Android intent transmits list or object

Method 1:
If you simply pass list <string> or list <integer>, you can directly use

Java code

Intent. putstringarraylistextra (name, value)

Intent. putintegerarraylistextra (name, value)

Method 2:
If list <Object> is passed, you can convert list to serializable type, and then use
Java code putextras (Key, (serializable) List)
Method passed, used for acceptance
Java code (list <yourobject>) getintent (). getserializable (key)
You can receive the list <yourobject> data.

But remember that your yourobject class must implement the serializable interface.

Method 3:
One is
Java code bundle. putserializable (Key, object );
The other is
Java code bundle. putparcelable (Key, object );
Of course, these objects have certain conditions. The former implements the serializable interface, while the latter implements the parcelable interface.


Method 4:
It is inconvenient to use intent to transmit data. We can write a global data in the application.

1. Create a subclass of your own Android. App. Application
2. Declare this class in manifest,
3. In this case, Android creates a globally available instance. You can use context. getapplicationcontext () to obtain the instance anywhere else, and then obtain the status (variable ).

Inherit Application
Java code

Class MyApp extends application {

Private string mystate;

Public String getstate (){

Return mystate;

}

Public void setstate (string s ){

Mystate = s;

}

}

For the configuration in androidmanifest. XML, you can directly add a name to the application, as shown below:
Java code <application Android: Name = ". MyApp" Android: icon = "@ drawable/icon" Android: Label = "@ string/app_name">

Use
Java code

Class blah extends activity {

@ Override

Public void oncreate (bundle B ){

...

MyApp appstate = (MyApp) getapplicationcontext ());

String state = appstate. getstate ();

...

}

}

 

* ** This is reproduced, but I feel more commonly used to open parameters here: http://hi.baidu.com/ihsauqaxblbdmwq/item/dfc9cf9c352b0bdf1a49dfd5