Updated

app/build.gradle

@@ -7,8 +7,8 @@ android {
         applicationId "com.shahriar.xensight.simplebrowser"
         minSdkVersion 21
         targetSdkVersion 29
-        versionCode 1
-        versionName "1.0"
+        versionCode 6
+        versionName "1.6"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
@@ -22,6 +22,7 @@ android {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation 'androidx.appcompat:appcompat:1.0.2'
+    implementation 'net.yslibrary.keyboardvisibilityevent:keyboardvisibilityevent:3.0.0-RC2'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     testImplementation 'junit:junit:4.12'

app/src/main/AndroidManifest.xml

@@ -11,14 +11,25 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".Activity1">
+        <!--<activity android:name=".Tabs">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+        </activity>-->
+        <!--
+        <activity android:name=".Activity1">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+               &lt;!&ndash; <category android:name="android.intent.category.LAUNCHER" />&ndash;&gt;
+            </intent-filter>
         </activity>
-        <activity android:name=".MainActivity">
+        -->
+        <activity
+            android:name=".MainActivity"
+            android:configChanges="orientation">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/com/shahriar/xensight/simplebrowser/Activity1.java

@@ -1,30 +1,28 @@
 package com.shahriar.xensight.simplebrowser;
 
 import androidx.appcompat.app.AppCompatActivity;
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentManager;
-import androidx.fragment.app.FragmentPagerAdapter;
+import androidx.constraintlayout.widget.ConstraintLayout;
+import androidx.constraintlayout.widget.ConstraintSet;
 import androidx.viewpager.widget.ViewPager;
 
-import android.net.Uri;
+import android.graphics.Color;
 import android.os.Bundle;
-import android.view.LayoutInflater;
 import android.view.View;
-import android.view.ViewGroup;
-import android.webkit.WebView;
-import android.widget.AdapterView;
-import android.widget.EditText;
+import android.widget.Toolbar;
 
 import com.google.android.material.tabs.TabItem;
 import com.google.android.material.tabs.TabLayout;
 
+
 public class Activity1 extends AppCompatActivity {
 
     private TabLayout tabLayout;
     private TabItem tab1, tab2, tab3;
     private ViewPager viewPager;
     public PagerAdapter pagerAdapter;
 
+   /* private ConstraintLayout mConstraintLayout;
+    private ConstraintSet mConstraintSet = new ConstraintSet();*/
 
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -39,14 +37,14 @@ protected void onCreate(Bundle savedInstanceState) {
 
         pagerAdapter = new PagerAdapter(getSupportFragmentManager(), tabLayout.getTabCount());
         viewPager.setAdapter(pagerAdapter);
-        viewPager.setOffscreenPageLimit(10);
+        viewPager.setOffscreenPageLimit(100);
         tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
             @Override
             public void onTabSelected(TabLayout.Tab tab) {
                 viewPager.setCurrentItem(tab.getPosition());
-                if (tab.getPosition() == 0 || tab.getPosition() == 1 || tab.getPosition() == 2) {
+
                     pagerAdapter.notifyDataSetChanged();
-                }
+
             }
 
             @Override
@@ -60,14 +58,34 @@ public void onTabReselected(TabLayout.Tab tab) {
             }
         });
 
+       /* mConstraintLayout = findViewById(R.id.constraintLayout);
+        mConstraintSet.clone(mConstraintLayout);
+        mConstraintSet.connect(R.id.viewpager,ConstraintSet.TOP,R.id.tablayout,ConstraintSet.TOP,100);*/
+    }
 
-
-    }  @Override
+    @Override
     public void onBackPressed() {
-        if (viewPager.getCurrentItem() == 0){finish();}
-        else {
-        viewPager.setCurrentItem(0, true);
-    }}
+        if (viewPager.getCurrentItem() == 0) {
+            finish();
+        } else {
+            viewPager.setCurrentItem(0, true);
+        }
+    }
+
+    /*public void hidetablayout() {
+        tabLayout.animate().translationY(-tabLayout.getHeight());
+       *//* params.setMargins(0, 30, 0, 0);
+        viewPager.setLayoutParams(params);*//*
+        //tabLayout.animate().alpha(0.0f).setDuration(200);
+    }
+
+    public void showtablayout() {
+        tabLayout.animate().translationY(0);
+       *//* params.setMargins(0, 100, 0, 0);
+        viewPager.setLayoutParams(params);*//*
+        //tabLayout.animate().alpha(1f).setDuration(200);
+    }*/
+
 
 }
 

app/src/main/java/com/shahriar/xensight/simplebrowser/FirstFragment.java

@@ -0,0 +1,64 @@
+package com.shahriar.xensight.simplebrowser;
+
+import android.os.Bundle;
+
+import androidx.fragment.app.Fragment;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+
+/**
+ * A simple {@link Fragment} subclass.
+ * Use the {@link FirstFragment#newInstance} factory method to
+ * create an instance of this fragment.
+ */
+public class FirstFragment extends Fragment {
+    // TODO: Rename parameter arguments, choose names that match
+    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
+    private static final String ARG_PARAM1 = "param1";
+    private static final String ARG_PARAM2 = "param2";
+
+    // TODO: Rename and change types of parameters
+    private String mParam1;
+    private String mParam2;
+
+    public FirstFragment() {
+        // Required empty public constructor
+    }
+
+    /**
+     * Use this factory method to create a new instance of
+     * this fragment using the provided parameters.
+     *
+     * @param param1 Parameter 1.
+     * @param param2 Parameter 2.
+     * @return A new instance of fragment FirstFragment.
+     */
+    // TODO: Rename and change types and number of parameters
+    public static FirstFragment newInstance(String param1, String param2) {
+        FirstFragment fragment = new FirstFragment();
+        Bundle args = new Bundle();
+        args.putString(ARG_PARAM1, param1);
+        args.putString(ARG_PARAM2, param2);
+        fragment.setArguments(args);
+        return fragment;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (getArguments() != null) {
+            mParam1 = getArguments().getString(ARG_PARAM1);
+            mParam2 = getArguments().getString(ARG_PARAM2);
+        }
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_first, container, false);
+    }
+}