Added resolution for no viewer app

app/src/main/java/eu/faircode/email/Helper.java

@@ -164,6 +164,9 @@ public class Helper {
     static final String LICENSE_URI = "https://www.gnu.org/licenses/gpl-3.0.html";
     static final String DONTKILL_URI = "https://dontkillmyapp.com/";
 
+    // https://developer.android.com/distribute/marketing-tools/linking-to-google-play#PerformingSearch
+    private static final String PLAY_STORE_SEARCH = "https://play.google.com/store/search";
+
     static final Pattern EMAIL_ADDRESS
             = Pattern.compile(
             "[\\S]{1,256}" +
@@ -999,24 +1002,47 @@ public class Helper {
     }
 
     static void reportNoViewer(Context context, Intent intent) {
-        StringBuilder sb = new StringBuilder();
+        View dview = LayoutInflater.from(context).inflate(R.layout.dialog_no_viewer, null);
+        TextView tvName = dview.findViewById(R.id.tvName);
+        TextView tvFullName = dview.findViewById(R.id.tvFullName);
+        TextView tvType = dview.findViewById(R.id.tvType);
 
         String title = intent.getStringExtra(Intent.EXTRA_TITLE);
-        if (TextUtils.isEmpty(title)) {
         Uri data = intent.getData();
-            if (data == null)
-                sb.append(intent.toString());
-            else
-                sb.append(data.toString());
-        } else
-            sb.append(title);
-
         String type = intent.getType();
-        if (!TextUtils.isEmpty(type))
+        String fullName = (data == null ? intent.toString() : data.toString());
-            sb.append(' ').append(type);
+        String extension = (data == null ? null : getExtension(data.getLastPathSegment()));
+
+        tvName.setText(title == null ? fullName : title);
+        tvFullName.setText(fullName);
+        tvFullName.setVisibility(title == null ? View.GONE : View.VISIBLE);
+
+        tvType.setText(type == null ? "?" : type);
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(context)
+                .setView(dview)
+                .setNegativeButton(android.R.string.cancel, null);
+
+        if (hasPlayStore(context) && !TextUtils.isEmpty(extension)) {
+            builder.setNeutralButton(R.string.title_no_viewer_search, new DialogInterface.OnClickListener() {
+                @Override
+                public void onClick(DialogInterface dialogInterface, int i) {
+                    try {
+                        Uri search = Uri.parse(PLAY_STORE_SEARCH)
+                                .buildUpon()
+                                .appendQueryParameter("q", extension)
+                                .build();
+                        Intent intent = new Intent(Intent.ACTION_VIEW, search);
+                        context.startActivity(intent);
+                    } catch (Throwable ex) {
+                        Log.e(ex);
+                        ToastEx.makeText(context, ex.toString(), Toast.LENGTH_LONG).show();
+                    }
+                }
+            });
+        }
 
-        String message = context.getString(R.string.title_no_viewer, sb.toString());
+        builder.show();
-        ToastEx.makeText(context, message, Toast.LENGTH_LONG).show();
     }
 
     static void excludeFromRecents(Context context) {

app/src/main/res/layout/dialog_no_viewer.xml

@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="utf-8"?>
+<eu.faircode.email.ScrollViewEx 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="wrap_content"
+    android:padding="24dp"
+    android:scrollbarStyle="outsideOverlay">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <eu.faircode.email.FixedTextView
+            android:id="@+id/tvCaption"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:drawableStart="@drawable/twotone_warning_24"
+            android:drawablePadding="6dp"
+            android:drawableTint="?attr/colorWarning"
+            android:text="@string/title_no_viewer_caption"
+            android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+            android:textColor="?android:attr/textColorPrimary"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <eu.faircode.email.FixedTextView
+            android:id="@+id/tvNameTitle"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="24dp"
+            android:text="@string/title_no_viewer_name"
+            android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/tvCaption" />
+
+        <eu.faircode.email.FixedTextView
+            android:id="@+id/tvName"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:text="Name"
+            android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+            android:textColor="?android:attr/textColorPrimary"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvNameTitle" />
+
+        <eu.faircode.email.FixedTextView
+            android:id="@+id/tvFullName"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="6dp"
+            android:text="Full name"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvName" />
+
+        <eu.faircode.email.FixedTextView
+            android:id="@+id/tvTypeTitle"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="24dp"
+            android:text="@string/title_no_viewer_type"
+            android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/tvFullName" />
+
+        <eu.faircode.email.FixedTextView
+            android:id="@+id/tvType"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:text="Type"
+            android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+            android:textColor="?android:attr/textColorPrimary"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvTypeTitle" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</eu.faircode.email.ScrollViewEx>

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

@@ -1050,7 +1050,10 @@
     <string name="title_hard_bounce_text" translatable="false">Your message wasn\'t delivered because the address couldn\'t be found.</string>
 
     <string name="title_no_answers">No reply templates defined</string>
-    <string name="title_no_viewer">No viewer app available for %1$s</string>
+    <string name="title_no_viewer_caption">No viewer app available</string>
+    <string name="title_no_viewer_name">Content name</string>
+    <string name="title_no_viewer_type">Content type</string>
+    <string name="title_no_viewer_search">Search app</string>
     <string name="title_no_recorder">No suitable audio recorder app available</string>
     <string name="title_no_camera">No suitable camera app available</string>
     <string name="title_no_saf">Storage access framework not available</string>