Can I know if the user turn Off or turn On the phone? [Xamarin Forms Android]

Question

I need to know if in some moment the user turned off the phone and register it if that happens

Answer 1

Hello,

Can I know if the user turn Off or turn On the phone?

Yes. You can use **BroadCastReceiver**detect turn-on the Phone(Note: Please test following way in the physical device).

Step 1 Create a BroadCastReceiver like following code in your Xamarin Forms Android project.

   [BroadcastReceiver(Enabled = true, Exported = false)]  
       [IntentFilter(new[] { "android.intent.action.BOOT_COMPLETED" })]  
       public class DeviceTrunOnReceiver : BroadcastReceiver  
       {  
           public override void OnReceive(Context context, Intent intent)  
           {  
               Toast.MakeText(context, "Received intent!", ToastLength.Short).Show();  
           }  
       }  

Step 2: Register this broadcast in AndroidManifest.xml, and add RECEIVE_BOOT_COMPLETED permission.

   <!-- ... -->  
   <application android:label="App4.Android" android:theme="@style/MainTheme">  
   		<receiver android:name=".DeviceTrunOnReceiver" android:enabled="true"   
                           android:permission="android.permission.RECEIVE_BOOT_COMPLETED">  
   			<intent-filter>  
   				<action android:name="android.intent.action.BOOT_COMPLETED" />  
   				<category android:name="android.intent.category.DEFAULT" />  
   			</intent-filter>  
   		</receiver>  
   	</application>  
   <!-- Don't forget about permission -->  
   <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>  

Best Regards,
Leon Lu

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