ACTION_DOWN не вызывается для нескольких событий касания различных представлений в android переработке - PullRequest
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ACTION_DOWN не вызывается для нескольких событий касания различных представлений в android переработке

0 голосов
/ 21 апреля 2020

У меня есть просмотрщик, который имеет несколько изображений. Представления о нажатых и отпущенных событиях должны регистрироваться, что должно работать даже при одновременном касании нескольких изображений и прослушивании в общей функции.

Мне удалось прослушать ACTION_DOWN (0), ACTION_MOVE (2) & ACTION_UP (1) события для одного просмотра за один раз.

Но когда Я нажимаю одновременно несколько изображений, он не обнаруживает ACTION_DOWN для последующих просмотров и вместо этого начинается с ACTION_MOVE. ACTION_UP запускается в конце.

Вот журнал с отметкой времени, событиями и именами представлений 


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 touchListener: timestamp 1587461653643 2-EVENT View::imgview1
 touchListener: timestamp 1587461653659 2-EVENT View::imgview1
 touchListener: timestamp 1587461653676 2-EVENT View::imgview1
 -----trimmed because of too much repeatation------
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 touchListener: timestamp 1587461658093 2-EVENT View::imgview1
 touchListener: timestamp 1587461658103 1-EVENT View::imgview_three
 touchListener: timestamp 1587461658103 1-EVENT View::imgview_2
 touchListener: timestamp 1587461658103 2-EVENT View::imgview1
 touchListener: timestamp 1587461658104 1-EVENT View::imgview_three
 touchListener: timestamp 1587461658104 1-EVENT View::imgview_2
 touchListener: timestamp 1587461658107 2-EVENT View::imgview1
 touchListener: timestamp 1587461658111 2-EVENT View::imgview_three
 touchListener: timestamp 1587461658111 2-EVENT View::imgview1
 touchListener: timestamp 1587461658124 2-EVENT View::imgview_three
 touchListener: timestamp 1587461658124 2-EVENT View::imgview1
 touchListener: timestamp 1587461658130 1-EVENT View::imgview_three
 touchListener: timestamp 1587461658130 1-EVENT View::imgview1
 touchListener: timestamp 1587461658130 1-EVENT View::imgview_three
 touchListener: timestamp 1587461658130 1-EVENT View::imgview1
 touchListener: timestamp 1587461658143 2-EVENT View::imgview_three
 touchListener: timestamp 1587461658157 2-EVENT View::imgview_three
 touchListener: timestamp 1587461658174 2-EVENT View::imgview_three
 touchListener: timestamp 1587461658192 2-EVENT View::imgview_three
 touchListener: timestamp 1587461658208 2-EVENT View::imgview_three
 touchListener: timestamp 1587461658225 2-EVENT View::imgview_three
 touchListener: timestamp 1587461658235 1-EVENT View::imgview_three
 touchListener: timestamp 1587461658235 1-EVENT View::imgview_three

Дополнительная информация: я заблокировал прокрутку RecyclerView в onInterceptTouchEvent с помощью rv.scrollState == RecyclerView.SCROLL_STATE_DRAGGING, но Я не подозреваю о каких-либо проблемах, поскольку одно касание работает нормально.

В коде нет использования слушателя жестов или масштабирования

Селекторы, примененные к просмотрам изображений, не имеют проблем с настройкой android: state_pressed, android: state_focused, android: state_selected соответствующие изображения в сценарии multi touch / click / select . Таким образом, часть представления XML, управляемая собственным кодом, равна solid, но сторона touchListener не может извлечь выгоду из этой рабочей точности. Или это может ?

Так должны работать функции прослушивания касаний, прослушивающие касания нескольких видов?

Если да - мне придется написать глупое исправление трактовки первого ACTION_MOVE как ACTION_DOWN, представляющего собой кроличью нору производительности, с отслеживанием просмотров в памяти по таким быстрым вызовам функций.

Редактировать: Изменяемая функция 

    imgview1.onTouch {v, event -> touchListener(v, event, position)}
    imgview_2.onTouch {v, event -> touchListener(v, event, position)}
    imgview_three.onTouch {v, event -> touchListener(v, event, position)}

    private fun touchListener(v: View, event: MotionEvent, position: Int): Boolean {
        var globalRect = Rect()
        v.getGlobalVisibleRect(globalRect)
        println("actionMasked ^^^ pointers-${event.pointerCount} time-${System.currentTimeMillis()} ${event.actionMasked}-EVENT View::${v.id}")

        return true     // tried with return false as well, true gave me pointer count of 3 once when i touched 4 buttons
    }
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