fix crashes in landscape mode

app/src/main/java/net/i2p/android/i2ptunnel/TunnelsContainer.java

@@ -128,51 +128,14 @@ public class TunnelsContainer extends Fragment implements
     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
-        // Add null check for safety
-        if (mPageIndicator == null) {
-            return;
-        }
         
+        // Initialize ViewPager and adapter
         mFragPagerAdapter = new TunnelsPagerAdapter(getChildFragmentManager());
         mViewPager.setAdapter(mFragPagerAdapter);
 
-        // Replace old indicator setup with MagicIndicator initialization
+        setupMagicIndicator();
-        CommonNavigator commonNavigator = new CommonNavigator(getContext());
-        commonNavigator.setAdapter(new CommonNavigatorAdapter() {
-            @Override
-            public int getCount() {
-                return mFragPagerAdapter.getCount();
-            }
-
-            @Override
-            public IPagerTitleView getTitleView(Context context, final int index) {
-                SimplePagerTitleView simplePagerTitleView = new ColorTransitionPagerTitleView(context);
-                simplePagerTitleView.setText(mFragPagerAdapter.getPageTitle(index));
-                simplePagerTitleView.setNormalColor(ContextCompat.getColor(context, 
-                    R.color.primary_text_disabled_material_dark));
-                simplePagerTitleView.setSelectedColor(ContextCompat.getColor(context,
-                    R.color.primary_text_default_material_dark));
-                simplePagerTitleView.setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        mViewPager.setCurrentItem(index);
-                    }
-                });
-                return simplePagerTitleView;
-            }
-
-            @Override
-            public IPagerIndicator getIndicator(Context context) {
-                LinePagerIndicator indicator = new LinePagerIndicator(context);
-                indicator.setColors(ContextCompat.getColor(context, R.color.primary));
-                return indicator;
-            }
-        });
-
-        mPageIndicator.setNavigator(commonNavigator);
-        ViewPagerHelper.bind(mPageIndicator, mViewPager);
-        //mPageIndicator.setViewPager(mViewPager);
 
+        // Setup New Tunnel button
         mNewTunnel.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
@@ -378,6 +341,7 @@ public class TunnelsContainer extends Fragment implements
         }
     
         CommonNavigator commonNavigator = new CommonNavigator(getContext());
+        commonNavigator.setAdjustMode(true);  // Add this line for better spacing
         commonNavigator.setAdapter(new CommonNavigatorAdapter() {
             @Override
             public int getCount() {
@@ -388,6 +352,7 @@ public class TunnelsContainer extends Fragment implements
             public IPagerTitleView getTitleView(Context context, final int index) {
                 SimplePagerTitleView simplePagerTitleView = new ColorTransitionPagerTitleView(context);
                 simplePagerTitleView.setText(mFragPagerAdapter.getPageTitle(index));
+                simplePagerTitleView.setTextSize(16); // Add this line to increase text size
                 simplePagerTitleView.setNormalColor(ContextCompat.getColor(context, 
                     R.color.primary_text_disabled_material_dark));
                 simplePagerTitleView.setSelectedColor(ContextCompat.getColor(context,
@@ -404,7 +369,9 @@ public class TunnelsContainer extends Fragment implements
             @Override
             public IPagerIndicator getIndicator(Context context) {
                 LinePagerIndicator indicator = new LinePagerIndicator(context);
+                indicator.setMode(LinePagerIndicator.MODE_WRAP_CONTENT);
                 indicator.setColors(ContextCompat.getColor(context, R.color.primary));
+                indicator.setLineHeight(dpToPx(context, 3));
                 return indicator;
             }
         });
@@ -412,4 +379,9 @@ public class TunnelsContainer extends Fragment implements
         mPageIndicator.setNavigator(commonNavigator);
         ViewPagerHelper.bind(mPageIndicator, mViewPager);
     }
+    
+    private int dpToPx(Context context, int dp) {
+        float density = context.getResources().getDisplayMetrics().density;
+        return Math.round(dp * density);
+    }
 }

app/src/main/res/layout-land/activity_viewpager.xml

@@ -5,7 +5,7 @@
     android:layout_height="match_parent"
     android:orientation="vertical">
 
-    <android.support.v7.widget.Toolbar
+    <androidx.appcompat.widget.Toolbar
         android:id="@+id/main_toolbar"
         android:layout_width="match_parent"
         android:layout_height="?attr/actionBarSize"
@@ -18,7 +18,7 @@
             android:id="@+id/sliding_tabs"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content" />
-    </android.support.v7.widget.Toolbar>
+    </androidx.appcompat.widget.Toolbar>
 
     <net.i2p.android.widget.DrawShadowFrameLayout
         android:layout_width="match_parent"
@@ -27,7 +27,7 @@
         android:clipChildren="false"
         app:shadowDrawable="@drawable/header_shadow">
 
-        <android.support.v4.view.CustomViewPager
+        <androidx.viewpager.widget.CustomViewPager
             android:id="@+id/pager"
             android:layout_width="match_parent"
             android:layout_height="match_parent" />

app/src/main/res/layout-land/fragment_main.xml

@@ -72,7 +72,7 @@
             </LinearLayout>
         </LinearLayout>
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/console_bottom_toolbar"
             android:layout_width="match_parent"
             android:layout_height="56dp"
@@ -130,7 +130,7 @@
                         tools:text="0.0 KBps / 0.0 KB" />
                 </LinearLayout>
             </LinearLayout>
-        </android.support.v7.widget.Toolbar>
+        </androidx.appcompat.widget.Toolbar>
     </RelativeLayout>
 
     <ScrollView