TextView 를 사용자 정의 하여 난수 와 랜 덤 색상 가 져 오기

XML 코드 중

사용자 정의 View 의 코드

@SuppressLint("AppCompatCustomView")
public class CustomView extends TextView {
    private Paint paint;
    private RectF rectF;
    private String result="1111";//   
    public CustomView(Context context) {
        super(context);
        initView();
    }

    public CustomView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        initView();
    }
    public void initView(){
        paint=new Paint();
        paint.setStrokeWidth(10);
        paint.setColor(40);
        paint.setColor(Color.RED);
        paint.setTextSize(60);



       this.setOnClickListener(new OnClickListener() {



           @Override
           public void onClick(View v) {
               result = setData();
               int currColor = (int) -(Math.random() * (16777216 - 1) + 1);//      
               setBackgroundColor(currColor);
               invalidate();//  

           }
       });


    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(300,200);
    }
    //        
    public String setData(){
        Random random=new Random();
        Set set=new HashSet<>();
        for (int i=0;set.size()<4;i++){
            int value = random.nextInt(10);
            set.add(value);
        }
        StringBuilder builder=new StringBuilder();
        for (Integer i:set){
            builder.append(i);
        }
        return builder.toString();

    }


    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
       //   
        canvas.drawText(result,80,100,paint);


    }
}