Design improvements for registration flow.

app/src/main/java/org/thoughtcrime/securesms/registration/RegistrationNavigationActivity.java

@@ -42,12 +42,6 @@ public final class RegistrationNavigationActivity extends AppCompatActivity {
     return intent;
   }
 
-  @Override
-  protected void attachBaseContext(@NonNull Context newBase) {
-    getDelegate().setLocalNightMode(AppCompatDelegate.MODE_NIGHT_NO);
-    super.attachBaseContext(newBase);
-  }
-
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);

app/src/main/java/org/thoughtcrime/securesms/registration/fragments/EnterPhoneNumberFragment.java

@@ -9,6 +9,8 @@ import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.EditText;
 import android.widget.ScrollView;
 import android.widget.Spinner;
 import android.widget.Toast;
@@ -126,6 +128,14 @@ public final class EnterPhoneNumberFragment extends LoggingFragment implements R
     if (supportActionBar != null) {
       supportActionBar.setTitle(null);
     }
+    controller.prepopulateCountryCode();
+    showKeyboard(number.getEditText());
+  }
+
+  private void showKeyboard(View viewToFocus) {
+    viewToFocus.requestFocus();
+    InputMethodManager imm = (InputMethodManager) requireContext().getSystemService(Context.INPUT_METHOD_SERVICE);
+    imm.showSoftInput(viewToFocus, InputMethodManager.SHOW_IMPLICIT);
   }
 
   @Override

app/src/main/java/org/thoughtcrime/securesms/registration/util/RegistrationNumberInputController.kt

@@ -43,6 +43,10 @@ class RegistrationNumberInputController(
     spinnerView.addTextChangedListener(CountryCodeEntryListener())
   }
 
+  fun prepopulateCountryCode() {
+    spinnerView.setText(supportedCountryPrefixes[0].toString())
+  }
+
   private fun advanceToPhoneNumberInput() {
     if (!isUpdating) {
       phoneNumberInputLayout.requestFocus()