Restyle: Applied project code style to entire local_file_transfer sub-package

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/DeviceListFragment.java

@@ -54,8 +54,9 @@ import static org.kiwix.kiwixmobile.zim_manager.local_file_transfer.LocalFileTra
  * device and {@link ReceiverDeviceAsyncTask} files receiving device
  *
  * The starting point for the module is {@link LocalFileTransferActivity}
- * */
+ */
-public class DeviceListFragment extends ListFragment implements WifiP2pManager.PeerListListener, WifiP2pManager.ConnectionInfoListener {
+public class DeviceListFragment extends ListFragment
+    implements WifiP2pManager.PeerListListener, WifiP2pManager.ConnectionInfoListener {
 
   public static final String TAG = "DeviceListFragment";
   public static int PEER_HANDSHAKE_PORT = 8009;
@@ -64,8 +65,10 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
   private SharedPreferenceUtil sharedPreferenceUtil;
   private AlertDialogShower alertDialogShower;
 
-  private LocalFileTransferActivity localFileTransferActivity;  // Parent activity, starting point of the module
+  private LocalFileTransferActivity localFileTransferActivity;
-  private TransferProgressFragment transferProgressFragment;    // Sibling fragment, for displaying transfer progress
+      // Parent activity, starting point of the module
+  private TransferProgressFragment transferProgressFragment;
+      // Sibling fragment, for displaying transfer progress
 
   // Views part of the DeviceListFragment
   @BindView(R.id.text_view_device_name) TextView deviceName;
@@ -75,13 +78,15 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
   private Unbinder unbinder;
 
   private boolean fileSender = false; // Whether file sending device or not
-  private ArrayList<Uri> fileUriList; // Uris of files to be shared, available only for the sender device
+  private ArrayList<Uri> fileUriList;
+      // Uris of files to be shared, available only for the sender device
   private int totalFilesForTransfer = -1;
   private int filesSent = 0;          // Count of number of files transferred until now
   private ArrayList<FileItem> filesToSend = new ArrayList<>();
 
   private WifiP2pDevice userDevice;   // Represents the device on which the app is running
-  private WifiP2pInfo groupInfo;      // Corresponds to the WiFi P2P group formed between the two devices
+  private WifiP2pInfo groupInfo;
+      // Corresponds to the WiFi P2P group formed between the two devices
   private List<WifiP2pDevice> peerDevices = new ArrayList<WifiP2pDevice>();
 
   private WifiP2pDevice selectedPeerDevice = null;
@@ -100,7 +105,8 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
     localFileTransferActivity = (LocalFileTransferActivity) getActivity();
 
     // As DeviceListFragment extends ListFragment for the purpose of displaying list of peers
-    this.setListAdapter(new WifiPeerListAdapter(localFileTransferActivity, R.layout.row_peer_device, peerDevices));
+    this.setListAdapter(
+        new WifiPeerListAdapter(localFileTransferActivity, R.layout.row_peer_device, peerDevices));
 
     if (localFileTransferActivity.isFileSender()) {
       fileSender = true;
@@ -113,11 +119,11 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
 
       displayTransferProgressFragment();
     }
-
   }
 
   @Override
-  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+  public View onCreateView(LayoutInflater inflater, ViewGroup container,
+      Bundle savedInstanceState) {
     View view = inflater.inflate(R.layout.fragment_device_list, null);
     unbinder = ButterKnife.bind(this, view);
 
@@ -133,11 +139,13 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
   @Override
   public void onListItemClick(ListView l, View v, int position, long id) {
     /* Connection can only be initiated by user of the sender device, & only when transfer has not been started */
-    if(!isFileSender() || fileTransferStarted)
+    if (!isFileSender() || fileTransferStarted) {
       return;
+    }
 
     selectedPeerDevice = (WifiP2pDevice) getListAdapter().getItem(position);
-    alertDialogShower.show(new KiwixDialog.FileTransferConfirmation(selectedPeerDevice), new Function0<Unit>() {
+    alertDialogShower.show(new KiwixDialog.FileTransferConfirmation(selectedPeerDevice),
+        new Function0<Unit>() {
           @Override public Unit invoke() {
             ((DeviceActionListener) localFileTransferActivity).connect(selectedPeerDevice);
             showToast(localFileTransferActivity, R.string.performing_handshake, Toast.LENGTH_LONG);
@@ -167,13 +175,19 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
 
     if (BuildConfig.DEBUG) Log.d(TAG, "Peer Status: " + status);
     switch (status) {
-      case WifiP2pDevice.AVAILABLE : return "Available";
+      case WifiP2pDevice.AVAILABLE:
-      case WifiP2pDevice.INVITED   : return "Invited";
+        return "Available";
-      case WifiP2pDevice.CONNECTED : return "Connected";
+      case WifiP2pDevice.INVITED:
-      case WifiP2pDevice.FAILED    : return "Failed";
+        return "Invited";
-      case WifiP2pDevice.UNAVAILABLE:return "Unavailable";
+      case WifiP2pDevice.CONNECTED:
+        return "Connected";
+      case WifiP2pDevice.FAILED:
+        return "Failed";
+      case WifiP2pDevice.UNAVAILABLE:
+        return "Unavailable";
 
