Add useful methods to handle the social accounts interface.

app/src/main/java/chat/rocket/android/app/AuthenticationLoginFragment.kt

@@ -8,6 +8,8 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.WindowManager
+import android.widget.ScrollView
 import chat.rocket.android.R
 import kotlinx.android.synthetic.main.fragment_authentication_log_in.*
 
@@ -21,20 +23,41 @@ class AuthenticationLoginFragment : Fragment() {
     override fun onViewCreated(view: View?, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
+        activity.window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN)
+
         if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.M) {
             tintEditTextDrawableStart()
         }
+
+        // Just an example: if the server allow the login via social accounts (oauth authentication) then show the respective interface.
+        shouldShowOauthView(true)
+        // In this case we need to setup the text_username_or_email and text_password EditText to hide and show the oauth interface when the user touch the respective fields.
         setupEditTextListener()
+
+        // Show the first three social account's ImageButton (REMARK: we must show at maximum *three* views)
+        showLoginUsingFacebookImagebutton()
+        showLoginUsingGithubImagebutton()
+        showLoginUsingGoogleImagebutton()
+
+        // Setup the FloatingActionButton to show more social account's ImageButton (it expands the social accounts interface to show more views).
+        setupFabListener()
+
+        // Just an example: if the server allow the new users registration then show the respective interface.
+        shouldShowSignUpMsgView(true)
     }
 
     override fun onConfigurationChanged(newConfig: Configuration?) {
         super.onConfigurationChanged(newConfig)
 
         if (KeyboardHelper.isHardKeyboardShown(newConfig)) {
-            shouldShowSocialAccountsAndSignUpMsgViews(false)
+            shouldShowOauthView(false)
+            shouldShowSignUpMsgView(false)
+            shouldShowLoginButton(true)
         } else {
             if (isEditTextNullOrBlank()) {
-                shouldShowSocialAccountsAndSignUpMsgViews(true)
+                shouldShowOauthView(true)
+                shouldShowSignUpMsgView(true)
+                shouldShowLoginButton(false)
             }
         }
     }
@@ -54,41 +77,110 @@ class AuthenticationLoginFragment : Fragment() {
     private fun setupEditTextListener() {
         text_username_or_email.viewTreeObserver.addOnGlobalLayoutListener({
             if (KeyboardHelper.isSoftKeyboardShown(text_username_or_email.rootView)) {
-                shouldShowSocialAccountsAndSignUpMsgViews(false)
+                shouldShowOauthView(false)
+                shouldShowSignUpMsgView(false)
+                shouldShowLoginButton(true)
             } else {
                 if (isEditTextNullOrBlank()) {
-                    shouldShowSocialAccountsAndSignUpMsgViews(true)
+                    shouldShowOauthView(true)
+                    shouldShowSignUpMsgView(true)
+                    shouldShowLoginButton(false)
                 }
             }
         })
 
         text_password.viewTreeObserver.addOnGlobalLayoutListener({
-            if (KeyboardHelper.isSoftKeyboardShown(text_username_or_email.rootView)) {
-                shouldShowSocialAccountsAndSignUpMsgViews(false)
+            if (KeyboardHelper.isSoftKeyboardShown(text_password.rootView)) {
+                shouldShowOauthView(false)
+                shouldShowSignUpMsgView(false)
+                shouldShowLoginButton(true)
             } else {
                 if (isEditTextNullOrBlank()) {
-                    shouldShowSocialAccountsAndSignUpMsgViews(true)
+                    shouldShowOauthView(true)
+                    shouldShowSignUpMsgView(true)
+                    shouldShowLoginButton(false)
                 }
             }
         })
     }
 
-    private fun shouldShowSocialAccountsAndSignUpMsgViews(show: Boolean) {
+    private fun shouldShowOauthView(show: Boolean) {
         if (show) {
             social_accounts_container.visibility = View.VISIBLE
-            text_new_in_rocket_chat.visibility = View.VISIBLE
             button_fab.visibility = View.VISIBLE
-            button_log_in.visibility = View.GONE
         } else {
             social_accounts_container.visibility = View.GONE
-            text_new_in_rocket_chat.visibility = View.GONE
             button_fab.visibility = View.GONE
+        }
+    }
+
+    private fun shouldShowSignUpMsgView(show: Boolean) {
+        if (show) {
+            text_new_in_rocket_chat.visibility = View.VISIBLE
+        } else {
+            text_new_in_rocket_chat.visibility = View.GONE
+        }
+    }
+
+    private fun shouldShowLoginButton(show: Boolean) {
+        if (show) {
             button_log_in.visibility = View.VISIBLE
+        } else {
+            button_log_in.visibility = View.GONE
         }
     }
 
+    private fun showLoginUsingFacebookImagebutton() {
+        button_facebook.visibility = View.VISIBLE
+    }
+
+    private fun showLoginUsingGithubImagebutton() {
+        button_github.visibility = View.VISIBLE
+    }
+
+    private fun showLoginUsingGoogleImagebutton() {
+        button_google.visibility = View.VISIBLE
+    }
+
+    private fun showLoginUsingLinkedinImagebutton() {
+        button_linkedin.visibility = View.VISIBLE
+    }
+
+    private fun showLoginUsingMeteorImagebutton() {
+        button_meteor.visibility = View.VISIBLE
+    }
+
+    private fun showLoginUsingTwitterImagebutton() {
+        button_twitter.visibility = View.VISIBLE
+    }
+
+    private fun showLoginUsingGitlabImagebutton() {
+        button_gitlab.visibility = View.VISIBLE
+    }
+
+    private fun setupFabListener() {
+        button_fab.setOnClickListener({
+            showLoginUsingLinkedinImagebutton()
+            showLoginUsingMeteorImagebutton()
+            showLoginUsingTwitterImagebutton()
+            showLoginUsingGitlabImagebutton()
+
+            scrollToBottom()
+            hideFab()
+        })
+    }
+
     // Returns true if *all* EditText are null or blank.
     private fun isEditTextNullOrBlank(): Boolean {
         return text_username_or_email.text.isNullOrBlank() && text_password.text.isNullOrBlank()
     }
+
+    private fun scrollToBottom() {
+//        scroll_view.postDelayed({ scroll_view.smoothScrollTo(0, view.top) }, 1000)
+        scroll_view.postDelayed({ scroll_view.fullScroll(ScrollView.FOCUS_DOWN); }, 1000)
+    }
+
+    private fun hideFab() {
+        button_fab.postDelayed({button_fab.hide() }, 1500)
+    }
 }
\ No newline at end of file