Develop Reference

Intent filter with navigation component to Receiving image data from other app

My Android application uses the navigation component to navigate between fragments.
And the project only has a single Activity and all the others are fragments.
My application is a social media application. I want to share an image from my phone gallery with my application. When a user clicks the share button on the gallery, my application wants to show in the sharing dialogue.
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
</intent-filter>
I have used this intent filter on my main activity, and then the share dialogue displays my app.
But my requirement is, I want to get that image on my fragment. How to use this intent filter on my fragment.
Can I use the deep-link for that? but what value will give on the uri section?.
<deepLink
app:uri="android.intent.category.DEFAULT"
app:action="android.intent.action.SEND"
app:mimeType="image/*"
/>
I tried this. but not working.
In short, I want to receive the data (image) in my fragment. How can I achieve this using the Navigation component?

To explain why it's not working for you, let's examine this piece of code,
app:uri="android.intent.category.DEFAULT"
app:action="android.intent.action.SEND"
app:mimeType="image/*"/>
app:uri attribute requires a scheme and a host e.g., https://example.com (it could be any made up uri like myapp://example.com) , but you are passing a category string to it.
To fix this, just pass "myapp://example.com" or any made up uri you can think of. That will work. Now, the important bit - you must add deeplink tag to the fragment which receives the image. Now, your code will work, however, if your application is already running, it will not receive the image from shared intent. For that, you need to override onNewIntent method in you activity and call NavController.handleDeepLink(intent), you have to pass the intent received in onNewIntent method to it, followed by a call to super.onNewIntent(). Now, your app can receive image from any application that can share it, whether your application is already running, or started by the intent itself.

Which intent-filter scheme use for Youtube in Android

I want to register an intent-filter exclusively for the share in the Youtube app.
So far I'm able to receive the intent from Youtube successfully. The problem is my intent filer is not specific enough. My app is displayed as available for other share features in other apps (not only for Youtube).
This is what I'm using right now:
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
I have reviewed several questions (most are much like this one) the problem is there is an inaccuracy in those types of answers:
<data android:host="www.youtube.com" ... />
According to the data documentation the scheme most be provided in order for the host to be valid. So in those answers simply adding the host, doesn't make the intent-filter specific for Youtube, because there is no scheme, therefore, the host is ignored.
So I have been trying to figure this out by using the available methods of the intent when the Activity is started:
Intent intent = getIntent();
Bundle bundle = intent.getExtras();
for (String key : bundle.keySet()) {
Log.d("KEY", key);
}
//The above loop will log
//... D/KEY: android.intent.extra.SUBJECT
//... D/KEY: android.intent.extra.TEXT
//This is are the same keys than above, but using the available constants
String subject = getIntent().getStringExtra(Intent.EXTRA_SUBJECT);
String text = getIntent().getStringExtra(Intent.EXTRA_TEXT);
//The subject is the video title
Log.d("SUBJECT", subject);
//The text is the video url, example: https://youtu.be/p6qX_lg4wTc
Log.d("TEXT", text);
//Action is consistent with the intent-filter android.intent.action.SEND
Log.d("ACTION", intent.getAction());
//This is consistent with the intent-filter data mime type text/plain
Log.d("TYPE", intent.getType());
/*
This is the problem.
The scheme is null (that is why I'm using String value of).
*/
Log.d("scheme", String.valueOf(intent.getScheme()));
So, when the available information in the intent is checked, everything seems to be in order, but not the scheme. So, based on what is gotten, I have done some blind attempts to figure it out:
<data android:scheme="http" android:mimeType="text/plain"/>
//I'm adding youtu.be here because is the url format in the text extra
<data android:scheme="http" android:host="youtu.be" android:mimeType="text/plain"/>
Adding http or https won't work, it makes the app is no longer available in the chooser. This means it will neither work the other attempt adding the host.
Doe's anybody knows how to create an intent-filter exclusively for Youtube share?
PS: I know I could validate the url to see if it match a Youtube url, but having my app in every chooser matching SEND doesn't seem user friendly

tldr: You can't make an intent-filter exclusively for Youtube app, the intent for sharing a video doesn't have anything to narrow it down.
So I got really obsessed about this, the only way to find out seems to check the Youtube app code. I found the apk here and then decompile with this. I think I found the code in this file (the text error seems to confirm my finding).
So, if my deductions are correct, then what is going on is Youtube app make an intent with no scheme or nothing else to make it specific. It only uses SEND.