-      default: return "Unknown";
+      default:
+        return "Unknown";
     }
   }
 
@@ -247,12 +261,12 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
 
       receiverDeviceAsyncTask = new ReceiverDeviceAsyncTask(this, transferProgressFragment);
       receiverDeviceAsyncTask.execute();
-
     } else if (groupInfo.groupFormed) {
       {
         Log.d(LocalFileTransferActivity.TAG, "Starting file transfer");
 
-        fileReceiverDeviceAddress = (groupInfo.isGroupOwner) ?  selectedPeerDeviceInetAddress : groupInfo.groupOwnerAddress;
+        fileReceiverDeviceAddress =
+            (groupInfo.isGroupOwner) ? selectedPeerDeviceInetAddress : groupInfo.groupOwnerAddress;
 
         // Hack for allowing slower receiver devices to setup server before sender device requests to connect
         showToast(localFileTransferActivity, R.string.preparing_files, Toast.LENGTH_LONG);
@@ -260,7 +274,8 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
 
         senderDeviceAsyncTaskArray = new SenderDeviceAsyncTask[totalFilesForTransfer];
         for (int i = 0; i < totalFilesForTransfer; i++) {
-          senderDeviceAsyncTaskArray[i] = new SenderDeviceAsyncTask(this, transferProgressFragment, i);
+          senderDeviceAsyncTaskArray[i] =
+              new SenderDeviceAsyncTask(this, transferProgressFragment, i);
           senderDeviceAsyncTaskArray[i].execute(fileUriList.get(i));
         }
       }
@@ -305,7 +320,8 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
     return (filesSent == totalFilesForTransfer);
   }
 
-  public void performFieldInjection(SharedPreferenceUtil sharedPreferenceUtil, AlertDialogShower alertDialogShower) {
+  public void performFieldInjection(SharedPreferenceUtil sharedPreferenceUtil,
+      AlertDialogShower alertDialogShower) {
     this.sharedPreferenceUtil = sharedPreferenceUtil;
     this.alertDialogShower = alertDialogShower;
   }
@@ -318,14 +334,14 @@ public class DeviceListFragment extends ListFragment implements WifiP2pManager.P
     return fileReceiverDeviceAddress;
   }
 
-
   public static String getFileName(Uri fileUri) {
     String fileUriString = fileUri.toString();
     // Returns text after location of last slash in the file path
     return fileUriString.substring(fileUriString.lastIndexOf('/') + 1);
   }
 
-  public static void copyToOutputStream(InputStream inputStream, OutputStream outputStream) throws IOException {
+  public static void copyToOutputStream(InputStream inputStream, OutputStream outputStream)
+      throws IOException {
     byte[] bufferForBytes = new byte[1024];
     int bytesRead;
 

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/FileItem.java

@@ -13,7 +13,7 @@ import static org.kiwix.kiwixmobile.zim_manager.local_file_transfer.FileItem.Fil
  * Helper class, part of the local file sharing module.
  *
  * Defines a file-item to represent the files being transferred.
- * */
+ */
 public class FileItem implements Parcelable {
 
   @Retention(RetentionPolicy.SOURCE)

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/FileListAdapter.java

@@ -20,7 +20,7 @@ import static org.kiwix.kiwixmobile.zim_manager.local_file_transfer.FileItem.Fil
  * Helper class, part of the local file sharing module.
  *
  * Defines the Adapter for the list of file-items displayed in {@link TransferProgressFragment}
- * */
+ */
 public class FileListAdapter extends RecyclerView.Adapter<FileListAdapter.FileViewHolder> {
   private final ArrayList<FileItem> fileItems;
 
@@ -30,8 +30,10 @@ public class FileListAdapter extends RecyclerView.Adapter<FileListAdapter.FileVi
 
   @NonNull
   @Override
-  public FileListAdapter.FileViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+  public FileListAdapter.FileViewHolder onCreateViewHolder(@NonNull ViewGroup parent,
-    View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_transfer_list, parent, false);
+      int viewType) {
+    View itemView = LayoutInflater.from(parent.getContext())
+        .inflate(R.layout.item_transfer_list, parent, false);
     return new FileViewHolder(itemView, this);
   }
 
