Adding option to delete certificates.

app/src/main/java/org/mian/gitnex/activities/MainActivity.java

@@ -1,5 +1,6 @@
 package org.mian.gitnex.activities;
 
+import android.app.Activity;
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
@@ -101,7 +102,7 @@ public class MainActivity extends BaseActivity implements NavigationView.OnNavig
         boolean connToInternet = AppUtil.haveNetworkConnection(getApplicationContext());
 
         if(!tinyDb.getBoolean("loggedInMode")) {
-            logout();
+            logout(this, ctx);
             return;
         }
 
@@ -354,7 +355,7 @@ public class MainActivity extends BaseActivity implements NavigationView.OnNavig
                         new SettingsFragment()).commit();
                 break;
             case R.id.nav_logout:
-                logout();
+                logout(this, ctx);
                 overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
                 break;
             case R.id.nav_about:
@@ -392,15 +393,15 @@ public class MainActivity extends BaseActivity implements NavigationView.OnNavig
         }
     }
 
-    public void logout() {
+    public static void logout(Activity activity, Context ctx) {
 
-        TinyDB tinyDb = new TinyDB(getApplicationContext());
+        TinyDB tinyDb = new TinyDB(ctx.getApplicationContext());
         tinyDb.putBoolean("loggedInMode", false);
         tinyDb.remove("basicAuthPassword");
         tinyDb.putBoolean("basicAuthFlag", false);
         //tinyDb.clear();
-        finish();
+        activity.finish();
-        startActivity(new Intent(MainActivity.this, LoginActivity.class));
+        ctx.startActivity(new Intent(ctx, LoginActivity.class));
 
     }
 

app/src/main/java/org/mian/gitnex/fragments/SettingsFragment.java

@@ -13,7 +13,9 @@ import android.widget.LinearLayout;
 import android.widget.Switch;
 import android.widget.TextView;
 import org.mian.gitnex.R;
+import org.mian.gitnex.activities.MainActivity;
 import org.mian.gitnex.helpers.Toasty;
+import org.mian.gitnex.helpers.ssl.MemorizingTrustManager;
 import org.mian.gitnex.util.TinyDB;
 import java.util.Objects;
 import androidx.annotation.NonNull;
@@ -67,6 +69,7 @@ public class SettingsFragment extends Fragment {
         LinearLayout homeScreenFrame = v.findViewById(R.id.homeScreenFrame);
         LinearLayout customFontFrame = v.findViewById(R.id.customFontFrame);
         LinearLayout themeFrame = v.findViewById(R.id.themeSelectionFrame);
+        LinearLayout certsFrame = v.findViewById(R.id.certsFrame);
 
         Switch issuesSwitch =  v.findViewById(R.id.switchIssuesBadge);
         Switch pdfModeSwitch =  v.findViewById(R.id.switchPdfMode);
@@ -144,6 +147,32 @@ public class SettingsFragment extends Fragment {
             pdfModeSwitch.setChecked(false);
         }
 
+        // certs deletion
+        certsFrame.setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
+                builder.setTitle("Delete trusted certificates?");
+                builder.setMessage("Are you really sure to delete any manually trusted certificate?\n\nNotice: Your will be logged out too.");
+                builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {
+
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        ctx.getSharedPreferences(MemorizingTrustManager.KEYSTORE_NAME, Context.MODE_PRIVATE)
+                                .edit()
+                                .remove(MemorizingTrustManager.KEYSTORE_KEY)
+                                .apply();
+
+                        MainActivity.logout(Objects.requireNonNull(getActivity()), ctx);
+                    }
+                });
+
+                builder.setNeutralButton("NO", (dialog, which) -> dialog.dismiss());
+                builder.create().show();
+            }
+        });
+
         // issues badge switcher
         issuesSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

app/src/main/java/org/mian/gitnex/helpers/ssl/MemorizingTrustManager.java

@@ -45,8 +45,8 @@ import javax.net.ssl.X509TrustManager;
 public class MemorizingTrustManager implements X509TrustManager {
 	private final static int NOTIFICATION_ID = 100509;
 
-	private final static String KEYSTORE_NAME = "keystore";
+	public final static String KEYSTORE_NAME = "keystore";
-	private final static String KEYSTORE_KEY = "keystore";
+	public final static String KEYSTORE_KEY = "keystore";
 
 	private Context context;
 	private NotificationManager notificationManager;

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

@@ -33,7 +33,7 @@
                 layout="@layout/layout_settings_fileview"/>
 
             <View
-                android:id="@+id/translationDivider"
+                android:id="@+id/certsDivider"
                 android:layout_width="match_parent"
                 android:layout_height="1dp"
                 android:layout_marginStart="44dp"
@@ -42,6 +42,20 @@
                 android:layout_marginBottom="20dp"
                 android:layout_below="@id/fileViewLayout" />
 
+            <include
+                android:id="@+id/certsLayout"
+                layout="@layout/layout_settings_certs" />
+
+            <View
+                android:id="@+id/translationDivider"
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:layout_marginStart="44dp"
+                android:layout_marginEnd="5dp"
+                android:layout_marginTop="20dp"
+                android:layout_marginBottom="20dp"
+                android:layout_below="@id/certsLayout" />
+
             <include
                 android:id="@+id/langLayout"
                 layout="@layout/layout_settings_languages" />

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

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:id="@+id/layoutSettingsCerts"
+    android:orientation="vertical"
+    android:layout_below="@+id/certsDivider"
+    android:background="?attr/primaryBackgroundColor">
+
+    <TextView
+        android:id="@+id/tvCert"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:drawableStart="@drawable/ic_lock_open"
+        android:drawablePadding="20dp"
+        android:text="@string/settingsCertsHeader"
+        android:textColor="@color/colorDarkGreen"
+        android:textSize="14sp"
+        android:textStyle="bold" />
+
+    <LinearLayout
+        android:id="@+id/certsFrame"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="20dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:id="@+id/tvCertHeader"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="16sp"
+            android:layout_marginTop="10dp"
+            android:layout_marginStart="44dp"
+            android:layout_marginEnd="4dp"
+            android:text="@string/settingsCertsSelectorHeader"
+            android:textColor="?attr/primaryTextColor"/>
+
+    </LinearLayout>
+
+</LinearLayout>

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

@@ -246,6 +246,8 @@
 
     <!-- settings -->
     <string name="settingsLanguageHeaderText">Translation</string>
+    <string name="settingsCertsHeader">Certs</string>
+    <string name="settingsCertsSelectorHeader">Delete certificates</string>
     <string name="settingsDateTimeHeaderText">Date &amp; Time</string>
     <string name="settingsSave">Settings saved</string>
     <string name="settingsLanguageSelectorHeader">Language</string>