From 2d9d12f0bf868896c87a053bf9d73e292c7fce8d Mon Sep 17 00:00:00 2001
From: Hemanth S <hemanths@live.com>
Date: Sat, 17 Oct 2020 13:53:03 +0530
Subject: [PATCH] Fix keyboard not showing when search fragment shows #955

---
 .../retromusic/extensions/ViewExtensions.kt   | 38 +++++++++++++++++++
 .../fragments/search/SearchFragment.kt        | 14 +++----
 2 files changed, 44 insertions(+), 8 deletions(-)

diff --git a/app/src/main/java/code/name/monkey/retromusic/extensions/ViewExtensions.kt b/app/src/main/java/code/name/monkey/retromusic/extensions/ViewExtensions.kt
index 3e90305f..a343b2c3 100644
--- a/app/src/main/java/code/name/monkey/retromusic/extensions/ViewExtensions.kt
+++ b/app/src/main/java/code/name/monkey/retromusic/extensions/ViewExtensions.kt
@@ -15,9 +15,12 @@
 package code.name.monkey.retromusic.extensions
 
 import android.animation.ObjectAnimator
+import android.content.Context
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.ViewTreeObserver
+import android.view.inputmethod.InputMethodManager
 import android.widget.EditText
 import androidx.annotation.LayoutRes
 import androidx.core.animation.doOnEnd
@@ -76,3 +79,38 @@ fun BottomSheetBehavior<*>.peekHeightAnimate(value: Int) {
         }
 }
 
+fun View.focusAndShowKeyboard() {
+    /**
+     * This is to be called when the window already has focus.
+     */
+    fun View.showTheKeyboardNow() {
+        if (isFocused) {
+            post {
+                // We still post the call, just in case we are being notified of the windows focus
+                // but InputMethodManager didn't get properly setup yet.
+                val imm =
+                    context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+                imm.showSoftInput(this, InputMethodManager.SHOW_IMPLICIT)
+            }
+        }
+    }
+
+    requestFocus()
+    if (hasWindowFocus()) {
+        // No need to wait for the window to get focus.
+        showTheKeyboardNow()
+    } else {
+        // We need to wait until the window gets focus.
+        viewTreeObserver.addOnWindowFocusChangeListener(
+            object : ViewTreeObserver.OnWindowFocusChangeListener {
+                override fun onWindowFocusChanged(hasFocus: Boolean) {
+                    // This notification will arrive just before the InputMethodManager gets set up.
+                    if (hasFocus) {
+                        this@focusAndShowKeyboard.showTheKeyboardNow()
+                        // It’s very important to remove this listener once we are done.
+                        viewTreeObserver.removeOnWindowFocusChangeListener(this)
+                    }
+                }
+            })
+    }
+} 
\ No newline at end of file
diff --git a/app/src/main/java/code/name/monkey/retromusic/fragments/search/SearchFragment.kt b/app/src/main/java/code/name/monkey/retromusic/fragments/search/SearchFragment.kt
index d767d859..6ab5113a 100644
--- a/app/src/main/java/code/name/monkey/retromusic/fragments/search/SearchFragment.kt
+++ b/app/src/main/java/code/name/monkey/retromusic/fragments/search/SearchFragment.kt
@@ -21,8 +21,6 @@ import android.speech.RecognizerIntent
 import android.text.Editable
 import android.text.TextWatcher
 import android.view.View
-import android.view.inputmethod.InputMethodManager
-import androidx.core.content.ContextCompat.getSystemService
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -32,6 +30,7 @@ import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.adapter.SearchAdapter
 import code.name.monkey.retromusic.extensions.accentColor
 import code.name.monkey.retromusic.extensions.dipToPix
+import code.name.monkey.retromusic.extensions.focusAndShowKeyboard
 import code.name.monkey.retromusic.extensions.showToast
 import code.name.monkey.retromusic.fragments.base.AbsMainActivityFragment
 import com.google.android.material.textfield.TextInputEditText
@@ -54,17 +53,16 @@ class SearchFragment : AbsMainActivityFragment(R.layout.fragment_search), TextWa
         mainActivity.setSupportActionBar(toolbar)
         libraryViewModel.clearSearchResult()
         setupRecyclerView()
-        searchView.addTextChangedListener(this)
+        searchView.apply {
+            addTextChangedListener(this@SearchFragment)
+            focusAndShowKeyboard()
+        }
         voiceSearch.setOnClickListener { startMicSearch() }
         clearText.setOnClickListener { searchView.clearText() }
         keyboardPopup.apply {
             accentColor()
             setOnClickListener {
-                val inputManager = getSystemService(
-                    requireContext(),
-                    InputMethodManager::class.java
-                )
-                inputManager?.showSoftInput(searchView, InputMethodManager.SHOW_IMPLICIT)
+                searchView.focusAndShowKeyboard()
             }
         }
         if (savedInstanceState != null) {