@@ -45,14 +47,16 @@ public class FileListAdapter extends RecyclerView.Adapter<FileListAdapter.FileVi
     if (fileItem.getFileStatus() == SENDING) {
       holder.statusImage.setVisibility(View.GONE);
       holder.progressBar.setVisibility(View.VISIBLE);
-
+    } else if (fileItem.getFileStatus()
-    } else if(fileItem.getFileStatus() != TO_BE_SENT){ // Icon for TO_BE_SENT is assigned by default in the item layout
+        != TO_BE_SENT) { // Icon for TO_BE_SENT is assigned by default in the item layout
       holder.progressBar.setVisibility(View.GONE);
 
       switch (fileItem.getFileStatus()) {
-        case SENT :  holder.statusImage.setImageResource(R.drawable.ic_baseline_check_24px);
+        case SENT:
+          holder.statusImage.setImageResource(R.drawable.ic_baseline_check_24px);
           break;
-        case ERROR:  holder.statusImage.setImageResource(R.drawable.ic_baseline_error_24px);
+        case ERROR:
+          holder.statusImage.setImageResource(R.drawable.ic_baseline_error_24px);
           break;
       }
 

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/LocalFileTransferActivity.java

@@ -52,10 +52,12 @@ import javax.inject.Inject;
  *
  * The module uses this activity along with {@link DeviceListFragment} to manage connection
  * and file transfer between the devices.
- * */
+ */
-public class LocalFileTransferActivity extends AppCompatActivity implements WifiP2pManager.ChannelListener, DeviceListFragment.DeviceActionListener {
+public class LocalFileTransferActivity extends AppCompatActivity
+    implements WifiP2pManager.ChannelListener, DeviceListFragment.DeviceActionListener {
 
-  public static final String TAG = "LocalFileTransferActvty"; // Not a typo, 'Log' tags have a length upper limit of 25 characters
+  public static final String TAG = "LocalFileTransferActvty";
+      // Not a typo, 'Log' tags have a length upper limit of 25 characters
   public static final int REQUEST_ENABLE_WIFI_P2P = 1;
   public static final int REQUEST_ENABLE_LOCATION_SERVICES = 2;
   private static final int PERMISSION_REQUEST_CODE_COARSE_LOCATION = 1;
@@ -66,18 +68,20 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
 
   @BindView(R.id.toolbar_local_file_transfer) Toolbar actionBar;
 
-  private ArrayList<Uri> fileUriArrayList;  // For sender device, stores Uris of files to be transferred
+  private ArrayList<Uri> fileUriArrayList;
+      // For sender device, stores Uris of files to be transferred
   private Boolean fileSendingDevice = false;// Whether the device is the file sender or not
 
-
   /* Variables related to the WiFi P2P API */
   private boolean wifiP2pEnabled = false; // Whether WiFi has been enabled or not
   private boolean retryChannel = false;   // Whether channel has retried connecting previously
 
   private WifiP2pManager manager;         // Overall manager of Wifi p2p connections for the module
-  private WifiP2pManager.Channel channel; // Connects the module to device's underlying Wifi p2p framework
+  private WifiP2pManager.Channel channel;
+      // Connects the module to device's underlying Wifi p2p framework
 
-  private final IntentFilter intentFilter = new IntentFilter(); // For specifying broadcasts (of the P2P API) that the module needs to respond to
+  private final IntentFilter intentFilter = new IntentFilter();
+      // For specifying broadcasts (of the P2P API) that the module needs to respond to
   private BroadcastReceiver receiver = null; // For receiving the broadcasts given by above filter
 
   @Override
@@ -151,30 +155,33 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
         return true;
       }
 
-      final DeviceListFragment deviceListFragment = (DeviceListFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_device_list);
+      final DeviceListFragment deviceListFragment =
+          (DeviceListFragment) getSupportFragmentManager().findFragmentById(
+              R.id.fragment_device_list);
       deviceListFragment.onInitiateDiscovery();
       deviceListFragment.performFieldInjection(sharedPreferenceUtil, alertDialogShower);
       manager.discoverPeers(channel, new WifiP2pManager.ActionListener() {
         @Override
         public void onSuccess() {
-          showToast(LocalFileTransferActivity.this, R.string.discovery_initiated, Toast.LENGTH_SHORT);
+          showToast(LocalFileTransferActivity.this, R.string.discovery_initiated,
+              Toast.LENGTH_SHORT);
         }
 
