OnTouchListener在3次點擊之後執行繪製

Question

我有自定義視圖並且在該customView類中覆蓋了onTouchEvent。我想單擊customView時顯示三個弧線。我已經實現了下面的代碼來處理該視圖上的點擊事件。

@Override 
public boolean onTouchEvent(final MotionEvent event) { 

    if (event.getActionMasked() == MotionEvent.ACTION_UP) { 
    Paint p = new Paint(); 
    RectF rectF = new RectF(50, 50, 500, 500); 
    p.setColor(Color.BLACK); 
    canvas.drawArc(rectF, 0, 45, true, p); 
    canvas.drawArc(rectF, 145, 45, true, p); 
    canvas.drawArc(rectF, 260, 45, true, p); 
    invalidate(50, 50, 500, 500); 
    return performClick(); 
    } 
    return true; 
} 

請建議我做了什麼錯誤。

Answer 1

爲什麼在點擊完成後需要調用performClick（）？
如果您處理了事件，您應該返回true，否則返回false。所以我認爲corect變體應該是

@Override 
public boolean onTouchEvent(final MotionEvent event) { 

    if (event.getActionMasked() == MotionEvent.ACTION_UP) { 
    Paint p = new Paint(); 
    RectF rectF = new RectF(50, 50, 500, 500); 
    p.setColor(Color.BLACK); 
    canvas.drawArc(rectF, 0, 45, true, p); 
    canvas.drawArc(rectF, 145, 45, true, p); 
    canvas.drawArc(rectF, 260, 45, true, p); 
    invalidate(50, 50, 500, 500); 
    return true; 
    } 
    return false; 
}