Android Review notes--intent

Intent is an important way to jump through components in Android, and is generally pathetic for scenarios such as initiating activities, starting services, and sending broadcasts.

#显示Intent

Primarily used to start a known component

Sending party

Intent Intent = new Intent (firstactivity.this, Secondactivity.class);

Intent.putextra ("Extra_data", data);

StartActivity (Intent);

Receiving party

Intent Intent = Getintent ();

String data = Intent.getstringextra ("Extra_data");

# Hidden Show Intent

(1) Action

(2) Category

(3) Data:scheme, host, path, type

Intent Intent = new Intent ("Com.example.activitytest.ACTION_START");

Intent.addcategory ("Com.example.activitytest.MY_CATEGORY");

If you do not add category, default is used

StartActivity (Intent);

Androidmanifest.xml

Used to respond to intent

<activity android:name= ". Secondactivity ">

<intent-filter>

<action android:name= "Com.example.activitytest.ACTION_START"/>

<category android:name= "Android.intent.category.DEFAULT"/>

</intent-filter>

</activity>

# #使用Intent启动浏览器

Intent Intent = new Intent (Intent.action_view);

Intent.setdata (Uri.parse ("http://www.baidu.com"));

StartActivity (Intent);

Android Review notes--intent