         @Override
         public void onFailure(int reason) {
           String errorMessage = getErrorMessage(reason);
           Log.d(TAG, getString(R.string.discovery_failed) + ": " + errorMessage);
-          showToast(LocalFileTransferActivity.this, LocalFileTransferActivity.this.getString(R.string.discovery_failed), Toast.LENGTH_SHORT);
+          showToast(LocalFileTransferActivity.this,
+              LocalFileTransferActivity.this.getString(R.string.discovery_failed),
+              Toast.LENGTH_SHORT);
         }
       });
       return true;
-
     } else {
       return super.onOptionsItemSelected(item);
     }
   }
 
-
   /* Helper methods used in the activity */
   public void setDeviceAsFileSender() {
     fileSendingDevice = true;
@@ -198,23 +205,31 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
 
   private String getErrorMessage(int reason) {
     switch (reason) {
-      case WifiP2pManager.ERROR:           return "Internal error";
+      case WifiP2pManager.ERROR:
-      case WifiP2pManager.BUSY:            return "Framework busy, unable to service request";
+        return "Internal error";
-      case WifiP2pManager.P2P_UNSUPPORTED: return "P2P unsupported on this device";
+      case WifiP2pManager.BUSY:
+        return "Framework busy, unable to service request";
+      case WifiP2pManager.P2P_UNSUPPORTED:
+        return "P2P unsupported on this device";
 
-      default: return "Unknown error code - "+reason;
+      default:
+        return "Unknown error code - " + reason;
     }
   }
 
   public void resetPeers() {
-    DeviceListFragment deviceListFragment = (DeviceListFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_device_list);
+    DeviceListFragment deviceListFragment =
+        (DeviceListFragment) getSupportFragmentManager().findFragmentById(
+            R.id.fragment_device_list);
     if (deviceListFragment != null) {
       deviceListFragment.clearPeers();
     }
   }
 
   public void resetData() {
-    DeviceListFragment deviceListFragment = (DeviceListFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_device_list);
+    DeviceListFragment deviceListFragment =
+        (DeviceListFragment) getSupportFragmentManager().findFragmentById(
+            R.id.fragment_device_list);
     if (deviceListFragment != null) {
       deviceListFragment.clearPeers();
     }
@@ -228,7 +243,6 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
     Toast.makeText(context, text, duration).show();
   }
 
-
   /* From WifiP2pManager.ChannelListener interface */
   @Override
   public void onChannelDisconnected() {
@@ -238,13 +252,11 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
       resetData();
       retryChannel = true;
       manager.initialize(this, getMainLooper(), this);
-
     } else {
       showToast(this, R.string.severe_loss_error, Toast.LENGTH_LONG);
     }
   }
 
-
   /* From DeviceListFragment.DeviceActionListener interface */
   @Override
   public void connect(@NonNull final WifiP2pDevice peerDevice) {
@@ -262,14 +274,17 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
       public void onFailure(int reason) {
         String errorMessage = getErrorMessage(reason);
         Log.d(TAG, getString(R.string.connection_failed) + ": " + errorMessage);
-        showToast(LocalFileTransferActivity.this, getString(R.string.connection_failed), Toast.LENGTH_LONG);
+        showToast(LocalFileTransferActivity.this, getString(R.string.connection_failed),
+            Toast.LENGTH_LONG);
       }
     });
   }
 
   @Override
   public void closeLocalFileTransferActivity() {
-    final DeviceListFragment deviceListFragment = (DeviceListFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_device_list);
+    final DeviceListFragment deviceListFragment =
+        (DeviceListFragment) getSupportFragmentManager().findFragmentById(
+            R.id.fragment_device_list);
     if (deviceListFragment != null) {
       deviceListFragment.cancelAsyncTasks();
     }
@@ -291,7 +306,6 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
       public void onSuccess() {
         Log.d(TAG, "Disconnect successful");
       }
-
     });
   }
 
@@ -299,18 +313,21 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
   private boolean checkCoarseLocationAccessPermission() { // Required by Android to detect wifi-p2p peers
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
 
-      if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
+      if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)
+          != PackageManager.PERMISSION_GRANTED) {
 
         if (shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_COARSE_LOCATION)) {
-          alertDialogShower.show(KiwixDialog.LocationPermissionRationale.INSTANCE, new Function0<Unit>() {
+          alertDialogShower.show(KiwixDialog.LocationPermissionRationale.INSTANCE,
+              new Function0<Unit>() {
                 @Override public Unit invoke() {
-              requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, PERMISSION_REQUEST_CODE_COARSE_LOCATION);
+                  requestPermissions(new String[] { Manifest.permission.ACCESS_COARSE_LOCATION },
+                      PERMISSION_REQUEST_CODE_COARSE_LOCATION);
                   return Unit.INSTANCE;
                 }
               });
-
         } else {
-          requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, PERMISSION_REQUEST_CODE_COARSE_LOCATION);
+          requestPermissions(new String[] { Manifest.permission.ACCESS_COARSE_LOCATION },
+              PERMISSION_REQUEST_CODE_COARSE_LOCATION);
         }
 
         return false;
@@ -323,18 +340,21 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
   private boolean checkExternalStorageWritePermission() { // To access and store the zims
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
 
