app crash after taking permission from user in android

[Degenerate Tech]

i have written kivy app it working well in android ..but when i have added two lines below 

from android.permissions import request_permissions, Permission 

request_permissions([Permission.WRITE_EXTERNAL_STORAGE])

app in android crashing .please help

[Anoop Rana]

Yup the same issue i faced two years back.The solution would be  like just add this in your main loop

        from android.permissions import request_permissions, Permission
        request_permissions([Permission.READ_EXTERNAL_STORAGE, Permission.WRITE_EXTERNAL_STORAGE])

Note: Also make sure to give the permission in .spec file also.Then only it will work.

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[Degenerate Tech]

main loop mean where ?

within build method ?

On Monday, November 2, 2020 at 8:54:16 PM UTC+5:30, Anoop Rana wrote:

Yup the same issue i faced two years back.The solution would be  like just add this in your main loop

        from android.permissions import request_permissions, Permission
        request_permissions([Permission.READ_EXTERNAL_STORAGE, Permission.WRITE_EXTERNAL_STORAGE])

Note: Also make sure to give the permission in .spec file also.Then only it will work.

On Mon, Nov 2, 2020 at 8:50 PM Degenerate Tech <sksah...@gmail.com> wrote:

i have written kivy app it working well in android ..but when i have added two lines below 

from android.permissions import request_permissions, Permission 

request_permissions([Permission.WRITE_EXTERNAL_STORAGE])

app in android crashing .please help

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[Degenerate Tech]

hey ..thanks now it is working

[Anoop Rana]

Where your app starts.At the very top .

.

Basically you can put it inside your own custom function and whenever you call that function it fill pop up a permission dialog asking for permission.So you can put this wherever you want permission.

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[Anoop Rana]

You're welcome :)

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[Degenerate Tech]

######sir it is taking storage permission from user but not taking WRITE_SETTINGS using this i want to change brightness 

class MyApp(App):

def build(self):

try:

from android.permissions import request_permissions, Permission

request_permissions([Permission.WRITE_EXTERNAL_STORAGE,Permission.WRITE_SETTINGS])

except Exception as e:

print(e)

a=GridLayout(cols=2)

a.add_widget(Video_play(self))

#a.add_widget(Video_play(self))

return a

You're welcome :)

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[Anoop Rana]

I think you can use Plyer to change/control android's properties like brightness,vibration etc.

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[Degenerate Tech]

yes i have use plyer ...but it need WRITE_SETTINGS

i have put in buildozer.spec ..after installing app brightness not changing ..when i have enabled system settings to yes for this app ..manually then it is working 

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[Anoop Rana]

You can check if vibration works by giving the app permission by the dialog that we set up.That way we will know if this is not working for only brightness or for both brightness & vibration.

Also can you tell me what changes did you make in your .spec file so that i can tell if something is missing.

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[Degenerate Tech]

#####some modification need

https://github.com/kivy/plyer/issues/383

Yes, now there is now problem and no "import plyer" error when running on my android device. However, it seems that my Android 6.0.1 does not accept WRITE_SETTINGS permission so easily. The app crashes as soon as trying to use brightness.set_level() or brightness.current_level() in the example. No problem if I comment out the lines using those.

I found on the Web the following:

"To use WRITE_SETTINGS, based on the docs:

Have the element in the manifest as normal.
Call Settings.System.canWrite() to see if you are eligible to write out settings.
If canWrite() returns false, start up the ACTION_MANAGE_WRITE_SETTINGS activity so the user can agree there to allow your app to actually write to settings."

How can this be implemented in Kivy?

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[Degenerate Tech]

i don't know java android ...please help 

[Anoop Rana]

Can you show the contents of the .spec file? 

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[Degenerate Tech]

# (list) Permissions

android.permissions = WRITE_SETTINGS,WRITE_EXTERNAL_STORAGE,READ_EXTERNAL_STORAGE

# (int) Target Android API, should be as high as possible.

android.api = 29

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[Anoop Rana]

This looks about right.So the problem is as you said that your android does not allow write permission so easily.As you mentioned,the docs say that you have to first start the said activity and then proceed.

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[Degenerate Tech]

####can you modify this code ?see yellow portion

from jnius import autoclass
from plyer.facades import Brightness
from android import mActivity

System = autoclass('android.provider.Settings$System')


class AndroidBrightness(Brightness):

    def _current_level(self):

        System.putInt(
            mActivity.getContentResolver(),
            System.SCREEN_BRIGHTNESS_MODE,
            System.SCREEN_BRIGHTNESS_MODE_MANUAL)
        cr_level = System.getInt(
            mActivity.getContentResolver(),
            System.SCREEN_BRIGHTNESS)
        return (cr_level / 255.) * 100

    def _set_level(self, level):
        System.putInt(
            mActivity.getContentResolver(),
            System.SCREEN_BRIGHTNESS,
            (level / 100.) * 255)


def instance():
    return AndroidBrightness()

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