Develop Reference

Android deep linking process is not working for all devices. How to fixed it for all android device?

I have implemented android deep link code in my app, and it works for some devices, but not for all.
The main problem is, when I open web url from my app its showing option for open this url (chorme and myApp), then, after complete the work of web pages, its not showing any option to back to my App again. But for some device its showing the option for back to my app.
I can't figure out what is the problem. I have tried so many solution from internet, but nothing can work. If anyone has any solution that works for all android device, please help.
Here is my Manifest code
<activity
android:name=".activity.SplashActivity"
android:exported="true"
tools:ignore="ExtraText">
<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.example.com"
android:scheme="https" />
<data
android:host="www.example.com"
android:scheme="http" />
<data
android:host="example.com"
android:scheme="https" />
<data
android:host="example.com"
android:scheme="http" />
<!-- note that the leading "/" is required for pathPrefix -->
</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="app"
android:scheme="example" />
</intent-filter>
//------------------------------------------//
</activity>

Deeplinking not working in google chrome android

I've implemented deep linking in my android application, and so far it is working fine when I type URL in the address bar in Opera and MozilaFirefox but somehow it's not working in google chrome and Samsung default browser.
As most people use google chrome as a default browser, so I want to know if there is any way to fix this issue?
below is my manifest code
<activity
android:name=".IntroActivity"
android:configChanges="orientation|keyboard|keyboardHidden|screenSize"
android:screenOrientation="portrait"
android:launchMode="singleTop"
android:windowSoftInputMode="stateHidden|adjustPan">
<!-- android:windowSoftInputMode="stateHidden|adjustResize" -->
<!-- android:windowSoftInputMode="stateHidden|adjustPan" -->
<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="myapplication" />
</intent-filter>
</activity>

How to open an app directly from deeplink if app is installed already?

I want to open app directly without giving propmt open with browser or open with app.
I followed some links on stackoverflow did exactly what they did but still no luck.
Please help to get it fixed.
<activity
android:name="com.zappfresh.android.Activity.login.SplashActivity"
android:label="Zappfresh"
android:launchMode="singleTask"
android:screenOrientation="portrait">
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:host="zappfresh.onelink.me"
android:pathPrefix="/T0HX"
android:scheme="https" />
</intent-filter>
</activity>

Android: NFC intents in library that main project depends on

I am new to Android development...
I have an application which uses a library to upload data to a website. I want to make additions to the application to be able to read NFC tags.
I started out creating a small, separate application to get the hang of NFC. That app works fine. Now, I need to bring in some of that code into this other application which depends on the aforementioned library.
The problem is, UNLESS I add an application node to the AndroidManifest.xml in the LIBRARY specifying the NFC intents, the intents do not fire.
[Snippet from library manifest mentioned above]
<application
android:supportsRtl="true"
android:allowBackup="true">
<activity
android:name=".MainActivity"
android:label="My App..."
android:supportsRtl="true">
<intent-filter>
<action android:name="android.nfc.action.TAG_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
<intent-filter>
<action android:name="android.nfc.action.NDEF_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
<intent-filter>
<action android:name="android.nfc.action.TECH_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
[The main application contains this application node in its manifest]
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.microsoft.azure.storage.samples.MainActivity"
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>
<action android:name="android.nfc.action.TECH_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
<intent-filter>
<action android:name="android.nfc.action.TAG_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
<intent-filter>
<action android:name="android.nfc.action.NDEF_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
<meta-data
android:name="android.nfc.action.TECH_DISCOVERED"
android:resource="#xml/nfc_tech_filter" />
</activity>
</application>
Now comes the problem.... when a tag is detected, android tries to launch the activity from the library manifest file. Since that activity doesn't exist, I get a ClassNotFoundException. I tried specifying MainActivity class from the application for the android:name of the application node in the LIBRARY manifest, but:
I can't compile the code.
It would be extremely poor practice even if that worked...
How do I get the NFC intents to fire without having to add intent-filter nodes in the library manifest?
Thank you!

Multiple Same Apps and Deep Linking

I have implemented deep linking in my app. I added this intent filter in my manifest file, and the deep linking is working fine.
<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.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
<data
android:host="xxxxxxxx"
android:scheme="xxxxxxxx" />
</intent-filter>
The problem is that through deep linking, when i click on my App, it is showing similiar kinds of apps.
It is happening when Open by DEFAULT is not set
But when the open by default is set then everything is working fine.

Try this way ..
Suppose when user call http://example.com that time my Mainactivity open then all required attribute define inside mainactivity.
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name = ".MainActivity" >
<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="example.com"/>
</intent-filter>