-      if(ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
+      if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
+          != PackageManager.PERMISSION_GRANTED) {
 
         if (shouldShowRequestPermissionRationale(Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
-          alertDialogShower.show(KiwixDialog.StoragePermissionRationale.INSTANCE, new Function0<Unit>() {
+          alertDialogShower.show(KiwixDialog.StoragePermissionRationale.INSTANCE,
+              new Function0<Unit>() {
                 @Override public Unit invoke() {
-              requestPermissions(new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_CODE_STORAGE_WRITE_ACCESS);
+                  requestPermissions(new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE },
+                      PERMISSION_REQUEST_CODE_STORAGE_WRITE_ACCESS);
                   return Unit.INSTANCE;
                 }
               });
-
         } else {
-          requestPermissions(new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_CODE_STORAGE_WRITE_ACCESS);
+          requestPermissions(new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE },
+              PERMISSION_REQUEST_CODE_STORAGE_WRITE_ACCESS);
         }
 
         return false;
@@ -371,34 +391,42 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
   }
 
   private boolean isLocationServicesEnabled() {
-    LocationManager locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
+    LocationManager locationManager =
+        (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
     boolean gps_enabled = false;
     boolean network_enabled = false;
 
     try {
       gps_enabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
-    } catch(Exception ex) {ex.printStackTrace();}
+    } catch (Exception ex) {
+      ex.printStackTrace();
+    }
 
     try {
       network_enabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
-    } catch(Exception ex) {ex.printStackTrace();}
+    } catch (Exception ex) {
+      ex.printStackTrace();
+    }
 
     return (gps_enabled || network_enabled);
   }
 
   private void requestEnableLocationServices() {
     FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
-    Fragment prev = getSupportFragmentManager().findFragmentByTag(RequestEnableLocationServicesDialog.TAG);
+    Fragment prev =
+        getSupportFragmentManager().findFragmentByTag(RequestEnableLocationServicesDialog.TAG);
 
     if (prev == null) {
-      RequestEnableLocationServicesDialog dialogFragment = new RequestEnableLocationServicesDialog();
+      RequestEnableLocationServicesDialog dialogFragment =
+          new RequestEnableLocationServicesDialog();
       dialogFragment.show(fragmentTransaction, RequestEnableLocationServicesDialog.TAG);
     }
   }
 
   private void requestEnableWifiP2pServices() {
     FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
-    Fragment prev = getSupportFragmentManager().findFragmentByTag(RequestEnableWifiP2pServicesDialog.TAG);
+    Fragment prev =
+        getSupportFragmentManager().findFragmentByTag(RequestEnableWifiP2pServicesDialog.TAG);
 
     if (prev == null) {
       RequestEnableWifiP2pServicesDialog dialogFragment = new RequestEnableWifiP2pServicesDialog();
@@ -412,9 +440,11 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
 
     switch (requestCode) {
       case REQUEST_ENABLE_LOCATION_SERVICES: {
-        LocationManager locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
+        LocationManager locationManager =
+            (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
 
-        if(!(locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) || locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER))) {
+        if (!(locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)
+            || locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER))) {
           // If neither provider is enabled
           showToast(this, R.string.permission_refused_location, Toast.LENGTH_LONG);
         }
@@ -445,7 +475,9 @@ public class LocalFileTransferActivity extends AppCompatActivity implements Wifi
 
   @Override protected void onDestroy() {
     super.onDestroy();
-    final DeviceListFragment deviceListFragment = (DeviceListFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_device_list);
+    final DeviceListFragment deviceListFragment =
+        (DeviceListFragment) getSupportFragmentManager().findFragmentById(
+            R.id.fragment_device_list);
     if (deviceListFragment != null) {
       deviceListFragment.cancelAsyncTasks();
     }

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/PeerGroupHandshakeAsyncTask.java

