Added scanner for qr codes and updated logo

.idea/deploymentTargetDropDown.xml

@@ -15,7 +15,7 @@
               </deviceKey>
             </Target>
           </targetSelectedWithDropDown>
-          <timeTargetWasSelectedWithDropDown value="2024-02-24T17:02:56.140502018Z" />
+          <timeTargetWasSelectedWithDropDown value="2024-02-26T15:23:42.854086595Z" />
         </State>
       </entry>
     </value>

app/build.gradle.kts

@@ -72,4 +72,10 @@ dependencies {
     ksp("io.github.raamcosta.compose-destinations:ksp:1.0.2-beta")
 
     implementation("androidx.compose.material:material-icons-extended:1.6.2")
+
+    implementation("com.google.accompanist:accompanist-permissions:0.34.0")
+    implementation("androidx.camera:camera-camera2:1.3.1")
+    implementation("androidx.camera:camera-lifecycle:1.3.1")
+    implementation("androidx.camera:camera-view:1.3.1")
+    implementation("com.google.mlkit:barcode-scanning:17.2.0")
 }

app/src/main/AndroidManifest.xml

@@ -2,6 +2,10 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-feature android:name="android.hardware.camera"/>
+    <uses-feature android:name="android.hardware.camera.autofocus"/>
+    <uses-permission android:name="android.permission.CAMERA"/>
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -15,7 +19,6 @@
         <activity
             android:name=".MainActivity"
             android:exported="true"
-            android:label="@string/app_name"
             android:theme="@style/Theme.FlowSchool">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/CameraScreen.kt

@@ -0,0 +1,56 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import android.util.Log
+import androidx.camera.core.CameraSelector
+import androidx.camera.core.ImageAnalysis
+import androidx.camera.core.Preview
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.camera.view.PreviewView
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalLifecycleOwner
+import androidx.compose.ui.viewinterop.AndroidView
+import androidx.core.content.ContextCompat
+import it.edu.cassandroferminervi.flowschool.util.QrAnalyzer
+
+@Composable
+fun CameraScreen() {
+    val localContext = LocalContext.current
+    val lifecycleOwner = LocalLifecycleOwner.current
+    val cameraProviderFuture = remember {
+        ProcessCameraProvider.getInstance(localContext)
+    }
+    AndroidView(
+        modifier = Modifier.fillMaxSize(),
+        factory = { context ->
+            val previewView = PreviewView(context)
+            val preview = Preview.Builder().build()
+            val selector = CameraSelector.Builder()
+                .requireLensFacing(CameraSelector.LENS_FACING_BACK)
+                .build()
+
+            preview.setSurfaceProvider(previewView.surfaceProvider)
+
+            val imageAnalysis = ImageAnalysis.Builder().build()
+            imageAnalysis.setAnalyzer(
+                ContextCompat.getMainExecutor(context),
+                QrAnalyzer(context)
+            )
+
+            runCatching {
+                cameraProviderFuture.get().bindToLifecycle(
+                    lifecycleOwner,
+                    selector,
+                    preview,
+                    imageAnalysis
+                )
+            }.onFailure {
+                Log.e("CAMERA", "Camera bind error ${it.localizedMessage}", it)
+            }
+            previewView
+        }
+    )
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/HomeScreen.kt

@@ -0,0 +1,41 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Button
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import com.ramcosta.composedestinations.PermissionScreenDestination
+import com.ramcosta.composedestinations.SearchingScreenDestination
+import com.ramcosta.composedestinations.annotation.Destination
+import com.ramcosta.composedestinations.navigation.DestinationsNavigator
+
+@Destination
+@Composable
+fun HomeScreen(navigator: DestinationsNavigator) {
+    Column(
+        verticalArrangement = Arrangement.Center,
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(horizontal = 50.dp)
+    ) {
+        Button(onClick = {
+            navigator.navigate(PermissionScreenDestination)
+        }, modifier = Modifier.align(Alignment.CenterHorizontally)) {
+            Text("Scannerizza codice QR")
+        }
+        Spacer(modifier = Modifier.height(8.dp))
+        Button(onClick = {
+            navigator.navigate(SearchingScreenDestination)
+        }, modifier = Modifier.align(Alignment.CenterHorizontally)) {
+            Text("Cerca professore")
+        }
+    }
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/LoginScreen.kt

@@ -1,4 +1,4 @@
-package it.edu.cassandroferminervi.flowschool
+package it.edu.cassandroferminervi.flowschool.screens
 
