android 特殊字符转,如何转义特殊字符,如’在sqlite在android
我有一个函数,它在sqlite数据库中的表上执行查询。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,
我有一个查询:
Cursor c = mDb.rawQuery("select * from Questions_answers where CHAPTERS = '"+difficulty+"'",null);
它在撇号附近抛出异常。
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'
我也试过:
1. difficulty=difficulty.replaceAll("'","''");
2. difficulty=difficulty.replaceAll("'","\'");
3. difficulty = DatabaseUtils.sqlEscapeString(difficulty);
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。
请给我建议解决问题谢谢。