@@ -33,7 +33,7 @@ import static org.kiwix.kiwixmobile.zim_manager.local_file_transfer.FileItem.Fil
  * (no. of files & their names) with the receiver. Finally, the onPostExecute() of the sender
  * initiates the file transfer through {@link SenderDeviceAsyncTask} on the sender and using
  * {@link ReceiverDeviceAsyncTask} on the receiver.
- * */
+ */
 class PeerGroupHandshakeAsyncTask extends AsyncTask<Void, Void, InetAddress> {
 
   private static final String TAG = "PeerGrpHndshakeAsyncTsk";
@@ -66,7 +66,6 @@ class PeerGroupHandshakeAsyncTask extends AsyncTask<Void, Void, InetAddress> {
           exchangeFileTransferMetadata(server.getOutputStream(), server.getInputStream());
 
           return server.getInetAddress();
-
         } else { // Selected device is not accepting wifi direct connections through the kiwix app
           return null;
         }
@@ -74,25 +73,24 @@ class PeerGroupHandshakeAsyncTask extends AsyncTask<Void, Void, InetAddress> {
         ex.printStackTrace();
         return null;
       }
-    }
+    } else if (groupInfo.groupFormed && !isCancelled()) { //&& !groupInfo.isGroupOwner
-    else if(groupInfo.groupFormed && !isCancelled()) { //&& !groupInfo.isGroupOwner
       try (Socket client = new Socket()) {
         client.setReuseAddress(true);
-        client.connect((new InetSocketAddress(groupInfo.groupOwnerAddress.getHostAddress(), PEER_HANDSHAKE_PORT)), 15000);
+        client.connect((new InetSocketAddress(groupInfo.groupOwnerAddress.getHostAddress(),
+            PEER_HANDSHAKE_PORT)), 15000);
 
         ObjectOutputStream objectOutputStream = new ObjectOutputStream(client.getOutputStream());
-        objectOutputStream.writeObject(HANDSHAKE_MESSAGE); // Send message for the peer device to verify
+        objectOutputStream.writeObject(
+            HANDSHAKE_MESSAGE); // Send message for the peer device to verify
 
         exchangeFileTransferMetadata(client.getOutputStream(), client.getInputStream());
 
         return groupInfo.groupOwnerAddress;
-
       } catch (Exception ex) {
         ex.printStackTrace();
         return null;
       }
-    }
+    } else {
-    else {
       return null;
     }
   }
@@ -109,16 +107,13 @@ class PeerGroupHandshakeAsyncTask extends AsyncTask<Void, Void, InetAddress> {
 
         ArrayList<Uri> fileUriList = deviceListFragment.getFileUriList();
         for (
-              Uri fileUri :fileUriList)
+            Uri fileUri : fileUriList) { // Send the names of each of those files, in order
-
-          { // Send the names of each of those files, in order
           objectOutputStream.writeObject(getFileName(fileUri));
         }
       } catch (Exception e) {
         e.printStackTrace();
       }
-      }
+    } else { // Device is not the file sender
-      else { // Device is not the file sender
       try (ObjectInputStream objectInputStream = new ObjectInputStream(inputStream)) {
         // Read the number of files
         Object totalFilesObject = objectInputStream.readObject();

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/ReceiverDeviceAsyncTask.java

@@ -29,7 +29,7 @@ import static org.kiwix.kiwixmobile.zim_manager.local_file_transfer.LocalFileTra
  *
  * A single Task is used for the entire file transfer (the server socket accepts connections as
  * many times as the no. of files).
- * */
+ */
 class ReceiverDeviceAsyncTask extends AsyncTask<Void, Integer, Boolean> {
 
   private static final String TAG = "ReceiverDeviceAsyncTask";
@@ -38,7 +38,8 @@ class ReceiverDeviceAsyncTask extends AsyncTask<Void, Integer, Boolean> {
   private TransferProgressFragment transferProgressFragment;
   private int fileItemIndex;
 
-  public ReceiverDeviceAsyncTask(DeviceListFragment deviceListFragment, TransferProgressFragment transferProgressFragment) {
+  public ReceiverDeviceAsyncTask(DeviceListFragment deviceListFragment,
+      TransferProgressFragment transferProgressFragment) {
     this.deviceListFragment = deviceListFragment;
     this.transferProgressFragment = transferProgressFragment;
   }
@@ -78,11 +79,11 @@ class ReceiverDeviceAsyncTask extends AsyncTask<Void, Integer, Boolean> {
         deviceListFragment.incrementTotalFilesSent();
       }
 
-      if(isCancelled())
+      if (isCancelled()) {
         return false; // Returned in case the task was cancelled
-      else
+      } else {
         return true;  // Returned in case of a successful file transfer
-
+      }
     } catch (IOException e) {
       Log.e(TAG, e.getMessage());
       return false; // Returned when an error was encountered during transfer
@@ -104,9 +105,11 @@ class ReceiverDeviceAsyncTask extends AsyncTask<Void, Integer, Boolean> {
     if (BuildConfig.DEBUG) Log.d(TAG, "File transfer complete");
 
     if (allFilesReceived) {
-      showToast(deviceListFragment.getActivity(), R.string.file_transfer_complete, Toast.LENGTH_LONG);
+      showToast(deviceListFragment.getActivity(), R.string.file_transfer_complete,
+          Toast.LENGTH_LONG);
     } else {
-      showToast(deviceListFragment.getActivity(), R.string.error_during_transfer, Toast.LENGTH_LONG);
+      showToast(deviceListFragment.getActivity(), R.string.error_during_transfer,
+          Toast.LENGTH_LONG);
     }
 
