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How to make use logcat???
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gistfile1.txt
You need to use adb server.
1. Connect your android with your laptop/pc
2. Go to developer options and turn on the stay awake and USB debugging options. (Your phone)
3. In your terminal, type "sudo adb kill-server" and then "sudo adb start-server".
4. Type "adb devices" (this should give list of devices connected)
List of devices attached
you_device_name device
5. "cd" to your folder where you have made your build.
6. Type "buildozer android debug deploy run logcat > logcat.txt"
this saves the logs (for the entire process) in a file logcat.txtx in the same folder and also deploys you app on the phone.
Go through it and find your error.
7. keep your phone awake.(do not lock it).
@khoi1009
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khoi1009 commented Aug 9, 2017

Brief summary:
The app has 2 screens, 1 for user login and 1 for content display
Libraries: kivymd, sqlite3 and django

The apk crashed on startup with no specific error

Below is part of the log

Thanks

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

E/WiFiServiceImpl ( 1011): SAVE nid=0 uid=1000/0

D/WifiService( 1011): Connect with config* ID: -1 SSID: "Griffith University" BSSID: null FQDN: null REALM: null PRIO: 0

D/WifiService( 1011):  KeyMgmt: WPA_EAP IEEE8021X Protocols:

D/WifiService( 1011):  AuthAlgorithms:

D/WifiService( 1011):  PairwiseCiphers:

D/WifiService( 1011):  GroupCiphers:

D/WifiService( 1011):  PSK: 

D/WifiService( 1011):  sim_num 

D/WifiService( 1011): Enterprise config:

D/WifiService( 1011): password "vomap1016"

D/WifiService( 1011): identity "s2619138"

D/WifiService( 1011): eap PEAP

D/WifiService( 1011): proactive_key_caching 1

D/WifiService( 1011): IP config:

D/WifiService( 1011): IP assignment: UNASSIGNED

D/WifiService( 1011): Proxy settings: UNASSIGNED

D/WifiService( 1011):  uid=1000

D/WifiService( 1011): triggeredLow: 0 triggeredBad: 0 triggeredNotHigh: 0

D/WifiService( 1011): ticksLow: 0 ticksBad: 0 ticksNotHigh: 0

D/WifiService( 1011): triggeredJoin: 0

D/WifiService( 1011): autoJoinBailedDueToLowRssi: false

D/WifiService( 1011): autoJoinUseAggressiveJoinAttemptThreshold: 0

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/screensaver(29881): android.intent.action.BATTERY_CHANGED

I/screensaver(29881): status Full,level=100,scale=100,v=4385,USB

E/screensaver(29881): Fully charged (100%)

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

I/Ads     (24509): Ad is not visible. Not refreshing ad.

I/Ads     (24509): Scheduling ad refresh 60000 milliseconds from now.

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

E/WiFiServiceImpl ( 1011): SAVE nid=0 uid=1000/0

D/WifiService( 1011): Connect with config* ID: -1 SSID: "Griffith University" BSSID: null FQDN: null REALM: null PRIO: 0

D/WifiService( 1011):  KeyMgmt: WPA_EAP IEEE8021X Protocols:

D/WifiService( 1011):  AuthAlgorithms:

D/WifiService( 1011):  PairwiseCiphers:

D/WifiService( 1011):  GroupCiphers:

D/WifiService( 1011):  PSK: 

D/WifiService( 1011):  sim_num 

D/WifiService( 1011): Enterprise config:

D/WifiService( 1011): password "vomap1016"

D/WifiService( 1011): identity "s2619138"

D/WifiService( 1011): eap PEAP

D/WifiService( 1011): proactive_key_caching 1

D/WifiService( 1011): IP config:

D/WifiService( 1011): IP assignment: UNASSIGNED

D/WifiService( 1011): Proxy settings: UNASSIGNED

D/WifiService( 1011):  uid=1000

D/WifiService( 1011): triggeredLow: 0 triggeredBad: 0 triggeredNotHigh: 0

D/WifiService( 1011): ticksLow: 0 ticksBad: 0 ticksNotHigh: 0

D/WifiService( 1011): triggeredJoin: 0

D/WifiService( 1011): autoJoinBailedDueToLowRssi: false

D/WifiService( 1011): autoJoinUseAggressiveJoinAttemptThreshold: 0

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

E/ctxmgr  ( 2818): [BaseServerTask]Failed network request due to no network connectivity: expired

E/ctxmgr  ( 2818): [AccountAclCallback]Failed Acl fetch: network status=1

E/ctxmgr  ( 2818): [BaseServerTask]Failed network request due to no network connectivity: expired

E/ctxmgr  ( 2818): [BaseServerTask]Failed network request due to no network connectivity: expired

E/ctxmgr  ( 2818): [EventHandler]Didn't find runnable for alarm id=422, intent=Intent { act=CONTEXT_MANAGER_ALARM_WAKEUP_33364 flg=0x14 (has extras) }

E/ctxmgr  ( 2818): [DailyCheckinOperation]Failed daily get config: network status=1

E/ctxmgr  ( 2818): [AccountAclCallback]Failed Acl fetch: network status=1

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

I/PlayCommon(19783): [1121] com.google.android.play.a.g.e(222): Preparing logs for uploading

I/PlayCommon(19783): [1121] com.google.android.play.a.g.a(436): Connecting to server: https://play.googleapis.com/play/log?format=raw&proto_v2=true

D/DnsFallback(  426): query: play.googleapis.com

E/PlayCommon(19783): [1121] com.google.android.play.a.g.a(466): Failed to connect to server: java.net.UnknownHostException: Unable to resolve host "play.googleapis.com": No address associated with hostname

