太极

来源：互联网发布：量化投资数据挖掘 pdf 编辑：程序博客网时间：2024/04/28 23:30
<?xml version="1.0" encoding="utf-8"?><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"    >    <fengras.com.taiji.view.TaiJiView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Hello World!" /></RelativeLayout>package fengras.com.taiji.view;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.RectF;import android.util.AttributeSet;import android.view.View;import android.view.animation.Animation;import android.view.animation.LinearInterpolator;import android.view.animation.RotateAnimation;public class TaiJiView extends View implements View.OnClickListener {    private RotateAnimation rotateAnimation;    private int width = 360;    private int height = 360;    private int padding = 5;    private Paint mPaint;    private RectF mRectf;    private RectF blackHalfRect;    private RectF whiteHalfRect;    public TaiJiView(Context context) {        this(context, null);    }    public TaiJiView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public TaiJiView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        initPaint();        initAnim();        setOnClickListener(this);    }    /**     * 初始化画笔     */    private void initPaint() {        mPaint = new Paint();        mPaint.setAntiAlias(true);        mPaint.setStrokeWidth(5);    }    private void initAnim() {        //以view的中心点为旋转参考点        rotateAnimation = new RotateAnimation(0f, 360f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);        rotateAnimation.setRepeatCount(-1);        rotateAnimation.setFillAfter(false);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        setMeasuredDimension(width, height);        mRectf = new RectF(0, 0, width, width);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        drawCirCle(canvas);        drawHalfCirCle(canvas);        drawSmallCircle(canvas);    }    /**     * 绘制二个小圆点     *     * @param canvas     */    private void drawSmallCircle(Canvas canvas) {        mPaint.setColor(Color.WHITE);        mPaint.setStyle(Paint.Style.FILL);        canvas.drawCircle(width / 2, width / 4, 20, mPaint);        mPaint.setColor(Color.BLACK);        mPaint.setStyle(Paint.Style.FILL);        canvas.drawCircle(width / 2, width / 4 * 3, 20, mPaint);    }    /**     * 绘制二个半圆 一个黑色 一个白色     *     * @param canvas     */    private void drawHalfCirCle(Canvas canvas) {        //画上面黑色半圆        mPaint.setStyle(Paint.Style.FILL);        mPaint.setColor(Color.BLACK);        blackHalfRect = new RectF(width / 4, 0, width / 2 + width / 4, width / 2);        canvas.drawArc(blackHalfRect, 270, 180, true, mPaint);        mPaint.setStyle(Paint.Style.FILL);        mPaint.setColor(Color.WHITE);        whiteHalfRect = new RectF(width / 4, width / 2, width / 2 + width / 4, width);        canvas.drawArc(whiteHalfRect, 270, -180, true, mPaint);    }    /**     * 画一个简单的圆     *     * @param canvas     */    private void drawCirCle(Canvas canvas) {        mPaint.setStyle(Paint.Style.FILL);        mPaint.setColor(Color.WHITE);        canvas.drawArc(mRectf, 270, 180, true, mPaint);        mPaint.setColor(Color.BLACK);        canvas.drawArc(mRectf, 270, -180, true, mPaint);    }    @Override    public void onClick(View view) {        rotateAnimation.setDuration(1000);        rotateAnimation.setInterpolator(new LinearInterpolator());//不停顿        startAnimation(rotateAnimation);    }}
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