当EditText没有被聚焦时，我如何扩展它？

public class CustomEditText extends EditText {
    private boolean isFocused; // 是否聚焦

    public CustomEditText(Context context) {
        super(context);
    }

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

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

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // 在没有聚焦时，将高度扩展为原来的两倍
        if (!isFocused) {
            int height = MeasureSpec.getSize(heightMeasureSpec);
            int newHeightMeasureSpec = MeasureSpec.makeMeasureSpec(height * 2, MeasureSpec.EXACTLY);
            super.onMeasure(widthMeasureSpec, newHeightMeasureSpec);
        } else {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        // 在没有聚焦时，绘制一个灰色边框
        if (!isFocused) {
            Rect rect = new Rect(0, 0, getWidth(), getHeight());
            Paint paint = new Paint();
            paint.setStyle(Paint.Style.STROKE);
            paint.setColor(Color.GRAY);
            paint.setStrokeWidth(2);
            canvas.drawRect(rect, paint);
        }
        super.onDraw(canvas);
    }

    @Override
    public void setOnFocusChangeListener(OnFocusChangeListener l) {
        // 重写聚焦变化的监听器，在聚焦状态变化时更新isFocused的值
        super.setOnFocusChangeListener((v, hasFocus) -> {
            isFocused = hasFocus;
            if (l != null) {
                l.onFocusChange(v, hasFocus);
            }
        });
    }
}

// 在布局文件中使用自定义的EditText
<com.example.CustomEditText
    android:id="@+id/customEditText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="Enter text" />

// 在代码中使用自定义的EditText
CustomEditText customEditText = findViewById(R.id.customEditText);