 = 80; // 想要显示的进度值:如项目中。从server返回的数据 private int progress = 0; private boolean flag = false; private MyThread thread1; private MyThread2 thread2; private Button start; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); setRoundAttribute(); // 可设置可不设置 } /** * 開始方法 */ private void start() { // 线程1 thread1 = new MyThread(); thread1.start(); // 线程2 thread2 = new MyThread2(); thread2.start(); } /** * 初始化控件 */ private void initView() { r1 = (RoundProgressBar) findViewById(R.id.prpgress1); r2 = (RoundProgressBar) findViewById(R.id.prpgress2); r3 = (RoundProgressBar2) findViewById(R.id.prpgress3); r4 = (RoundProgressBar) findViewById(R.id.prpgress4); r5 = (RoundProgressBar) findViewById(R.id.prpgress5); start = (Button) findViewById(R.id.start); start.setOnClickListener(listener); } /** * 设置圆的属性 */ private void setRoundAttribute() { r1.setRoundWidth(10); r1.setTextColor(Color.parseColor("#00ff00")); r1.setCricleColor(Color.parseColor("#ff0000")); r2.setRoundWidth(20); r2.setTextColor(Color.parseColor("#0000ff")); r2.setCricleColor(Color.parseColor("#ff00ff")); r4.setRoundWidth(20); r4.setTextColor(Color.parseColor("#ff00ff")); r4.setCricleColor(Color.parseColor("#ff0000")); r4.setStyle(0); r4.setRoundWidth(20); r4.setTextColor(Color.parseColor("#000000")); r4.setCricleColor(Color.parseColor("#ffff00")); r4.setStyle(1); } /** * 点击事件 */ OnClickListener listener = new OnClickListener() { @Override public void onClick(View v) { if (v == start) { start(); } } }; /** * 用于更新ui */ @SuppressLint("HandlerLeak") private Handler mHandler = new Handler() { public void handleMessage(android.os.Message msg) { final int x = msg.what; final int temp = (int) msg.obj; if (x == 0 * 1) { if (pro1 - temp > 0) { r1.setProgress(temp); r2.setProgress(temp); r3.setProgress(temp); r4.setProgress(temp); r5.setProgress(temp); } else { r1.setProgress(pro1); r2.setProgress(pro1); r3.setProgress(pro1); r4.setProgress(pro1); r5.setProgress(pro1); thread1.stopThread(); } } else if (x == 0 * 2) { if (pro1 - temp > 0) { r1.setProgress(temp); r2.setProgress(temp); r3.setProgress(temp); r4.setProgress(temp); r5.setProgress(temp); } else { r1.setProgress(pro1); r2.setProgress(pro1); r3.setProgress(pro1); r4.setProgress(pro1); r5.setProgress(pro1); thread2.stopThread(); } } }; }; /** * 线程,控制进度动画 * @author zengtao 2015年6月10日 下午4:31:11 * */ class MyThread extends Thread { @Override public void run() { while (!flag) { try { progress += 1; Message msg = new Message(); msg.what = 0 * 1; msg.obj = progress; Thread.sleep(100); mHandler.sendMessage(msg); } catch (InterruptedException e) { e.printStackTrace(); } } } public void stopThread() { flag = true; } } /** * 线程。控制进度动画 * @author zengtao 2015年6月10日 下午4:31:11 * */ class MyThread2 extends Thread { @Override public void run() { while (!flag) { try { progress += 2; Message msg = new Message(); msg.what = 0 * 2; msg.obj = progress; Thread.sleep(200); mHandler.sendMessage(msg); } catch (InterruptedException e) { e.printStackTrace(); } } } public void stopThread() { flag = true; } } @Override protected void onDestroy() { super.onDestroy(); if (thread1 != null) { thread1.stopThread(); } if (thread2 != null) { thread2.stopThread(); } } } </span>
四.总结
实现以上步骤,就实现了一个安全可靠的自己定义控件的实现。看起来简简单单,不说分分钟,可是略微花点时间这就是你的。
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