Fix QR code sharing

src/org/thoughtcrime/securesms/loki/redesign/activities/QRCodeActivity.kt

@@ -1,5 +1,6 @@
 package org.thoughtcrime.securesms.loki.redesign.activities
 
+import android.Manifest
 import android.content.Intent
 import android.graphics.Bitmap
 import android.graphics.Typeface
@@ -14,6 +15,7 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
+import com.tbruyelle.rxpermissions2.RxPermissions
 import kotlinx.android.synthetic.main.activity_qr_code.*
 import kotlinx.android.synthetic.main.fragment_view_my_qr_code.*
 import network.loki.messenger.R
@@ -129,21 +131,33 @@ class ViewMyQRCodeFragment : Fragment() {
     }
 
     private fun shareQRCode() {
-        val directory = File(Environment.getExternalStorageDirectory(), Environment.DIRECTORY_PICTURES)
-        val fileName = "$hexEncodedPublicKey.png"
-        val file = File(directory, fileName)
-        file.createNewFile()
-        val fos = FileOutputStream(file)
-        val size = toPx(240, resources)
-        val qrCode = QRCodeUtilities.encode(hexEncodedPublicKey, size, false)
-        qrCode.compress(Bitmap.CompressFormat.PNG, 100, fos)
-        fos.flush()
-        fos.close()
-        val intent = Intent(Intent.ACTION_SEND)
-        intent.putExtra(Intent.EXTRA_STREAM, FileProviderUtil.getUriFor(activity!!, file))
-        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
-        intent.type = "image/png"
-        startActivity(Intent.createChooser(intent, "Share QR Code"))
+        fun proceed() {
+            val directory = File(Environment.getExternalStorageDirectory(), Environment.DIRECTORY_PICTURES)
+            val fileName = "$hexEncodedPublicKey.png"
+            val file = File(directory, fileName)
+            file.createNewFile()
+            val fos = FileOutputStream(file)
+            val size = toPx(240, resources)
+            val qrCode = QRCodeUtilities.encode(hexEncodedPublicKey, size, false)
+            qrCode.compress(Bitmap.CompressFormat.PNG, 100, fos)
+            fos.flush()
+            fos.close()
+            val intent = Intent(Intent.ACTION_SEND)
+            intent.putExtra(Intent.EXTRA_STREAM, FileProviderUtil.getUriFor(activity!!, file))
+            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+            intent.type = "image/png"
+            startActivity(Intent.createChooser(intent, "Share QR Code"))
+        }
+        if (RxPermissions(this).isGranted(Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
+            proceed()
+        } else {
+            @SuppressWarnings("unused")
+            val unused = RxPermissions(this).request(Manifest.permission.WRITE_EXTERNAL_STORAGE).subscribe { isGranted ->
+                if (isGranted) {
+                    proceed()
+                }
+            }
+        }
     }
 }
 // endregion