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

E/WiFiServiceImpl ( 1011): SAVE nid=0 uid=1000/0

D/WifiService( 1011): Connect with config* ID: -1 SSID: "Griffith University" BSSID: null FQDN: null REALM: null PRIO: 0

D/WifiService( 1011):  KeyMgmt: WPA_EAP IEEE8021X Protocols:

D/WifiService( 1011):  AuthAlgorithms:

D/WifiService( 1011):  PairwiseCiphers:

D/WifiService( 1011):  GroupCiphers:

D/WifiService( 1011):  PSK: 

D/WifiService( 1011):  sim_num 

D/WifiService( 1011): Enterprise config:

D/WifiService( 1011): password "vomap1016"

D/WifiService( 1011): identity "s2619138"

D/WifiService( 1011): eap PEAP

D/WifiService( 1011): proactive_key_caching 1

D/WifiService( 1011): IP config:

D/WifiService( 1011): IP assignment: UNASSIGNED

D/WifiService( 1011): Proxy settings: UNASSIGNED

D/WifiService( 1011):  uid=1000

D/WifiService( 1011): triggeredLow: 0 triggeredBad: 0 triggeredNotHigh: 0

D/WifiService( 1011): ticksLow: 0 ticksBad: 0 ticksNotHigh: 0

D/WifiService( 1011): triggeredJoin: 0

D/WifiService( 1011): autoJoinBailedDueToLowRssi: false

D/WifiService( 1011): autoJoinUseAggressiveJoinAttemptThreshold: 0

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

I/PlayCommon(19783): [1131] com.google.android.play.a.g.e(222): Preparing logs for uploading

I/PlayCommon(19783): [1131] com.google.android.play.a.g.e(226): No file ready to send

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

I/Ads     (24509): Ad is not visible. Not refreshing ad.

I/Ads     (24509): Scheduling ad refresh 60000 milliseconds from now.

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

I/PlayCommon(19783): [1093] com.google.android.play.a.g.e(222): Preparing logs for uploading

I/PlayCommon(19783): [1093] com.google.android.play.a.g.a(436): Connecting to server: https://play.googleapis.com/play/log?format=raw&proto_v2=true

D/DnsFallback(  426): query: play.googleapis.com

E/PlayCommon(19783): [1093] com.google.android.play.a.g.a(466): Failed to connect to server: java.net.UnknownHostException: Unable to resolve host "play.googleapis.com": No address associated with hostname

E/WiFiServiceImpl ( 1011): SAVE nid=0 uid=1000/0

D/WifiService( 1011): Connect with config* ID: -1 SSID: "Griffith University" BSSID: null FQDN: null REALM: null PRIO: 0

D/WifiService( 1011):  KeyMgmt: WPA_EAP IEEE8021X Protocols:

D/WifiService( 1011):  AuthAlgorithms:

D/WifiService( 1011):  PairwiseCiphers:

D/WifiService( 1011):  GroupCiphers:

D/WifiService( 1011):  PSK: 

D/WifiService( 1011):  sim_num 

D/WifiService( 1011): Enterprise config:

D/WifiService( 1011): password "vomap1016"

D/WifiService( 1011): identity "s2619138"

D/WifiService( 1011): eap PEAP

D/WifiService( 1011): proactive_key_caching 1

D/WifiService( 1011): IP config:

D/WifiService( 1011): IP assignment: UNASSIGNED

D/WifiService( 1011): Proxy settings: UNASSIGNED

D/WifiService( 1011):  uid=1000

D/WifiService( 1011): triggeredLow: 0 triggeredBad: 0 triggeredNotHigh: 0

D/WifiService( 1011): ticksLow: 0 ticksBad: 0 ticksNotHigh: 0

D/WifiService( 1011): triggeredJoin: 0

D/WifiService( 1011): autoJoinBailedDueToLowRssi: false

D/WifiService( 1011): autoJoinUseAggressiveJoinAttemptThreshold: 0

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

E/WiFiServiceImpl ( 1011): SAVE nid=0 uid=1000/0

D/WifiService( 1011): Connect with config* ID: -1 SSID: "Griffith University" BSSID: null FQDN: null REALM: null PRIO: 0

D/WifiService( 1011):  KeyMgmt: WPA_EAP IEEE8021X Protocols:

D/WifiService( 1011):  AuthAlgorithms:

D/WifiService( 1011):  PairwiseCiphers:

D/WifiService( 1011):  GroupCiphers:

D/WifiService( 1011):  PSK: 

D/WifiService( 1011):  sim_num 

D/WifiService( 1011): Enterprise config:

D/WifiService( 1011): password "vomap1016"

D/WifiService( 1011): identity "s2619138"

D/WifiService( 1011): eap PEAP

D/WifiService( 1011): proactive_key_caching 1

D/WifiService( 1011): IP config:

D/WifiService( 1011): IP assignment: UNASSIGNED

D/WifiService( 1011): Proxy settings: UNASSIGNED

D/WifiService( 1011):  uid=1000

D/WifiService( 1011): triggeredLow: 0 triggeredBad: 0 triggeredNotHigh: 0

D/WifiService( 1011): ticksLow: 0 ticksBad: 0 ticksNotHigh: 0

D/WifiService( 1011): triggeredJoin: 0

D/WifiService( 1011): autoJoinBailedDueToLowRssi: false

D/WifiService( 1011): autoJoinUseAggressiveJoinAttemptThreshold: 0

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

I/Ads     (24509): Ad is not visible. Not refreshing ad.

I/Ads     (24509): Scheduling ad refresh 60000 milliseconds from now.

D/ss_launch:ss4Fragment(29881): ss4 update charge card

D/O2OStats:( 3228): net status cannot allow to send data!

D/ss_launch:ss4Fragment(29881): ss4 update charge card

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