Add action buttons bar to the main screen

OsmAnd-telegram/res/layout/activity_main.xml

@@ -27,6 +27,35 @@
 
 	</FrameLayout>
 
+	<LinearLayout
+		android:id="@+id/buttons_bar"
+		android:layout_width="match_parent"
+		android:layout_height="@dimen/buttons_bottom_bar_height"
+		android:background="?attr/card_bg_color"
+		android:gravity="center_vertical"
+		android:paddingLeft="@dimen/content_padding_half"
+		android:paddingRight="@dimen/content_padding_half"
+		android:visibility="gone"
+		tools:visibility="visible">
+
+		<include
+			layout="@layout/secondary_btn"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_weight="1"/>
+
+		<View
+			android:layout_width="@dimen/content_padding_half"
+			android:layout_height="match_parent"/>
+
+		<include
+			layout="@layout/primary_btn"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_weight="1"/>
+
+	</LinearLayout>
+
 	<android.support.design.widget.BottomNavigationView
 		android:id="@+id/bottom_navigation"
 		android:layout_width="match_parent"

OsmAnd-telegram/res/values/dimens.xml

@@ -36,6 +36,8 @@
 
 	<dimen name="search_box_height">48dp</dimen>
 
+	<dimen name="buttons_bottom_bar_height">56dp</dimen>
+
 	<dimen name="text_button_letter_spacing" format="float">0.01</dimen>
 
 	<!-- Text sizes -->

OsmAnd-telegram/src/net/osmand/telegram/ui/MainActivity.kt

@@ -17,6 +17,8 @@ import android.support.v7.widget.AppCompatTextView
 import android.support.v7.widget.RecyclerView
 import android.support.v7.widget.SwitchCompat
 import android.view.*
+import android.widget.LinearLayout
+import android.widget.TextView
 import android.widget.Toast
 import net.osmand.PlatformUtil
 import net.osmand.telegram.R
@@ -24,6 +26,7 @@ import net.osmand.telegram.TelegramApplication
 import net.osmand.telegram.helpers.TelegramHelper
 import net.osmand.telegram.helpers.TelegramHelper.*
 import net.osmand.telegram.ui.LoginDialogFragment.LoginDialogType
+import net.osmand.telegram.ui.MyLocationTabFragment.ActionButtonsListener
 import net.osmand.telegram.ui.views.LockableViewPager
 import net.osmand.telegram.utils.AndroidUtils
 import org.drinkless.td.libcore.telegram.TdApi
@@ -38,7 +41,7 @@ private const val PROGRESS_MENU_ID = 2
 private const val MY_LOCATION_TAB_POS = 0
 private const val LIVE_NOW_TAB_POS = 1
 
-class MainActivity : AppCompatActivity(), TelegramListener {
+class MainActivity : AppCompatActivity(), TelegramListener, ActionButtonsListener {
 
 	private val log = PlatformUtil.getLog(TelegramHelper::class.java)
 
@@ -54,6 +57,11 @@ class MainActivity : AppCompatActivity(), TelegramListener {
 
 	private val listeners: MutableList<WeakReference<TelegramListener>> = mutableListOf()
 
+	private var myLocationTabFragment: MyLocationTabFragment? = null
+
+	private lateinit var buttonsBar: LinearLayout
+	private lateinit var bottomNav: BottomNavigationView
+
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
 		setContentView(R.layout.activity_main)
@@ -66,7 +74,8 @@ class MainActivity : AppCompatActivity(), TelegramListener {
 			adapter = ViewPagerAdapter(supportFragmentManager)
 		}
 
-		findViewById<BottomNavigationView>(R.id.bottom_navigation).setOnNavigationItemSelectedListener {
+		bottomNav = findViewById<BottomNavigationView>(R.id.bottom_navigation).apply {
+			setOnNavigationItemSelectedListener {
 				var pos = -1
 				when (it.itemId) {
 					R.id.action_my_location -> pos = MY_LOCATION_TAB_POS
@@ -78,6 +87,22 @@ class MainActivity : AppCompatActivity(), TelegramListener {
 				}
 				false
 			}
+		}
+
+		buttonsBar = findViewById<LinearLayout>(R.id.buttons_bar).apply {
+			findViewById<TextView>(R.id.primary_btn).apply {
+				text = getString(R.string.shared_string_continue)
+				setOnClickListener {
+					myLocationTabFragment?.onPrimaryBtnClick()
+				}
+			}
+			findViewById<TextView>(R.id.secondary_btn).apply {
+				text = getString(R.string.shared_string_cancel)
+				setOnClickListener {
+					myLocationTabFragment?.onSecondaryBtnClick()
+				}
+			}
+		}
 
