最佳答案
New Layout editor in Android Studio 2.2 keeps showing this error on views like EditText and Buttons. kindly help.Also, any links that help in onboarding with the new constraint layout would be appreciated.
code:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
android:id="@+id/activity_main"
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.set.email.MainActivity"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="81dp">
<TextView
android:text="To:"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
tools:layout_editor_absoluteX="7dp"
tools:layout_editor_absoluteY="4dp"
android:id="@+id/textTo"/>
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:ems="10"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="24dp"
android:id="@+id/editTo"
android:textAppearance="@android:style/TextAppearance.DeviceDefault.Medium"/>
<EditText
android:layout_width="384dp"
android:layout_height="42dp"
android:inputType="textPersonName"
android:ems="10"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="94dp"
android:id="@+id/editSubject"
android:textAppearance="@android:style/TextAppearance.DeviceDefault.Medium"/>
<EditText
android:layout_width="384dp"
android:layout_height="273dp"
android:inputType="textPersonName"
android:ems="10"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="179dp"
android:id="@+id/editMessage"
app:layout_constraintLeft_toLeftOf="@+id/activity_main"
tools:layout_constraintLeft_creator="50"
android:textAppearance="@android:style/TextAppearance.DeviceDefault.Medium"/>
<Button
android:text="Send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
tools:layout_editor_absoluteX="140dp"
tools:layout_editor_absoluteY="454dp"
android:id="@+id/btnSend"
app:layout_constraintLeft_toLeftOf="@+id/editMessage"
tools:layout_constraintLeft_creator="0"
app:layout_constraintRight_toRightOf="@+id/activity_main"
android:layout_marginEnd="16dp"
tools:layout_constraintRight_creator="0"
android:textAppearance="@android:style/TextAppearance.DeviceDefault.Medium"/>
</android.support.constraint.ConstraintLayout>