我有一个名为notes的表和一个名为getlist（）的方法，它从数据库中检索数据。现在的问题是，当执行getlist（）方法时，应用程序崩溃并且它表示没有这样的列DeletedNotes甚至在create table语句中指定它。
这是我的代码：
public class DBOpenHelper extends SQLiteOpenHelper {
public static final String DB_Name="Notes.db";
public static final int DB_Version=1;
public static final String Table_Name="NoteData";
public static final String id="_id";
public static final String Note_Title="noteTitle";
public static final String Note_Text="NoteText";
public static final String Note_Created="NoteCreated";
public static final String DELETED_NOtes="DeletedNotes";
public static final String Archived_Notes="ArchiveNotes";
public static final int True=1;
public static final int False=0;
//SQLite Query
public static final String Table_Create=
"CREATE TABLE "+Table_Name+"("
+id+" INTEGER PRIMARY KEY, "
+Note_Title+" TEXT, "
+Note_Text+" TEXT, "
+Note_Created+" TEXT default CURRENT_TIMESTAMP, "
+DELETED_NOtes+"INTEGER DEFAULT "+False+", "
+Archived_Notes+"INTEGER DEFAULT "+False+" "
+");";
public DBOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, DB_Name, null, DB_Version);
}
@Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
sqLiteDatabase.execSQL(Table_Create);
}
@Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
sqLiteDatabase.execSQL("DROP TABLE IF EXISTS "+Table_Name);
onCreate(sqLiteDatabase);
}
public Cursor getList(){
SQLiteDatabase sqLiteDatabase=this.getWritableDatabase();
Cursor data=sqLiteDatabase.rawQuery("Select * from "+Table_Name+" WHERE "+DELETED_NOtes+" = "+False+" AND "+Archived_Notes+" = "+False+"; ",null);
return data;
}
这是我的logcat：
08-26 18:52:14.812 8731-8731/com.example.chirag.stickynotes E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.chirag.stickynotes, PID: 8731
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.chirag.stickynotes/com.example.chirag.stickynotes.MainActivity}: android.database.sqlite.SQLiteException: no such column: DeletedNotes (code 1): , while compiling: Select * from NoteData WHERE DeletedNotes = 0 AND ArchiveNotes = 0;
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: android.database.sqlite.SQLiteException: no such column: DeletedNotes (code 1): , while compiling: Select * from NoteData WHERE DeletedNotes = 0 AND ArchiveNotes = 0;
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1318)
at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1257)
at com.example.chirag.stickynotes.DBOpenHelper.getList(DBOpenHelper.java:85)
at com.example.chirag.stickynotes.TextFragment.onCreateView(TextFragment.java:64)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2239)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1332)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1574)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1641)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:794)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2415)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2200)
at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2153)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2063)
at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:554)
at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1248)
at android.app.Activity.performStart(Activity.java:6696)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2628)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
08-26 18：52：14.893 1585-1662 / system_process W / ActivityManager：强制完成活动com.example.chirag.stickynotes / .MainActivity 08-26 18：52：15.121 1585-3167 / system_process I / OpenGLRenderer：初始化的EGL，版本1.4 08-26 18：52：15.121 1585-3167 / system_process D / OpenGLRenderer：交换行为1
答案 0 :(得分：0)
您应该在列名称DELETEED_NOtes和Archived_Notes旁边留空格。在您的代码中，由于列名称和类型INTEGER之间没有空格，因此表格将使用如下列名称创建：DeletedNotesINTEGER
public static final String Table_Create =
"CREATE TABLE "+Table_Name +"("
+id+" INTEGER PRIMARY KEY, "
+Note_Title+" TEXT, "
+Note_Text+" TEXT, "
+Note_Created+" TEXT default CURRENT_TIMESTAMP, "
+DELETED_NOtes+" INTEGER DEFAULT "+False+", "
+Archived_Notes+" INTEGER DEFAULT "+False+" "
+");";