一直都在看自定义View，经过一个星期的坚持，基本上能够写出一些比较实用的控件效果了，今天天气太热，就待在家里玩手机，然后手机没电了，在充电的时候，看到了手机的充电动画，觉得挺酷，然后自己我就仔细的分析了一下这里的动画内容，就觉得，这个我也能写出来，所以就有了这篇博客。纯属原创。

先看看效果，因为图片的原因，只能看到静态的。

这个就是效果图了。当然了，这么看好像不怎么样，但是配上了动画，还是挺好看的。

自定义控件的话，其实做的多了，运用的多了，就会觉得自定义View，跟在Photo shop 里面画图一样，我们通过建立图层，然后再图层里面绘制自己想要的效果。

这里其实也是一样的，运用到了我前面讲的一些知识，比如这篇：

Android自定义View弧线进度控件，原理上大体相当，结合这次的效果，我们看看，这里面是有四个弧形，两个圆，还有一个类似于时钟刻度的效果。所以知道这些的话，这就比较容易实现了。

首先，新建一个类，取名为VIVOPhone,然后继承自View，重载三个构造函数，然后进入主题。

同样的，我们先看看运用到了哪些变量

// 定义五个画笔 private Paint mSmileRing, mBigRing, mInCrilePaint, mInLine, mTextPaint; // 控件的高宽 private float mWidth, mHeight; // 矩形的空间 private RectF mRectF; // 四个弧线的开始角度 private float startAngle = 270, startAngle2 = 270, startAngle3 = 270, startAngle4 = 270, sweepAngle = 90; // 文字 private String text = "70%"; // 文字的大小 private float tvSize = 80; // 刻度的进度 private float progress;

然后我们开始初始化数据。

private void initView() { mSmileRing = new Paint(); mSmileRing.setAntiAlias(true); mSmileRing.setStrokeWidth(5); mSmileRing.setStyle(Style.STROKE); mSmileRing.setColor(Color.parseColor("#12ADFF")); mBigRing = new Paint(); mBigRing.setAntiAlias(true); mBigRing.setStrokeWidth(20); mBigRing.setStyle(Style.STROKE); mBigRing.setColor(Color.parseColor("#12ADFF")); mInCrilePaint = new Paint(); mInCrilePaint.setAntiAlias(true); mInCrilePaint.setStrokeWidth((float) 0.5); mInCrilePaint.setStyle(Style.STROKE); mInCrilePaint.setColor(Color.parseColor("#eeeeee")); mInLine = new Paint(); mInLine.setAntiAlias(true); mInLine.setStrokeWidth(3); mInLine.setColor(Color.parseColor("#00ff00")); mTextPaint = new Paint(); mTextPaint.setAntiAlias(true); mTextPaint.setStrokeWidth(3); mTextPaint.setTextSize(tvSize); mTextPaint.setColor(Color.parseColor("#ffffff")); }

这里主要是对画笔进行初始化，包括设置大小、宽度、样式、颜色等等。这个方法，最后还是要在构造函数里面调用。

画笔初始化好了，接下来就看看怎么给变量赋值；

一样的，我们还是在onSizeChange()方法里面写赋值的操作。代码如下：

@Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mWidth = w; mHeight = h; }

这里很简单，就是给高跟宽赋值。

好了，最后看看onDraw方法是怎么写的。

@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvasOutArc1(canvas, mRectF); canvasOutArc2(canvas, mRectF); canvasOutArc3(canvas, mRectF); canvasOutArc4(canvas, mRectF); drawCircle(canvas); drawCircleIn(canvas); canvasDrawText(canvas); }

没错，我这里把每一个的绘制都抽成了方法，这样是为了更好的管理和阅读。看到一个：

/** * 绘制最外面的弧线 * * @param canvas */ private void canvasOutArc1(Canvas canvas, RectF mRectF) { mRectF = new RectF((float) (mWidth * 0.1), (float) (mWidth * 0.1), (float) (mWidth * 0.9), (float) (mWidth * 0.9)); canvas.drawArc(mRectF, startAngle, sweepAngle + 90, false, mSmileRing); }

这个是最外层的圆，接下来就是第二个，第三个，第四个，我全部列出来。

/** * 绘制外层的第二个 * * @param canvas * @param mRectF */ private void canvasOutArc2(Canvas canvas, RectF mRectF) { mRectF = new RectF((float) (mWidth * 0.14), (float) (mWidth * 0.14), (float) (mWidth * 0.85), (float) (mWidth * 0.85)); canvas.drawArc(mRectF, startAngle2, sweepAngle + 30, false, mBigRing); }

