Qt for android currently has a mapping from press-and-hold to right-mouse-button 
press. This logic is implemented in the android plugin, and there is no way to 
disable it for applications that need to handle long presses in a different 
way.
This needs to be fixed in a different way for 5.2, but for now, the best solution is to disable the mapping by default.
- is required for
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                    QTBUG-30749 Android QtQuick1 MouseArea PressAndHold not working properly -         
- Closed
 
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                    QTBUG-31331 Long press interferes with MouseArea on Android -         
- Closed
 
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