我有此数据库创建方法:
private void addDataBase() throws SQLException {
File FestivaleDir = new File("/sdcard/Ementor/");
if (!FestivaleDir.exists()) {
FestivaleDir.mkdirs();
}
emBase.db = getActivity().openOrCreateDatabase(
"/storage/emulated/0/Ementor/EyeModbusAndroid.db",
SQLiteDatabase.CREATE_IF_NECESSARY, null);
}
如果我在Android 4.2或更高版本上运行它,效果很好,但是在下面运行失败,logcat会说:
12-05 15:15:08.414:E / AndroidRuntime(19945):致命例外:主要12-05 15:15:08.414:E / AndroidRuntime(19945):android.database.sqlite.SQLiteCantOpenDatabaseException:未知错误(代码14) :无法打开数据库12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.database.sqlite.SQLiteConnection.nativeOpen(本机方法)12-05 15:15:08.414:E / AndroidRuntime(19945) :在android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:209)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193 )12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.database.sqlite .SQLiteDatabase.openInner(SQLiteDatabase.java:804)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)12-05 15:15 :08.414:E / AndroidRuntime(19945):在android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.app.ContextImpl。 openOrCreateDatabase(ContextImpl.java:827)12-05 15:15:08.414:E / AndroidRuntime(19945):at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:816)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:215)12-05 15:15:08.414:E / AndroidRuntime(19945):位于com.eyecom.modbusandroid.Main.addDataBase(Main.java:138)12-05 15:15:08.414:E / AndroidRuntime(19945):位于com.eyecom.modbusandroid.Main.onCreateView (Main.java:120)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.support.v4.app.Fragment.performCreateView(Fragment.java:1500)12-05 15:15:08.414 :E / AndroidRuntime(19945):位于android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.support.v4。 app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:472)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.support.v4.app .FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.support.v4.view.ViewPager.populate(ViewPager.java:1068)12-05 15 :15:08.414:E / AndroidRuntime(19945):在android.support.v4.view.ViewPager.populate(ViewPager.java:914)12-05 15:15:08.414:E / AndroidRuntime(19945):在android。 support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)12-05 15:15:08.414:E / AndroidRuntime(19945):at android.view.View.measure(View.java:15323)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4924)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android。widget.FrameLayout.onMeasure(FrameLayout.java:315)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.view.View.measure(View.java:15323)12-05 15:15: 08.414:E / AndroidRuntime(19945):位于android.widget.LinearLayout.measureVertical(LinearLayout.java:850)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.widget.LinearLayout.onMeasure(LinearLayout .java:579)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.view.View.measure(View.java:15323)12-05 15:15:08.414:E / AndroidRuntime(19945) ):位于android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4924)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.widget.FrameLayout.onMeasure(FrameLayout.java:315)12- 05 15:15:08.414:E / AndroidRuntime(19945):at com.android.internal.policy.impl.PhoneWindow $ DecorView.onMeasure(PhoneWindow.java:2155)12-05 15:15:08.414:E / AndroidRuntime( 19945):在android.view.View.measure(View.java:15323)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1854)12-05 15 :15:08.414:E / AndroidRuntime(19945):在android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1102)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.view.ViewRootImpl。 performTraversals(ViewRootImpl.java:1275)12-05 15:15:08.414:E / AndroidRuntime(19945):at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.view.ViewRootImpl $ TraversalRunnable.run(ViewRootImpl.java:4218)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.view.Choreographer $ CallbackRecord.run(Choreographer .java:725)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.view.Choreographer.doCallbacks(Choreographer.java:555)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.view.Choreographer.doFrame(Choreographer.java:525)12-05 15:15:08.414:E / AndroidRuntime(19945):在android.view.Choreographer $ FrameDisplayEventReceiver .run(Choreographer.java:711)12-05 15:15:08.414:E / AndroidRuntime(19945):at android.os.Handler.handleCallback(Handler.java:615)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.os.Handler.dispatchMessage(Handler.java:92)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.os.Looper.loop(Looper.java: 137)12-05 15:15:08.414:E / AndroidRuntime(19945):位于android.app.ActivityThread.main(ActivityThread.java:4744)12-05 15:15:08.414:E / AndroidRuntime(19945):位于java.lang.reflect.Method.invokeNative(本机方法)12-05 15:15:08.414:E / AndroidRuntime(19945):at java.lang.reflect.Method.invoke(Method.java:511)12-05 15 :15:08.414:E / AndroidRuntime(19945):位于com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:786)12-05 15:15:08.414:E / AndroidRuntime(19945):位于com.android.internal .os.ZygoteInit.main(ZygoteInit.java:553)12-05 15:15:08.414:E / AndroidRuntime(19945):在dalvik.system.NativeStart.main(本机方法)
请勿尝试指定数据库的完整路径"/storage/emulated/0/Ementor/EyeModbusAndroid.db"
。仅文件名部分就足够了"EyeModbusAndroid.db"
。
该平台将确保将数据库放置在适合您的应用程序的文件夹中。
但是,如果您确实愿意,可以指定完整路径。只要确保
File.separatorChar
ie开头/
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句