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POAndroid and db4o.Can Create db on emulator but not on real device
 

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  1. POAndroid and db4o.Can Create db on emulator but not on real device
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    <p>I'm writing my first Android app. And i wanted to use db4o, just because i've never used it before. I just try to open/create the database.Everything works fine when i running this on a virtual device. But when im going for my real device i always get the exceptions written below:</p> <pre><code> ...ActivityClass{ private void deleteDB() { DatabaseHandler db = new DatabaseHandler(); db.open(getString(R.string.database)); db.deleteAll(); db.close(); } }.... The R.string.database = /data/data/de.workingtimemanager.urb/databases/WTM.db my package = de.workingtimemanager.urb public class DatabaseHandler { private ObjectContainer database; public DatabaseHandler() {} public void open(String name) { EmbeddedConfiguration conf = Db4oEmbedded.newConfiguration(); conf.common().objectClass(User.class).cascadeOnDelete(true); conf.common().objectClass(User.class).cascadeOnUpdate(true); conf.common().objectClass(Project.class).cascadeOnDelete(true); conf.common().objectClass(Project.class).cascadeOnUpdate(true); database = Db4oEmbedded.openFile(conf, name); } } 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): java.lang.RuntimeException: Unable to start activity ComponentInfo{de.workingtimemanager.urb/de.workingtimemanager.urb.WorkingTimeManagerActivity}: com.db4o.ext.Db4oIOException: /data/data/de.workingtimemanager.urb/databases/WTM.db (No such file or directory) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at android.os.Handler.dispatchMessage(Handler.java:99) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at android.os.Looper.loop(Looper.java:123) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at android.app.ActivityThread.main(ActivityThread.java:3691) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at java.lang.reflect.Method.invokeNative(Native Method) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at java.lang.reflect.Method.invoke(Method.java:507) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at dalvik.system.NativeStart.main(Native Method) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): Caused by: com.db4o.ext.Db4oIOException: /data/data/de.workingtimemanager.urb/databases/WTM.db (No such file or directory) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.io.RandomAccessFileFactory.newRandomAccessFile(RandomAccessFileFactory.java:26) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.io.FileStorage$FileBin.&lt;init&gt;(FileStorage.java:43) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.io.FileStorage.open(FileStorage.java:22) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.io.StorageDecorator.open(StorageDecorator.java:27) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.io.CachingStorage.open(CachingStorage.java:52) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.internal.IoAdaptedObjectContainer.openImpl(IoAdaptedObjectContainer.java:57) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.internal.ObjectContainerBase$1.run(ObjectContainerBase.java:140) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.foundation.DynamicVariable.with(DynamicVariable.java:54) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.foundation.Environments.runWith(Environments.java:28) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.internal.ObjectContainerBase.withEnvironment(ObjectContainerBase.java:161) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.internal.ObjectContainerBase.open(ObjectContainerBase.java:131) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.internal.IoAdaptedObjectContainer.&lt;init&gt;(IoAdaptedObjectContainer.java:35) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.internal.ObjectContainerFactory.openObjectContainer(ObjectContainerFactory.java:18) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.Db4oEmbedded.openFile(Db4oEmbedded.java:65) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at de.workingtimemanager.urb.db.DatabaseHandler.open(DatabaseHandler.java:33) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at de.workingtimemanager.urb.WorkingTimeManagerActivity.deleteDB(WorkingTimeManagerActivity.java:22) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at de.workingtimemanager.urb.WorkingTimeManagerActivity.onCreate(WorkingTimeManagerActivity.java:15) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): ... 11 more 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): Caused by: java.io.FileNotFoundException: /data/data/de.workingtimemanager.urb/databases/WTM.db (No such file or directory) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at org.apache.harmony.luni.platform.OSFileSystem.open(Native Method) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at dalvik.system.BlockGuard$WrappedFileSystem.open(BlockGuard.java:232) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at java.io.RandomAccessFile.&lt;init&gt;(RandomAccessFile.java:132) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at java.io.RandomAccessFile.&lt;init&gt;(RandomAccessFile.java:173) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): at com.db4o.io.RandomAccessFileFactory.newRandomAccessFile(RandomAccessFileFactory.java:19) 11-01 13:38:36.385: ERROR/AndroidRuntime(4774): ... 29 more </code></pre>
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