我有一个函数，它在sqlite@R_301_457@中的表上执行查询。我声明一个常量：public static final String CANADA_HISTORY =“加拿大历史”;这个存储在一个String变量中我们说难度， @H_403_1@我有一个查询：

Cursor c = mDb.rawQuery("select * from Questions_answers where CHAPTERS = '"+difficulty+"'",null);

@H_403_1@它在撇号附近抛出异常。

@H_403_1@Logcat输出：

I/Database( 1170): sqlite returned: error code = 1,msg = near "s": Syntax error
D/AndroidRuntime( 1170): Shutting down VM
W/dalvikvm( 1170): threadid=1: thread exiting with uncaught exception (group=0x40015560)
E/AndroidRuntime( 1170): FATAL EXCEPTION: main
E/AndroidRuntime( 1170): android.database.sqlite.sqliteException: near "s": Syntax error:,while compiling: select * from Questions_answers where CHAPTERS  = 'Canada's History'

@H_403_1@我也试过：

1.  difficulty=difficulty.replaceAll("'","''");
2.  difficulty=difficulty.replaceAll("'","\'");
3.  difficulty = DatabaseUtils.sqlEscapeString(difficulty);

@H_403_1@除此之外，它还为我的单词，如加拿大历史，我的意思是没有特殊字符。

@H_403_1@请给我建议解决问题谢谢。

difficulty=difficulty.replaceAll("'","\'");

"select * from Questions_answers where CHAPTERS='"+difficulty+"'";

q = "select * from Questions_answers where CHAPTERS = ?";
    database.rawQuery(q,new String[] { difficulty});