 		if (!LoginDialogFragment.welcomeDialogShown) {
 			LoginDialogFragment.showWelcomeDialog(supportFragmentManager)
@@ -110,6 +135,9 @@ class MainActivity : AppCompatActivity(), TelegramListener {
 		if (fragment is TelegramListener) {
 			listeners.add(WeakReference(fragment))
 		}
+		if (fragment is MyLocationTabFragment) {
+			myLocationTabFragment = fragment
+		}
 	}
 
 	override fun onResume() {
@@ -207,6 +235,14 @@ class MainActivity : AppCompatActivity(), TelegramListener {
 		}
 	}
 
+	override fun switchButtonsVisibility(visible: Boolean) {
+		val buttonsVisibility = if (visible) View.VISIBLE else View.GONE
+		if (buttonsBar.visibility != buttonsVisibility) {
+			buttonsBar.visibility = buttonsVisibility
+			bottomNav.visibility = if (visible) View.GONE else View.VISIBLE
+		}
+	}
+
 	private fun removeNonexistingChatsFromSettings() {
 		val presentChatTitles = telegramHelper.getChatTitles()
 		settings.removeNonexistingChats(presentChatTitles)

OsmAnd-telegram/src/net/osmand/telegram/ui/MyLocationTabFragment.kt

@@ -49,11 +49,18 @@ class MyLocationTabFragment : Fragment(), TelegramListener {
 
 	private val selectedChats = HashSet<Long>()
 
+	private var actionButtonsListener: ActionButtonsListener? = null
+
 	override fun onCreateView(
 		inflater: LayoutInflater,
 		container: ViewGroup?,
 		savedInstanceState: Bundle?
 	): View? {
+		val activity = activity
+		if (activity is ActionButtonsListener) {
+			actionButtonsListener = activity
+		}
+
 		textMarginSmall = resources.getDimensionPixelSize(R.dimen.content_padding_standard)
 		textMarginBig = resources.getDimensionPixelSize(R.dimen.my_location_text_sides_margin)
 		searchBoxHeight = resources.getDimensionPixelSize(R.dimen.search_box_height)
@@ -61,6 +68,9 @@ class MyLocationTabFragment : Fragment(), TelegramListener {
 
 		savedInstanceState?.apply {
 			selectedChats.addAll(getLongArray(SELECTED_CHATS_KEY).toSet())
+			if (selectedChats.isNotEmpty()) {
+				actionButtonsListener?.switchButtonsVisibility(true)
+			}
 		}
 
 		val mainView = inflater.inflate(R.layout.fragment_my_location_tab, container, false)
@@ -164,6 +174,16 @@ class MyLocationTabFragment : Fragment(), TelegramListener {
 	override fun onSendLiveLocationError(code: Int, message: String) {
 	}
 
+	fun onPrimaryBtnClick() {
+		Toast.makeText(context, "Continue", Toast.LENGTH_SHORT).show()
+	}
+
+	fun onSecondaryBtnClick() {
+		selectedChats.clear()
+		adapter.notifyDataSetChanged()
+		actionButtonsListener?.switchButtonsVisibility(false)
+	}
+
 	private fun adjustText() {
 		val gravity = if (appBarCollapsed) Gravity.START else Gravity.CENTER
 		val padding = if (appBarCollapsed) textMarginSmall else textMarginBig
@@ -270,6 +290,7 @@ class MyLocationTabFragment : Fragment(), TelegramListener {
 					} else {
 						selectedChats.remove(chat.id)
 					}
+					actionButtonsListener?.switchButtonsVisibility(selectedChats.isNotEmpty())
 				}
 			}
 			holder.bottomShadow?.visibility = if (lastItem) View.VISIBLE else View.GONE
@@ -290,4 +311,8 @@ class MyLocationTabFragment : Fragment(), TelegramListener {
 			val bottomShadow: View? = view.findViewById(R.id.bottom_shadow)
 		}
 	}
+
+	interface ActionButtonsListener {
+		fun switchButtonsVisibility(visible: Boolean)
+	}
 }