Develop Reference

react native android ask camera permission when user first logs in

I'm not familiar with the react-native app permissions for android and ios. I'm in thihs project which needs camera and audio permissions for videocalls that are already implemented and work fine.
The thing is that currently these permissions are asked the first time the users enters a videocall and that causes delay and bugs on the videocall flow. I'd like to aks these permissions the first time the users opens the app (they enter first to their profile or the dashboard, the videocall part happens afterwards), like I've seen other apps do.
This is the androidManifest.xml file that handles the permissions. I looked for a way to change when they're asked but I couldn't find anything on the format I'm currently at, and since it's new to me I don't want to change the behaviour completely by accident.
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.rectnativetemplate">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<application
android:name=".MainApplication"
android:usesCleartextTraffic="true"
android:label="#string/app_name"
android:requestLegacyExternalStorage="true"
android:icon="#mipmap/ic_launcher"
android:roundIcon="#mipmap/ic_launcher_round"
android:allowBackup="false"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
android:launchMode="singleTask"
android:windowSoftInputMode="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:host="dev--b45llct.us.auth0.com"
android:pathPrefix="/android/${applicationId}/callback"
android:scheme="${applicationId}" />
</intent-filter>
</activity>
------------
<activity android:name="com.facebook.react.devsupport.DevSettingsActivity" />
</application>
</manifest>
Is there a way to ask the permissions when the user first enters the app? And if it's possible, how can I implement the same behaviour on IOS?

Use request from PermissionsAndroid.
const granted = await PermissionsAndroid.request(PermissionsAndroid.PERMISSIONS.CAMERA);
if (granted === PermissionsAndroid.RESULTS.GRANTED) {
console.log('Camera permission granted');
} else {
console.log('Camera permission denied');
}

React Native Deep Linking Application Not Opening

I followed all the steps from both the articles mentioned below
https://hackernoon.com/react-native-deep-linking-for-ios-and-android-d33abfba7ef3
https://medium.com/react-native-training/deep-linking-your-react-native-app-d87c39a1ad5e
After the app gets installed on my phone, I tried opening the app from the browser by giving the URL as peopleapp://people/1 format. Instead of opening the app, the browser opens Google search to search for the above.
I Used this application to open my Application by using my App Link(https://play.google.com/store/apps/details?id=com.manoj.dlt&hl=en_US) it's working.
But how to open the application from browser or from another application Using my App Link ?
Anyone has idea, how to solve this issue ?
Here is my Total AndroidManifest Code`
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:name=".MainApplication"
android:allowBackup="false"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme"
android:usesCleartextTraffic="true">
<activity
android:name=".MainActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
android:screenOrientation="portrait"
android:label="#string/app_name"
android:windowSoftInputMode="adjustResize"
android:launchMode="singleTask">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter android:label="filter_react_native">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="whizzard" android:host="article" />
</intent-filter>
</activity>
</application>
`
My Link is whizzard://article

As per google docs:
The functionality has changed slightly in Chrome for Android, versions 25 and later. It is no longer possible to launch an Android app by setting an iframe's src attribute. For example, navigating an iframe to a URI with a custom scheme such as paulsawesomeapp:// will not work even if the user has the appropriate app installed. Instead, you should implement a user gesture to launch the app via a custom scheme, or use the “intent:”.
You can read more about how intents work here. However, the tutorial you followed, for deeplinking will work on other browsers which are not chrome or chrome based.

Android file Webview Download

I am a novice and just to avoid running into difficulties, I created an app with a simple webview function that displays an external site, so that when I have to make a change, I go to the site and update the app as well.
The problem is that if I attach a file on the site (even a simple pdf) from the app it is not possible to download it despite having put the download permissions. Is there a way to "enable" all downloads from the app related to a site domain?
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_DOWNLOAD_MANAGER"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<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>
</activity>
</application>

It seems that you gave the correct permissions in your Manifest, so the issue must be in the Java code. Since you didn't attach it: you should have a webView.setDownloadListener() method. This question is really similar to yours and might be helpful:
Download file inside WebView
Please attach Java code for a more specific answer.

