QRCode: generate and scan QRCodes

vector/build.gradle

@@ -351,6 +351,10 @@ dependencies {
 
     implementation "androidx.emoji:emoji-appcompat:1.0.0"
 
+    // QR-code
+    implementation 'com.google.zxing:core:3.4.0'
+    implementation 'me.dm7.barcodescanner:zxing:1.9.13'
+
     // TESTS
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.2.0'

vector/src/debug/java/im/vector/riotx/features/debug/DebugMenuActivity.kt

@@ -16,6 +16,7 @@
 
 package im.vector.riotx.features.debug
 
+import android.app.Activity
 import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.content.Context
@@ -37,7 +38,15 @@ import im.vector.riotx.R
 import im.vector.riotx.core.di.ActiveSessionHolder
 import im.vector.riotx.core.di.ScreenComponent
 import im.vector.riotx.core.platform.VectorBaseActivity
+import im.vector.riotx.core.qrcode.createQrCode
+import im.vector.riotx.core.utils.PERMISSIONS_FOR_TAKING_PHOTO
+import im.vector.riotx.core.utils.PERMISSION_REQUEST_CODE_LAUNCH_CAMERA
+import im.vector.riotx.core.utils.allGranted
+import im.vector.riotx.core.utils.checkPermissions
+import im.vector.riotx.core.utils.toast
 import im.vector.riotx.features.debug.sas.DebugSasEmojiActivity
+import im.vector.riotx.features.qrcode.QrCodeScannerActivity
+import kotlinx.android.synthetic.debug.activity_debug_menu.*
 import javax.inject.Inject
 
 class DebugMenuActivity : VectorBaseActivity() {
@@ -51,6 +60,15 @@ class DebugMenuActivity : VectorBaseActivity() {
         injector.inject(this)
     }
 
+    override fun initUiAndData() {
+        renderQrCode("https://www.example.org")
+    }
+
+    private fun renderQrCode(text: String) {
+        val qrBitmap = createQrCode(text)
+        debug_qr_code.setImageBitmap(qrBitmap)
+    }
+
     @OnClick(R.id.debug_test_text_view_link)
     fun testTextViewLink() {
         startActivity(Intent(this, TestLinkifyActivity::class.java))
@@ -214,4 +232,37 @@ class DebugMenuActivity : VectorBaseActivity() {
             }
         })
     }
+
+    @OnClick(R.id.debug_scan_qr_code)
+    fun scanQRCode() {
+        if (checkPermissions(PERMISSIONS_FOR_TAKING_PHOTO, this, PERMISSION_REQUEST_CODE_LAUNCH_CAMERA)) {
+            doScanQRCode()
+        }
+    }
+
+    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+
+        if (requestCode == PERMISSION_REQUEST_CODE_LAUNCH_CAMERA && allGranted(grantResults)) {
+            doScanQRCode()
+        }
+    }
+
+    private fun doScanQRCode() {
+        QrCodeScannerActivity.startForResult(this)
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        if (resultCode == Activity.RESULT_OK) {
+            when (requestCode) {
+                QrCodeScannerActivity.QR_CODE_SCANNER_REQUEST_CODE -> {
+                    toast("QrCode: " + QrCodeScannerActivity.getResultText(data) + " is QRCode: " + QrCodeScannerActivity.getResultIsQrCode(data))
+
+                    // Also update the current QR Code (reverse operation)
+                    renderQrCode(QrCodeScannerActivity.getResultText(data) ?: "")
+                }
+            }
+        }
+    }
 }

vector/src/debug/res/layout/activity_debug_menu.xml

@@ -68,6 +68,19 @@
                 android:layout_height="wrap_content"
                 android:text="Initialize XSigning" />
 
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/debug_scan_qr_code"
+                style="@style/VectorButtonStyle"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="Scan QR-code" />
+
+            <ImageView
+                android:id="@+id/debug_qr_code"
+                android:layout_width="200dp"
+                android:layout_height="200dp"
+                tools:src="@tools:sample/avatars" />
+
         </LinearLayout>
 
     </ScrollView>

vector/src/main/AndroidManifest.xml

@@ -7,6 +7,7 @@
     <uses-permission android:name="android.permission.READ_CONTACTS" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.VIBRATE" />
+    <uses-permission android:name="android.permission.CAMERA" />
 
