SqLite的query方法，参数args中不能含null值

[html]
Android 2.3.3  
Eclipse Version: 3.7.0  
LogCat   

LogCat  报错信息：

[java]
03-13 11:37:27.419: ERROR/AndroidRuntime(844): java.lang.IllegalArgumentException: the bind value at index 2 is null 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at android.database.sqlite.SQLiteProgram.bindString(SQLiteProgram.java:237) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at android.database.sqlite.SQLiteQuery.bindString(SQLiteQuery.java:185) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:48) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1356) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1235) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1189) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1271) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at com.taobao.htc.db.RecordDBHelper.query(RecordDBHelper.java:53) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at com.taobao.htc.manage.RecordDBopt.get(RecordDBopt.java:80) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at com.taobao.htc.Play.savePlayCount(Play.java:775) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at com.taobao.htc.Play$5.run(Play.java:369) 
03-13 11:37:27.419: ERROR/AndroidRuntime(844): at java.util.Timer$TimerImpl.run(Timer.java:284) 

发生错误原因分析：

检查相关代码，发现

传入savePlayCount的String值programid为null,在传入之前和传入后均未作判断

[java]
public void savePlayCount(String programid, int count) { 
…… 
} 
而programid最终作为参数args这个数组中的一个值，用于数据库查询
[html]
Cursor cur = db.query(TBL_NAME, null, where, args, null, null, order); 
由于args这个String数组中的String有null值，报错
 

解决办法：

在传入programid前或之后对其值作判断

[java]
if (programid != null) { 
[java]
…… 

 PS：args这个String数组中不能有null值


摘自 DebugLog的专栏