創建數據庫時插入多條記錄

Question

我試圖在sqlite數據庫中一次插入多條記錄。我想填充數據庫，然後使用該記錄填充列表視圖。所以我想在我的第二個活動中執行插入查詢，即MenuActivity的oncreate方法。我認爲它會填充數據庫，然後我將能夠根據需要檢索數據。但它在logcat中給出了一些錯誤。任何人都可以提供幫助。

MenuActivity.java

protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     //requestWindowFeature(Window.FEATURE_NO_TITLE); 
     setContentView(R.layout.activity_menu); 

     //setting db environment 
     dbhelper = new ToursOpenHelper(this); 
     sqldb = dbhelper.getWritableDatabase(); 
     sqldb.execSQL("INSERT INTO "+tourEntry.TABLE+ 
" SELECT "+tourEntry.TOURTYPE+" AS 'Tour_type' , "+tourEntry.TOURNAME+" AS 'Tour_name', "+tourEntry.NIGHTS+" AS 'Nights', "+tourEntry.DAYS+" AS 'Day', "+tourEntry.PIC+" AS 'Pic'"+ 
" UNION SELECT '1', '3', 'Delhi Tour', '1', '2', 'img/mini-vacation/lotus.png'"+ 
" UNION SELECT '2', '3', 'Taj Mahal Tour By Train (Same Day Return)', '1', '1', 'img/mini-vacations/taj-train.jpg"+ 
" UNION SELECT '3', '3', 'Taj Mahal Trip By Car (Same Day Return)', '1', '1', 'img/mini-vacations/'"+ 
" UNION SELECT '4', '3', 'Taj Mahal Trip', '1', '2', 'img/mini-vacations/noimg.png'"+ 
" UNION SELECT '5', '3', 'Pink City Tour (Same Day Return)', '1', '1', 'img/mini-vacations/noimg.png'"); 

的logcat：

07-28 11:54:37.064: E/OpenGLRenderer(4396): OpenGLRenderer is out of memory! 
07-28 11:54:41.869: E/AndroidRuntime(4396): FATAL EXCEPTION: main 
07-28 11:54:41.869: E/AndroidRuntime(4396): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.travelplanner/com.example.travelplanner.MenuActivity}: android.database.sqlite.SQLiteException: near "3": syntax error: , while compiling: INSERT INTO tour SELECT tour_type AS 'Tour_type' , tour_name AS 'Tour_name', nights AS 'Nights', days AS 'Day', pic AS 'Pic' UNION SELECT '1', '3', 'Delhi Tour', '1', '2', 'img/mini-vacation/lotus.png' UNION SELECT '2', '3', 'Taj Mahal Tour By Train (Same Day Return)', '1', '1', 'img/mini-vacations/taj-train.jpg UNION SELECT '3', '3', 'Taj Mahal Trip By Car (Same Day Return)', '1', '1', 'img/mini-vacations/' UNION SELECT '4', '3', 'Taj Mahal Trip', '1', '2', 'img/mini-vacations/noimg.png' UNION SELECT '5', '3', 'Pink City Tour (Same Day Return)', '1', '1', 'img/mini-vacations/noimg.png' 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.app.ActivityThread.access$600(ActivityThread.java:127) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.os.Looper.loop(Looper.java:137) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.app.ActivityThread.main(ActivityThread.java:4448) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at java.lang.reflect.Method.invoke(Method.java:511) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at dalvik.system.NativeStart.main(Native Method) 
07-28 11:54:41.869: E/AndroidRuntime(4396): Caused by: android.database.sqlite.SQLiteException: near "3": syntax error: , while compiling: INSERT INTO tour SELECT tour_type AS 'Tour_type' , tour_name AS 'Tour_name', nights AS 'Nights', days AS 'Day', pic AS 'Pic' UNION SELECT '1', '3', 'Delhi Tour', '1', '2', 'img/mini-vacation/lotus.png' UNION SELECT '2', '3', 'Taj Mahal Tour By Train (Same Day Return)', '1', '1', 'img/mini-vacations/taj-train.jpg UNION SELECT '3', '3', 'Taj Mahal Trip By Car (Same Day Return)', '1', '1', 'img/mini-vacations/' UNION SELECT '4', '3', 'Taj Mahal Trip', '1', '2', 'img/mini-vacations/noimg.png' UNION SELECT '5', '3', 'Pink City Tour (Same Day Return)', '1', '1', 'img/mini-vacations/noimg.png' 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:68) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.database.sqlite.SQLiteStatement.acquireAndLock(SQLiteStatement.java:266) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:88) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1905) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1845) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at com.example.travelplanner.MenuActivity.onCreate(MenuActivity.java:54) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.app.Activity.performCreate(Activity.java:4465) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931) 
07-28 11:54:41.869: E/AndroidRuntime(4396):  ... 11 more 

Answer 1

我不會用這樣做，在onCreate方法，因爲它僅應以創建數據庫模式，並沒有別的使用。最好的方法是創建另一種方法，它可以在數據庫適配器或全新的類中執行所有插入操作，並在應用程序循環中的任何位置調用onCreate方法後調用它。