www.openintents.org [email protected] Droidcon 2011 Berlin,24 March 2011
Hidden Treasure: Open Android Apps
Friedger Müffke
@fmdroid#openintents
No monoliths ..
but interconnectedcomponents
All apps are equal!
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
Intents
● Add „journey schedule“ to shopping list app
5 lines of code
● Add „book a table“ to calendar app
50 lines of code
● Add „AR browser“ to post office app
1 library + 25 lines of code
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
Intents
e.g. in Activity
Intent i = new Intent(„com.opentable.action.RESERVE“);i.setData(„reserve://opentable.com/45112?partySize=3“);
this.startActivity(i);this.startActivityForResult(i, RESCODE);this.startService(i);this.bindService(i, con, 0);this.sendBroadcast(i);
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
Manifest<?xml version="1.0" encoding="utf-8"?> <manifest . . . > <application . . . > <activity
android:name="org.openintents.shopping.ShoppingActivity" android:icon="@drawable/small_pic.png" android:label="@string/shopping" . . . >
<intent-filter> <action android:name="android.intent.action.VIEW" /> <action android:name="android.intent.action.INSERT" /> <category android:name="android.intent.category.DEFAULT" /> <data android:mimeType = "vnd.android.cursor.dir/vnd.openintents.shopping.item" /> </intent-filter> </activity>
<service . . ./> . . . <uses-permisson . . . /> <uses-library . . . /></application> </manifest>
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
Sending Result
● Called app:
getCallingActivity()
Intent reply = new Intent();reply.putExtra(„SCAN_RESULT“, value);reply.putExtra(„QUALITY“, quality);setResult(RESULT_OK, reply);finish();
● Calling app:
onActivityResult()
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
Open Apps
● Declare intent filters in your Manifest
with CATEGORY_DEFAULT● Publish your intent filters on your website and
open-android-apps.appspot.com
● Explore intents and which apps do offer the corresponding functionality
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
Study
● Analysize of apps in application store Appoke● ~1500 apps (paid + free)● 350 apps declare intent filter
other than launcher● Many wired and wrong intent filter● 1% of apps declare useful intent filter
Looking for more apps stores to participate!
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
Common use cases
● SEND, SEND_TO, SENDMULTIPLE
– Images, texts
– Blogs, SMS, ..
● VIEW– Images, text
– Websites (http scheme)
● Filemanager (start „best“ app for file)
● Theming and configuration
● SHOW_RADAR● RESERVE● CALIBRATE● AUTHENTICATE● HELP
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
Open Apps (2)
In the future
– Mark as inappropriate– Integration in dependency manager– Link to Intents Registry– Eclipse Integration
Google Summer Of Code 2011 – for students
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
Participate!
● Visit the Android Open Source Project (AOP)● OpenIntents repository at Google code● Android is open as are these issues
– Issue 4716: Support package dependency through uses-intent in Manifest
– Issue 3217: Support PackageManager.GET_INTENT_FILTERS
● Google Group appfeed
@fmdroid – Open Android Apps Droidcon 2011 Berlin, 24 March 2011
More infoWeb site:
www.openintents.orgDeveloper group: http://groups.google.com/group/openintents
Code repository: http://openintents.googlecode.com
