Develop Reference

How to get Dynamic Url from firebase

We are not access share url from firebase using "https://firebase.google.com/docs/dynamic-links/android/receive"
FirebaseDynamicLinks.getInstance()
.getDynamicLink(getIntent())
.addOnSuccessListener(this, new OnSuccessListener<PendingDynamicLinkData>() {
#Override
public void onSuccess(PendingDynamicLinkData pendingDynamicLinkData) {
// Get deep link from result (may be null if no link is found)
Uri deepLink = null;
if (pendingDynamicLinkData != null) {
deepLink = pendingDynamicLinkData.getLink();
Log.e("deepLink",""+deepLink.toString());
}
// Handle the deep link. For example, open the linked
// content, or apply promotional credit to the user's
// account.
// ...
// ...
}
})
.addOnFailureListener(this, new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Log.w(TAG, "getDynamicLink:onFailure", e);
}
});
this method of firebase is allways return null in "onSuccess".

first you need to make sure you URI is formulated like
https://your_subdomain.page.link/?link=your_deep_link&apn=package_name[&amv=minimum_version][&afl=fallback_link]
method getDynamicLink returns null if a dynamic link is not previously captured or is in the Uri, the above link format is not necessarily to be like that but it should match to the intent filters you have previously defined.
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme" >
<activity android:name=".EntryChoiceActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".java.MainActivity"
android:exported="true">
<!-- [START link_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="link"
android:scheme="your_subdomain.page.link"/>
</intent-filter>
</activity>
</application>
</manifest>
also you should add query parameters to the link field in the firebase console, https://your_subdomain.page.link/?link=your_deep_link&apn=package_name[&amv=minimum_version][&afl=fallback_link] and deep link remain short https://your_subdomain.page.link/example now to reproduce an adb test for a intent filters like:
<activity
android:name=".ui.activities.MyActivity"
android:label="#string/title_activity"
android:screenOrientation="portrait">
<!-- ATTENTION: This intent was auto-generated. Follow instructions at
https://g.co/AppIndexing/AndroidStudio to publish your Android app deep links. -->
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<!-- ATTENTION: This data URL was auto-generated. We recommend that you use the HTTP scheme.
TODO: Change the host or pathPrefix as necessary. -->
<data
android:host="link"
android:scheme="your_subdomain.page.link" />
</intent-filter>
</activity>
use:
adb shell am start -W -a android.intent.action.VIEW -d "your_subdomain.page.link://link?key=category_parent_id\&value=92\&title=test" com.app_name.android
Hope this help thanks.

Android Deeplink opens application twice

i used webview to create app and implemented deep linking like this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ariagp.myapplication">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<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="https" android:host="mysitename.com" />
</intent-filter>
</activity>
</application>
</manifest>
it will asking my for open with my application before open the links, but the problem is:
two applications will open in the phone task manager (the application does not open in the previous application which is running):
what is the solution?

Add android:launchMode="singleTask" in declared activity in AndroidManifest.xml.
And then, in your activity, you should override onNewIntent() method and you will get arguments there.

Ok, so you don't actually have a problem here.
This is just how deep links work. If you open one in a certain app, the deep link will open your app but in the same window the deep link was originally in.
Your app will have two instances in a way.
You could go to you web brower app and click share and any app that pops up. They all open in the web browsing app window. So there is nothing to worry about. I had the same problem myself before I realised that it is just how things work.
Some apps are just verified to open other apps if they implement the browsability.

Add android:launchMode="singleTask" in declared activity in AndroidManifest.xml.
And then, in your activity, you should override onNewIntent() method and call mNavController.handleDeepLink(intent) there.
It is worth mentioning that you are now able to get your arguments using, private val args: XFragmentArgs by navArgs()in your fragment.

Android App Won't Remember USB Permission

I am trying to stop the app I am working on from asking for USB permissions each time the USB device is disconnected. I have followed: USB device access pop-up suppression? without much luck.
The app does remember the USB device until the device is unplugged.
If it matters I am trying to connect the app to an Arduino Teensy.
This is what my manifest activity looks like
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter> <!-- For receiving data from another application -->
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
<intent-filter>
<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"/>
</intent-filter>
<meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="#xml/usb_device_filter" />
</activity>
</application>
And here is my usb_device_filter file:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<usb-device vendor-id="--hidden--" product-id="--hidden--" />
</resources>
Any help is welcome.
EDIT: I also look over at the Android Developer page and they say when using an intent filter for USB connections: If users accept, your application automatically has permission to access the device until the device is disconnected.
I would also like to point out that the suggested duplicate does not have the same issue as I am trying to solve. Their problem is having two activities while my problem deals with just one.
https://developer.android.com/guide/topics/connectivity/usb/host

We ended up opening the app automatically when the USB is inserted into the phone, because our project deals with the app being open all day.
The app only asks for permission to use the USB once for the phone and remembers it now, as long as the user connects the USB before opening the app and the phone is unlocked. The phone even remembers the permission after the phone is restarted.
This is kind of a work around, but it works for our needs. Hopefully this will help some others with the same problem.

