Use ContextCompat.getSystemService() to retrieve system services without casting.

src/org/kde/kdeconnect/BackgroundService.java

@@ -37,6 +37,7 @@ import android.text.TextUtils;
 import android.util.Log;
 
 import androidx.core.app.NotificationCompat;
+import androidx.core.content.ContextCompat;
 
 import org.kde.kdeconnect.Backends.BaseLink;
 import org.kde.kdeconnect.Backends.BaseLinkProvider;
@@ -141,7 +142,7 @@ public class BackgroundService extends Service {
 
         if (NotificationHelper.isPersistentNotificationEnabled(this)) {
             //Update the foreground notification with the currently connected device list
-            NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+            NotificationManager nm = ContextCompat.getSystemService(this, NotificationManager.class);
             nm.notify(FOREGROUND_NOTIFICATION_ID, createForegroundNotification());
         }
     }
@@ -316,7 +317,7 @@ public class BackgroundService extends Service {
     }
 
     public void changePersistentNotificationVisibility(boolean visible) {
-        NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+        NotificationManager nm = ContextCompat.getSystemService(this, NotificationManager.class);
         if (visible) {
             nm.notify(FOREGROUND_NOTIFICATION_ID, createForegroundNotification());
         } else {

src/org/kde/kdeconnect/Device.java

@@ -396,7 +396,7 @@ public class Device implements BaseLink.PacketReceiver {
 
         Resources res = getContext().getResources();
 
-        final NotificationManager notificationManager = (NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE);
+        final NotificationManager notificationManager = ContextCompat.getSystemService(getContext(), NotificationManager.class);
 
         Notification noti = new NotificationCompat.Builder(getContext(), NotificationHelper.Channels.DEFAULT)
                 .setContentTitle(res.getString(R.string.pairing_request_from, getName()))
@@ -414,7 +414,8 @@ public class Device implements BaseLink.PacketReceiver {
     }
 
     public void hidePairingNotification() {
-        final NotificationManager notificationManager = (NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE);
+        final NotificationManager notificationManager = ContextCompat.getSystemService(getContext(),
+                NotificationManager.class);
         notificationManager.cancel(notificationId);
     }
 

src/org/kde/kdeconnect/Helpers/NotificationHelper.java

@@ -8,6 +8,8 @@ import android.content.SharedPreferences;
 import android.os.Build;
 import android.preference.PreferenceManager;
 
+import androidx.core.content.ContextCompat;
+
 import org.kde.kdeconnect_tp.R;
 
 public class NotificationHelper {
@@ -45,7 +47,7 @@ public class NotificationHelper {
             return;
         }
 
-        NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        NotificationManager manager = ContextCompat.getSystemService(context, NotificationManager.class);
 
         NotificationChannel persistentChannel = new NotificationChannel(
                 Channels.PERSISTENT,

src/org/kde/kdeconnect/Helpers/TelephonyHelper.java

@@ -31,6 +31,7 @@ import android.util.Log;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
+import androidx.core.content.ContextCompat;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -48,7 +49,8 @@ public class TelephonyHelper {
     public static List<Integer> getActiveSubscriptionIDs(
             @NonNull Context context)
             throws SecurityException {
-        SubscriptionManager subscriptionManager = (SubscriptionManager) context.getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE);
+        SubscriptionManager subscriptionManager = ContextCompat.getSystemService(context,
+                SubscriptionManager.class);
         if (subscriptionManager == null) {
             // I don't know why or when this happens...
             Log.w(LOGGING_TAG, "Could not get SubscriptionManager");
@@ -79,7 +81,8 @@ public class TelephonyHelper {
             // See: https://developer.android.com/about/versions/android-5.1.html#multisim
             // There were vendor-specific implmentations before then, but those are very difficult to support
             // S/O Reference: https://stackoverflow.com/a/28571835/3723163
-            TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
+            TelephonyManager telephonyManager = ContextCompat.getSystemService(context,
+                    TelephonyManager.class);
             if (telephonyManager == null) {
                 // I don't know why or when this happens...
                 Log.w(LOGGING_TAG, "Could not get TelephonyManager");
@@ -89,7 +92,8 @@ public class TelephonyHelper {
             return Collections.singletonList(phoneNumber);
         } else {
             // Potentially multi-sim case
-            SubscriptionManager subscriptionManager = (SubscriptionManager)context.getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE);
+            SubscriptionManager subscriptionManager = ContextCompat.getSystemService(context,
+                    SubscriptionManager.class);
             if (subscriptionManager == null) {
                 // I don't know why or when this happens...
                 Log.w(LOGGING_TAG, "Could not get SubscriptionManager");