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.Arrangement
@@ -9,6 +9,7 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Visibility
@@ -25,6 +26,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.input.PasswordVisualTransformation
@@ -33,6 +35,7 @@ import androidx.compose.ui.unit.dp
 import com.ramcosta.composedestinations.HomeScreenDestination
 import com.ramcosta.composedestinations.annotation.Destination
 import com.ramcosta.composedestinations.navigation.DestinationsNavigator
+import it.edu.cassandroferminervi.flowschool.R
 
 @Destination(start = true)
 @Composable
@@ -50,8 +53,10 @@ fun LoginScreen(navigator: DestinationsNavigator) {
         Image(
             painterResource(id = R.drawable.logo),
             contentDescription = "Logo",
-            //alignment = Alignment.Center,
+            Modifier
-            Modifier.size(192.dp).align(Alignment.CenterHorizontally)
+                .size(192.dp)
+                .align(Alignment.CenterHorizontally)
+                .clip(CircleShape)
         )
         Spacer(modifier = Modifier.height(64.dp))
         TextField(

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/PermissionScreen.kt

@@ -0,0 +1,39 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import com.google.accompanist.permissions.ExperimentalPermissionsApi
+import com.google.accompanist.permissions.isGranted
+import com.google.accompanist.permissions.rememberPermissionState
+import com.google.accompanist.permissions.shouldShowRationale
+import com.ramcosta.composedestinations.annotation.Destination
+
+@OptIn(ExperimentalPermissionsApi::class)
+@Destination
+@Composable
+fun PermissionScreen() {
+    val cameraPermissionState = rememberPermissionState(android.Manifest.permission.CAMERA)
+
+    if (cameraPermissionState.status.isGranted) {
+        CameraScreen()
+    } else {
+        Box (
+            contentAlignment = Alignment.Center,
+            modifier = Modifier.fillMaxSize()
+        ) {
+            if (cameraPermissionState.status.shouldShowRationale) {
+                Text("Attiva il permesso per la fotocamera dalle impostazioni")
+            } else {
+                SideEffect {
+                    cameraPermissionState.run { launchPermissionRequest() }
+                }
+                Text("Permessi disattivati per la fotocamera")
+            }
+        }
+    }
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/SearchingScreen.kt

@@ -1,4 +1,4 @@
-package it.edu.cassandroferminervi.flowschool
+package it.edu.cassandroferminervi.flowschool.screens
 
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
@@ -7,15 +7,14 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import com.ramcosta.composedestinations.annotation.Destination
-import com.ramcosta.composedestinations.navigation.DestinationsNavigator
 
 @Destination
 @Composable
-fun HomeScreen(navigator: DestinationsNavigator) {
+fun SearchingScreen() {
     Box (
         contentAlignment = Alignment.Center,
         modifier = Modifier.fillMaxSize()
     ) {
-        Text("Home page")
+        Text("Searching screen")
     }
 }

app/src/main/java/it/edu/cassandroferminervi/flowschool/util/QrAnalyzer.kt

@@ -0,0 +1,40 @@
+package it.edu.cassandroferminervi.flowschool.util
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.widget.Toast
+import androidx.camera.core.ImageAnalysis
+import androidx.camera.core.ImageProxy
+import com.google.mlkit.vision.barcode.BarcodeScannerOptions
+import com.google.mlkit.vision.barcode.BarcodeScanning
+import com.google.mlkit.vision.barcode.common.Barcode
+import com.google.mlkit.vision.common.InputImage
+
+class QrAnalyzer(private val context: Context) : ImageAnalysis.Analyzer {
+    private val options = BarcodeScannerOptions.Builder()
+        .setBarcodeFormats(Barcode.FORMAT_QR_CODE)
+        .build()
+
+    private val scanner = BarcodeScanning.getClient(options)
+
+    @SuppressLint("UnsafeOptInUsageError")
+    override fun analyze(imageProxy: ImageProxy) {
+        imageProxy.image
+            ?.let { image ->
+                scanner.process(
+                    InputImage.fromMediaImage(
+                        image, imageProxy.imageInfo.rotationDegrees
+                    )
+                ).addOnSuccessListener { barcode ->
+                    barcode?.takeIf { it.isNotEmpty() }
+                        ?.mapNotNull { it.rawValue }
+                        ?.joinToString(",")
+                        ?.let { Toast.makeText(context, it, Toast.LENGTH_SHORT).show() }
+                }.addOnCompleteListener {
+                    imageProxy.close()
+                }
+            }
+    }
+
+
+}