Added tab layout

1 files changed, 107 insertions, 2 deletions

diff --git a/app/src/main/java/com/beam_messenger/beam_messenger/MainActivity.kt b/app/src/main/java/com/beam_messenger/beam_messenger/MainActivity.kt
index d708a98..1686589 100644
--- a/app/src/main/java/com/beam_messenger/beam_messenger/MainActivity.kt
+++ b/app/src/main/java/com/beam_messenger/beam_messenger/MainActivity.kt
@@ -1,22 +1,127 @@
 package com.beam_messenger.beam_messenger
 
+import android.app.ActivityOptions
+import android.content.Intent
 import android.os.Bundle
 import android.support.design.widget.Snackbar
+import android.support.design.widget.TabLayout
+import android.support.v4.app.Fragment
+import android.support.v4.app.FragmentManager
+import android.support.v4.app.FragmentPagerAdapter
 import android.support.v7.app.AppCompatActivity
-
+import android.transition.Fade
+import android.view.*
 import kotlinx.android.synthetic.main.activity_main.*
+import kotlinx.android.synthetic.main.fragment_main.view.*
 
 class MainActivity : AppCompatActivity() {
 
+    /**
+     * The [android.support.v4.view.PagerAdapter] that will provide
+     * fragments for each of the sections. We use a
+     * {@link FragmentPagerAdapter} derivative, which will keep every
+     * loaded fragment in memory. If this becomes too memory intensive, it
+     * may be best to switch to a
+     * [android.support.v4.app.FragmentStatePagerAdapter].
+     */
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
     override fun onCreate(savedInstanceState: Bundle?) {
+        with(window) {
+            requestFeature(Window.FEATURE_CONTENT_TRANSITIONS)
+            exitTransition = Fade()
+        }
+
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
         setSupportActionBar(toolbar)
+        // Create the adapter that will return a fragment for each of the three
+        // primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(supportFragmentManager)
+
+        // Set up the ViewPager with the sections adapter.
+        container.adapter = mSectionsPagerAdapter
+
+        container.addOnPageChangeListener(TabLayout.TabLayoutOnPageChangeListener(tabs))
+        tabs.addOnTabSelectedListener(TabLayout.ViewPagerOnTabSelectedListener(container))
 
         fab.setOnClickListener { view ->
-            Snackbar.make(view, "Sorry, this feature is currently unavailable.", Snackbar.LENGTH_LONG)
+            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                     .setAction("Action", null).show()
         }
     }
 
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        menuInflater.inflate(R.menu.menu_main, menu)
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        // Handle action bar item clicks here. The action bar will
+        // automatically handle clicks on the Home/Up button, so long
+        // as you specify a parent activity in AndroidManifest.xml.
+        val id = item.itemId
+
+        if (id == R.id.action_settings) {
+            val intent = Intent(this@MainActivity, LoginActivity::class.java)
+            startActivity(intent, ActivityOptions.makeSceneTransitionAnimation(this).toBundle())
+        }
+
+        return super.onOptionsItemSelected(item)
+    }
+
+
+    /**
+     * A [FragmentPagerAdapter] that returns a fragment corresponding to
+     * one of the sections/tabs/pages.
+     */
+    inner class SectionsPagerAdapter(fm: FragmentManager) : FragmentPagerAdapter(fm) {
+
+        override fun getItem(position: Int): Fragment {
+            // getItem is called to instantiate the fragment for the given page.
+            // Return a PlaceholderFragment (defined as a static inner class below).
+            return PlaceholderFragment.newInstance(position + 1)
+        }
+
+        override fun getCount(): Int {
+            // Show 3 total pages.
+            return 3
+        }
+    }
+
+    /**
+     * A placeholder fragment containing a simple view.
+     */
+    class PlaceholderFragment : Fragment() {
+
+        override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
+                                  savedInstanceState: Bundle?): View? {
+            val rootView = inflater.inflate(R.layout.fragment_main, container, false)
+            rootView.section_label.text = getString(R.string.section_format, arguments?.getInt(ARG_SECTION_NUMBER))
+            return rootView
+        }
+
+        companion object {
+            /**
+             * The fragment argument representing the section number for this
+             * fragment.
+             */
+            private val ARG_SECTION_NUMBER = "section_number"
+
+            /**
+             * Returns a new instance of this fragment for the given section
+             * number.
+             */
+            fun newInstance(sectionNumber: Int): PlaceholderFragment {
+                val fragment = PlaceholderFragment()
+                val args = Bundle()
+                args.putInt(ARG_SECTION_NUMBER, sectionNumber)
+                fragment.arguments = args
+                return fragment
+            }
+        }
+    }
 }