src/org/kde/kdeconnect/Helpers/TrustedNetworkHelper.java

@@ -1,9 +1,5 @@
 package org.kde.kdeconnect.Helpers;
 
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
-
 import android.Manifest;
 import android.content.Context;
 import android.content.pm.PackageManager;
@@ -12,12 +8,12 @@ import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 import android.preference.PreferenceManager;
 import android.text.TextUtils;
-import android.util.Log;
 
 import androidx.core.content.ContextCompat;
 
-import org.kde.kdeconnect.UserInterface.PermissionsAlertDialogFragment;
+import java.util.Arrays;
-import org.kde.kdeconnect_tp.R;
+import java.util.Collections;
+import java.util.List;
 
 public class TrustedNetworkHelper {
 
@@ -70,7 +66,8 @@ public class TrustedNetworkHelper {
     }
 
     public String currentSSID() {
-        WifiManager wifiManager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
+        WifiManager wifiManager = ContextCompat.getSystemService(context.getApplicationContext(),
+                WifiManager.class);
         if (wifiManager == null) return "";
         WifiInfo wifiInfo = wifiManager.getConnectionInfo();
         if (wifiInfo.getSupplicantState() != SupplicantState.COMPLETED) {

src/org/kde/kdeconnect/Plugins/ClibpoardPlugin/ClipboardFloatingActivity.java

@@ -20,15 +20,15 @@
 
 package org.kde.kdeconnect.Plugins.ClibpoardPlugin;
 
-import androidx.appcompat.app.AppCompatActivity;
-
 import android.content.ClipData;
 import android.content.ClipboardManager;
-import android.content.Context;
 import android.os.Bundle;
 import android.view.WindowManager;
 import android.widget.Toast;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.content.ContextCompat;
+
 import org.kde.kdeconnect.BackgroundService;
 import org.kde.kdeconnect.Device;
 import org.kde.kdeconnect_tp.R;
@@ -56,7 +56,8 @@ public class ClipboardFloatingActivity extends AppCompatActivity {
         super.onWindowFocusChanged(hasFocus);
         if (hasFocus) {
             // We are now sure that clipboard can be accessed from here.
-            ClipboardManager clipboardManager = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
+            ClipboardManager clipboardManager = ContextCompat.getSystemService(this,
+                    ClipboardManager.class);
             ClipData.Item item;
             if (clipboardManager.hasPrimaryClip()) {
                 item = clipboardManager.getPrimaryClip().getItemAt(0);

src/org/kde/kdeconnect/Plugins/ClibpoardPlugin/ClipboardListener.java

@@ -28,6 +28,8 @@ import android.os.Build;
 import android.os.Handler;
 import android.os.Looper;
 
+import androidx.core.content.ContextCompat;
+
 import java.util.HashSet;
 
 @TargetApi(Build.VERSION_CODES.HONEYCOMB)
@@ -68,7 +70,7 @@ public class ClipboardListener {
         context = ctx;
 
         new Handler(Looper.getMainLooper()).post(() -> {
-            cm = (ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);
+            cm = ContextCompat.getSystemService(context, ClipboardManager.class);
             listener = () -> {
                 try {
 

src/org/kde/kdeconnect/Plugins/FindMyPhonePlugin/FindMyPhonePlugin.java

@@ -23,7 +23,6 @@ package org.kde.kdeconnect.Plugins.FindMyPhonePlugin;
 import android.app.Activity;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
-import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.media.AudioManager;
@@ -37,6 +36,7 @@ import android.util.Log;
 
 import androidx.annotation.RequiresApi;
 import androidx.core.app.NotificationCompat;
+import androidx.core.content.ContextCompat;
 
 import org.kde.kdeconnect.Helpers.DeviceHelper;
 import org.kde.kdeconnect.Helpers.NotificationHelper;
@@ -81,10 +81,10 @@ public class FindMyPhonePlugin extends Plugin {
 