     ((LocalFileTransferActivity) deviceListFragment.getActivity()).closeLocalFileTransferActivity();

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/RequestEnableLocationServicesDialog.java

@@ -27,7 +27,8 @@ public class RequestEnableLocationServicesDialog extends DialogFragment {
         .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {
           @Override
           public void onClick(DialogInterface paramDialogInterface, int paramInt) {
-            startActivityForResult(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS), LocalFileTransferActivity.REQUEST_ENABLE_LOCATION_SERVICES);
+            startActivityForResult(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS),
+                LocalFileTransferActivity.REQUEST_ENABLE_LOCATION_SERVICES);
           }
         })
         .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/SenderDeviceAsyncTask.java

@@ -32,7 +32,7 @@ import static org.kiwix.kiwixmobile.zim_manager.local_file_transfer.LocalFileTra
  * on the list of files for transfer in {@link TransferProgressFragment}.
  *
  * A new task is created by the sender for every file to be transferred
- * */
+ */
 class SenderDeviceAsyncTask extends AsyncTask<Uri, Void, Boolean> {
 
   private static final String TAG = "SenderDeviceAsyncTask";
@@ -41,7 +41,8 @@ class SenderDeviceAsyncTask extends AsyncTask<Uri, Void, Boolean> {
   private TransferProgressFragment transferProgressFragment;
   private int fileItemIndex;
 
-  public SenderDeviceAsyncTask(DeviceListFragment deviceListFragment, TransferProgressFragment transferProgressFragment, int fileItemIndex) {
+  public SenderDeviceAsyncTask(DeviceListFragment deviceListFragment,
+      TransferProgressFragment transferProgressFragment, int fileItemIndex) {
     this.deviceListFragment = deviceListFragment;
     this.transferProgressFragment = transferProgressFragment;
     this.fileItemIndex = fileItemIndex;
@@ -57,7 +58,9 @@ class SenderDeviceAsyncTask extends AsyncTask<Uri, Void, Boolean> {
     Uri fileUri = fileUris[0];    // Uri of file to be transferred
     ContentResolver contentResolver = deviceListFragment.getActivity().getContentResolver();
 
-    try (Socket socket = new Socket(); InputStream fileInputStream = contentResolver.openInputStream(fileUri)) { // Represents the sender device
+    try (Socket socket = new Socket();
+         InputStream fileInputStream = contentResolver.openInputStream(
+             fileUri)) { // Represents the sender device
 
       if (isCancelled()) {
         return false;
@@ -75,7 +78,6 @@ class SenderDeviceAsyncTask extends AsyncTask<Uri, Void, Boolean> {
       if (BuildConfig.DEBUG) Log.d(TAG, "Sender: Data written");
 
       return true;
-
     } catch (IOException e) {
       Log.e(TAG, e.getMessage());
       return false;
@@ -94,12 +96,14 @@ class SenderDeviceAsyncTask extends AsyncTask<Uri, Void, Boolean> {
       transferProgressFragment.changeStatus(fileItemIndex, SENT);
     } else {
       Activity activity = deviceListFragment.getActivity();
-      showToast(activity, activity.getString(R.string.error_sending, getFileName(deviceListFragment.getFileUriList().get(fileItemIndex))), Toast.LENGTH_SHORT);
+      showToast(activity, activity.getString(R.string.error_sending,
+          getFileName(deviceListFragment.getFileUriList().get(fileItemIndex))), Toast.LENGTH_SHORT);
       transferProgressFragment.changeStatus(fileItemIndex, ERROR);
     }
 
     if (deviceListFragment.allFilesSent()) {
-      showToast(deviceListFragment.getActivity(), R.string.file_transfer_complete, Toast.LENGTH_SHORT);
+      showToast(deviceListFragment.getActivity(), R.string.file_transfer_complete,
+          Toast.LENGTH_SHORT);
       deviceListFragment.getActivity().finish();
     }
   }

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/TransferProgressFragment.java

@@ -22,7 +22,7 @@ import java.util.ArrayList;
  * Part of the local file sharing module, this fragment is used to display the progress of the
  * file transfer. It displays a list of files along with their current status (as defined in the
  * {@link FileItem} class.
- * */
+ */
 public class TransferProgressFragment extends Fragment {
 
   private static final String FILE_ITEMS = "file_items";
@@ -53,7 +53,8 @@ public class TransferProgressFragment extends Fragment {
   }
 
