android - App force closes when returned back from the second activity to the first, the first activity no more works, has to be restarted again

I'm designing an application that allows the user to retrieve his data from the server, I'm furnishing this using two different activities, the first one receives the username as a text input and the second one displays the user's data based on the username. I'm using JSON schema for storing and retrieving the data. The app works fine for the first time but when I logout from the second screen using finish() and try to re-enter a new username in the first screen "the app force closes". This has been giving me sleepless nights, want to be overwhelmed with your support.

12-04 16:28:35.289: D/dalvikvm(553): GC_FOR_ALLOC freed 64K, 4% free 6893K/7171K, paused 64ms
12-04 16:28:35.299: I/dalvikvm-heap(553): Grow heap (frag case) to 7.757MB for 1000016-byte allocation

12-04 16:28:35.399: D/dalvikvm(553): GC_CONCURRENT freed 1K, 5% free 7868K/8199K, paused 16ms+3ms
12-04 16:28:35.529: D/dalvikvm(553): GC_FOR_ALLOC freed <1K, 5% free 7869K/8199K, paused 31ms
12-04 16:28:35.539: I/dalvikvm-heap(553): Grow heap (frag case) to 8.180MB for 443572-byte allocation
12-04 16:28:35.589: D/dalvikvm(553): GC_CONCURRENT freed 0K, 4% free 8302K/8647K, paused 3ms+5ms
12-04 16:28:35.889: D/gralloc_goldfish(553): Emulator without GPU emulation detected.
12-04 16:29:16.819: D/dalvikvm(553): GC_FOR_ALLOC freed 1079K, 14% free 7509K/8711K, paused 221ms
12-04 16:29:16.829: I/dalvikvm-heap(553): Grow heap (frag case) to 8.360MB for 1000016-byte allocation
12-04 16:29:16.889: D/dalvikvm(553): GC_CONCURRENT freed 2K, 3% free 8483K/8711K, paused 4ms+4ms
12-04 16:29:17.229: D/dalvikvm(553): GC_CONCURRENT freed 1016K, 13% free 7979K/9159K, paused 3ms+11ms
12-04 16:29:18.149: E/log_tag(553): Error parsing data org.json.JSONException: No value for Alert

12-04 16:29:20.949: D/dalvikvm(553): GC_CONCURRENT freed 274K, 12% free 8090K/9159K, paused 6ms+5ms
12-04 16:29:26.259: E/log_tag(553): Error parsing data org.json.JSONException: No value for Alert
12-04 16:29:26.859: D/AndroidRuntime(553): Shutting down VM
12-04 16:29:26.859: W/dalvikvm(553): threadid=1: thread exiting with uncaught exception (group=0x409951f8)
12-04 16:29:26.929: E/AndroidRuntime(553): FATAL EXCEPTION: main
12-04 16:29:26.929: E/AndroidRuntime(553): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bombil.kustomizer/com.bombil.kustomizer.Menus}: java.lang.IndexOutOfBoundsException: Invalid index 2, size is 2
12-04 16:29:26.929: E/AndroidRuntime(553): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
12-04 16:29:26.929: E/AndroidRuntime(553): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
12-04 16:29:26.929: E/AndroidRuntime(553): at android.app.ActivityThread.access$600(ActivityThread.java:122)
12-04 16:29:26.929: E/AndroidRuntime(553): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)

12-04 16:29:26.929: E/AndroidRuntime(553): at android.os.Handler.dispatchMessage(Handler.java:99)
12-04 16:29:26.929: E/AndroidRuntime(553): at android.os.Looper.loop(Looper.java:137)
12-04 16:29:26.929: E/AndroidRuntime(553): at android.app.ActivityThread.main(ActivityThread.java:4340)
12-04 16:29:26.929: E/AndroidRuntime(553): at java.lang.reflect.Method.invokeNative(Native Method)
12-04 16:29:26.929: E/AndroidRuntime(553): at java.lang.reflect.Method.invoke(Method.java:511)
12-04 16:29:26.929: E/AndroidRuntime(553): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
12-04 16:29:26.929: E/AndroidRuntime(553): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
12-04 16:29:26.929: E/AndroidRuntime(553): at dalvik.system.NativeStart.main(Native Method)
12-04 16:29:26.929: E/AndroidRuntime(553): Caused by: java.lang.IndexOutOfBoundsException: Invalid index 2, size is 2
12-04 16:29:26.929: E/AndroidRuntime(553): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)

12-04 16:29:26.929: E/AndroidRuntime(553): at java.util.ArrayList.get(ArrayList.java:304)
12-04 16:29:26.929: E/AndroidRuntime(553): at com.bombil.kustomizer.Menus.AddEditText(Menus.java:309)
12-04 16:29:26.929: E/AndroidRuntime(553): at com.bombil.kustomizer.Menus.AddInsertView(Menus.java:121)
12-04 16:29:26.929: E/AndroidRuntime(553): at com.bombil.kustomizer.Menus.onCreate(Menus.java:88)
12-04 16:29:26.929: E/AndroidRuntime(553): at android.app.Activity.performCreate(Activity.java:4465)
12-04 16:29:26.929: E/AndroidRuntime(553): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
12-04 16:29:26.929: E/AndroidRuntime(553): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
12-04 16:29:26.929: E/AndroidRuntime(553): ... 11 more
12-04 16:29:27.009: D/dalvikvm(553): GC_CONCURRENT freed 273K, 10% free 8248K/9159K, paused 4ms+6ms
12-04 16:32:56.799: I/Process(553): Sending signal. PID: 553 SIG: 9

Answer

Apparently, you're trying to access an object in an ArrayList at in your Menus.java file at line 309. You're trying to access the object with the index of 2, but the total ArrayList size is only 2, meaning the highest index would be 1. This causes an IndexOutOfBounds exception as shown here:

    ComponentInfo{com.bombil.kustomizer/com.bombil.kustomizer.Menus}:
 java.lang.IndexOutOfBoundsException: Invalid index 2, size is 2

E/AndroidRuntime(553): at com.bombil.kustomizer.Menus.AddEditText(Menus.java:309)