java.lang.IllegalArgumentException: the bind value at index 1 is null

    今天在用SQLiteDatabase检查表中是否存在某个字段的时候遇到这个错误

Cursor cursor = db.rawQuery(existSql, new String[]{useraccount});

     java.lang.IllegalArgumentException: the bind value at index 1 is null     意思是要搜索的字段为空,  一个是我太不小心了(-.=|||竟然绑定错控件),第二个是方法调错了(囧)

     在用SQLiteDatabase查询有两种方法:

      1.

Cursor cursor = db.query(TABLE_NAME, null,"account=?", new String[]{useraccount}, null, null, null);while(cursor.moveToFirst)

      2.

String existSql = "select * from "+TABLE_NAME+" where account=?";Cursor cursor = db.rawQuery(existSql, new String[]{useraccount});
while(cursor.moveToFirst)


     因为这次粗心大意..浪费了半天    -_-|||必须记录下来以此为鉴.
	
				
	
					   
java.lang.IllegalArgumentException: the bind value at index 1 is null   or  java.lang.IllegalArgumen
	  	   
java.lang.IllegalArgumentException: the bind value at index 1 is null
	  	   
Caused by: java.lang.IllegalArgumentException: the bind value at index 1 is null
	  	   
Caused by: java.lang.IllegalArgumentException: the bind value at index 1 is null
	  	   
Caused by: java.lang.IllegalArgumentException: the bind value at index 1 is null
	  	   
java.lang.IllegalArgumentException: the bind value at index 1 is null
	  	   
问题：java.lang.IllegalArgumentException:the bind value at index is null
	  	   
问题：java.lang.IllegalArgumentException:the bind value at index is null
	  	   
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