- You don't need multiple apps to test this. Just more than two activities, in any apps, matching the launched intent. - You this behavior in various places in the base system (for example clicking on a map link in the browser). - The standard chooser dialog (such as what is brought up when you select a "share" menu) is actually a form of this. - To see an example, just install a home screen replacer app. When you press home, an implicit intent to launch the home app is started, and at that point you will go into the intent resolver to select which home app you want. - Use Intent.FLAG_DEBUG_LOG_RESOLUTION to see debug information printed in the log while your intent is being resolved.
On Tue, Sep 7, 2010 at 8:37 AM, mani <smanikanda...@gmail.com> wrote: > Hi all, > > I am sorry that i may ask known questions to you all. But i couldnt > figure out the exact understanding of implicit intents. > > When i was going through the tutorial i read about it. > > here are some important points to remember: > 1 - Implicit Intents do not specify a target component > 2 - Components willing to receive implicit intents have to declare > their ability to handle a specific intent by declaring intent filters > 3 - A component can declare any number of Intent Filters > 4 - There can be more than one component that declares the same Intent > Filters and hence can respond to the same implicit intent. In that > case the user is presented both the component options and he can > choose which one he wants to continue with > 5- You can set priorities for the intent filters to ensure the order > of responses. > > I read this about Implicit Intents. > > I couldnt get visualisation of 4th point. So wanted to try it out by > writing some examples. > > I tested this like below. > Wrote two apps. > > I had written two activities in one app, CallingActivity & > anotherActivity. > > <manifest xmlns:android="http://schemas.android.com/apk/res/android"; > package="com.android.localguide"> > <application> > <activity class=".CallingActivity" > android:label="callingactivity"> > <intent-filter> > <action android:value="android.intent.action.MAIN" /> > <category > android:value="android.intent.category.LAUNCHER" /> > </intent-filter> > </activity> > <activity class=".anotherActivity" > android:label="anotheractivity"> > <intent-filter> > <action > android:value="com.android.localguide.GET_RESULT" /> > <category > android:value="android.intent.category.DEFAULT" /> > </intent-filter> > </activity> > > </application> > </manifest> > > One more app,which has two activities like below. > > <?xml version="1.0" encoding="utf-8"?> > <manifest xmlns:android="http://schemas.android.com/apk/res/android"; > package="com.android.test" > android:versionCode="1" > android:versionName="1.0"> > <application android:icon="@drawable/icon" android:label="@string/ > app_name"> > <activity android:name=".testmain" > android:label="@string/app_name"> > <intent-filter> > <action android:name="android.intent.action.MAIN" /> > <category > android:name="android.intent.category.LAUNCHER" /> > </intent-filter> > </activity> > <activity android:name=".results"> > <intent-filter> > <action android:name="com.android.localguide.GET_RESULT"/> > <category android:name="android.intent.category.DEFAULT"/> > </intent-filter> > </activity> > </application> > > > </manifest> > > I ran the first app in emulator and pressed home screen, it mean it > runs in the background.(Not exited ) > Then i opened the second app and clicked a button in frirst > activity(testmain) and tried to call setAction > "com.android.localguide.GET_RESULT" > > i.setAction("com.android.localguide.GET_RESULT"); > > But it is opening the activity "results".. It dint showed a options to > choose which components( i expected first app ) activity i need to > use ? > > Am i right in executing in the right context to understand that point > no 4 ? > > Could anyone please elloborate on that point ? > > thanks, > Mani > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com<android-developers%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- Dianne Hackborn Android framework engineer hack...@android.com Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
