Android uses the java reflection principle to add objects to the sqsag database.

Android uses the java reflection principle to add objects to the sqsag database.

Using the reflection mechanism of java, we can get the method list, parameter list, and corresponding value in the object, then we can use these methods to insert the Database 10 thousand.

 

In the following method, the table name must be the same as the database name.

Protected void insert (Object ob ){
ContentValues initialValues = new ContentValues ();
Class c = ob. getClass ();
String className = c. getName ();
String tableName = className. substring (className. toString (). lastIndexOf (".") + 1 );
String deviceName = "";
System. out. println ("tableName:" + tableName );
Field [] fields = c. getDeclaredFields ();
Try {
For (Field f: fields ){
F. setAccessible (true );
String str = f. toString (). substring (f. toString (). lastIndexOf (".") + 1 );
Object obj = f. get (ob );
If (str. equals ("deviceName "));
If (obj! = Null &&! Obj. toString (). equals ("0 ")){
InitialValues. put (str, obj + "");
}
// System. out. println ("params:" + str + "value:" + f. get (ob). toString ());
}
} Catch (IllegalArgumentException e ){
E. printStackTrace ();
} Catch (IllegalAccessException e ){
E. printStackTrace ();
}
Long ss = db. insert (tableName, null, initialValues );

}

You can use the launch principle to add, delete, and delete the query. Here, we only add the query.