When i go from screen 1 to screen 2 my app crashes

MIT App Inventor Help
55

there is a phone number picker & the user selects the no. from ther & the numbers which are selected are saved in the labels

56

I think it's time for me to take a look at your project to find the source of the crash

57

ya if you can then pls.. you r most wlcm to this....
i will be sharing the aia file soon
thanks

58

OK, probably take me a while :upside_down_face:

59

I took a quick look at your aia and think its the Navigation comp.:

grafik
grafik1663×673 269 KB

Post the blocks where set the properties.

1 Like
60

If I remove the Navigation comp., the app doesn't crash.

1 Like
61

ok thank you Anke :slightly_smiling_face:

62

If I insert this block, I don't see this:

grafik

so this block was not used and the Navigation is useless.
So if you do not need it, remove it. Otherwise set the correct properties.

1 Like
63

ok thank you :slightly_smiling_face:

64

This thing solved my problem... now my app does not crash even with multiple screens.. but still the spinner & the SOS issues have got no solution
i am really thankful to everyone who have helped me solve
thank you:- @Anke , @ChrisWard , @Italo , @TIMAI2 , @Taifun , @SteveJG & @vknow360
every bit of your help means a lot
:relaxed:

2 Likes
65

Hi Neelam

There are several reasons why the SOS messages can fail:

  1. It takes time for Location to be established (30 - 60 seconds).
  2. A Location Change must have occurred after Location is initially found.
  3. Depends on the accuracy of the sensor, how well the region is covered by GPS, how accurate Google Maps are for the region.
  4. The messages must be sent with a short time interval between each (2-3 seconds)
  5. With all of this setup, results are better, but in my tests still unreliable - though my region has poor GPS.

Given all of that, I have put together a stand-alone SOS Button App as an example for you to test, tweak and butcher (as an APK) :hammer_and_wrench:

SOS_BUTTON.aia (13.6 KB)

66

My colleague SteveJG should be mentioned as he pointed out the reasons why Location can fail. He has written an in-depth tutorial on the Location Sensor:
https://docs.google.com/document/d/1V1Zm5cYoa12KVb_cTlfelSfyUkW7IH2WPHUoTa02XaY/pub

67

thanks @ChrisWard i will surely see to it

68

thanks for this too :+1:

69

your app doesn't work on aia companion so i decided to see if it works when installed... it can't even get installed

image
image540×1080 42.9 KB

thanks

70

and yes on aia companion it only saves my name when i click on save not the names of contact & the no.s & your app shows IO error too

71

Which is why, amongst other reasons, I stated that it must be tested as an APK :upside_down_face:

Tested and working here.

72

How are you installing. The method I use is to Build App (provide QR code for APK). Installed on a Samsung s8.

73

mine is Redmi Note 5
its not getting installed there

74

It should show a warning that the App might harm your device (standard Google warning), which of course you tap through......

  1. Do you have your Redmi set for development?
  2. What Android version is it?