     @Override
     public boolean onCreate() {
-        notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        notificationManager = ContextCompat.getSystemService(context, NotificationManager.class);
         notificationId = (int) System.currentTimeMillis();
-        audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
+        audioManager = ContextCompat.getSystemService(context, AudioManager.class);
-        powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
+        powerManager = ContextCompat.getSystemService(context, PowerManager.class);
 
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         Uri ringtone;

src/org/kde/kdeconnect/Plugins/MousePadPlugin/MousePadActivity.java

@@ -20,7 +20,6 @@
 
 package org.kde.kdeconnect.Plugins.MousePadPlugin;
 
-import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Build;
 import android.os.Bundle;
@@ -34,11 +33,11 @@ import android.view.MotionEvent;
 import android.view.View;
 import android.view.inputmethod.InputMethodManager;
 
-import org.kde.kdeconnect.BackgroundService;
-import org.kde.kdeconnect.UserInterface.ThemeUtil;
-import org.kde.kdeconnect_tp.R;
-
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.content.ContextCompat;
+
+import org.kde.kdeconnect.BackgroundService;
+import org.kde.kdeconnect_tp.R;
 
 public class MousePadActivity extends AppCompatActivity implements GestureDetector.OnGestureListener, GestureDetector.OnDoubleTapListener, MousePadGestureDetector.OnGestureListener {
     private String deviceId;
@@ -367,7 +366,7 @@ public class MousePadActivity extends AppCompatActivity implements GestureDetect
 
     //TODO: Does not work on KitKat with or without requestFocus()
     private void showKeyboard() {
-        InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+        InputMethodManager imm = ContextCompat.getSystemService(this, InputMethodManager.class);
         keyListenerView.requestFocus();
         imm.toggleSoftInputFromWindow(keyListenerView.getWindowToken(), 0, 0);
     }

src/org/kde/kdeconnect/Plugins/MprisPlugin/AlbumArtCache.java

@@ -47,6 +47,7 @@ import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 
 import androidx.collection.LruCache;
+import androidx.core.content.ContextCompat;
 
 /**
  * Handles the cache for album art
@@ -110,7 +111,8 @@ final class AlbumArtCache {
             Log.e("KDE/Mpris/AlbumArtCache", "Could not open the album art disk cache!", e);
         }
 
-        connectivityManager = (ConnectivityManager) context.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+        connectivityManager = ContextCompat.getSystemService(context.getApplicationContext(),
+                ConnectivityManager.class);
     }
 
     /**

src/org/kde/kdeconnect/Plugins/MprisPlugin/MprisMediaSession.java

@@ -48,6 +48,7 @@ import java.util.HashSet;
 import androidx.annotation.RequiresApi;
 import androidx.core.app.NotificationCompat;
 import androidx.core.app.TaskStackBuilder;
+import androidx.core.content.ContextCompat;
 import androidx.media.app.NotificationCompat.MediaStyle;
 
 /**
@@ -461,14 +462,14 @@ public class MprisMediaSession implements SharedPreferences.OnSharedPreferenceCh
 
             //Display the notification
             mediaSession.setActive(true);
-            final NotificationManager nm = (NotificationManager) service.getSystemService(Context.NOTIFICATION_SERVICE);
+            final NotificationManager nm = ContextCompat.getSystemService(context, NotificationManager.class);
             nm.notify(MPRIS_MEDIA_NOTIFICATION_ID, notification.build());
         });
     }
 
     public void closeMediaNotification() {
         //Remove the notification
-        NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        NotificationManager nm = ContextCompat.getSystemService(context, NotificationManager.class);
         nm.cancel(MPRIS_MEDIA_NOTIFICATION_ID);
 
