Show attachment open app

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

@@ -19,9 +19,13 @@ package eu.faircode.email;
     Copyright 2018-2020 by Marcel Bokhorst (M66B)
 */
 
+import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -32,6 +36,7 @@ import android.widget.ProgressBar;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
+import androidx.core.content.FileProvider;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.Lifecycle;
 import androidx.lifecycle.LifecycleObserver;
@@ -43,6 +48,7 @@ import androidx.recyclerview.widget.DiffUtil;
 import androidx.recyclerview.widget.ListUpdateCallback;
 import androidx.recyclerview.widget.RecyclerView;
 
+import java.io.File;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
@@ -63,6 +69,7 @@ public class AdapterAttachment extends RecyclerView.Adapter<AdapterAttachment.Vi
     public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
         private View view;
         private ImageButton ibDelete;
+        private ImageView ivType;
         private TextView tvName;
         private TextView tvSize;
         private ImageView ivStatus;
@@ -76,6 +83,7 @@ public class AdapterAttachment extends RecyclerView.Adapter<AdapterAttachment.Vi
 
             view = itemView.findViewById(R.id.clItem);
             ibDelete = itemView.findViewById(R.id.ibDelete);
+            ivType = itemView.findViewById(R.id.ivType);
             tvName = itemView.findViewById(R.id.tvName);
             tvSize = itemView.findViewById(R.id.tvSize);
             ivStatus = itemView.findViewById(R.id.ivStatus);
@@ -101,6 +109,7 @@ public class AdapterAttachment extends RecyclerView.Adapter<AdapterAttachment.Vi
             view.setAlpha(attachment.isInline() && attachment.isImage() ? Helper.LOW_LIGHT : 1.0f);
 
             ibDelete.setVisibility(readonly ? View.GONE : attachment.isInline() ? View.INVISIBLE : View.VISIBLE);
+            ivType.setImageDrawable(null);
             tvName.setText(attachment.name);
 
             if (attachment.size != null)
@@ -139,6 +148,55 @@ public class AdapterAttachment extends RecyclerView.Adapter<AdapterAttachment.Vi
 
             tvError.setText(attachment.error);
             tvError.setVisibility(attachment.error == null ? View.GONE : View.VISIBLE);
+
+            Bundle args = new Bundle();
+            args.putLong("id", attachment.id);
+            args.putSerializable("file", attachment.getFile(context));
+            args.putString("type", attachment.getMimeType());
+
+            new SimpleTask<Drawable>() {
+                @Override
+                protected Drawable onExecute(Context context, Bundle args) throws Throwable {
+                    File file = (File) args.getSerializable("file");
+                    String type = args.getString("type");
+
+                    Uri uri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID, file);
+
+                    Intent intent = new Intent(Intent.ACTION_VIEW);
+                    intent.setDataAndTypeAndNormalize(uri, type);
+
+                    PackageManager pm = context.getPackageManager();
+
+                    ComponentName component = intent.resolveActivity(pm);
+                    if (component == null)
+                        return null;
+
+                    return pm.getApplicationIcon(component.getPackageName());
+                }
+
+                @Override
+                protected void onExecuted(Bundle args, Drawable icon) {
+                    long id = args.getLong("id");
+
+                    int pos = getAdapterPosition();
+                    if (pos == RecyclerView.NO_POSITION)
+                        return;
+
+                    EntityAttachment attachment = items.get(pos);
+                    if (attachment == null || !attachment.id.equals(id))
+                        return;
+
+                    if (icon == null)
+                        ivType.setImageResource(R.drawable.baseline_attachment_24);
+                    else
+                        ivType.setImageDrawable(icon);
+                }
+
+                @Override
+                protected void onException(Bundle args, Throwable ex) {
+                    Log.unexpectedError(parentFragment.getParentFragmentManager(), ex);
+                }
+            }.execute(context, owner, args, "attachment:icon");
         }
 
         @Override

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

@@ -27,10 +27,9 @@
             app:srcCompat="@drawable/baseline_delete_24" />
 
         <ImageView
-            android:id="@+id/ivAttachments"
+            android:id="@+id/ivType"
             android:layout_width="24dp"
             android:layout_height="24dp"
-            android:contentDescription="@string/title_legend_attachment"
             app:layout_constraintBottom_toBottomOf="@+id/tvType"
             app:layout_constraintStart_toEndOf="@id/ibDelete"
             app:layout_constraintTop_toTopOf="parent"
@@ -48,7 +47,7 @@
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
             app:layout_constraintEnd_toStartOf="@+id/tvSize"
             app:layout_constraintHorizontal_weight="4"
-            app:layout_constraintStart_toEndOf="@id/ivAttachments"
+            app:layout_constraintStart_toEndOf="@id/ivType"
             app:layout_constraintTop_toTopOf="parent" />
 
         <ImageView
@@ -108,7 +107,7 @@
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
             android:textColor="?attr/colorWarning"
             app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toEndOf="@id/ivAttachments"
+            app:layout_constraintStart_toEndOf="@id/ivType"
             app:layout_constraintTop_toBottomOf="@id/tvType" />
 
         <ProgressBar