android - Error in accessing sqlite database - 


public class dbopener {  private static string db_path = "/data/data/com.edu.tp.iit.mns/databases/"; // path                                                                             // of                                                                             // our                                                                             // database private static string db_name = "finals"; // database name private final context mycontext; private sqlitedatabase db;  public dbopener(context context) {     mycontext = context; }  public void open() {     boolean dbexists = checkdatabase();     if (!dbexists) {         try {             copydatabase();         } catch (ioexception e) {             throw new runtimeexception("something bad!!!");         }     }     string path = db_path + db_name;     db = sqlitedatabase.opendatabase(path, null,             sqlitedatabase.open_readwrite); }  private boolean checkdatabase() {     sqlitedatabase checkdb = null;     try {         // try opening database         string path = db_path + db_name;         checkdb = sqlitedatabase.opendatabase(path, null,                 sqlitedatabase.open_readonly);     } catch (sqliteexception e) {         throw new runtimeexception("something bad111111!!!");     }     if (checkdb != null)         checkdb.close(); // close db; don’t need     return checkdb != null; }

my error log file:

  06-04 14:00:38.756: e/database(306): sqlite3_open_v2("/data/data/com.edu.tp.iit.mns/databases/finals", &handle, 1, null) failed   06-04 14:00:38.836: e/androidruntime(306): fatal exception: main   06-04 14:00:38.836: e/androidruntime(306): java.lang.runtimeexception: unable resume activity {com.edu.tp.iit.mns/com.edu.tp.iit.mns.lunch}: java.lang.runtimeexception: bad111111!!!   06-04 14:00:38.836: e/androidruntime(306):    @ android.app.activitythread.performresumeactivity(activitythread.java:3128)   06-04 14:00:38.836: e/androidruntime(306):    @ android.app.activitythread.handleresumeactivity(activitythread.java:3143)   06-04 14:00:38.836: e/androidruntime(306):    @ android.app.activitythread.handlelaunchactivity(activitythread.java:2684)   06-04 14:00:38.836: e/androidruntime(306):    @ android.app.activitythread.access$2300(activitythread.java:125)   06-04 14:00:38.836: e/androidruntime(306):    @ android.app.activitythread$h.handlemessage(activitythread.java:2033)   06-04 14:00:38.836: e/androidruntime(306):    @ android.os.handler.dispatchmessage(handler.java:99)   06-04 14:00:38.836: e/androidruntime(306):    @ android.os.looper.loop(looper.java:123)   06-04 14:00:38.836: e/androidruntime(306):    @ android.app.activitythread.main(activitythread.java:4627)   06-04 14:00:38.836: e/androidruntime(306):    @ java.lang.reflect.method.invokenative(native method)   06-04 14:00:38.836: e/androidruntime(306):    @ java.lang.reflect.method.invoke(method.java:521)   06-04 14:00:38.836: e/androidruntime(306):    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:868)   06-04 14:00:38.836: e/androidruntime(306):    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:626)   06-04 14:00:38.836: e/androidruntime(306):    @ dalvik.system.nativestart.main(native method)   06-04 14:00:38.836: e/androidruntime(306): caused by: java.lang.runtimeexception: bad111111!!!   06-04 14:00:38.836: e/androidruntime(306):    @ com.edu.tp.iit.mns.dbopener.checkdatabase(dbopener.java:50)   06-04 14:00:38.836: e/androidruntime(306):    @ com.edu.tp.iit.mns.dbopener.open(dbopener.java:29)   06-04 14:00:38.836: e/androidruntime(306):    @ com.edu.tp.iit.mns.lunch.onresume(lunch.java:49)   06-04 14:00:38.836: e/androidruntime(306):    @ android.app.instrumentation.callactivityonresume(instrumentation.java:1149)   06-04 14:00:38.836: e/androidruntime(306):    @ android.app.activity.performresume(activity.java:3823)   06-04 14:00:38.836: e/androidruntime(306):    @ android.app.activitythread.performresumeactivity(activitythread.java:3118)   06-04 14:00:38.836: e/androidruntime(306):    ... 12 more

my program running fine till deleted database assets folder , data/data/ databases folder , put new database file. cannot continue code because of error. help?

modify method checkdatabase() this:

private boolean checkdatabase() {     file dbfile = new file(db_path + db_name);     return dbfile.exists(); }

see this link reference.


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