Android 4.0上的PostgreSQL JDBC连接失败

概述有谁知道我可以做些什么来使JDBC连接在 Android 4.0上运行.它在Android 1.6-2.3上运行良好.我使用Dave Cramer的版本： http://groups.google.com/group/pgandroid/browse_thread/thread/d8b400f039f66d5f/f77b2e2a99370a36?lnk=raot#f77b2e2a99370a36 有谁知道我可以做些什么来使JDBC连接在 Android 4.0上运行.它在AndroID 1.6-2.3上运行良好.我使用Dave Cramer的版本：
http://groups.google.com/group/pgandroid/browse_thread/thread/d8b400f039f66d5f/f77b2e2a99370a36?lnk=raot#f77b2e2a99370a36

Logcat说：

06-10 17:35:51.043: E/AndroIDRuntime(798): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.belonogov.connectjdbc/com.belonogov.connectjdbc.ConnectJDBCActivity}: java.lang.NullPointerException06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:1956)06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.app.ActivityThread.access0(ActivityThread.java:123)06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.os.Handler.dispatchMessage(Handler.java:99)06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.os.Looper.loop(Looper.java:137)06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.app.ActivityThread.main(ActivityThread.java:4424)06-10 17:35:51.043: E/AndroIDRuntime(798):  at java.lang.reflect.Method.invokeNative(Native Method)06-10 17:35:51.043: E/AndroIDRuntime(798):  at java.lang.reflect.Method.invoke(Method.java:511)06-10 17:35:51.043: E/AndroIDRuntime(798):  at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)06-10 17:35:51.043: E/AndroIDRuntime(798):  at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:551)06-10 17:35:51.043: E/AndroIDRuntime(798):  at dalvik.system.NativeStart.main(Native Method)06-10 17:35:51.043: E/AndroIDRuntime(798): Caused by: java.lang.NullPointerException06-10 17:35:51.043: E/AndroIDRuntime(798):  at com.belonogov.connectjdbc.ConnectJDBCActivity$CustomDrawableVIEw.<init>(ConnectJDBCActivity.java:81)06-10 17:35:51.043: E/AndroIDRuntime(798):  at com.belonogov.connectjdbc.ConnectJDBCActivity.onCreate(ConnectJDBCActivity.java:27)06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.app.Activity.performCreate(Activity.java:4465)06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)06-10 17:35:51.043: E/AndroIDRuntime(798):  at androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:1920)06-10 17:35:51.043: E/AndroIDRuntime(798):  ... 11 more

它只是一个连接数据库的简单应用程序.

解决方法 如果可能的话,考虑在AndroID设备上远离直接JDBC.它在往返等方面效率低下,并且在不可靠的连接面前不稳健.

见How can I securely (indirectly) query a postgresql database within android?.

总结

以上是内存溢出为你收集整理的Android 4.0上的PostgreSQL JDBC连接失败全部内容，希望文章能够帮你解决Android 4.0上的PostgreSQL JDBC连接失败所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。