SQLite的query方法，注意检查参数args中是否含null值
Android 2.3.3Eclipse Version: 3.7.0
LogCat
LogCat 报错信息：
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): java.lang.IllegalArgumentException: the bind value at index 2 is null
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at android.database.sqlite.SQLiteProgram.bindString(SQLiteProgram.java:237)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at android.database.sqlite.SQLiteQuery.bindString(SQLiteQuery.java:185)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:48)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1356)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1235)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1189)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1271)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at com.tmall.nokia.db.RecordDBHelper.query(RecordDBHelper.java:53)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at com.tmall.nokia.manage.RecordDBopt.get(RecordDBopt.java:80)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at com.tmall.nokia.Play.savePlayCount(Play.java:775)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at com.tmall.nokia.Play$5.run(Play.java:369)
03-13 10:25:37.163: ERROR/AndroidRuntime(4166): at java.util.Timer$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
public void savePlayCount(String programid, int count) {
……
}
而programid最终作为参数args这个String数组中的一个值，用于数据库查询
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
if (programid != null) {
……
}
PS：args这个String数组中不能有null值
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