android: save images to Gallery (#622)

apps/android/app/src/main/AndroidManifest.xml

@@ -15,6 +15,7 @@
   <uses-permission android:name="android.permission.INTERNET" />
   <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
   <application
       android:name="SimplexApp"

apps/android/app/src/main/java/chat/simplex/app/views/chat/item/ChatItemView.kt

@@ -91,7 +91,11 @@ fun ChatItemView(
             val filePath = getLoadedFilePath(context, cItem.file)
             if (filePath != null) {
               ItemAction(stringResource(R.string.save_verb), Icons.Outlined.SaveAlt, onClick = {
-                saveFileLauncher.launch(cItem.file?.fileName)
+                when (cItem.content.msgContent) {
+                  is MsgContent.MCImage -> saveImage(context, cItem.file)
+                  is MsgContent.MCFile -> saveFileLauncher.launch(cItem.file?.fileName)
+                  else -> {}
+                }
                 showMenu.value = false
               })
             }

apps/android/app/src/main/java/chat/simplex/app/views/helpers/Share.kt

@@ -2,6 +2,7 @@ package chat.simplex.app.views.helpers
 
 import android.content.*
 import android.net.Uri
+import android.provider.MediaStore
 import android.widget.Toast
 import androidx.activity.compose.ManagedActivityResultLauncher
 import androidx.activity.compose.rememberLauncherForActivityResult
@@ -10,8 +11,7 @@ import androidx.compose.runtime.Composable
 import androidx.core.content.ContextCompat
 import chat.simplex.app.R
 import chat.simplex.app.model.CIFile
-import java.io.File
-import java.io.IOException
+import java.io.*
 
 fun shareText(cxt: Context, text: String) {
   val sendIntent: Intent = Intent().apply {
@@ -33,20 +33,16 @@ fun rememberSaveFileLauncher(cxt: Context, ciFile: CIFile?): ManagedActivityResu
   rememberLauncherForActivityResult(
     contract = ActivityResultContracts.CreateDocument(),
     onResult = { destination ->
-      if (destination != null) {
+      destination?.let {
         val filePath = getLoadedFilePath(cxt, ciFile)
         if (filePath != null) {
           val contentResolver = cxt.contentResolver
-          val file = File(filePath)
-          try {
-            val outputStream = contentResolver.openOutputStream(destination)
-            if (outputStream != null) {
-              outputStream.write(file.readBytes())
-              outputStream.close()
-              Toast.makeText(cxt, generalGetString(R.string.file_saved), Toast.LENGTH_SHORT).show()
-            }
-          } catch (e: IOException) {
-            Toast.makeText(cxt, generalGetString(R.string.error_saving_file), Toast.LENGTH_SHORT).show()
+          contentResolver.openOutputStream(destination)?.let { stream ->
+            val outputStream = BufferedOutputStream(stream)
+            val file = File(filePath)
+            outputStream.write(file.readBytes())
+            outputStream.close()
+            Toast.makeText(cxt, generalGetString(R.string.file_saved), Toast.LENGTH_SHORT).show()
           }
         } else {
           Toast.makeText(cxt, generalGetString(R.string.file_not_found), Toast.LENGTH_SHORT).show()
@@ -54,3 +50,27 @@ fun rememberSaveFileLauncher(cxt: Context, ciFile: CIFile?): ManagedActivityResu
       }
     }
   )
+
+fun saveImage(cxt: Context, ciFile: CIFile?) {
+  val filePath = getLoadedFilePath(cxt, ciFile)
+  val fileName = ciFile?.fileName
+  if (filePath != null && fileName != null) {
+    val values = ContentValues()
+    values.put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis())
+    values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg")
+    values.put(MediaStore.MediaColumns.DISPLAY_NAME, fileName)
+    values.put(MediaStore.MediaColumns.TITLE, fileName)
+    val uri = cxt.contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
+    uri?.let {
+      cxt.contentResolver.openOutputStream(uri)?.let { stream ->
+        val outputStream = BufferedOutputStream(stream)
+        val file = File(filePath)
+        outputStream.write(file.readBytes())
+        outputStream.close()
+        Toast.makeText(cxt, generalGetString(R.string.image_saved), Toast.LENGTH_SHORT).show()
+      }
+    }
+  } else {
+    Toast.makeText(cxt, generalGetString(R.string.file_not_found), Toast.LENGTH_SHORT).show()
+  }
+}

apps/android/app/src/main/res/values-ru/strings.xml

@@ -99,6 +99,7 @@
     <string name="icon_descr_image_snd_complete">Изображение отправлено</string>
     <string name="waiting_for_image">Ожидается прием изображения</string>
     <string name="image_will_be_received_when_contact_is_online">Изображение будет принято, когда ваш контакт будет в сети, подождите или проверьте позже!</string>
+    <string name="image_saved">Изображение сохранено в Галерею</string>
 
     <!-- Files - CIFileView.kt -->
     <string name="icon_descr_file">Файл</string>

apps/android/app/src/main/res/values/strings.xml

@@ -99,6 +99,7 @@
   <string name="icon_descr_image_snd_complete">Image sent</string>
   <string name="waiting_for_image">Waiting for image</string>
   <string name="image_will_be_received_when_contact_is_online">Image will be received when your contact is online, please wait or check later!</string>
+  <string name="image_saved">Image saved to Gallery</string>
 
   <!-- Files - CIFileView.kt -->
   <string name="icon_descr_file">File</string>