Add a button to take a picture from camera

amethyst/build.gradle

@@ -299,5 +299,12 @@ dependencies {
     debugImplementation platform(libs.androidx.compose.bom)
     debugImplementation libs.androidx.ui.tooling
     debugImplementation libs.androidx.ui.test.manifest
+
+    def camerax_version = "1.3.4"
+    implementation "androidx.camera:camera-core:$camerax_version"
+    implementation "androidx.camera:camera-camera2:$camerax_version"
+    implementation "androidx.camera:camera-lifecycle:$camerax_version"
+    implementation "androidx.camera:camera-view:$camerax_version"
+    implementation "androidx.camera:camera-extensions:$camerax_version"
 }
 

amethyst/src/main/AndroidManifest.xml

@@ -16,6 +16,9 @@
     <!-- To connect with relays -->
     <uses-permission android:name="android.permission.INTERNET"/>
 
+    <!-- To take pictures -->
+    <uses-permission android:name="android.permission.CAMERA" />
+
     <!-- To Upload media (newer devices) -->
     <uses-permission android:name="android.permission.READ_MEDIA_IMAGES"/>
     <uses-permission android:name="android.permission.READ_MEDIA_VIDEO"/>
@@ -121,6 +124,16 @@
             </intent-filter>
         </service>
 
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.provider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
+
     </application>
 
 </manifest>

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewPostView.kt

@@ -24,9 +24,12 @@ import android.Manifest
 import android.graphics.Bitmap
 import android.net.Uri
 import android.os.Build
+import android.os.Environment
 import android.util.Log
 import android.util.Size
 import android.widget.Toast
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.border
@@ -56,6 +59,7 @@ import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Bolt
+import androidx.compose.material.icons.filled.CameraAlt
 import androidx.compose.material.icons.filled.CurrencyBitcoin
 import androidx.compose.material.icons.filled.LocationOff
 import androidx.compose.material.icons.filled.LocationOn
@@ -117,6 +121,8 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.window.Dialog
 import androidx.compose.ui.window.DialogProperties
+import androidx.core.content.FileProvider
+import androidx.lifecycle.compose.LocalLifecycleOwner
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
 import coil.compose.AsyncImage
@@ -180,7 +186,11 @@ import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.debounce
 import kotlinx.coroutines.flow.receiveAsFlow
 import kotlinx.coroutines.launch
+import java.io.File
 import java.lang.Math.round
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
 
 @OptIn(ExperimentalMaterial3Api::class, FlowPreview::class)
 @Composable
@@ -195,6 +205,7 @@ fun NewPostView(
     accountViewModel: AccountViewModel,
     nav: (String) -> Unit,
 ) {
+    val lifecycleOwner = LocalLifecycleOwner.current
     val postViewModel: NewPostViewModel = viewModel()
     postViewModel.wantsDirectMessage = enableMessageInterface
 
@@ -204,6 +215,9 @@ fun NewPostView(
     val scope = rememberCoroutineScope()
     var showRelaysDialog by remember { mutableStateOf(false) }
     var relayList = remember { accountViewModel.account.activeWriteRelays().toImmutableList() }
+    var showCamera by remember {
+        mutableStateOf(true)
+    }
 
     LaunchedEffect(key1 = postViewModel.draftTag) {
         launch(Dispatchers.IO) {
@@ -561,7 +575,6 @@ fun NewPostView(
 @Composable
 private fun BottomRowActions(postViewModel: NewPostViewModel) {
     val scrollState = rememberScrollState()
-
     Row(
         modifier =
             Modifier
@@ -578,6 +591,12 @@ private fun BottomRowActions(postViewModel: NewPostViewModel) {
             postViewModel.selectImage(it)
         }
 
+        TakePictureButton(
+            onPictureTaken = {
+                postViewModel.selectImage(it)
+            },
+        )
+
         if (postViewModel.canUsePoll) {
             // These should be hashtag recommendations the user selects in the future.
             // val hashtag = stringRes(R.string.poll_hashtag)
@@ -623,6 +642,64 @@ private fun BottomRowActions(postViewModel: NewPostViewModel) {
     }
 }
 
+@OptIn(ExperimentalPermissionsApi::class)
+@Composable
+fun TakePictureButton(onPictureTaken: (Uri) -> Unit) {
+    var imageUri by remember { mutableStateOf<Uri?>(null) }
+    val launcher =
+        rememberLauncherForActivityResult(
+            contract = ActivityResultContracts.TakePicture(),
+        ) { success ->
+            if (success) {
+                imageUri?.let {
+                    onPictureTaken(it)
+                }
+            }
+        }
+    val context = LocalContext.current
+    val cameraPermissionState =
+        rememberPermissionState(
+            Manifest.permission.CAMERA,
+        )
+
+    Box {
+        IconButton(
+            modifier = Modifier.align(Alignment.Center),
+            onClick = {
+                if (cameraPermissionState.status.isGranted) {
+                    val timeStamp: String = SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US).format(Date())
+                    val storageDir: File? = context.getExternalFilesDir(Environment.DIRECTORY_PICTURES)
+                    File
+                        .createTempFile(
+                            "JPEG_${timeStamp}_",
+                            ".jpg",
+                            storageDir,
+                        ).apply {
+                            imageUri =
+                                FileProvider.getUriForFile(
+                                    context,
+                                    "${context.packageName}.provider",
+                                    this,
+                                )
+                        }
+                    imageUri?.let {
+                        launcher.launch(it)
+                    }
+                } else {
+                    cameraPermissionState.launchPermissionRequest()
+                }
+            },
+        ) {
+            Icon(
+                imageVector = Icons.Default.CameraAlt,
+                contentDescription = stringRes(id = R.string.upload_image),
+                modifier = Modifier.height(25.dp),
+                tint = MaterialTheme.colorScheme.onBackground,
+            )
+        }
+    }
+}
+
 @Composable
 private fun PollField(postViewModel: NewPostViewModel) {
     val optionsList = postViewModel.pollOptions

amethyst/src/main/res/xml/file_paths.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <external-path
+        name="external_files"
+        path="." />
+</paths>