第三个：

/** * 绘制里面第二个小的 * * @param canvas */ private void canvasOutArc3(Canvas canvas, RectF mRectF) { mRectF = new RectF((float) (mWidth * 0.22), (float) (mWidth * 0.22), (float) (mWidth * 0.795), (float) (mWidth * 0.795)); canvas.drawArc(mRectF, startAngle3, sweepAngle, false, mSmileRing); }

第四个：

/** * 绘制里面第二个小的 * * @param canvas */ private void canvasOutArc4(Canvas canvas, RectF mRectF) { mRectF = new RectF((float) (mWidth * 0.255), (float) (mWidth * 0.255), (float) (mWidth * 0.75), (float) (mWidth * 0.75)); canvas.drawArc(mRectF, startAngle4, sweepAngle, false, mBigRing); }

然后就是两个圆了：

第一个圆，这里面还包含了锯齿：

// 绘制内切圆和锯齿 private void drawCircle(Canvas canvas) { float radius = (float) (mHeight - (mHeight * 0.3) * 2 - (mWidth * 0.17)); float yuanX = (float) (mHeight / 2); float yuanY = (float) (mWidth / 2); canvas.drawCircle(yuanX, yuanY, radius, mInCrilePaint); canvas.save(); float nowWidth = (float) (getMeasuredWidth()); float nowHeight = getMeasuredHeight(); for (int i = 0; i < 72; i++) { // canvas.drawLine(nowWidth / 2, nowHeight / 2 - nowWidth / 2, // nowWidth / 2, nowHeight / 2 - nowWidth / 2 + 30, mInLine); if (i >= progress) { mInLine.setColor(Color.parseColor("#555555")); } else { mInLine.setColor(Color.parseColor("#00ff00")); } canvas.drawLine(nowWidth / 2, (float) (nowHeight / 2 - nowWidth / 2 + mWidth / 3.7), nowWidth / 2, (float) (nowHeight / 2 - nowWidth / 2 + mWidth * 0.05 + mWidth / 3.7), mInLine); canvas.rotate(5, getWidth() / 2, getHeight() / 2); } }

第二个圆：

// 绘制最里面的圆 private void drawCircleIn(Canvas canvas) { float radius = (float) (mHeight - (mHeight * 0.3) * 2 - (mWidth * 0.22)); float yuanX = (float) (mHeight / 2); float yuanY = (float) (mWidth / 2); canvas.drawCircle(yuanX, yuanY, radius, mInCrilePaint); canvas.save(); }

最后暴露给外面一个方法，用于动画效果：

public void setData(int startAngle, float d) { this.startAngle = startAngle; this.startAngle2 = 360 - startAngle; this.startAngle3 = startAngle; this.startAngle4 = 360 - startAngle; progress = d / 4; postInvalidateDelayed(500); }

这里为了效果更明显，我让它五毫秒的速度更新UI，这里就是View的全部内容，下面，我把所有的代码都列出来：

布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/bg" tools:context=".MainActivity" > <com.example.vivoopen.weight.VivoView android:id="@+id/vivo" android:layout_width="180dip" android:layout_height="180dip" android:layout_centerInParent="true" /> </RelativeLayout>

MainActivity.java:

public class MainActivity extends Activity { private VivoView view; private boolean isRun = true; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); view = (VivoView) findViewById(R.id.vivo); new Thread(new Runnable() { public void run() { synchronized (view) { while (isRun) { Message msg; for (int i = 0; i < n2; i = i + 10) { msg = new Message(); msg.obj = i; SystemClock.sleep(100); msg.what = 1; handler.sendMessage(msg); } msg = new Message(); msg.what = 2; handler.sendMessage(msg); } } } }).start(); } int n2 = 2; private Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { switch (msg.what) { case 1: int a = (Integer) msg.obj; view.setData(a, a); break; case 2: n2 = 359; break; default: break; } }; }; }

VivoView.java:

public class VivoView extends View { // 定义五个画笔 private Paint mSmileRing, mBigRing, mInCrilePaint, mInLine, mTextPaint; // 控件的高宽 private float mWidth, mHeight; // 矩形的空间 private RectF mRectF; // 四个弧线的开始角度 private float startAngle = 270, startAngle2 = 270, startAngle3 = 270, startAngle4 = 270, sweepAngle = 90; // 文字 private String text = "70%"; // 文字的大小 private float tvSize = 80; // 刻度的进度 private float progress; public VivoView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initView(); } public VivoView(Context context, AttributeSet attrs) { super(context, attrs); initView(); } public VivoView(Context context) { super(context); initView(); } private void initView() { mSmileRing = new Paint(); mSmileRing.setAntiAlias(true); mSmileRing.setStrokeWidth(5); mSmileRing.setStyle(Style.STROKE); mSmileRing.setColor(Color.parseColor("#12ADFF")); mBigRing = new Paint(); mBigRing.setAntiAlias(true); mBigRing.setStrokeWidth(20); mBigRing.setStyle(Style.STROKE); mBigRing.setColor(Color.parseColor("#12ADFF")); mInCrilePaint = new Paint(); mInCrilePaint.setAntiAlias(true); mInCrilePaint.setStrokeWidth((float) 0.5); mInCrilePaint.setStyle(Style.STROKE); mInCrilePaint.setColor(Color.parseColor("#eeeeee")); mInLine = new Paint(); mInLine.setAntiAlias(true); mInLine.setStrokeWidth(3); mInLine.setColor(Color.parseColor("#00ff00")); mTextPaint = new Paint(); mTextPaint.setAntiAlias(true); mTextPaint.setStrokeWidth(3); mTextPaint.setTextSize(tvSize); mTextPaint.setColor(Color.parseColor("#ffffff")); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mWidth = w; mHeight = h; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvasOutArc1(canvas, mRectF); canvasOutArc2(canvas, mRectF); canvasOutArc3(canvas, mRectF); canvasOutArc4(canvas, mRectF); drawCircle(canvas); drawCircleIn(canvas); canvasDrawText(canvas); } // 绘制文字 private void canvasDrawText(Canvas canvas) { float textSize = mTextPaint.measureText(text); float x = mWidth / 2 - textSize / 2; float y = mHeight / 2 + textSize / 5; canvas.drawText(text, x, y, mTextPaint); } // 绘制最里面的圆 // 绘制内切圆和锯齿 private void drawCircleIn(Canvas canvas) { float radius = (float) (mHeight - (mHeight * 0.3) * 2 - (mWidth * 0.22)); float yuanX = (float) (mHeight / 2); float yuanY = (float) (mWidth / 2); canvas.drawCircle(yuanX, yuanY, radius, mInCrilePaint); canvas.save(); } // 绘制内切圆和锯齿 private void drawCircle(Canvas canvas) { float radius = (float) (mHeight - (mHeight * 0.3) * 2 - (mWidth * 0.17)); float yuanX = (float) (mHeight / 2); float yuanY = (float) (mWidth / 2); canvas.drawCircle(yuanX, yuanY, radius, mInCrilePaint); canvas.save(); float nowWidth = (float) (getMeasuredWidth()); float nowHeight = getMeasuredHeight(); for (int i = 0; i < 72; i++) { // canvas.drawLine(nowWidth / 2, nowHeight / 2 - nowWidth / 2, // nowWidth / 2, nowHeight / 2 - nowWidth / 2 + 30, mInLine); if (i >= progress) { mInLine.setColor(Color.parseColor("#555555")); } else { mInLine.setColor(Color.parseColor("#00ff00")); } canvas.drawLine(nowWidth / 2, (float) (nowHeight / 2 - nowWidth / 2 + mWidth / 3.7), nowWidth / 2, (float) (nowHeight / 2 - nowWidth / 2 + mWidth * 0.05 + mWidth / 3.7), mInLine); canvas.rotate(5, getWidth() / 2, getHeight() / 2); } } /** * 绘制最外面的弧线 * * @param canvas */ private void canvasOutArc1(Canvas canvas, RectF mRectF) { mRectF = new RectF((float) (mWidth * 0.1), (float) (mWidth * 0.1), (float) (mWidth * 0.9), (float) (mWidth * 0.9)); canvas.drawArc(mRectF, startAngle, sweepAngle + 90, false, mSmileRing); } /** * 绘制外层的第二个 * * @param canvas * @param mRectF */ private void canvasOutArc2(Canvas canvas, RectF mRectF) { mRectF = new RectF((float) (mWidth * 0.14), (float) (mWidth * 0.14), (float) (mWidth * 0.85), (float) (mWidth * 0.85)); canvas.drawArc(mRectF, startAngle2, sweepAngle + 30, false, mBigRing); } /** * 绘制里面第二个小的 * * @param canvas */ private void canvasOutArc3(Canvas canvas, RectF mRectF) { mRectF = new RectF((float) (mWidth * 0.22), (float) (mWidth * 0.22), (float) (mWidth * 0.795), (float) (mWidth * 0.795)); canvas.drawArc(mRectF, startAngle3, sweepAngle, false, mSmileRing); } /** * 绘制里面第二个小的 * * @param canvas */ private void canvasOutArc4(Canvas canvas, RectF mRectF) { mRectF = new RectF((float) (mWidth * 0.255), (float) (mWidth * 0.255), (float) (mWidth * 0.75), (float) (mWidth * 0.75)); canvas.drawArc(mRectF, startAngle4, sweepAngle, false, mBigRing); } public void setData(int startAngle, float d) { this.startAngle = startAngle; this.startAngle2 = 360 - startAngle; this.startAngle3 = startAngle; this.startAngle4 = 360 - startAngle; progress = d / 4; postInvalidateDelayed(500); } }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持查字典教程网。