   @Override
-  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+  public View onCreateView(LayoutInflater inflater, ViewGroup container,
+      Bundle savedInstanceState) {
     View view = inflater.inflate(R.layout.fragment_transfer_progress, container, false);
     unbinder = ButterKnife.bind(this, view);
 

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/WifiDirectBroadcastReceiver.java

@@ -18,14 +18,15 @@ import static org.kiwix.kiwixmobile.zim_manager.local_file_transfer.LocalFileTra
  *
  * Handles the broadcasts pertaining to the wifi p2p group formed in WiFi Direct. Works along with
  * the wifi p2p manager in {@link LocalFileTransferActivity}.
- * */
+ */
 public class WifiDirectBroadcastReceiver extends BroadcastReceiver {
 
   private WifiP2pManager manager;
   private WifiP2pManager.Channel channel;
   private LocalFileTransferActivity wifiActivity;
 
-  public WifiDirectBroadcastReceiver(WifiP2pManager manager, WifiP2pManager.Channel channel, LocalFileTransferActivity activity) {
+  public WifiDirectBroadcastReceiver(WifiP2pManager manager, WifiP2pManager.Channel channel,
+      LocalFileTransferActivity activity) {
     super();
     this.manager = manager;
     this.channel = channel;
@@ -48,16 +49,16 @@ public class WifiDirectBroadcastReceiver extends BroadcastReceiver {
         wifiActivity.resetPeers();
       }
       Log.d(LocalFileTransferActivity.TAG, "WiFi P2P state changed - " + wifiP2pState);
-
     } else if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)) {
 
       if (manager != null) {
         /* List of available peers has changed, so request & use the new list through
          * PeerListListener.requestPeers() callback */
-        manager.requestPeers(channel, (WifiP2pManager.PeerListListener) wifiActivity.getSupportFragmentManager().findFragmentById(R.id.fragment_device_list));
+        manager.requestPeers(channel,
+            (WifiP2pManager.PeerListListener) wifiActivity.getSupportFragmentManager()
+                .findFragmentById(R.id.fragment_device_list));
       }
       Log.d(LocalFileTransferActivity.TAG, "P2P peers changed");
-
     } else if (WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION.equals(action)) {
 
       if (manager == null) {
@@ -67,16 +68,20 @@ public class WifiDirectBroadcastReceiver extends BroadcastReceiver {
 
       if (networkInfo.isConnected()) {
         // Request connection info about the wifi p2p group formed upon connection
-        manager.requestConnectionInfo(channel, (DeviceListFragment) wifiActivity.getSupportFragmentManager().findFragmentById(R.id.fragment_device_list));
+        manager.requestConnectionInfo(channel,
+            (DeviceListFragment) wifiActivity.getSupportFragmentManager()
+                .findFragmentById(R.id.fragment_device_list));
       } else {
         // Not connected after connection change -> Disconnected
         wifiActivity.resetData();
       }
-
     } else if (WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION.equals(action)) {
       // Update UI with wifi-direct details about the user device
-      DeviceListFragment deviceListFragment = (DeviceListFragment) wifiActivity.getSupportFragmentManager().findFragmentById(R.id.fragment_device_list);
+      DeviceListFragment deviceListFragment =
-      deviceListFragment.updateUserDevice(intent.getParcelableExtra(WifiP2pManager.EXTRA_WIFI_P2P_DEVICE));
+          (DeviceListFragment) wifiActivity.getSupportFragmentManager()
+              .findFragmentById(R.id.fragment_device_list);
+      deviceListFragment.updateUserDevice(
+          intent.getParcelableExtra(WifiP2pManager.EXTRA_WIFI_P2P_DEVICE));
     }
   }
 }

app/src/main/java/org/kiwix/kiwixmobile/zim_manager/local_file_transfer/WifiPeerListAdapter.java

@@ -23,14 +23,16 @@ import static org.kiwix.kiwixmobile.zim_manager.local_file_transfer.DeviceListFr
 /**
  * Helper class, part of the local file sharing module.
  *
- * Defines the Adapter for the list of wifi peer-device items displayed in {@link DeviceListFragment}
+ * Defines the Adapter for the list of wifi peer-device items displayed in {@link
- * */
+ * DeviceListFragment}
+ */
 public class WifiPeerListAdapter extends ArrayAdapter<WifiP2pDevice> {
 
   private Context context;
   private List<WifiP2pDevice> listItems;
 
-  public WifiPeerListAdapter(@NonNull Context context, int resource, @NonNull List<WifiP2pDevice> objects) {
+  public WifiPeerListAdapter(@NonNull Context context, int resource,
+      @NonNull List<WifiP2pDevice> objects) {
     super(context, resource, objects);
     this.context = context;
     this.listItems = objects;