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Android-Intents-2 part 2

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Customized Java EE Training: http://courses.coreservlets.com/

Java, JSF 2, PrimeFaces, Servlets, JSP, Ajax, jQuery, Spring, Hibernate, RESTful Web Services, Hadoop, Android.

Developed and taught by well-known author and developer. At public venues or onsite at your location.

Intents, Intent Filters,

and Invoking Activities:

Part II: Using URI

Originals of Slides and Source Code for Examples:

http://www.coreservlets.com/android-tutorial/

Customized Java EE Training: http://courses.coreservlets.com/

Java, JSF 2, PrimeFaces, Servlets, JSP, Ajax, jQuery, Spring, Hibernate, RESTful Web Services, Hadoop, Android.

Developed and taught by well-known author and developer. At public venues or onsite at your location.

For live Android training, please see courses

at http://courses.coreservlets.com/.

Taught by the author of Core Servlets and JSP, More

Servlets and JSP, and this Android tutorial. Available at

public venues, or customized versions can be held

on-site at your organization.

• Courses developed and taught by Marty Hall

– JSF 2, PrimeFaces, servlets/JSP, Ajax, jQuery, Android development, Java 6 or 7 programming, custom mix of topics

– Ajax courses can concentrate on 1 library (jQuery, Prototype/Scriptaculous, Ext-JS, Dojo, etc.) or survey several

• Courses developed and taught by coreservlets.com experts (edited by Marty)

– Spring, Hibernate/JPA, EJB3, GWT, Hadoop, SOAP-based and RESTful Web Services

Contact hall@coreservlets.com for details

Topics in This Section

• Part I

– Invoking Activities by class name

– Defining dimensions in res/values

– Sending data via the “extras” Bundle

• Part II

– Invoking Activities with a URI

– Sending data via parameters in the URI

• Part III

– Invoking Activities with tabbed windows

– Defining two-image icons in res/drawable

Customized Java EE Training: http://courses.coreservlets.com/

Java, JSF 2, PrimeFaces, Servlets, JSP, Ajax, jQuery, Spring, Hibernate, RESTful Web Services, Hadoop, Android.

Developed and taught by well-known author and developer. At public venues or onsite at your location.

Overview

Summary of Options

• Invoke Activity by class name (Part I)

– Exactly one Activity can match

– New Activity must be in same project as original

– Can send data via an “extras” Bundle

• Invoke Activity by URI (Part II)

– More than one Activity could match

– New Activity need not be in the same project as original

– Can send data via URI parameters or “extras” Bundle

• Switch Activities via tabs (Part III)

– Can use class name or URI to specify Activity

– New Activity must be in same project as original

– Can send data via URI parameters or “extras” Bundle

Customized Java EE Training: http://courses.coreservlets.com/

Java, JSF 2, PrimeFaces, Servlets, JSP, Ajax, jQuery, Spring, Hibernate, RESTful Web Services, Hadoop, Android.

Developed and taught by well-known author and developer. At public venues or onsite at your location.

Invoking Activities

with a URI

Summary

• Idea

– Supply a URI that indirectly refers to new Activity. The new Activity

registers as target for URIs of a certain form.

• The originating Activity and the new Activity need not be in the same project

• More than one Activity could match the URI.

– If so, Android will ask you which one to use.

• Syntax

– Java (original Activity)

Uri uri = Uri.parse("foo://bar.example.com/baz");

Intent intent = new Intent(Intent.ACTION_VIEW, uri);

startActivity(activityIntent);

– XML (AndroidManifest.xml)

<intent-filter>

</intent-filter>

Registering to Handle URIs

• Matching the URI itself

– Register for a scheme and a host

• Example URI

– loan://coreservlets.com/calc

• intent-filter entry

– <data android:scheme="loan" android:host="coreservlets.com" />

– Note that the “calc” part is arbitrary – just to make URL look better.

• Matching the data type

– Register for a MIME type

• Example URIs

– content:// (referring to that MIME type)

– file:// (referring to that MIME type)

– anything:// (the Intent can call setType to specify MIME type)

• intent-filter entry

– <data android:mimeType="some/type" />

– <data android:mimeType="something/*" />

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