FanView
public class FanView extends View implements View.OnClickListener {

private Paint mFanPaint,mTextPaint;//扇形畫筆和文字畫筆
private ArrayList<Fan> mFanList = new ArrayList<>();
private RotateAnimation mRotateAnimation;//控制元件旋轉動畫

private boolean isStartAnim;//是否已經啟動了動畫

public FanView(Context context) {
    super(context);
    init();
}

public FanView(Context context,  AttributeSet attrs) {
    super(context, attrs);
    init();
}

public FanView(Context context,  AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init();
}

private void init(){
    mFanPaint = new Paint();
    mFanPaint.setStyle(Paint.Style.FILL);//設定畫筆為全填充


    mTextPaint = new Paint();
    mTextPaint.setTextSize(60);//設定文字大小

    setOnClickListener(this);//新增點選事件
}

/**
 * 新增扇形
 */
public void addFan(Fan fan){
    mFanList.add(fan);//新增扇形
    invalidate();//重新整理控制元件，回撥onDraw方法
}


@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    //*****定義矩形區域用於畫環形：圓，橢圓等
    RectF rectF = new RectF();
    rectF.left = 0;
    rectF.top=0;
    rectF.right=800;
    rectF.bottom = 800;
    //*****定義矩形區域用於畫環形：圓，橢圓等

    for (int i = 0; i <mFanList.size() ; i++) {
        Fan fan = mFanList.get(i);

        //*********畫扇形
        mFanPaint.setColor(fan.getColor());
        canvas.drawArc(rectF,fan.getStartAngle(),
                360/mFanList.size(),true,mFanPaint);//畫扇形
        //********畫扇形

        //********把文字畫到扇形上
        Path path = new Path();
        path.addArc(rectF,fan.getStartAngle(), 360/mFanList.size());//定義文字區域，需要傳入開始角度和結束角度
        mTextPaint.setColor(Color.BLACK);

        //沿路徑path畫文字，第一個引數是文字，第二個引數是路徑，
        // 第三個引數是水平距離，也就是扇形的起點邊界
        //第四個引數是縱向距離
        canvas.drawTextOnPath(fan.getName(),path,200,60,mTextPaint);
        //********把文字畫到扇形上
    }

    mFanPaint.setColor(Color.BLACK);
    canvas.drawCircle(400,400,150,mFanPaint);//畫中間圓

    mTextPaint.setColor(Color.WHITE);
    canvas.drawText("Start",400-mTextPaint.measureText("Start")/2,
            400+mTextPaint.getTextSize()/2,mTextPaint);//畫中間文字

}


@Override
public void onClick(View v) {
    if (isStartAnim){
        this.clearAnimation();

        mRotateAnimation = new RotateAnimation(0,(int)(360*Math.random()),400,400);
        mRotateAnimation.setDuration(100);
        mRotateAnimation.setRepeatCount(0);//重複次數
        mRotateAnimation.setFillEnabled(true);//動畫執行保留目前的狀態
        mRotateAnimation.setFillAfter(true);//動畫執行結束保留目前的狀態
        startAnimation(mRotateAnimation);
        isStartAnim =false;
    }else{
        mRotateAnimation = new RotateAnimation(0,360,400,400);
        mRotateAnimation.setDuration(1000);
        mRotateAnimation.setRepeatCount(-1);//重複次數
        mRotateAnimation.setInterpolator(new LinearInterpolator());//差速器：勻速執行

        startAnimation(mRotateAnimation);
        isStartAnim = true;
    }
}
 

}
MainActivity
public class MainActivity extends AppCompatActivity {

FanView mFanView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_car);
    mFanView = findViewById(R.id.fan_view);
    int[] colorArray = new int[]{Color.BLUE,Color.RED,Color.GRAY,
    Color.YELLOW,Color.RED,Color.GREEN};
    for (int i = 0; i <6 ; i++) {
        Fan fan = new Fan();
        fan.setStartAngle(i*60);
        fan.setName("扇形"+i);
        fan.setColor(colorArray[i]);
        mFanView.addFan(fan);
    }
}
 

}
bean類
package com.baidu.yuanpan.bean;

public class Fan {
int startAngle;
String name;
int color;

public Fan() {
    this.startAngle = startAngle;
    this.name = name;
    this.color = color;
}

public int getStartAngle() {
    return startAngle;
}

public void setStartAngle(int startAngle) {
    this.startAngle = startAngle;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public int getColor() {
    return color;
}

public void setColor(int color) {
    this.color = color;
}

@Override
public String toString() {
    return "Fan{" +
            "startAngle=" + startAngle +
            ", name='" + name + '\'' +
            ", color=" + color +
            '}';
}
 

}
佈局載入

<android.support.constraint.ConstraintLayout 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=".MainActivity">

<com.baidu.yuanpan.View.FanView
    android:id="@+id/fanView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />

</android.support.constraint.ConstraintLayout>