This not answer your specific question, but I think achieves the same you want.
You can use the youtube android player api library and the YouTubeIntents
Like this:
Intent youtubeIntent =
YouTubeIntents.createPlayVideoIntent(getApplicationContext(), VIDEO_ID);
startActivity(youtubeIntent);

Open App for Specifc link in browser

I want to open my Android app for a specific link not for the specific host so that whenever user types the url in browser my app should be shown in Open With options.
I have already got success in opening my app from browser link.
For e.g:
If user types: www.abc.com app must not be shown in Open with options. But if user types or clicks www.abc.com/video app must be shown.
I have tried diffrent combination of following but none of them works.
<data android:pathPrefix="www.abc.com"
android:pathPattern=".*"
android:pathPrefix="/video/" android:scheme="http" />
It shows me my app even if I have typed abc.com in web browser. But what i want is that my application should only be visible if the user typed exact url i.e. www.abc.com/video

From Android docs:
Each of these attributes is optional, but they are not independent of each other: For an authority to be meaningful, a scheme must also be specified. For a path to be meaningful, both a scheme and an authority must be specified.
Then you should use:
android:scheme="http" android:host="www.abc.com" android:path="/video"

What i Understands after applying all the combinations of
<data android:pathPrefix="www.abc.com" android:pathPattern=".*" android:pathPrefix="/video/" android:scheme="http" />
is that:
1.) Browser throws intent for the url part before the /(slash) operator. For e.g:
If I write www.abc.com/terms, Browser will throw intent for www.abc.com. similary It will also check for www.abc.com/videos, www.abc.com/xyz, abc.com/, abc.com/videos and throws intent.
Now, Its our responsiblity to check other params in the incoming url and provide checks for the url we want to handle.
In my case, I have added check for second parameter videos if it contains, else show the home screen for the app.

Dynamically associate file type with my application

i have an application which associates pdf files in my Manifest(via intent-filters), so when someone click on pdf link in the default browser i can execute that action with my app and download it with a progressbar. my question is, is it a way that i can associate other files but not "hard coded" in my manifest, but to let the user choose(or write) that file extention in preferences for example and i can add it dynamically from code. i know that probably this can be done with broadcast receiver but cant find any examples or simple code for that matter. ive seen preference menu like that in bsplayer settings .. but cant post image cuz dont have enough reputation.
I will try to explain more detailed my problem, because i think that there was some misunderstanding with the answer below.
i have an application which have the fallowing code in my manifest.
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="http" />
<data android:host="*" />
<data android:pathPattern=".*\\.pdf" />
</intent-filter>
2.i launch my app which registers .pdf files with it. so next time i click on pdf link in my browser, a window pops up, making me choose with what application should i complete that action. if i choose my application, my main activity is launched, in which i use getIntent() and my app downloads the file using progressbar.
3.the problem is that i want to download and other files like that ie. jpg, png .. etc, but giving the user a choice which ones, or even making him write the extentions for the files he wants to download using my application if clicks on link somewhere that leads to that kind of files.
4.to make this thing happen, file extensions should be added dynamically in code somewow and not in manifest. i was looking some examples for broadcast receiver, since that class can use IntentFilter class, but cant really understand what i should be doing with it.
5.My main goal: starting my app, there is layout with some spinner or edit box. the user choose/writes some extension (.dwf). that extension is now registered with my app. if the next time the user browsing internet clicks on link which leads to .dwf file he could choose to continue the action with my app. and the file should be downloaded just like the .pdf
6.sry for my bad english and some help will be appreciated. also code ;)

boolean enabled=prefs.getBoolean(key, false);
int flag=(enabled ?
PackageManager.COMPONENT_ENABLED_STATE_ENABLED :
PackageManager.COMPONENT_ENABLED_STATE_DISABLED);
ComponentName component=new ComponentName(MyActivity.this, TargetActivity.class);
getPackageManager()
.setComponentEnabledSetting(component, flag,
PackageManager.DONT_KILL_APP);
Depending upon your preference you can Disable the activity that handles the File type in your BOOT_COMPLETED Reciever. I Believe you will have to have different activities to handle different file types and then disable selectively

using android dialer in 3rd party app

guys. I am trying to build a voip app for android. I want to make use of the built-in android phone dialer. Can you guys give me some reference to it. I have been googling with no luck. Thanks

What you need to do is setup an Intent filter on the Activity you want to make the call. You do this inside your AndroidManifest.xml file. Modify your activity definition to include this intent filter:
<intent-filter>
<action android:name="android.intent.action.CALL" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="tel" />
</intent-filter>
Note: there are some alternative ways to call people (which can be seeing in the AndroidManifest.xml of the source I linked bellow, however this is the main one
Adding this will give the user the option to use your app when making a call, and this can be set as the default app if the user wishes.
You can then get the phone number by adding something like this code to your onCreate() method of your activity:
final Intent i = getIntent();
final Uri phoneUri = i.getData();
phoneUri now contains tel:00000000000 and you can easily get the number out of the Uri object
If you have problems in to future take a look at the android source. I got these bits of code from the phone app source if you want to take a look.

This should open the dialer with new special permissions:
Intent i = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:0000000000"));
startActivity(i);
That should open the dialer with the required telephone number already inserted.