messenger-android

Android graphical user interfaces for GNUnet Messenger
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LobbyDisplayFragment.kt (2974B)

      1 /*
      2    This file is part of GNUnet.
      3    Copyright (C) 2021--2025 GNUnet e.V.
      4 
      5    GNUnet is free software: you can redistribute it and/or modify it
      6    under the terms of the GNU Affero General Public License as published
      7    by the Free Software Foundation, either version 3 of the License,
      8    or (at your option) any later version.
      9 
     10    GNUnet is distributed in the hope that it will be useful, but
     11    WITHOUT ANY WARRANTY; without even the implied warranty of
     12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13    Affero General Public License for more details.
     14 
     15    You should have received a copy of the GNU Affero General Public License
     16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
     17 
     18    SPDX-License-Identifier: AGPL3.0-or-later
     19  */
     20 /*
     21  * @author t3sserakt
     22  * @file GNUnetMessenger/app/src/main/java/org/gnunet/gnunetmessenger/ui/account/LobbyDisplayFragment.kt
     23  */
     24 
     25 package org.gnunet.gnunetmessenger.ui.account
     26 
     27 import android.content.ClipboardManager
     28 import android.content.ClipData
     29 import android.graphics.Bitmap
     30 import android.graphics.Color
     31 import android.os.Bundle
     32 import android.view.LayoutInflater
     33 import android.view.View
     34 import android.view.ViewGroup
     35 import android.widget.Button
     36 import android.widget.TextView
     37 import android.widget.ImageView
     38 import androidx.core.content.ContextCompat
     39 import androidx.fragment.app.Fragment
     40 import androidx.navigation.fragment.findNavController
     41 import com.google.zxing.BarcodeFormat
     42 import com.google.zxing.qrcode.QRCodeWriter
     43 import org.gnunet.gnunetmessenger.R
     44 
     45 class LobbyDisplayFragment : Fragment() {
     46 
     47     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
     48         val view = inflater.inflate(R.layout.fragment_lobby_display, container, false)
     49 
     50         val lobbyId = arguments?.getString("lobbyId") ?: "N/A"
     51 
     52         view.findViewById<TextView>(R.id.lobby_id_text).text = "Lobby ID: $lobbyId"
     53 
     54         val qrBitmap = generateQrCode(lobbyId)
     55         view.findViewById<ImageView>(R.id.lobby_qr).setImageBitmap(qrBitmap)
     56 
     57         view.findViewById<Button>(R.id.btn_cancel).setOnClickListener {
     58             findNavController().popBackStack()
     59         }
     60 
     61         view.findViewById<Button>(R.id.btn_copy).setOnClickListener {
     62             val clipboard = ContextCompat.getSystemService(requireContext(), ClipboardManager::class.java)
     63             val clip = ClipData.newPlainText("Lobby ID", lobbyId)
     64             clipboard?.setPrimaryClip(clip)
     65         }
     66 
     67         return view
     68     }
     69 
     70     private fun generateQrCode(text: String): Bitmap {
     71         val size = 512
     72         val bits = QRCodeWriter().encode(text, BarcodeFormat.QR_CODE, size, size)
     73         val bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.RGB_565)
     74         for (x in 0 until size) {
     75             for (y in 0 until size) {
     76                 bitmap.setPixel(x, y, if (bits[x, y]) Color.BLACK else Color.WHITE)
     77             }
     78         }
     79         return bitmap
     80     }
     81 }