Fix copy paste second attempt

Reviewed By: AaaChiuuu

Differential Revision: D5080735

fbshipit-source-id: c76fb204c114b8a8fc884aa208ad5fa9bba01fcb

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputManager.java

@@ -28,6 +28,7 @@ import android.util.TypedValue;
 import android.view.Gravity;
 import android.view.KeyEvent;
 import android.view.View;
+import android.view.ViewTreeObserver;
 import android.view.inputmethod.EditorInfo;
 import android.widget.TextView;
 
@@ -91,13 +92,26 @@ public class ReactTextInputManager extends BaseViewManager<ReactEditText, Layout
 
   @Override
   public ReactEditText createViewInstance(ThemedReactContext context) {
-    ReactEditText editText = new ReactEditText(context);
+    final ReactEditText editText = new ReactEditText(context);
     int inputType = editText.getInputType();
     editText.setInputType(inputType & (~InputType.TYPE_TEXT_FLAG_MULTI_LINE));
     editText.setReturnKeyType("done");
     editText.setTextSize(
         TypedValue.COMPLEX_UNIT_PX,
         (int) Math.ceil(PixelUtil.toPixelFromSP(ViewDefaults.FONT_SIZE_SP)));
+    // Fixes an issue where the EditText is not selectable if nested within a
+    // ViewPagerAndroid on some versions of Android (API 16, 23)
+    editText.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
+      @Override
+      public boolean onPreDraw() {
+        editText.getViewTreeObserver().removeOnPreDrawListener(this);
+        int selectionStart = editText.getSelectionStart();
+        int selectionEnd = editText.getSelectionEnd();
+        editText.setTextIsSelectable(true);
+        editText.setSelection(selectionStart, selectionEnd);
+        return true;
+      }
+    });
     return editText;
   }