When a property starts with "tools:" it means it only works on the editor. It's useful when you will modify the position or visibility of a view programatically or you want to use different color backgrounds to play around with images with transparency. But it will not be reflected on your app. You need to use the "Infer constraints" option for the editor to create the real constraints.
Marina On Wed, Aug 2, 2017 at 12:03 AM, Tony Cardinal <nite...@gmail.com> wrote: > hello, > I created a simple app with 2 checkboxes a button and a text field. And I > see all of these widgets on top of each other on the upper left hand corner > of the screen when I run the app. In the design tab of android studio, > these widgets are spaced one on top of the other. What am I doing wrong? > Thank you for your help in advance. Here is the code: > > <?xml version="1.0" encoding="utf-8"?> > <android.support.constraint.ConstraintLayout > xmlns:android="http://schemas.android.com/apk/res/android"; > xmlns:app="http://schemas.android.com/apk/res-auto"; > xmlns:tools="http://schemas.android.com/tools"; > android:layout_width="match_parent" > android:layout_height="match_parent" > tools:context="com.example.me.a01_05_01.MainActivity"> > > <TextView > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:text="Hello World!" > app:layout_constraintBottom_toBottomOf="parent" > app:layout_constraintLeft_toLeftOf="parent" > app:layout_constraintRight_toRightOf="parent" > app:layout_constraintTop_toTopOf="parent" /> > > <CheckBox > android:id="@+id/checkBox" > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:text="CheckBox" > tools:layout_editor_absoluteX="32dp" > tools:layout_editor_absoluteY="47dp" /> > > <CheckBox > android:id="@+id/checkBox2" > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:text="CheckBox" > tools:layout_editor_absoluteX="32dp" > tools:layout_editor_absoluteY="99dp" /> > > <Button > android:id="@+id/button" > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:text="Button" > tools:layout_editor_absoluteX="48dp" > tools:layout_editor_absoluteY="416dp" /> > > <TextView > android:id="@+id/textView" > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:text="TextView" > tools:layout_editor_absoluteX="57dp" > tools:layout_editor_absoluteY="292dp" /> > > </android.support.constraint.ConstraintLayout> > > -- > You received this message because you are subscribed to the Google Groups > "Android Developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to android-developers+unsubscr...@googlegroups.com. > To post to this group, send email to android-developers@googlegroups.com. > Visit this group at https://groups.google.com/group/android-developers. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/android-developers/52044978-8634-4d62-a84c- > b48383d2ed31%40googlegroups.com > <https://groups.google.com/d/msgid/android-developers/52044978-8634-4d62-a84c-b48383d2ed31%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. To post to this group, send email to android-developers@googlegroups.com. Visit this group at https://groups.google.com/group/android-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/android-developers/CACaNmX0y%3D6Zg8ejmfozO5wi8YnUnZGrZW5o7LAkvxctQr3yv3w%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
