import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.Animation;
import 
 
android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;

/**
 * Created by 知足 on 2017/11/30.
 */
public class TaiView 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 TaiView(Context context) {
        this(context,null);
    }
    public TaiView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }
    public TaiView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initPaint();
        initAnim();
        setOnClickListener(this);
    }
    /**
     * 初始化畫筆
     */
private void initPaint() {
        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setStrokeWidth(5);
    }
    private void initAnim() {
        //以view的中心點為旋轉參考點
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);
    }

    /**
     * 繪製二個小圓點
     * @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);
    }

    /**
     * 繪製二個半圓 一個黑色 一個白色
     * @param canvas
*/
private void drawHalfCirCle(Canvas canvas) {
        //畫上面黑色半圓
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);
    }
    /**
     * 畫一個簡單的圓
     * @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());//不停頓
startAnimation(rotateAnimation);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context="com.example.taijibaguatu.MainActivity">


    <com.example.taijibaguatu.TaiView
android:layout_width="wrap_content"
android:layout_height="wrap_content" />


</LinearLayout>