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Editorial Team
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Asked: 2026-06-13T11:54:46+00:00

At the beginnig all worked ok, but after i have deleted the database by

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At the beginnig all worked ok, but after i have deleted the database by command:

this.deleteDatabase("databasename");

and then my command:

databasehelper.getWritableDatabase();

started to throw exeptions

10-28 23:39:29.190: D/AndroidRuntime(15363): Shutting down VM
10-28 23:39:29.190: W/dalvikvm(15363): threadid=1: thread exiting with uncaught exception (group=0x40b5b300)
10-28 23:39:29.190: E/AndroidRuntime(15363): FATAL EXCEPTION: main
10-28 23:39:29.190: E/AndroidRuntime(15363): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.package/com.package.MainActivity}: java.lang.ArrayIndexOutOfBoundsException: length=50; index=50
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.os.Handler.dispatchMessage(Handler.java:99)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.os.Looper.loop(Looper.java:137)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.app.ActivityThread.main(ActivityThread.java:4745)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at java.lang.reflect.Method.invokeNative(Native Method)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at java.lang.reflect.Method.invoke(Method.java:511)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at dalvik.system.NativeStart.main(Native Method)
10-28 23:39:29.190: E/AndroidRuntime(15363): Caused by: java.lang.ArrayIndexOutOfBoundsException: length=50; index=50
10-28 23:39:29.190: E/AndroidRuntime(15363):    at com.package.DBHelper.onCreate(DBHelper.java:41)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:252)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at com.package.MainActivity.onCreate(MainActivity.java:28)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.app.Activity.performCreate(Activity.java:5008)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
10-28 23:39:29.190: E/AndroidRuntime(15363):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
10-28 23:39:29.190: E/AndroidRuntime(15363):    ... 11 more

What should i do now?

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1 Answer

  1. Editorial Team

    You should learn how to read stack traces, because they are an unvaluable feature of modern languages. Your Activity can’t be started because you try to access the element at index 50 in an array which has 50 elements, and thus allows indices between 0 and 49:

    java.lang.ArrayIndexOutOfBoundsException: length=50; index=50

    this is located in the onCreate() method of com.package.DBHelper, at line 41

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