Android 简单的圆形刻度刻画

一直xi最近没事做了个自定义view 绘图绘制圆形的刻度进度条具体源码如下
import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.os.Handler;import android.os.Message;import android.util.AttributeSet;import android.view.View;/** * Created by Administrator on 2016/3/30. */public class SampleView2 extends View {    private int mWidth;//控件宽度    private int mHeight;//控件高度    private int mBigRadius = 100;//大半径    private int mScale = 20;//刻度长度    private int mSmallRadius;//里面小圆的半径    private Paint mPaint;//画笔    private int index = 50;//刻度数    private double angle = 360d;//角度    private double smalAngle;//每个小的刻度角度    private int indexSmal = 0;//标记刻度    private boolean boolStart = true;    public SampleView2(Context context) {        this(context, null);    }    public SampleView2(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public SampleView2(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        init();    }    private void init() {        mSmallRadius = mBigRadius - mScale;        mPaint = new Paint();        mPaint.setStrokeWidth(3);        mPaint.setColor(Color.RED);        mPaint.setAntiAlias(true);        smalAngle = angle / index;        indexSmal = index;    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        int widhSize = getResolveSize(200, widthMeasureSpec);        int heightSize = getResolveSize(200, heightMeasureSpec);        if (widhSize > heightSize) {            heightSize = widhSize;        }        mWidth = widhSize;        mHeight = heightSize;        setMeasuredDimension(widhSize, heightSize);    }    @Override    protected void onDraw(Canvas canvas) {        int centerWidth = mWidth / 2;        int centerheight = mHeight / 2;        for (int i = 0; i < index; i++) {            float cosAngle = (float) Math.cos(Math.toRadians(smalAngle * i));            float sinAngle = (float) Math.sin(Math.toRadians(smalAngle * i));            if (indexSmal == i) {                mPaint.setColor(Color.BLACK);            } else {                mPaint.setColor(Color.RED);            }            canvas.drawLine(centerWidth + mSmallRadius * cosAngle, centerheight - mSmallRadius * sinAngle,                    centerWidth + mBigRadius * cosAngle, centerheight - mBigRadius * sinAngle, mPaint);        }    }    private int getResolveSize(int size, int measureSec) {        int result = size;        int meSize = MeasureSpec.getSize(measureSec);        int meMode = MeasureSpec.getMode(measureSec);        switch (meMode) {            case MeasureSpec.AT_MOST:                result = Math.min(size, meSize);                break;            case MeasureSpec.EXACTLY:                result = meSize;                break;            case MeasureSpec.UNSPECIFIED:                result = size;                break;        }        return result;    }    public void startThread() {        boolStart = true;        new Thread(new Runnable() {            @Override            public void run() {                while (boolStart) {                    try {                        Thread.sleep(50);                        if(indexSmal == 0){                            indexSmal = index;                        }                        indexSmal --;                        handler.sendEmptyMessage(1);                    } catch (Exception e) {                        e.printStackTrace();                    }                }            }        }).start();    }    private Handler handler = new Handler(){        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            invalidate();        }    };    public void endThread(){        boolStart = false;    }}
参考文献是 http://www.2cto.com/kf/201505/397558.html
Android 简单的圆形刻度刻画_第1张图片
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