Fix crash when enabling bluetooth after starting the app #108
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voroshkov
reviewed
Dec 30, 2019
| if(intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1) == BluetoothAdapter.STATE_ON) { | ||
| bt.runService(); | ||
| } else { | ||
| bt.stopService(); |
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stopping the service on each state change except ON seems not quite safe to me
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BluetoothAdapter.EXTRA_STATE can be either be STATE_OFF, STATE_TURNING_ON, STATE_ON or STATE_TURNING_OFF. In each case except STATE_ON we want the service to be stopped to avoid any invalid state and cover all edge cases. It is correct, that we might be stopping the service several times, but stopping an already stopped service shouldn't change the program state at all.
Stopping the service multiple times, seems even more safe to me, so I am not sure what you mean by "seems not quite safe to me"?
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When enabling bluetooth after starting the app and trying to connect, the app crashes due to
mChatServicebeing null.This adds a listener to the bluetooth state and starts the bluetooth service when the user enables bluetooth.
I never did much in Android, so I hope implementing it this way is correct.