Question

我有这个问题：

public void createElement(T e) {

SQLiteDatabase db = helper.getWritableDatabase();

ContentValues values = new ContentValues();

Log.e("path", db.getPath());
}

private String getCreationString() {
        List<String> fields = getFields();

        String createString = "create table if not exists " 
                + getTableName()
                + " ( " ;

        for (String field : fields) {
            createString = createString+ " " +field +" text "+ ",";
        }

        if (createString.length() > 0 && createString.charAt(createString.length()-1)==',') {
            createString = createString.substring(0, createString.length()-1);
        }
        createString=createString+ " );";
        return createString;
    }
    public  void onCreate(SQLiteDatabase database) {
        //dropdatabase(database);
        database.execSQL(getCreationString());
    }


> 12-02 10:54:37.991: E/SQLiteLog(22945): (1) near "null": syntax error
> 12-02 10:54:38.011: E/SQLiteDatabase(22945): Error inserting  12-02
> 10:54:38.011: E/SQLiteDatabase(22945):
> android.database.sqlite.SQLiteException: near "null": syntax error
> (code 1): , while compiling: INSERT INTO mandat(null) VALUES (NULL)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native
> Method) 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1467)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> com.facilogi.transellis.database.TransellisTable.createElement(TransellisTable.java:77)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> com.facilogi.transellis.backgroundTasks.BiensWebServiceTask.parse(BiensWebServiceTask.java:40)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> com.facilogi.transellis.backgroundTasks.BiensWebServiceTask.parse(BiensWebServiceTask.java:1)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> com.facilogi.transellis.backgroundTasks.Taskellis.doInBackground(Taskellis.java:132)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> com.facilogi.transellis.backgroundTasks.Taskellis.doInBackground(Taskellis.java:1)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> com.novoda.imageloader.core.loader.util.AsyncTask$2.call(AsyncTask.java:200)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> java.util.concurrent.FutureTask.run(FutureTask.java:234) 12-02
> 10:54:38.011: E/SQLiteDatabase(22945):    at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
> 12-02 10:54:38.011: E/SQLiteDatabase(22945):  at
> java.lang.Thread.run(Thread.java:841)

中提出的例外情况

ContentValues values = new ContentValues();

我不相信这就是原因我真的不知道是什么原因可以得到任何帮助提前谢谢。

Answer 1

INSERT INTO mandat(null) VALUES (NULL)

您忘了在ContentValues中添加任何值。

Answer 2

在致电SQLiteDatabase db = helper.getWritableDatabase();

之前

你应该初始化SqliteOpenHelper

应执行dbHelper = new DatabaseAdapter(context);之类的声明。

否则您的数据库将无法打开。

在新的ContentValues（）上插入SQLite错误;

2 个答案: