Android: IntentFilters for components - android

What is a reasonable way to filter out specific cmp Strings with an Android IntentFilters which are declared in code in broadcast Receivers (rather than in android.xml)?
The case I'm searching for has:
action = android.intent.action.MAIN
category = android.intent.category.LAUNCHER
Any advice would be greatly appreciated.

I do a positive test for stuff I'm interested in and ignore everything that doesn't conform, as opposed to negatively trying to throw away all possible non-interesting things and keeping what's left. But maybe I've misunderstood your problem.

The issue was the intent filter only works over the application in which it occurs. This meant MAIN and LAUNCHER wasn't finding anything except for application relaunch events which weren't actually occurring. The system freeze up was caused by a separate error on the phone, not by the FILTER actually processing over too much information.
Still not sure how to search within an app by cmp or Component but the bigger issue was not finding stuff outside the application and that has alternative approaches.

Related

Android: intent started, but which parameters to pass?

I want to add support for several navigation applications in my app. I know how to start another activity as intent and pass parameters - but is there any way to check the naming of the parameters I should pass? For example: Navigon should start with routing calculation and instructions immediately after starting from within my application. So far, I'm not even sure Navigon supports parameter passing, but I don't even know how to figure that out.
Thanks in advance!
You should check the documentation for each app you're interested in supporting. They should have it laid out somewhere. If they don't, they might not support explicit intent extras.
For example, Navigon has their options laid out here(found by searching "android navigon intent"):
http://www.navigon.com/portal/common/faq/files/online_documents/NAVIGON_Android_public_Intent.pdf

Who manages interlal application intents?

I was studying some sample examples for Android and one of them got me really curious:
the NoteList (or Notepad) example application - here
My question is: Is there any way to make a NoteList shortcut, that always starts the application with its 'Editor' activity, for example. [of course if the creator of that 'third-party' application intended to make it possible by describing the entry points of its application in a proper way in the manifest file. I do not intent to create malware.]
in other words:
Can a third-party application (like the one I wish to make :) ) to get to internal application intents {i.e. action, activity, data} or this is handled by Android and no one else?
What gave the idea that this is possible was the following case:
I opened NoteList, created a few note, and when I was editing the title of one of the notes - I pressed HOME, when I clicked on the icon of NoteList I got the exact same state of the application - editing the title of the note.
thanks!
One has nothing to do with the other. That means that reopen an activity which was paused or killed with a data restoring logic just restores the last state. This is what happened in your example.
Now what you mean I guess is if there is a way to tell Android that you application can do a certain thing thus it should be shown as an option in the action chooser. Yes that is possible through intent filters.
The Intent reference page might also be very informative for you.

Get event on launching the native application

1 . can we get any event when user tap/touch native application(i.e. messaging,contacts).
2 . i know that any application launch by intent in android, there is any way to know which application launch with launch of application.
Thanks
No, We can not get any event directly or by any receiver.
what I have figured it that it can not be done directly......
But there are two work around for this :
Start a service that will check top-activity always by this way can know what activity got launched and do whatever you do under this condition.
Catch the logcat, read the line, and you can easily get what event what even took place, and by using your required filters you can even do whatever you like :)
can we get any event when user
tap/touch native application(i.e.
messaging,contacts).
Not generally. Most of these icons are tied to their applications.
there is any way to know which application launch with launch of application.
This makes no sense to me, sorry.
I am agree with #K_Rapid's answer..
Check code of AppLocker
I hope you will got solution from that code...
For (1): what do you mean by 'tap/touch'? Do you mean when the built-in applications are launched, or when they're interacted with?
If you mean launching, you can listen to any intents being fired by the system by registering a broadcast receiver. If you set your IntentFilter to receive intents with CATEGORY_LAUNCHER, you should be able to see when the launcher starts applications.
See:
http://developer.android.com/reference/android/content/Intent.html#CATEGORY_LAUNCHER
http://developer.android.com/reference/android/content/BroadcastReceiver.html
If you mean interacting, I don't think you can do that.
For (2): I don't believe that intents remember where they were constructed, so I don't think this is possible. I could be wrong, however.

Listing an application's activity and intent-filters?

I am interested in activating another application's activity. I know from reading the Android SDK that it's probably better to do this with an implicit intent. However, this activity doesn't reside in an application I own, so I don't know the action and category and data flags on the intent-filter.
How can I examine an Android applications metadata like the activity classes and the intent-filters for those activities (if declared in the manifest)?
Thanks!
I would try this.
Check on openintents
Contact the developer.
Use android-apktool too see the app's manifest.
It might be illegal to use android-apktool. Use it under your own risk.
There is one more solution: you could run this app and look into logcat. All intents are logged, so you could see what is called up. You won't see extra data though.

Listen to ActivityManager events?

is it possible somehow to listen to the events of the ActivityManager, e.g. when activities are started? Does the ActivityManager send broadcasts? I havn't found anything indicating that it does.
What I basically need to do: I want my app to launch one of my activities whenever a certain (thirdparty) app is launched/takes focus. Problem is this needs to happen before the thirdparty app is actually displayed.
What I have tried so far as workarounds:
Logcat output: I query logcat every 0.8s (filtered to show ActivityManager events only) but this eats up to many ressources
getRunningTasks: Slows down the phone a lot too and is not very safe, as an activity might be running but not currently in focus
Any ideas?
I suppose there is no actually other legacy way to handle glabal system state, only
(ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
ActivityManager.getRecentTasks() - Return a list of the tasks that are currently running, with the most recent being first and older ones after in order.
For details check docs
Perhaps though Android is a Linux you can run system tools like
Runtime.getRuntime().exec("ps -aux | grep smth")
But I think it would be hard to detect particular java application.
I think you can use the launch mode to determine which activity to launch to top level. Please check the question: Android singleTask or singleInstance launch mode?. Maybe it will help you.
I had a look in the android source, but there doesn't seem to be any events broadcasted.
https://android.googlesource.com/platform/packages/providers/ApplicationsProvider

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