A NullPointerException bug

[tingsu]

Hi, thanks for developing this useful app. We recently tested this app by an automated Android GUI testing tool developed by our research team. We found the app could run into a "NullPointerException" error after executing the following actions:

start the app -> press "menu" key -> choose the "open" menu item -> delete the original file name "/sdcard/" in the EditText on the appearing dialog titled with "Open File" -> fill in "test" in the EditText -> click "open" -> click "continue" button on the appearing dialog titled with "test not found" -> the app crashed

Here is the log:

W/dalvikvm( 1076): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
E/AndroidRuntime( 1076): FATAL EXCEPTION: main
E/AndroidRuntime( 1076): java.lang.NullPointerException
E/AndroidRuntime( 1076): at org.paulmach.textedit.pmTextEdit.onPrepareDialog(pmTextEdit.java:951)
E/AndroidRuntime( 1076): at android.app.Activity.onPrepareDialog(Activity.java:2988)
E/AndroidRuntime( 1076): at android.app.Activity.showDialog(Activity.java:3051)
E/AndroidRuntime( 1076): at android.app.Activity.showDialog(Activity.java:3002)
E/AndroidRuntime( 1076): at org.paulmach.textedit.pmTextEdit$15.onClick(pmTextEdit.java:1329)
E/AndroidRuntime( 1076): at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166)
E/AndroidRuntime( 1076): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 1076): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 1076): at android.app.ActivityThread.main(ActivityThread.java:4745)
E/AndroidRuntime( 1076): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 1076): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 1076): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
E/AndroidRuntime( 1076): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
E/AndroidRuntime( 1076): at dalvik.system.NativeStart.main(Native Method)
W/ActivityManager( 150): Force finishing activity org.paulmach.textedit/.pmTextEdit

We carefully inspected the source code, and found the root cause lies in the following code (in "pmTextEdit.java" file)

Could you please take a look and confirm this bug? Thanks!
Ting Su

[tingsu]

Some updates: we have sent an email to the app author, and the bug has been confirmed.