         //Clear the current player and media session

src/org/kde/kdeconnect/Plugins/MprisReceiverPlugin/MprisReceiverPlugin.java

@@ -21,7 +21,6 @@
 package org.kde.kdeconnect.Plugins.MprisReceiverPlugin;
 
 import android.content.ComponentName;
-import android.content.Context;
 import android.media.session.MediaController;
 import android.media.session.MediaSessionManager;
 import android.os.Build;
@@ -30,6 +29,11 @@ import android.os.Looper;
 import android.provider.Settings;
 import android.util.Log;
 
+import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
+import androidx.core.content.ContextCompat;
+import androidx.fragment.app.DialogFragment;
+
 import org.kde.kdeconnect.Helpers.AppsHelper;
 import org.kde.kdeconnect.NetworkPacket;
 import org.kde.kdeconnect.Plugins.NotificationsPlugin.NotificationReceiver;
@@ -42,10 +46,6 @@ import org.kde.kdeconnect_tp.R;
 import java.util.HashMap;
 import java.util.List;
 
-import androidx.annotation.Nullable;
-import androidx.annotation.RequiresApi;
-import androidx.fragment.app.DialogFragment;
-
 @PluginFactory.LoadablePlugin
 @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP_MR1)
 public class MprisReceiverPlugin extends Plugin {
@@ -65,7 +65,7 @@ public class MprisReceiverPlugin extends Plugin {
 
         players = new HashMap<>();
         try {
-            MediaSessionManager manager = (MediaSessionManager) context.getSystemService(Context.MEDIA_SESSION_SERVICE);
+            MediaSessionManager manager = ContextCompat.getSystemService(context, MediaSessionManager.class);
             if (null == manager)
                 return false;
 
@@ -85,7 +85,7 @@ public class MprisReceiverPlugin extends Plugin {
     @Override
     public void onDestroy() {
         super.onDestroy();
-        MediaSessionManager manager = (MediaSessionManager) context.getSystemService(Context.MEDIA_SESSION_SERVICE);
+        MediaSessionManager manager = ContextCompat.getSystemService(context, MediaSessionManager.class);
         if (manager != null && mediaSessionChangeListener != null) {
             manager.removeOnActiveSessionsChangedListener(mediaSessionChangeListener);
             mediaSessionChangeListener = null;

src/org/kde/kdeconnect/Plugins/PingPlugin/PingPlugin.java

@@ -24,10 +24,12 @@ import android.app.Activity;
 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
-import android.content.Context;
 import android.content.Intent;
 import android.util.Log;
 
+import androidx.core.app.NotificationCompat;
+import androidx.core.content.ContextCompat;
+
 import org.kde.kdeconnect.Helpers.NotificationHelper;
 import org.kde.kdeconnect.NetworkPacket;
 import org.kde.kdeconnect.Plugins.Plugin;
@@ -35,8 +37,6 @@ import org.kde.kdeconnect.Plugins.PluginFactory;
 import org.kde.kdeconnect.UserInterface.MainActivity;
 import org.kde.kdeconnect_tp.R;
 
-import androidx.core.app.NotificationCompat;
-
 @PluginFactory.LoadablePlugin
 public class PingPlugin extends Plugin {
 
@@ -79,7 +79,7 @@ public class PingPlugin extends Plugin {
             id = 42; //A unique id to create only one notification
         }
 
-        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        NotificationManager notificationManager = ContextCompat.getSystemService(context, NotificationManager.class);
 
         Notification noti = new NotificationCompat.Builder(context, NotificationHelper.Channels.DEFAULT)
                 .setContentTitle(device.getName())

src/org/kde/kdeconnect/Plugins/PresenterPlugin/PresenterActivity.java

@@ -20,7 +20,6 @@
 
 package org.kde.kdeconnect.Plugins.PresenterPlugin;
 
