那些遇到过的问题

在android上的sqlite数据库中创建表

Sla*_*nie 6 sqlite android android-logcat 

@Override
        public void onCreate(SQLiteDatabase db)
        {
            try{
                db.execSQL("create table " +          NotificationManager.getUserStatic(context) + "log ("+
                KEY_TIME +" INTEGER primary key, "+ KEY_TEXT +" TEXT not null);");

            }
            catch (SQLException e) {
                e.printStackTrace();
            }
        }

        /**
         * onOpen method called when app is opening.
         */

        @Override
        public void onOpen(SQLiteDatabase db)
        {
            try{
                System.out.println("tophere");
                db.execSQL("create table if not exists "+DATABASE_NAME+"." + NotificationManager.getUserStatic(context) + "log ("+
                KEY_TIME +" INTEGER primary key, "+ KEY_TEXT +" TEXT not null);");
                System.out.println("downhere");
            }
            catch (SQLException e){
                e.printStackTrace();
            }
        }

我们有这个代码用于为应用程序创建数据库.问题是,据我们所知,它不会创建表,因此当我们尝试插入表并从中读取时,它会崩溃.我们已经尝试了所有东西,System.out.println可以看到它失败的地方.我们得到了tophere,但它永远不会到达日志中的downhere部分,所以我们猜测某些东西导致它在那里失败.我们已经使用DDMS检查过数据库是否在正确的文件夹中,因此数据库应该在那里,但由于某种原因它无法找到它(日志中的第2行和第3行).

有什么想法吗？

这是错误日志:

04-27 10:45:46.768: I/System.out(6441): tophere
04-27 10:45:46.772: I/SqliteDatabaseCpp(6441): sqlite returned: error code = 1, msg = unknown database NOPO, db=/data/data/dmri.nopo/databases/NOPO
04-27 10:45:46.772: W/System.err(6441): android.database.sqlite.SQLiteException: unknown database NOPO: , while compiling: create table if not exists NOPO.log (time INTEGER primary key, text TEXT not null);
04-27 10:45:46.792: W/System.err(6441):     at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
04-27 10:45:46.792: W/System.err(6441):     at android.database.sqlite.SQLiteCompiledSql.(SQLiteCompiledSql.java:68)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:134)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteStatement.acquireAndLock(SQLiteStatement.java:260)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:84)
04-27 10:45:46.811: W/System.err(6441):     at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1899)
04-27 10:45:46.823: W/System.err(6441):     at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1839)
04-27 10:45:46.823: W/System.err(6441):     at dmri.nopo.DBAdapter$DatabaseHelper.onOpen(DBAdapter.java:67)
04-27 10:45:46.823: W/System.err(6441):     at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:180)
04-27 10:45:46.902: W/System.err(6441):     at dmri.nopo.DBAdapter.open(DBAdapter.java:86)
04-27 10:45:46.912: W/System.err(6441):     at dmri.nopo.LogManager.readLogFile(LogManager.java:32)
04-27 10:45:46.912: W/System.err(6441):     at dmri.nopo.LogActivity.onCreate(LogActivity.java:25)
04-27 10:45:46.921: W/System.err(6441):     at android.app.Activity.performCreate(Activity.java:4465)
04-27 10:45:46.921: W/System.err(6441):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
04-27 10:45:46.931: W/System.err(6441):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
04-27 10:45:46.931: W/System.err(6441):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
04-27 10:45:46.941: W/System.err(6441):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
04-27 10:45:46.941: W/System.err(6441):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
04-27 10:45:46.953: W/System.err(6441):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-27 10:45:46.953: W/System.err(6441):     at android.os.Looper.loop(Looper.java:137)
04-27 10:45:46.972: W/System.err(6441):     at android.app.ActivityThread.main(ActivityThread.java:4424)
04-27 10:45:46.972: W/System.err(6441):     at java.lang.reflect.Method.invokeNative(Native Method)
04-27 10:45:46.972: W/System.err(6441):     at java.lang.reflect.Method.invoke(Method.java:511)
04-27 10:45:46.982: W/System.err(6441):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
04-27 10:45:46.982: W/System.err(6441):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
04-27 10:45:46.992: W/System.err(6441):     at dalvik.system.NativeStart.main(Native Method)
04-27 10:45:47.002: I/SqliteDatabaseCpp(6441): sqlite returned: error code = 1, msg = no such table: log, db=/data/data/dmri.nopo/databases/NOPO
04-27 10:45:47.012: D/AndroidRuntime(6441): Shutting down VM
04-27 10:45:47.012: W/dalvikvm(6441): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
04-27 10:45:47.181: E/AndroidRuntime(6441): FATAL EXCEPTION: main
04-27 10:45:47.181: E/AndroidRuntime(6441): java.lang.RuntimeException: Unable to start activity ComponentInfo{dmri.nopo/dmri.nopo.LogActivity}: android.database.sqlite.SQLiteException: no such table: log: , while compiling: SELECT time, text FROM log
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.os.Looper.loop(Looper.java:137)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.main(ActivityThread.java:4424)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at java.lang.reflect.Method.invokeNative(Native Method)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at java.lang.reflect.Method.invoke(Method.java:511)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at dalvik.system.NativeStart.main(Native Method)
04-27 10:45:47.181: E/AndroidRuntime(6441): Caused by: android.database.sqlite.SQLiteException: no such table: log: , while compiling: SELECT time, text FROM log
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteCompiledSql.(SQLiteCompiledSql.java:68)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteProgram.(SQLiteProgram.java:127)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteProgram.(SQLiteProgram.java:94)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteQuery.(SQLiteQuery.java:53)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1564)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1449)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1405)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1485)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at dmri.nopo.DBAdapter.getAllSMS(DBAdapter.java:116)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at dmri.nopo.LogManager.readLogFile(LogManager.java:34)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at dmri.nopo.LogActivity.onCreate(LogActivity.java:25)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.Activity.performCreate(Activity.java:4465)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
04-27 10:45:47.181: E/AndroidRuntime(6441):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
04-27 10:45:47.181: E/AndroidRuntime(6441):     ... 11 more

Evi*_*uck 3

首先，我建议使用 android.util.Log 来记录 Android 中的异常。

其次 - 我怀疑您创建了名称错误的表。您的错误表明查询找不到“log”，但我看到您在“CREATE”语句中进行了一些串联。也许就是这个原因。

您可以检查实际为您创建的内容。通过查看创建的sqlite库。

你可以试试：

  1. adb shell
  2. cd /data/data/<your.package.name>/databases
  3. sqlite3 <yourdbname>
  4. .tables

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