As the asker here says, For your perpose (if I understood correctly) the following should be enough. That's right that he had a different problem but he started hes question saying that for your case it's working.
<activity android:name=".FirstActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
</intent-filter>
<meta-data
android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
android:resource="#xml/usb_device_filter" />
</activity>

Google Map cannot start

01-19 20:30:59.245 18242-18242/kianyang.scbg E/GMPM: GoogleService failed to initialize, status: 10, Missing an expected resource: 'R.string.google_app_id' for initializing Google services. Possible causes are missing google-services.json or com.google.gms.google-services gradle plugin.
01-19 20:30:59.245 18242-18242/kianyang.scbg E/GMPM: Scheduler not set. Not logging error/warn.
01-19 20:30:59.295 18242-18290/kianyang.scbg E/GMPM: Uploading is not possible. App measurement disabled
My code compiles successfully. But Google Maps cannot start. What is the problem? This error shows up when I try to compile. But the compile is fine, it just cannot start Google Maps.
MapsActivity.java
package kianyang.scbg;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapsActivity extends FragmentActivity{
private GoogleMap mMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
setUpMapIfNeeded();
}
#Override
protected void onResume(){
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded(){
if(mMap==null){
mMap=((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
if(mMap!=null){
setUpMap();
}
}
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
private void setUpMap(){
mMap.addMarker(new MarkerOptions().position(new LatLng(2.215035, 102.245443)).title("Marker"));
}
}
Here is my manifest file. There is another intent inside it; just ignore it. Please help checking the Google Maps code.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="kianyang.scbg">
<permission
android:name="kianyang.scbg.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<user-permission android:name="kianyang.scbg.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme">
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyAljcGmDttsvHZjgpjFlsrsSfjTc6D9lkM" />
<activity
android:name=".Home"
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=".Searchactivity"
android:label="#string/title_activity_searchactivity">
<intent-filter>
<action android:name="kianyang.scbg.Searchactivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Vendoractivity"
android:label="#string/title_activity_vendoractivity">
<intent-filter>
<action android:name="kianyang.scbg.Vendoractivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Cartactivity"
android:label="#string/title_activity_cartactivity">
<intent-filter>
<action android:name="kianyang.scbg.Cartactivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Loginactivity"
android:label="#string/title_activity_loginactivity">
<intent-filter>
<action android:name="kianyang.scbg.Loginactivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Signupactivity"
android:label="#string/title_activity_signupactivity">
<intent-filter>
<action android:name="kianyang.scbg.Signupactivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".save_info_layout"
android:label="#string/title_activity_save_info_layout" />
<activity android:name=".DisplayProduct" />
<intent-filter>
<action android:name="kianyang.scbg.Locationactivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version"/>
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="#string/google_maps_key" />
<activity
android:name=".MapsActivity"
android:label="#string/title_activity_maps"></activity>
</application>
</manifest>

You seem to be missing the Google Maps API key in your .XML file (this allows you to access the google servers). The dev blog for setting up maps for android is Here, step #4 describes how to acquire a key.

For this error you may be missing either the google-services.json which you can get in this link or you are missing the proper plugin com.google.gms.google-services. Check the build.gradle file if you have this line compile com.google.android.gms:play-services:8.4.0(8.4.0 is the latest version but it can be 8.3.0 or lower). If not, you can download it through SDK Manager.
Note: You need SD card if you will use com.google.android.gms:play-services:8.4.0 for further explanation, see this link.

Creating a new Activity, makes a whole new application?

Im new to android, and when i read "Create New Activity" i was under the impression it creates a new "Window/Layout/Screen".
When i start making my own application i see
Main.java
is one application and
SecondActivity.java
is another app in my Emulators menu?
Why is that and how can i go about making one app with multiple windows as apposed to multiple applications essentially?
Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ryan.bidorbuyapp" >
<application
android:allowBackup="true"
android:icon="#mipmap/bidorbuy_logo"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".FullscreenActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="#string/app_name"
android:theme="#style/FullscreenTheme" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SearchResults"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="#string/title_activity_search_results"
android:parentActivityName=".FullscreenActivity"
android:theme="#style/FullscreenTheme" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.ryan.bidorbuyapp.FullscreenActivity" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
thanks

Look at your AndroidManifest.xml there is the problem. Your activities have Launcher between it's tags. Only one activity must have LAUNCHER tag
Only one activity must have
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>

You should understand what is an Activity before starting to developing an android application. You can think an activity as a page in web. There can be one or more and every activity includes their own contents.
When you create a new activity in your project, you should navigate by doing some operations in another activity. Intent helps you at this point to navigate one activity to the another.
Your problem is that, you should check your AndroidManifest.xml file. Please check the declaration of intent here. I think you will solve it after making a search about Intent.