SQLite：由于索引超出范围，无法在索引1处绑定参数。 该语句有0个参数

我得到以下错误，我不知道为什么发生。 我想知道是否还有其他人能够解决这个问题。

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) 

代码在这里：

 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(); 

Answer 1

selection应该是一个expression式和selectionArgs应该有尽可能多的元素? 文字占位符的selection 。

你的selection不是一个expression式，并没有任何? 但是在selectionArgs有一个元素。

你可能想要像这样的东西：

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

使其成为与玩家名称列匹配的expression式再次与您在selectionArgs[0]绑定的字面值相匹配。