-import android.content.Context;
 import android.hardware.Sensor;
 import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
@@ -36,12 +35,13 @@ import android.view.MenuItem;
 import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.content.ContextCompat;
+import androidx.media.VolumeProviderCompat;
+
 import org.kde.kdeconnect.BackgroundService;
 import org.kde.kdeconnect_tp.R;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.media.VolumeProviderCompat;
-
 public class PresenterActivity extends AppCompatActivity implements SensorEventListener {
 
     private MediaSessionCompat mMediaSession;
@@ -74,7 +74,7 @@ public class PresenterActivity extends AppCompatActivity implements SensorEventL
         if (sensorManager != null) {
             return; //Already enabled
         }
-        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
+        sensorManager = ContextCompat.getSystemService(this, SensorManager.class);
         findViewById(R.id.pointer_button).setVisibility(View.VISIBLE);
         findViewById(R.id.pointer_button).setOnTouchListener((v, event) -> {
             if(event.getAction() == MotionEvent.ACTION_DOWN){
@@ -147,7 +147,7 @@ public class PresenterActivity extends AppCompatActivity implements SensorEventL
         }
 
         if (mMediaSession != null) {
-            PowerManager pm = (PowerManager) this.getSystemService(Context.POWER_SERVICE);
+            PowerManager pm = ContextCompat.getSystemService(this, PowerManager.class);
             boolean screenOn;
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
                 screenOn = pm.isInteractive();

src/org/kde/kdeconnect/Plugins/ReceiveNotificationsPlugin/ReceiveNotificationsPlugin.java

@@ -23,12 +23,14 @@ package org.kde.kdeconnect.Plugins.ReceiveNotificationsPlugin;
 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
-import android.content.Context;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.util.Log;
 
+import androidx.core.app.NotificationCompat;
+import androidx.core.content.ContextCompat;
+
 import org.kde.kdeconnect.Helpers.NotificationHelper;
 import org.kde.kdeconnect.NetworkPacket;
 import org.kde.kdeconnect.Plugins.Plugin;
@@ -38,8 +40,6 @@ import org.kde.kdeconnect_tp.R;
 
 import java.io.InputStream;
 
-import androidx.core.app.NotificationCompat;
-
 @PluginFactory.LoadablePlugin
 public class ReceiveNotificationsPlugin extends Plugin {
 
@@ -106,7 +106,7 @@ public class ReceiveNotificationsPlugin extends Plugin {
             }
         }
 
-        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+        NotificationManager notificationManager = ContextCompat.getSystemService(context, NotificationManager.class);
 
         Notification noti = new NotificationCompat.Builder(context, NotificationHelper.Channels.RECEIVENOTIFICATION)
                 .setContentTitle(np.getString("appName"))

src/org/kde/kdeconnect/Plugins/RemoteKeyboardPlugin/RemoteKeyboardService.java

@@ -20,7 +20,6 @@
 
 package org.kde.kdeconnect.Plugins.RemoteKeyboardPlugin;
 
-import android.content.Context;
 import android.content.Intent;
 import android.inputmethodservice.InputMethodService;
 import android.inputmethodservice.Keyboard;
@@ -34,8 +33,10 @@ import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.Toast;
 
-import org.kde.kdeconnect.UserInterface.PluginSettingsActivity;
+import androidx.core.content.ContextCompat;
+
 import org.kde.kdeconnect.UserInterface.MainActivity;
+import org.kde.kdeconnect.UserInterface.PluginSettingsActivity;
 import org.kde.kdeconnect_tp.R;
 
 import java.util.ArrayList;
@@ -189,7 +190,7 @@ public class RemoteKeyboardService
                 break;
             }
             case 2: { // "keyboard"
-                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+                InputMethodManager imm = ContextCompat.getSystemService(this, InputMethodManager.class);
                 imm.showInputMethodPicker();
                 break;
             }

src/org/kde/kdeconnect/Plugins/RunCommandPlugin/RunCommandActivity.java

@@ -21,8 +21,8 @@
 
 package org.kde.kdeconnect.Plugins.RunCommandPlugin;
 