     <application
         android:name=".VectorApplication"
@@ -123,13 +124,16 @@
             </intent-filter>
         </activity>
 
-        <activity android:name=".features.roommemberprofile.RoomMemberProfileActivity"
+        <activity
+            android:name=".features.roommemberprofile.RoomMemberProfileActivity"
             android:parentActivityName=".features.home.HomeActivity">
             <meta-data
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value=".features.home.HomeActivity" />
         </activity>
 
+        <activity android:name=".features.qrcode.QrCodeScannerActivity" />
+
         <!-- Services -->
 
         <service

vector/src/main/assets/open_source_licenses.html

@@ -364,6 +364,16 @@ SOFTWARE.
         <br/>
         Copyright 2017 Sergiy Kovalchuk
     </li>
+    <li>
+        <b>ZXing</b>
+        <br/>
+        Copyright 2007 ZXing authors
+    </li>
+    <li>
+        <b>barcodescanner</b>
+        <br/>
+        Copyright (c) 2014 Dushyanth Maguluru
+    </li>
 </ul>
 <pre>
 Apache License

vector/src/main/java/im/vector/riotx/core/di/FragmentModule.kt

@@ -22,32 +22,50 @@ import androidx.fragment.app.FragmentFactory
 import dagger.Binds
 import dagger.Module
 import dagger.multibindings.IntoMap
+import im.vector.riotx.features.createdirect.CreateDirectRoomDirectoryUsersFragment
+import im.vector.riotx.features.createdirect.CreateDirectRoomKnownUsersFragment
 import im.vector.riotx.features.crypto.keysbackup.settings.KeysBackupSettingsFragment
 import im.vector.riotx.features.crypto.verification.choose.VerificationChooseMethodFragment
 import im.vector.riotx.features.crypto.verification.conclusion.VerificationConclusionFragment
 import im.vector.riotx.features.crypto.verification.emoji.VerificationEmojiCodeFragment
 import im.vector.riotx.features.crypto.verification.request.VerificationRequestFragment
+import im.vector.riotx.features.grouplist.GroupListFragment
 import im.vector.riotx.features.home.HomeDetailFragment
 import im.vector.riotx.features.home.HomeDrawerFragment
 import im.vector.riotx.features.home.LoadingFragment
-import im.vector.riotx.features.createdirect.CreateDirectRoomDirectoryUsersFragment
-import im.vector.riotx.features.createdirect.CreateDirectRoomKnownUsersFragment
-import im.vector.riotx.features.grouplist.GroupListFragment
 import im.vector.riotx.features.home.room.breadcrumbs.BreadcrumbsFragment
 import im.vector.riotx.features.home.room.detail.RoomDetailFragment
 import im.vector.riotx.features.home.room.list.RoomListFragment
-import im.vector.riotx.features.login.*
+import im.vector.riotx.features.login.LoginCaptchaFragment
+import im.vector.riotx.features.login.LoginFragment
+import im.vector.riotx.features.login.LoginGenericTextInputFormFragment
+import im.vector.riotx.features.login.LoginResetPasswordFragment
+import im.vector.riotx.features.login.LoginResetPasswordMailConfirmationFragment
+import im.vector.riotx.features.login.LoginResetPasswordSuccessFragment
+import im.vector.riotx.features.login.LoginServerSelectionFragment
+import im.vector.riotx.features.login.LoginServerUrlFormFragment
+import im.vector.riotx.features.login.LoginSignUpSignInSelectionFragment
+import im.vector.riotx.features.login.LoginSplashFragment
+import im.vector.riotx.features.login.LoginWaitForEmailFragment
+import im.vector.riotx.features.login.LoginWebFragment
 import im.vector.riotx.features.login.terms.LoginTermsFragment
-import im.vector.riotx.features.roommemberprofile.RoomMemberProfileFragment
+import im.vector.riotx.features.qrcode.QrCodeScannerFragment
 import im.vector.riotx.features.reactions.EmojiChooserFragment
 import im.vector.riotx.features.reactions.EmojiSearchResultFragment
 import im.vector.riotx.features.roomdirectory.PublicRoomsFragment
 import im.vector.riotx.features.roomdirectory.createroom.CreateRoomFragment
 import im.vector.riotx.features.roomdirectory.picker.RoomDirectoryPickerFragment
 import im.vector.riotx.features.roomdirectory.roompreview.RoomPreviewNoPreviewFragment
+import im.vector.riotx.features.roommemberprofile.RoomMemberProfileFragment
 import im.vector.riotx.features.roomprofile.RoomProfileFragment
 import im.vector.riotx.features.roomprofile.members.RoomMemberListFragment
-import im.vector.riotx.features.settings.*
+import im.vector.riotx.features.settings.VectorSettingsAdvancedNotificationPreferenceFragment
+import im.vector.riotx.features.settings.VectorSettingsHelpAboutFragment
+import im.vector.riotx.features.settings.VectorSettingsLabsFragment
+import im.vector.riotx.features.settings.VectorSettingsNotificationPreferenceFragment
+import im.vector.riotx.features.settings.VectorSettingsNotificationsTroubleshootFragment
+import im.vector.riotx.features.settings.VectorSettingsPreferencesFragment
+import im.vector.riotx.features.settings.VectorSettingsSecurityPrivacyFragment
 import im.vector.riotx.features.settings.devices.VectorSettingsDevicesFragment
 import im.vector.riotx.features.settings.ignored.VectorSettingsIgnoredUsersFragment
 import im.vector.riotx.features.settings.push.PushGatewaysFragment
@@ -296,4 +314,9 @@ interface FragmentModule {
     @IntoMap
     @FragmentKey(VerificationConclusionFragment::class)
     fun bindVerificationConclusionFragment(fragment: VerificationConclusionFragment): Fragment
+
+    @Binds
+    @IntoMap
+    @FragmentKey(QrCodeScannerFragment::class)
+    fun bindQrCodeScannerFragment(fragment: QrCodeScannerFragment): Fragment
 }

