Develop Reference

I am creating a Browser App but Android won't detect my app in chooser while I click on any URL

I am creating a Browser app and I want Android to treat my app as a browser and show up in the app chooser to open with.
I want my app to show up in this list.
Here is my manifest Activity code:
<activity
android:name=".Activity.LinkDetectorActivity"
android:exported="true"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<data android:scheme="testscheme" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>

Replace your intent-filter with below,
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<data android:scheme="http"/>
<category android:name="android.intent.category.DEFAULT" />
<!-- The BROWSABLE category is required to get links from web
pages. -->
<category android:name="android.intent.category.BROWSABLE" />
</intent-filter>
</activity>

Try to change testcheme to "http" and "https"
<activity
android:name=".Activity.LinkDetectorActivity"
android:exported="true"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<data android:scheme="http" />
<data android:scheme="https" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>

Why do I have to separate the <intent-filter> to show the "open" button on google play?

I have an app on GooglePlay, but the Open button is missing. It just says Uninstall.
This is my mainfest.xml:
<application
android:name=".preview_refresh"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher_round"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".Login_Activity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:host="www.url.com"
android:path="/launch"
android:scheme="https" />
</intent-filter>
</activity>
</application>
I figured out, the problem is:
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
But I have these lines in my code. When I remove:
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:host="www.url.com"
android:path="/launch"
android:scheme="https" />
the open button is shown.
How can I fix it? I need these tags to open my app via link.
EDIT
I solved my problem, but now I have a new question:
Why do I have to separate the <intent-filter>? It's very confusing, because it shouldn't make any difference.

Ok, now I figured it out. The solution is to separate the <intent-filter>. Like this:
<activity android:name=".Login_Activity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:host="www.urlk.com"
android:path="/launch"
android:scheme="https" />
</intent-filter>
</activity>

How to open activity using Voice Interaction?

This is one of my activities in my Android Manifest.
<activity
android:name=".voice.VoiceAccountActivity"
android:label="Qnet Balance"
android:screenOrientation="portrait"
android:theme="#style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.VOICE" />
<data
android:host="qnet.balance"
android:scheme="https" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
I've read the Voice Interactions API but every time I say "Open Qnet Balance" it just shows me a bunch of search results from the web. The Browsable and the data qnet.balance I tried to use it as a way to open my app using voice by saying "Open qnet.balance" but that also failed. Anyone have a solution? I'm talking about calling these commands after doing "Ok Google"

Change intent filter tag. And do try to change label to one word it will work.
<activity android:name=".MainActivity" android:label="race">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.VOICE" />
<data
android:host="qnet.balance"
android:scheme="https" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
It opens only launcher activity. I hope this will work

adding deep linking data to the MainActivity intent-filter removes the icon in the device

I'm trying to add deep linking to my app and when I add:
<data android:scheme="http"
android:host="www.example.com"
android:pathPrefix="/gizmos" />
to the intent filter in my MainActivity the icon is not installed in the device after compiling.
Here is the activity part on the manifest:
<activity
android:name=".MainActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:windowSoftInputMode="adjustPan"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http"
android:host="www.example.com"
android:pathPrefix="/gizmos" />
</intent-filter>
</activity>

You need two separate intent-filter.
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http"
android:host="www.xxx.com"
android:pathPrefix="/app" />
</intent-filter>

Docs say:
When you want to handle multiple kinds of intents, but only in
specific combinations of action, data, and category type, then you
need to create multiple intent filters.
So, you should define multiple intent-filters so that each of which will handle a separate concern.
One for MAIN / LAUNCHER. (Showing icon of your app in the launcher)
One for VIEW / BROWSEABLE.

Android: App does not appear in drawer when mimeType is set

I have an Activity that is both the MainActivity and the activity that should be started when the 'Share'-Button within the Gallery is clicked.
So my Manifest looks like this:
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
<category android:name="android.intent.category.LAUNCHER" />
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.SEND" />
</intent-filter>
</activity>
With the above manifest, by app appears within the share menu but not in the app drawer. If I remove the line that sets the mimeType the app appears in the app drawer but not within the share menu in the gallery.
Any suggestions how to achieve both?
Thanks in advance.

Use two separate <intent-filter> elements in the <activity>: one for MAIN/LAUNCHER, the other for SEND/DEFAULT/MIME type.
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<category android:name="android.intent.category.LAUNCHER" />
<action android:name="android.intent.action.MAIN" />
</intent-filter>
<intent-filter>
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
<action android:name="android.intent.action.SEND" />
</intent-filter>
</activity>