The app crashes after logging into the "Write Notes" page and trying to return to the dashboard page using the back icon.

[ahyar92]

Expected behavior

when I go to the "Write a note" page and want to return to the dashboard page using the back icon, the app does not cause crashes.

Actual behavior

At first I tried to go to the "Write a note" page and make a note, but when I went back to the dashboard without storing the record using the back icon, the application suddenly crashed.

How to reproduce

1. Install and open the app
2. Next click Pencil Icon to write the note
3. Once you are on the Write Notes page, click back icon to return to the dashboard page. Then you will find the crash as I experienced.

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Environment

Tested on with devices:

Device	Android Version
Xiaomi Redmi Note 5A	Nougat, 7.1.2 N2G47H (RAM : 2 GB)

Application Version: 3.1.3

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Recording Of The Bug

https://www.youtube.com/watch?v=n6kveH8dqug&feature=youtu.be

Logcat

06-02 02:18:34.714  6482  6482 E AndroidRuntime: FATAL EXCEPTION: main
06-02 02:18:34.714  6482  6482 E AndroidRuntime: Process: org.kore.kolabnotes.android, PID: 6482
06-02 02:18:34.714  6482  6482 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String jp.wasabeef.richeditor.RichEditor.getHtml()' on a null object reference
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at org.kore.kolabnotes.android.fragment.DetailFragment.onBackPressed(DetailFragment.java:1493)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at org.kore.kolabnotes.android.fragment.DetailFragment$1.onClick(DetailFragment.java:200)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at android.view.View.performClick(View.java:5647)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at android.view.View$PerformClick.run(View.java:22462)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at android.os.Handler.handleCallback(Handler.java:754)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:95)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:163)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:6361)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
06-02 02:18:34.714  6482  6482 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)