GCM notification is not receiving when app is killed( not force kill)

I am happily receiving notifications when app is in background and foreground but when app is killed, I am not receiving notifications in some phones (like Xiaomi model phones eg mi3, etc.)
GCM message 0:1434141725194227%03b66390f9fd7ecd
broadcast intent callback: result=CANCELLED forIntent { act=com.google.android.c2dm.intent.RECEIVE pkg= (has extras) }
Although I am getting notifications in other phones like nexus, samsung, others.
Did anyone also had similar problem?
Can someone explain me where I am wrong.
Here is my Manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="<package_name>">
<permission android:name="<package_name>.permission.C2D_MESSAGE" android:protectionLevel="signature"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="<package_name>.permission.C2D_MESSAGE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<action android:name="android.net.wifi.WIFI_STATE_CHANGED"/>
<action android:name="android.net.wifi.STATE_CHANGE"/>
<application
android:name="<package_name>.ApplicationSingleton"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme">
<activity
android:name="<package_name>.ui.activity.ReferralActivity"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="adjustResize">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name="<package_name>.gcm.GcmBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<category android:name="<package_name>" />
</intent-filter>
<intent-filter>
<action android:name="com.google.android.c2dm.intent.REGISTRATION"/>
<category android:name="<package_name>"/>
</intent-filter>
</receiver>
<service android:name="<package_name>.gcm.GcmIntentService" />
</activity>
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
</application>

Autostart probably the best MIUI feature that doesn’t come enabled by default, but should.
What does autostart do? It basically starts the apps you select when the phone starts, so you never miss any notifications or updates.
To enable autostart for your apps, follow the steps below:
Tap on the Security app from the app screen.
You will not find this if you enter from the Settings menu, you have to tap directly on the app icon.
Open Security App:
Once in the Security app, tap on Permissions.
Tap on Autostart
Toggle the apps you want to enable Autostart for
Reboot your phone.
Now you are all set up with autostart!

BackButton quit the application

I'm experiencing a trouble on my app, my backButton quit the application.
My application is a SyncService, everything seems to be great in the Manifest, i check for one day with no response...
I already check if the launchmode change something, i test the 4 and nothing append...
If someone can have a look on the manifest, it would be great :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.smile.android.ldapsync" android:versionCode="12" android:versionName="1.5">
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />
<uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.READ_SYNC_STATS" />
<uses-permission android:name="android.permission.READ_SYNC_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><application android:icon="#drawable/icon" android:label="#string/app_name" android:debuggable="true" android:enabled="true" android:persistent="true">
<service android:name="com.smile.android.ldapsync.authenticator.LDAPAuthenticationService" android:exported="true" android:debuggable="true">
<intent-filter>
<action android:name="android.accounts.AccountAuthenticator" />
</intent-filter>
<meta-data android:name="android.accounts.AccountAuthenticator" android:resource="#xml/authenticator" />
</service>
<service android:name="com.smile.android.ldapsync.syncadapter.SyncService" android:exported="true" android:debuggable="true">
<intent-filter>
<action android:name="android.content.SyncAdapter" />
</intent-filter>
<meta-data android:name="android.content.SyncAdapter" android:resource="#xml/syncadapter" />
</service>
<activity android:name="com.smile.android.ldapsync.authenticator.LDAPAuthenticatorActivity" android:label="#string/ui_activity_title" android:excludeFromRecents="true">
android:excludeFromRecents="true"
<!--
No intent-filter here! This activity is only ever launched by
someone who explicitly knows the class name
-->
</activity>
</application>
<uses-sdk android:minSdkVersion="5" />
</manifest>
Thank you ;)

Did you tried overriding onBackPressed ?
#Override
public void onBackPressed() {
return;
}

if you press back button while on the "main" activity (the first one you launched aka the bottom of your activity stack) the OS understand this as "the user is done and won't be back anytime soon" opposed as "home" button which is understood as "maybe the user wants to check something else before resuming the app"
So, if you DO NOT want your app to "terminate" (an android app terminates only when the OS kills it, otherwise it will lurk in memory until recalled) you need to override the back button pressed callback
public void onBackPressed()
which the api doc describes as:
"Called when the activity has detected the user's press of the back key. The default implementation simply finishes the current activity, but you can override this to do whatever you want."
You might just ignore the event and absorb it like timo schloesser suggested or you can do whatever is most appropriated (like, launching another activity or killing services before leaving the screen)
EDIT: you might also want to check the "moveTaskToBack" method inherited from Activity class. I have never used it but it might be useful to your problem.