How to transmit object data in Android

In Android application development, if we need to transmit data between different modules (such as between different activities), there are usually two methods:

1. Use the intent object to carry data

By querying the API documentation of intent/bundle, we can know that,Intent/bundleData of the basic type and array data of the basic type can be transferred, andString/charsequenceTypes of data andString/charsequenceArray data. However, other types of data seem to be powerless. Otherwise, we can see that intent/bundle can be passed in the intent/bundle API.Parcelable(Package, package) andSerializable(Serialized) data and their array/List data.

Therefore, to transmit non-basic and non-string/charsequence data through intent/bundle, we need to implementParcelableInterface orSerializableInterface.

1.1 Use the parcelable interface to transmit data through intent/bundle

 /**  
* Represents a person's Information
*  @ Author  Gansc
  */  
  Public     Class Personinfo  Implements  Parcelable
{
  Public  String INAME;  //  Person Name  
    Public     Int  Isex;  //  Gender  
   Public  String IID;  //  ID card number  
    Public  String imobilenumber;  //  Mobile phone number  
    Public  String iemailaddr;  //  Email Address 

//From parcelable
@ Override
Public IntDescribecontents ()
{
Return 0;
}
 

 //  From parcelable
  // Save to package  
  @ Override
  Public     Void  Writetoparcel (parcel DEST,  Int  Flags)
{
DeST. writestring (INAME );
DeST. writeint (isex );
DeST. writestring (IID );
DeST. writestring (imobilenumber );
DeST. writestring (iemailaddr );
}

  //  Among the types that implement the parcelable interface, there must be a static constant member field that implements the parcelable. Creator interface,
  // And its name must be creator's  
    Public     Static     Final  Parcelable. Creator  <  Personinfo  >  Creator
  =     New  Parcelable. Creator <  Personinfo  >  ()
{
  //  From parcelable. Creator  
  @ Override
  Public  Personinfo createfromparcel (parcel in)
{
Personinfo brief  =     New  Personinfo ();

  // Read data from packages  
  Brief. INAME  =  In. readstring ();
Brief. isex  =  In. readint ();
Brief. IID  =  In. readstring ();
Brief. imobilenumber  =  In. readstring ();

Brief. iemailaddr  =  In. readstring ();

  Return  brief; 
}

   
  //   from parcelable. creator   
   @ override 
   Public   personinfo [] newarray (  int   size) 
{< br>   return     New   personinfo [size]; 
}< BR >}; 
} 

2. Define a public static member variable, which is included in different modules and used to transmit data between different modules.