Android自定义View——仿ViVO X6 极速闪充动画效果

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——弧线展示图，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);
}

}

好了，所有的代码都列出来了，有什么不懂的可以在下方留言，如果有更好的想法，也可以分享一下哈。最后，祝大家周末愉快！