SQLite: Cannot bind argument at index 1 because the index is out of range. The statement has 0 parameters,怎么解决?

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我得到以下错误:

12-25 22:52:50.252: E/AndroidRuntime(813): Caused by: java.lang.IllegalArgumentException: Cannot bind argument at index 1 because the index is out of range.  The statement has 0 parameters.
12-25 22:52:50.252: E/AndroidRuntime(813):  at android.database.sqlite.SQLiteProgram.bind(SQLiteProgram.java:212)
12-25 22:52:50.252: E/AndroidRuntime(813):  at android.database.sqlite.SQLiteProgram.bindString(SQLiteProgram.java:166)
12-25 22:52:50.252: E/AndroidRuntime(813):  at android.database.sqlite.SQLiteProgram.bindAllArgsAsStrings(SQLiteProgram.java:200)
12-25 22:52:50.252: E/AndroidRuntime(813):  at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47)
12-25 22:52:50.252: E/AndroidRuntime(813):  at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
12-25 22:52:50.252: E/AndroidRuntime(813):  at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1161)
12-25 22:52:50.252: E/AndroidRuntime(813):  at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1032)
12-25 22:52:50.252: E/AndroidRuntime(813):  at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1200)

代码如下:

public Player getPlayer(String name) {
    SQLiteDatabase db = this.getReadableDatabase();

    String[] projection = {
            PlayerEntry.COLUMN_NAME_PLAYER_NAME,
            PlayerEntry.COLUMN_NAME_PLAYED_GAMES,
            };

    String selection =  PlayerEntry.COLUMN_NAME_PLAYER_NAME ;
    String[] selectionArgs = new String[1];
    selectionArgs[0] = name;

    Cursor cursor = db.query(
            PlayerEntry.TABLE_NAME,  // The table to query
            projection,                               // The columns to return
            selection,                                // The columns for the WHERE clause
            selectionArgs,                            // The values for the WHERE clause
            null,                                     // don't group the rows
            null,                                     // don't filter by row groups
            null                                 // The sort order
            );

    if (cursor != null)
        cursor.moveToFirst();
提问于
用户回答回答于

selection应该是一种表达selectionArgs应该有尽可能多的元素?中的文字占位符selection

selection不是表达式,也没有?但是你有一个元素selectionArgs

你可能想要这样的东西:

String selection =  PlayerEntry.COLUMN_NAME_PLAYER_NAME + "=?";

要使其成为一个与Player Name列匹配的表达式,它与您要绑定的文本匹配。

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