Hi Justin, thanks. I'm now trying to connect to a webservice, and for that I need to import java.rmi.RemoteException. But the Android Eclipse plugin is not letting me do that. It is giving the error message: 'The import java.rmi.RemoteException cannot be resolved'. Is it because Android doesn't support this library. What could be the solution for this ?
-umar On Apr 24, 4:47 pm, "Justin (Google Employee)" <[EMAIL PROTECTED]> wrote: > Try searching this forum for "mysql" > (http://groups.google.com/group/android-developers/search?group=androi... > ) or "jdbc" > (http://groups.google.com/group/android-developers/search?group=androi... > ) . > > The short answer, however, is that you can't or maybe you can, but > it'll be incredibly difficult. Android doesn't have support for > arbitrary third-party libraries because they may rely on Java > libraries we don't support. Remember, Android does *not* run Java > bytecode, despite the fact that code for Android is written in the > Java language. > > The slightly longer answer to this question is that you don't want to > do this anyway. JDBC was not a communications protocol that was > designed to run over unreliable, high latency, low bandwidth data > connections like most cellular devices will have. Using JDBC is most > likely going to lead to a horrible experience for users. What is a > better idea is to expose your data via an HTTP-based interface. HTTP > was built to handle the communications environment that Android > devices are most likely to live in. > > Cheers, > Justin > Android Team @ Google > > On Apr 23, 12:37 am, scimitar <[EMAIL PROTECTED]> wrote: > > > Hi, > > > I'm trying to connect to an external mysql database. The code is > > something like: > > > try > > > > { > > > Class.forName(DBCLASS).newInstance(); > > > } > > > catch (Exception e) > > > { > > > Log.i("DataLayer", "unable to load jdbc driver"); > > > } > > > // Connect to the database > > > // > > > jdbc:mysql://[hostname][,failoverhost...][:port]/[dbname][?param1=value1][¶m2=value2]..... > > > > try > > > { > > > connection = DriverManager.getConnection( > > > DBCONNSTRING + DBHOST + "/" + DBNAME + "?user=" + USER + > > > "&password=" + PASSWORD); > > > > } > > > catch (Exception e) > > > { > > > > } > > > Basically the 'DriverManager.getConnection()' call fails. The error > > messages are: > > > D/dalvikvm( 596): Exception Ljava/lang/ClassNotFoundException; from > > > > PathClassLoader.java:205 not caught locally > > > D/dalvikvm( 596): NOTE: loadClass 'java.sql.NClob' 0x40069968 threw > > > an exception > > > D/dalvikvm( 596): Exception Ljava/lang/ClassNotFoundException; from > > > PathClassLoader.java:205 not caught locally > > > D/dalvikvm( 596): NOTE: loadClass > > > 'com.mysql.jdbc.LocalizedErrorMessages_en_US' 0x40069968 threw an > > > exception > > > D/dalvikvm( 596): Exception Ljava/lang/ClassNotFoundException; from > > > PathClassLoader.java:205 not caught locally > > > D/dalvikvm( 596): NOTE: loadClass > > > 'com.mysql.jdbc.LocalizedErrorMessages_en' 0x40069968 threw an exception > > > I/dalvikvm-heap( 596): GC! (75 sec since last GC) > > > I/dalvikvm-heap( 596): GC old usage 90.6%; now 0.985MB used / 1.971MB > > > soft max (2.062MB real max) > > > I/dalvikvm-heap( 596): GC freed 1736 objects / 106824 bytes in 56ms > > > D/dalvikvm( 596): Exception Ljava/lang/ClassNotFoundException; from > > > PathClassLoader.java:205 not caught locally > > > D/dalvikvm( 596): NOTE: loadClass > > > 'com.mysql.jdbc.LocalizedErrorMessages' 0x40069968 threw an exception > > > D/dalvikvm( 596): Exception Ljava/lang/ClassNotFoundException; from > > > PathClassLoader.java:205 not caught locally > > > D/dalvikvm( 596): NOTE: loadClass > > > 'com.mysql.jdbc.LocalizedErrorMessages_en_US' 0x40018950 threw an > > > exception > > > D/dalvikvm( 596): Exception Ljava/lang/ClassNotFoundException; from > > > PathClassLoader.java:205 not caught locally > > > D/dalvikvm( 596): NOTE: loadClass > > > 'com.mysql.jdbc.LocalizedErrorMessages_en' 0x40018950 threw an exception > > > D/dalvikvm( 596): Exception Ljava/lang/ClassNotFoundException; from > > > PathClassLoader.java:205 not caught locally > > > D/dalvikvm( 596): NOTE: loadClass > > > 'com.mysql.jdbc.LocalizedErrorMessages' 0x40018950 threw an exception > > > D/dalvikvm( 596): Exception Ljava/lang/RuntimeException; from > > > Messages.java:68 not caught locally > > > W/dalvikvm( 596): Exception Ljava/lang/RuntimeException; thrown > > > during Lcom/mysql/jdbc/Messages;.<clinit> > > > D/dalvikvm( 596): Exception Ljava/lang/ExceptionInInitializerError; > > > from Util.java:350 not caught locally > > > W/dalvikvm( 596): Exception Ljava/lang/ExceptionInInitializerError; > > > thrown during Lcom/mysql/jdbc/Util;.<clinit> > > > D/dalvikvm( 596): Exception Ljava/lang/ExceptionInInitializerError; > > > from ViewRoot.java:964 not caught locally > > > D/dalvikvm( 596): Exception Ljava/lang/ExceptionInInitializerError; > > > from ZygoteInit.java:1555 not caught locally > > > I would really appreciate if somebody could help me. > > > thanks. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. 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