vector/src/main/java/im/vector/riotx/core/di/ScreenComponent.kt

@@ -24,12 +24,12 @@ import dagger.Component
 import im.vector.riotx.core.error.ErrorFormatter
 import im.vector.riotx.core.preference.UserAvatarPreference
 import im.vector.riotx.features.MainActivity
+import im.vector.riotx.features.createdirect.CreateDirectRoomActivity
 import im.vector.riotx.features.crypto.keysbackup.settings.KeysBackupManageActivity
 import im.vector.riotx.features.crypto.verification.VerificationBottomSheet
 import im.vector.riotx.features.debug.DebugMenuActivity
 import im.vector.riotx.features.home.HomeActivity
 import im.vector.riotx.features.home.HomeModule
-import im.vector.riotx.features.createdirect.CreateDirectRoomActivity
 import im.vector.riotx.features.home.room.detail.readreceipts.DisplayReadReceiptsBottomSheet
 import im.vector.riotx.features.home.room.detail.timeline.action.MessageActionsBottomSheet
 import im.vector.riotx.features.home.room.detail.timeline.edithistory.ViewEditHistoryBottomSheet
@@ -44,6 +44,7 @@ import im.vector.riotx.features.media.ImageMediaViewerActivity
 import im.vector.riotx.features.media.VideoMediaViewerActivity
 import im.vector.riotx.features.navigation.Navigator
 import im.vector.riotx.features.permalink.PermalinkHandlerActivity
+import im.vector.riotx.features.qrcode.QrCodeScannerActivity
 import im.vector.riotx.features.rageshake.BugReportActivity
 import im.vector.riotx.features.rageshake.BugReporter
 import im.vector.riotx.features.rageshake.RageShake
@@ -140,6 +141,8 @@ interface ScreenComponent {
 
     fun inject(permalinkHandlerActivity: PermalinkHandlerActivity)
 
+    fun inject(activity: QrCodeScannerActivity)
+
     fun inject(activity: DebugMenuActivity)
 
