Android-Intent

Android-Intent

overview

dig deep

overview

intent:
n.

1. an anticipated outcome that is intended or that guides your planned actions

2. the intended meaning of a communication

adj.

giving or marked by complete attention to

All in all , Intent is the tool to show preAction also some kind of announcement.

In Android development , Intent coould use as follow:

1,Initiate Activity/Service/BoradcastReceiver
2,Useing it's attribute value to specify more details

dig deep

Intent[Component,Action,Category,Data,Type,Extra,Flag]

Component

def
specify in which package which class you want

use
set ComponentName -> set Intent.setComponent -> start activity

best practic
Intent([PROJECT].this,[ACTIVITY].class)

Action & Category

def
an abstract movement which haven’t specify to any Activity/Service/BoradcastReceiver(crap)

think these two attributes like two QA tags on activity which will help Intent to locat specified Activity(which also include system activities)

use
AndroidMainifest -> intent-filter -> (0~N) | (0~N) | 1

best practic
intent.setAction([Action]);

intent.addCategory([Category]);

startActivity(intent);

Data & Type

def
also the principles to catch one specified Activity , also privide data and type to start Activity , which give people freedome to customize activity

use
set Data -> set Action -> run Activity

best practic
Uri uri = Uri.prase(data);

intent.setData(uri);

intent.setAction([Action]);

startActivity(intent);

Extra

def
using to exchange data between Activities

use
Extra -> Bundle / Map -> key-value

best practic

sent:

Bundle data = new Bundle();

data.putSerialzable(“person”,p);

Intent intent = new Intent(this,Result.class);

intent.putExtras(data);

startActivity(intent);

receive:

Intent intent = getIntent();

Person p = (Person) intent.getSerializableExtra(“person”);

Flag

def
controle flag

use
SDK

best practic
everywhere