nisrulz/qreader

surfaceCreated not triggered on resume after unlock screen

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#43 opened on Jul 4, 2017

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bughelp wanted

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Description

all is going well, but if you try to press the power button (lock button) surfaceCreatedis not trigerred (SurfaceHolder.Callback surfaceHolderCallback @ line 90)

so this block (@ line 195)

public void start() { if (surfaceView != null && surfaceHolderCallback != null) { //if surface already created, we can start camera if (surfaceCreated) { startCameraView(context, cameraSource, surfaceView); } else { //startCameraView will be invoke in void surfaceCreated surfaceView.getHolder().addCallback(surfaceHolderCallback); } } }

start camera view will never be called. any fix. ?

Contributor guide

Research direction
Investigate the Android lifecycle and SurfaceHolder.Callback behavior on screen lock/unlock. The issue suggests that surfaceCreated is not called after the screen is unlocked. Check if the Activity's onResume properly re registers the callback or if the SurfaceView is destroyed. Consider testing with a minimal example and reviewing Android documentation on SurfaceView lifecycle.
Tech stack
javaandroid
Domain
mobile
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
Android developmentSurfaceViewCamera lifecycle
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60