android+环形统计控件,Android环形统计控件

这是一个相对简单的自定义控件，是根据总人数和统计人数的比例，来画出环形统计图，原理就是在同一个圆心上画上不同的圆形和扇形来达到想要的效果，该控件在屏幕适配上海有一些小问题，欢迎大家完善。下面是代码：

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Paint.FontMetrics;

import android.graphics.RectF;

import android.provider.MediaStore.Video;

import android.util.AttributeSet;

import android.view.View;

public class LoopView extends View

{

private int width;

private int height;

private float center_x;

private float center_y;

private float left;

private float right;

private float top;

private float bottom;

private int angle = 90;

private int startAngle = 270;

private float innerRadius;

private float outerRadius;

private float barWidth = 15;

private RectF rect;

// private Paint circleRing;

// private Paint circleColor;

// private Paint textPaint;

private int mAscent;

private Paint loopPaint;

private int count;

private int maxCount;

private int textSize = 47;

public LoopView(Context context)

{

super(context);

loopPaint = new Paint();

}

public LoopView(Context context, AttributeSet attrs)

{

super(context, attrs);

loopPaint = new Paint();

}

public LoopView(Context context, AttributeSet attrs, int defStyleAttr)

{

super(context, attrs, defStyleAttr);

loopPaint = new Paint();

}

public void setCount(int c)

{

count = c;

}

public int getCount()

{

return count;

}

public void setMaxCount(int c)

{

maxCount = c;

}

public int getMaxCount()

{

return maxCount;

}

public void setTextSize(int c)

{

textSize = c;

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)

{

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

width=resolveSize(80, widthMeasureSpec);

height=resolveSize(80, heightMeasureSpec);

int size=(width>height)?height:width;

center_x=width/2;

center_y=height/2;

outerRadius=size/2;

barWidth=outerRadius/5;

innerRadius=outerRadius-barWidth;

left=center_x-outerRadius;

right = center_x + outerRadius;

top = center_y - outerRadius;

bottom = center_y + outerRadius;

rect=new RectF();

rect.set(left, top, right, bottom);

setMeasuredDimension(width, height);

}

@Override

protected void onDraw(Canvas canvas)

{

super.onDraw(canvas);

loopPaint.setColor(Color.GRAY);

loopPaint.setAntiAlias(true);

loopPaint.setStrokeWidth(15);

canvas.drawCircle(center_x, center_y, outerRadius, loopPaint);

loopPaint.setColor(Color.rgb(0, 189, 0));

loopPaint.setAntiAlias(true);

loopPaint.setStrokeWidth(25);

//count = 75;

//maxCount = 100;

angle = (new Double(((float) count / (float) maxCount) * 360)).intValue();

canvas.drawArc(rect, startAngle, angle, true,loopPaint);

loopPaint.setColor(Color.WHITE);

loopPaint.setAntiAlias(true);

loopPaint.setStrokeWidth(15);

canvas.drawCircle(center_x, center_y, innerRadius, loopPaint);

loopPaint.setColor(Color.rgb(0, 189, 0));

loopPaint.setAntiAlias(true);

loopPaint.setTextAlign(Paint.Align.CENTER);

loopPaint.setStrokeWidth(15);

loopPaint.setTextSize(textSize);

FontMetrics fontMetrics = loopPaint.getFontMetrics();

float fontHeight = fontMetrics.bottom - fontMetrics.top;

float textBaseY = height - (height - fontHeight) / 2 - fontMetrics.bottom;

canvas.drawText(String.valueOf(count), center_y, textBaseY, loopPaint);

}

public void refalsh()

{

invalidate();

}

}

源码下载：http://download.youkuaiyun.com/detail/y280903468/9158929

效果图：