+import android.content.ClipData;
 import android.content.ClipboardManager;
-import android.content.Context;
 import android.os.Build;
 import android.os.Bundle;
 import android.util.Log;
@@ -35,6 +35,11 @@ import android.widget.ListView;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import androidx.annotation.RequiresApi;
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.content.ContextCompat;
+
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 
 import org.json.JSONException;
@@ -46,10 +51,6 @@ import org.kde.kdeconnect_tp.R;
 import java.util.ArrayList;
 import java.util.Collections;
 
-import androidx.annotation.RequiresApi;
-import androidx.appcompat.app.AlertDialog;
-import androidx.appcompat.app.AppCompatActivity;
-
 public class RunCommandActivity extends AppCompatActivity {
 
     private String deviceId;
@@ -143,7 +144,7 @@ public class RunCommandActivity extends AppCompatActivity {
         if (item.getItemId() == R.id.copy_url_to_clipboard) {
             CommandEntry entry = (CommandEntry) commandItems.get(info.position);
             String url = "kdeconnect://runcommand/" + deviceId + "/" + entry.getKey();
-            ClipboardManager cm = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
+            ClipboardManager cm = ContextCompat.getSystemService(this, ClipboardManager.class);
             cm.setText(url);
             Toast toast = Toast.makeText(this, R.string.clipboard_toast, Toast.LENGTH_SHORT);
             toast.show();

src/org/kde/kdeconnect/Plugins/SharePlugin/CompositeReceiveFileJob.java

@@ -22,12 +22,16 @@ package org.kde.kdeconnect.Plugins.SharePlugin;
 
 import android.app.DownloadManager;
 import android.content.ActivityNotFoundException;
-import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Build;
 import android.util.Log;
 
+import androidx.annotation.GuardedBy;
+import androidx.core.content.ContextCompat;
+import androidx.core.content.FileProvider;
+import androidx.documentfile.provider.DocumentFile;
+
 import org.kde.kdeconnect.Device;
 import org.kde.kdeconnect.Helpers.FilesHelper;
 import org.kde.kdeconnect.Helpers.MediaStoreHelper;
@@ -43,10 +47,6 @@ import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.List;
 
-import androidx.annotation.GuardedBy;
-import androidx.core.content.FileProvider;
-import androidx.documentfile.provider.DocumentFile;
-
 /**
  * A type of {@link BackgroundJob} that reads Files from another device.
  *
@@ -330,7 +330,8 @@ public class CompositeReceiveFileJob extends BackgroundJob<Device, Void> {
     private void publishFile(DocumentFile fileDocument, long size) {
         if (!ShareSettingsFragment.isCustomDestinationEnabled(getDevice().getContext())) {
             Log.i("SharePlugin", "Adding to downloads");
-            DownloadManager manager = (DownloadManager) getDevice().getContext().getSystemService(Context.DOWNLOAD_SERVICE);
+            DownloadManager manager = ContextCompat.getSystemService(getDevice().getContext(),
+                    DownloadManager.class);
             manager.addCompletedDownload(fileDocument.getUri().getLastPathSegment(), getDevice().getName(), true, fileDocument.getType(), fileDocument.getUri().getPath(), size, false);
         } else {
             //Make sure it is added to the Android Gallery anyway

src/org/kde/kdeconnect/Plugins/SharePlugin/ReceiveNotification.java

@@ -23,7 +23,6 @@ package org.kde.kdeconnect.Plugins.SharePlugin;
 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
-import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.Bitmap;
@@ -32,6 +31,10 @@ import android.net.Uri;
 import android.os.Build;
 import android.preference.PreferenceManager;
 
