Apache Cordova app issues

Here I am sharing all the issues/errors which I get during Cordova mobile app development-

1-Call to undefined method mysqli_stmt::get_result

Solution: https://stackoverflow.com/questions/8321096/call-to-undefined-method-mysqli-stmtget-result

cpanel dispable mysqli and enable nd_mysqli

2- Server origin access issue  (Unable to access API hosted on server)

   v1=> .htaccess => added following lines

<IfModule mod_headers.c>

    Header set Access-Control-Allow-Origin "*"

</IfModule>

3- Emulator : net not working. 

   First change DNS to 8.8.8.8 of the computer where avd running.

   Now open android studio=> tools=>AVD manager=> select drop down arrow of the AVD(Emulator)=> click on "Cold Boot Now"

4- Add platform: cordova platform add android

                 cordova platform rm android

cordova platform add browser

5- Run app into emulator:

cordova build --emulator

cordova run android --emulator

To run in mobile-> cordova run or cordova run android

To browser  cordova run browser

6- Biggest Issue: 

i) Why am I seeing net::ERR_CLEARTEXT_NOT_PERMITTED errors in cordova 8/9.....?

        ii) was unable to call API using jquery ajax : Error was cordova app ajax api call returning xhr.status 0

Solution: go to config.xml

<widget id="com.my.awesomeapp" version="1.0.0" xmlns="http://www.w3.org/ns/widgets"

xmlns:android="http://schemas.android.com/apk/res/android" xmlns:cdv="http://cordova.apache.org/ns/1.0">

this line already in config.xml but here you can see xmln:android  not there so just copy xmlns:android="http://schemas.android.com/apk/res/android" 

and past it there.

now past below <edit-config....>....</edit-config> into <plateform name="android"> ..../<platform> section.

<platform name="android">

  <edit-config file="app/src/main/AndroidManifest.xml" mode="merge" target="/manifest/application">

      <application android:usesCleartextTraffic="true" />

  </edit-config>

</platform>

for more details please check https://stackoverflow.com/questions/54752716/why-am-i-seeing-neterr-cleartext-not-permitted-errors-after-upgrading-to-cordo

7- Issue : if you want to use <script> in .html file then need to add follwoing

 <meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' http://* 'unsafe-inline'; script-src 'self' http://* 'unsafe-inline' 'unsafe-eval'" />

How to analyze windows event log

 

Open windows event viewer-

1- Open Control Panel.

2- Click on Administrative Tools.

3- Now open Event Viewer.

In the console tree, expand Windows Logs, and then click System. The results pane lists individual system events.

Now before proceeding further we should know the event id of the event which we want to analyze. here we want to check system shut down, reboot, start etct so event id is given below-

Event ID 41: The system rebooted without cleanly shutting down first. This error occurs when the system stopped responding, crashed, or lost power unexpectedly.

Event ID 1074: Indicates that the shut down process was initiated by an app or user, or when a user initiates a restart or shutdown. Your computer records this event when an application forces your laptop to shut down or restart. This event also helps you know when a user restarted or shut down the computer from the Start menu or by using CTRL+ALT+DEL.

Event ID 6006 - The clean shut down event. This means Windows 10 was turned off correctly.  It gives the message, “The Event log service was stopped.”

Event ID 6008 - Indicates a dirty/improper shutdown. Appears in the log when the previous shutdown was unexpected, e.g. due to power loss or BSoD (Bug check).you  will see this event in your system log. It gives the message, “The previous system shutdown at time on date was unexpected.”

After this, we can find the particular event by Option "Filter Current logs" in the right side action tab and you can see all the logs with time for that particular event. 

If you want to see more details about a specific event, in the results pane, click the event.