Added button to go to Android app settings

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

@@ -28,7 +28,9 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.graphics.Paint;
+import android.net.Uri;
 import android.os.Bundle;
+import android.provider.Settings;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -82,6 +84,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
     private SwitchCompat swCleanupAttachments;
     private Button btnCleanup;
     private TextView tvLastCleanup;
+    private Button btnApp;
     private Button btnMore;
 
     private TextView tvProcessors;
@@ -137,6 +140,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
         swCleanupAttachments = view.findViewById(R.id.swCleanupAttachments);
         btnCleanup = view.findViewById(R.id.btnCleanup);
         tvLastCleanup = view.findViewById(R.id.tvLastCleanup);
+        btnApp = view.findViewById(R.id.btnApp);
         btnMore = view.findViewById(R.id.btnMore);
 
         tvProcessors = view.findViewById(R.id.tvProcessors);
@@ -308,6 +312,20 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
             }
         });
 
+        final Intent app = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
+        app.setData(Uri.parse("package:" + getContext().getPackageName()));
+        btnApp.setEnabled(app.resolveActivity(getContext().getPackageManager()) != null);
+        btnApp.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                try {
+                    getContext().startActivity(app);
+                } catch (Throwable ex) {
+                    ToastEx.makeText(getContext(), getString(R.string.title_no_viewer, app.getAction()), Toast.LENGTH_LONG).show();
+                }
+            }
+        });
+
         btnMore.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {

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

@@ -331,6 +331,16 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/tvCleanupHint" />
 
+        <Button
+            android:id="@+id/btnApp"
+            style="?android:attr/buttonStyleSmall"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:text="@string/title_advanced_app"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvLastCleanup" />
+
         <Button
             android:id="@+id/btnMore"
             style="?android:attr/buttonStyleSmall"
@@ -339,7 +349,7 @@
             android:layout_marginTop="12dp"
             android:text="@string/title_advanced_more"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/tvLastCleanup" />
+            app:layout_constraintTop_toBottomOf="@id/btnApp" />
 
         <eu.faircode.email.FixedTextView
             android:id="@+id/tvProcessors"

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

@@ -461,6 +461,7 @@
     <string name="title_advanced_cleanup_attachments">Delete attachments of old messages</string>
     <string name="title_advanced_cleanup">Cleanup</string>
     <string name="title_advanced_last_cleanup">Last cleanup: %1$s</string>
+    <string name="title_advanced_app">App settings</string>
     <string name="title_advanced_more">More options</string>
     <string name="title_advanced_processors" translatable="false">Processors: %1$d</string>
     <string name="title_advanced_memory_class" translatable="false">Memory class: %1$s</string>