+import androidx.core.app.NotificationCompat;
+import androidx.core.content.ContextCompat;
+import androidx.core.content.FileProvider;
+
 import org.kde.kdeconnect.Device;
 import org.kde.kdeconnect.Helpers.NotificationHelper;
 import org.kde.kdeconnect_tp.R;
@@ -40,9 +43,6 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 
-import androidx.core.app.NotificationCompat;
-import androidx.core.content.FileProvider;
-
 class ReceiveNotification {
     private final NotificationManager notificationManager;
     private final int notificationId;
@@ -59,7 +59,7 @@ class ReceiveNotification {
 
         this.jobId = jobId;
         notificationId = (int) System.currentTimeMillis();
-        notificationManager = (NotificationManager) device.getContext().getSystemService(Context.NOTIFICATION_SERVICE);
+        notificationManager = ContextCompat.getSystemService(device.getContext(), NotificationManager.class);
         builder = new NotificationCompat.Builder(device.getContext(), NotificationHelper.Channels.FILETRANSFER)
                 .setSmallIcon(android.R.drawable.stat_sys_download)
                 .setAutoCancel(true)

src/org/kde/kdeconnect/Plugins/SharePlugin/SharePlugin.java

@@ -23,7 +23,6 @@ package org.kde.kdeconnect.Plugins.SharePlugin;
 import android.Manifest;
 import android.app.Activity;
 import android.content.ClipboardManager;
-import android.content.Context;
 import android.content.Intent;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
@@ -33,6 +32,10 @@ import android.os.Looper;
 import android.util.Log;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.WorkerThread;
+import androidx.core.content.ContextCompat;
+
 import org.kde.kdeconnect.Helpers.FilesHelper;
 import org.kde.kdeconnect.Helpers.IntentHelper;
 import org.kde.kdeconnect.NetworkPacket;
@@ -46,10 +49,6 @@ import org.kde.kdeconnect_tp.R;
 import java.net.URL;
 import java.util.ArrayList;
 
-import androidx.annotation.NonNull;
-import androidx.annotation.WorkerThread;
-import androidx.core.content.ContextCompat;
-
 /**
  * A Plugin for sharing and receiving files and uris.
  * <p>
@@ -176,7 +175,7 @@ public class SharePlugin extends Plugin {
 
     private void receiveText(NetworkPacket np) {
         String text = np.getString("text");
-        ClipboardManager cm = (ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);
+        ClipboardManager cm = ContextCompat.getSystemService(context, ClipboardManager.class);
         cm.setText(text);
         handler.post(() -> Toast.makeText(context, R.string.shareplugin_text_saved, Toast.LENGTH_LONG).show());
     }

src/org/kde/kdeconnect/Plugins/SharePlugin/UploadNotification.java

@@ -23,17 +23,17 @@ package org.kde.kdeconnect.Plugins.SharePlugin;
 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
-import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 
+import androidx.core.app.NotificationCompat;
+import androidx.core.content.ContextCompat;
+import androidx.preference.PreferenceManager;
+
 import org.kde.kdeconnect.Device;
 import org.kde.kdeconnect.Helpers.NotificationHelper;
 import org.kde.kdeconnect_tp.R;
 
-import androidx.core.app.NotificationCompat;
-import androidx.preference.PreferenceManager;
-
 class UploadNotification {
     private final NotificationManager notificationManager;
     private NotificationCompat.Builder builder;
@@ -46,7 +46,7 @@ class UploadNotification {
         this.jobId = jobId;
 
         notificationId = (int) System.currentTimeMillis();
-        notificationManager = (NotificationManager) device.getContext().getSystemService(Context.NOTIFICATION_SERVICE);
+        notificationManager = ContextCompat.getSystemService(device.getContext(), NotificationManager.class);
         builder = new NotificationCompat.Builder(device.getContext(), NotificationHelper.Channels.FILETRANSFER)
                 .setSmallIcon(android.R.drawable.stat_sys_upload)
                 .setAutoCancel(true)

src/org/kde/kdeconnect/Plugins/TelephonyPlugin/TelephonyPlugin.java

@@ -227,7 +227,7 @@ public class TelephonyPlugin extends Plugin {
 
     private void unmuteRinger() {
         if (isMuted) {
-            AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
+            AudioManager am = ContextCompat.getSystemService(context, AudioManager.class);
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                 am.setStreamVolume(AudioManager.STREAM_RING, AudioManager.ADJUST_UNMUTE, 0);
             } else {
@@ -239,7 +239,7 @@ public class TelephonyPlugin extends Plugin {
 
