Question

我正在开发我的第一个应用程序，我正在填写一些城市的arraylist，但其中一个（“Reggio nell'Emilia”）在其名称中有一个撇号，当我在应用程序中选择它时会崩溃。这是代码：

SQLiteDatabase db_read = db.getReadableDatabase();
city = new ArrayList<Object>();
Cursor result;
for (int i =0 ; i<region.size(); i++) {
    result = db_read.rawQuery("select distinct city from merchants where region='"+region.get(i)+"' order by city ASC",null);
    ArrayList<String> cities = new ArrayList<String>();
    while (result.moveToNext()) {
        String city = result.getString(0);
        cities.add(city);
    }
    city.add(cities);
}

以下是LogCat中的错误：

07-26 14:25:4    0.11    0: I/Timeline(155    06): Timeline: Activity_launch_request id:com.example.myapp time:1    0873122
07-26 14:25:4    0.225: E/SQLiteLog(155    06): (1) near "Emilia": syntax error
07-26 14:25:4    0.225: D/AndroidRuntime(155    06): Shutting down VM
07-26 14:25:4    0.225: W/dalvikvm(155    06): threadid=1: thread exiting with uncaught exception (group=    0x41f17ce    0)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06): FATAL EXCEPTION: main
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06): Process: com.example.myapp, PID: 155    06
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapp/com.example.myapp.ListMerchant}: android.database.sqlite.SQLiteException: near "Emilia": syntax error (code 1): , while compiling: Select _id,title,phone,comune from merchants where city='Reggio nell'Emilia'
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2217)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2266)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.app.ActivityThread.access$8    0    0(ActivityThread.java:145)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:12    06)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.os.Handler.dispatchMessage(Handler.java:1    02)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.os.Looper.loop(Looper.java:136)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.app.ActivityThread.main(ActivityThread.java:5141)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at java.lang.reflect.Method.invokeNative(Native Method)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at java.lang.reflect.Method.invoke(Method.java:515)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at dalvik.system.NativeStart.main(Native Method)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06): Caused by: android.database.sqlite.SQLiteException: near "Emilia": syntax error (code 1): , while compiling: Select _id,title,phone,comune from merchants where city='Reggio nell'Emilia'
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:5    0    0)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1253)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at com.example.myapp.ListMerchant.createListFromCity(ListMerchant.java:63)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at com.example.myapp.ListMerchant.onCreate(ListMerchant.java:43)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.app.Activity.performCreate(Activity.java:5231)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1    087)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2171)
07-26 14:25:4    0.24    0: E/AndroidRuntime(155    06):    ... 11 more

可能是什么问题以及如何解决？我希望这段代码和这个错误日志足以弄清问题是什么......

Answer 1

我终于解决用双撇号替换单撇号：

String city = result.getString(0);
city = city.replace("'", "''");

填充arraylist时出现撇号错误

1 个答案: