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POHow to Create database for objects in Android
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  1. POHow to Create database for objects in Android
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    copied!<p>In my app I have 3 edit text and a save button, I want to store these values on a button click using db4o.But it is showing a null pointer exception.</p> <p>Logcat Details:</p> <pre><code>11-12 14:29:32.566: W/KeyCharacterMap(12122): No keyboard for id 0 11-12 14:29:32.594: W/KeyCharacterMap(12122): Using default keymap: /system/usr/keychars/qwerty.kcm.bin 11-12 14:29:41.694: D/AndroidRuntime(12122): Shutting down VM 11-12 14:29:41.694: W/dalvikvm(12122): threadid=1: thread exiting with uncaught exception (group=0x40015560) 11-12 14:29:41.863: E/AndroidRuntime(12122): FATAL EXCEPTION: main 11-12 14:29:41.863: E/AndroidRuntime(12122): java.lang.NullPointerException 11-12 14:29:41.863: E/AndroidRuntime(12122): at java.io.File.fixSlashes(File.java:205) 11-12 14:29:41.863: E/AndroidRuntime(12122): at java.io.File.init(File.java:189) 11-12 14:29:41.863: E/AndroidRuntime(12122): at java.io.File.&lt;init&gt;(File.java:139) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.io.FileStorage.exists(FileStorage.java:29) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.io.StorageDecorator.exists(StorageDecorator.java:23) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.internal.IoAdaptedObjectContainer.openImpl(IoAdaptedObjectContainer.java:42) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.internal.ObjectContainerBase$1.run(ObjectContainerBase.java:140) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.foundation.DynamicVariable.with(DynamicVariable.java:54) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.foundation.Environments.runWith(Environments.java:28) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.internal.ObjectContainerBase.withEnvironment(ObjectContainerBase.java:161) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.internal.ObjectContainerBase.open(ObjectContainerBase.java:131) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.internal.IoAdaptedObjectContainer.&lt;init&gt;(IoAdaptedObjectContainer.java:35) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.internal.ObjectContainerFactory.openObjectContainer(ObjectContainerFactory.java:18) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.db4o.Db4oEmbedded.openFile(Db4oEmbedded.java:65) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.example.db4object.Db4ObjectsHelper.OpenDb(Db4ObjectsHelper.java:23) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.example.db4object.MainActivity$1.onClick(MainActivity.java:33) 11-12 14:29:41.863: E/AndroidRuntime(12122): at android.view.View.performClick(View.java:2485) 11-12 14:29:41.863: E/AndroidRuntime(12122): at android.view.View$PerformClick.run(View.java:9080) 11-12 14:29:41.863: E/AndroidRuntime(12122): at android.os.Handler.handleCallback(Handler.java:587) 11-12 14:29:41.863: E/AndroidRuntime(12122): at android.os.Handler.dispatchMessage(Handler.java:92) 11-12 14:29:41.863: E/AndroidRuntime(12122): at android.os.Looper.loop(Looper.java:123) 11-12 14:29:41.863: E/AndroidRuntime(12122): at android.app.ActivityThread.main(ActivityThread.java:3683) 11-12 14:29:41.863: E/AndroidRuntime(12122): at java.lang.reflect.Method.invokeNative(Native Method) 11-12 14:29:41.863: E/AndroidRuntime(12122): at java.lang.reflect.Method.invoke(Method.java:507) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 11-12 14:29:41.863: E/AndroidRuntime(12122): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 11-12 14:29:41.863: E/AndroidRuntime(12122): at dalvik.system.NativeStart.main(Native Method) 11-12 14:29:41.963: D/dalvikvm(12122): GC_CONCURRENT freed 310K, 52% free 2733K/5639K, external 410K/517K, paused 13ms+9ms 11-12 14:34:42.160: I/Process(12122): Sending signal. PID: 12122 SIG: 9 </code></pre> <p>Please help.</p>
 

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