     private void muteRinger() {
         if (!isMuted) {
-            AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
+            AudioManager am = ContextCompat.getSystemService(context, AudioManager.class);
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                 am.setStreamVolume(AudioManager.STREAM_RING, AudioManager.ADJUST_MUTE, 0);
             } else {

src/org/kde/kdeconnect/UserInterface/List/ListAdapter.java

@@ -27,6 +27,7 @@ import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
 
 import androidx.annotation.NonNull;
+import androidx.core.content.ContextCompat;
 
 import java.util.ArrayList;
 
@@ -43,7 +44,7 @@ public class ListAdapter extends ArrayAdapter<ListAdapter.Item> {
     public ListAdapter(Context context, ArrayList<Item> items) {
         super(context, 0, items);
         this.items = items;
-        layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        layoutInflater = ContextCompat.getSystemService(context, LayoutInflater.class);
     }
 
     @NonNull

src/org/kde/kdeconnect/UserInterface/PairingFragment.java

@@ -42,6 +42,7 @@ import android.widget.ListView;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
+import androidx.core.content.ContextCompat;
 import androidx.fragment.app.Fragment;
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 
@@ -123,7 +124,8 @@ public class PairingFragment extends Fragment implements PairingDeviceItem.Callb
                     updateDeviceList();
                 }
             };
-            ConnectivityManager connManager = (ConnectivityManager) getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+            ConnectivityManager connManager = ContextCompat.getSystemService(requireContext(),
+                    ConnectivityManager.class);
             connManager.registerNetworkCallback(new NetworkRequest.Builder().build(), (ConnectivityManager.NetworkCallback) networkChangeListener);
         }
 
@@ -133,7 +135,8 @@ public class PairingFragment extends Fragment implements PairingDeviceItem.Callb
     @Override
     public void onDestroyView() {
         if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-            ConnectivityManager connManager = (ConnectivityManager) getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+            ConnectivityManager connManager = ContextCompat.getSystemService(requireContext(),
+                    ConnectivityManager.class);
             connManager.unregisterNetworkCallback((ConnectivityManager.NetworkCallback) networkChangeListener);
         }
 
@@ -186,7 +189,8 @@ public class PairingFragment extends Fragment implements PairingDeviceItem.Callb
             ((ListView) rootView.findViewById(R.id.devices_list)).removeHeaderView(headerText);
             ((ListView) rootView.findViewById(R.id.devices_list)).removeHeaderView(noWifiHeader);
             ((ListView) rootView.findViewById(R.id.devices_list)).removeHeaderView(notTrustedText);
-            ConnectivityManager connManager = (ConnectivityManager) getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+            ConnectivityManager connManager = ContextCompat.getSystemService(requireContext(),
+                    ConnectivityManager.class);
             NetworkInfo wifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
             //Check if we're on Wi-Fi. If we still see a device, don't do anything special
             if (someDevicesReachable || wifi.isConnected()) {

tests/org/kde/kdeconnect/DeviceTest.java

@@ -27,6 +27,8 @@ import android.preference.PreferenceManager;
 import android.util.Base64;
 import android.util.Log;
 
+import androidx.core.content.ContextCompat;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -111,7 +113,7 @@ public class DeviceTest {
         PowerMockito.when(PreferenceManager.getDefaultSharedPreferences(any())).thenReturn(defaultSettings);
         RsaHelper.initialiseRsaKeys(context);
 
-        Mockito.when(context.getSystemService(eq(Context.NOTIFICATION_SERVICE))).thenReturn(Mockito.mock(NotificationManager.class));
+        Mockito.when(ContextCompat.getSystemService(context, NotificationManager.class)).thenReturn(Mockito.mock(NotificationManager.class));
     }
 
     @Test