     @Component.Factory

vector/src/main/java/im/vector/riotx/core/qrcode/QrCode.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2020 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.riotx.core.qrcode
+
+import android.graphics.Bitmap
+import android.graphics.Color
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.common.BitMatrix
+import com.google.zxing.qrcode.QRCodeWriter
+
+fun createQrCode(url: String,
+                 width: Int = 200,
+                 height: Int = 200): Bitmap {
+    return QRCodeWriter().encode(
+            url,
+            BarcodeFormat.QR_CODE,
+            width,
+            height
+    ).toBitmap()
+}
+
+fun BitMatrix.toBitmap(): Bitmap {
+    val height: Int = height
+    val width: Int = width
+    val bmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565)
+    for (x in 0 until width) {
+        for (y in 0 until height) {
+            bmp.setPixel(x, y, if (get(x, y)) Color.BLACK else Color.WHITE)
+        }
+    }
+
+    return bmp
+}

vector/src/main/java/im/vector/riotx/features/qrcode/QrCodeScannerActivity.kt

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2020 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.riotx.features.qrcode
+
+import android.app.Activity
+import android.content.Intent
+import android.os.Bundle
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.Result
+import im.vector.riotx.R
+import im.vector.riotx.core.di.ScreenComponent
+import im.vector.riotx.core.extensions.replaceFragment
+import im.vector.riotx.core.platform.VectorBaseActivity
+
+class QrCodeScannerActivity : VectorBaseActivity() {
+
+    override fun getLayoutRes() = R.layout.activity_simple
+
+    override fun injectWith(injector: ScreenComponent) {
+        injector.inject(this)
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        if (isFirstCreation()) {
+            replaceFragment(R.id.simpleFragmentContainer, QrCodeScannerFragment::class.java)
+        }
+    }
+
+    fun setResultAndFinish(result: Result?) {
+        result?.let {
+            setResult(RESULT_OK, Intent().apply {
+                putExtra(EXTRA_OUT_TEXT, it.text)
+                putExtra(EXTRA_OUT_IS_QR_CODE, it.barcodeFormat == BarcodeFormat.QR_CODE)
+            })
+        }
+        finish()
+    }
+
+    companion object {
+        private const val EXTRA_OUT_TEXT = "EXTRA_OUT_TEXT"
+        private const val EXTRA_OUT_IS_QR_CODE = "EXTRA_OUT_IS_QR_CODE"
+
+        const val QR_CODE_SCANNER_REQUEST_CODE = 429
+
+        fun startForResult(activity: Activity, requestCode: Int = QR_CODE_SCANNER_REQUEST_CODE) {
+            activity.startActivityForResult(Intent(activity, QrCodeScannerActivity::class.java), requestCode)
+        }
+
+        fun getResultText(data: Intent?): String? {
+            return data?.getStringExtra(EXTRA_OUT_TEXT)
+        }
+
+        fun getResultIsQrCode(data: Intent?): Boolean {
+            return data?.getBooleanExtra(EXTRA_OUT_IS_QR_CODE, false) == true
+        }
+    }
+}

vector/src/main/java/im/vector/riotx/features/qrcode/QrCodeScannerFragment.kt

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2020 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.riotx.features.qrcode
+
+import com.google.zxing.Result
+import im.vector.riotx.R
+import im.vector.riotx.core.platform.VectorBaseFragment
+import kotlinx.android.synthetic.main.fragment_qr_code_scanner.*
+import me.dm7.barcodescanner.zxing.ZXingScannerView
+import javax.inject.Inject
+
+class QrCodeScannerFragment @Inject constructor()
+    : VectorBaseFragment(),
+        ZXingScannerView.ResultHandler {
+
+    override fun getLayoutResId() = R.layout.fragment_qr_code_scanner
+
+    override fun onResume() {
+        super.onResume()
+        // Register ourselves as a handler for scan results.
+        scannerView.setResultHandler(this)
+        // Start camera on resume
+        scannerView.startCamera()
+    }
+
+    override fun onPause() {
+        super.onPause()
+        // Stop camera on pause
+        scannerView.stopCamera()
+    }
+
+    override fun handleResult(rawResult: Result?) {
+        // Do something with the result here
+        // This is not intended to be used outside of QrCodeScannerActivity for the moment
+        (requireActivity() as? QrCodeScannerActivity)?.setResultAndFinish(rawResult)
+    }
+}

vector/src/main/res/layout/fragment_qr_code_scanner.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <me.dm7.barcodescanner.zxing.ZXingScannerView
+        android:id="@+id/scannerView"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <!-- TODO In the future we could add a toggle to switch the flash, and other possible settings -->
+
+</androidx.constraintlayout.widget.ConstraintLayout>