App crash

Question

I have one flex mobile application (however I'm not sure if this is not an Adobe AIR for Android bug)
It works fine on Android without "word prediction activated" and also with "word prediction activated" an a device with 240 DPI however my application is designed to work on a 120 DPI device and with word prediction activated and on this scenario, the app crash while typing text on a TextInput.
Steps to reproduce:
1. Type Luiz153
2. Remove "z" to get Lui153
3. Type "o" in the old "z" place to get Luio153
At this moment the app just crash with the following android stack trace log:
java.lang.StringIndexOutOfBoundsException: length=5; regionStart=-2; regionLength=7
at java.lang.String.startEndAndLength(String.java:588)
at java.lang.String.substring(String.java:1475)
at java.lang.String.subSequence(String.java:1862)
at com.adobe.air.AndroidInputConnection.setComposingRegion(AndroidInputConnection.java:183)
at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper. java:342)
at com.android.internal.view.IInputConnectionWrapper$MyHandler.handleMessage(IInputConnectio nWrapper.java:77)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
Aditional info: If I change the TextInput skin class from spark.skins.mobile.TextInputSkin to standard desktop TextInputSkin, this issue don't occurs but of course I will get a lot of issues because it's not optimized for mobile so I believe that this issue is related with the flex mobile TextInputSkin).

Answer 1

For us the problem can be reproduced as follows:
1. Have a flash.text.TextField with maxChars set to some value
2. Have Google keyboard installed Google Keyboard - Android Apps on Google Play
3. Enter text that in length reaches maxChars. Continue typing using the predicted typing. No visible letters will appear, but that's ok.
4. Then press and hold backspace on the keyboard
5. See that app crashes.
Happens both, when IME is in full screen or in non full screen mode.
Tested on Adobe AIR 15, Sansubg Galaxty S3, Samsung Galaxy S5.