<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://s...content-available-to-author-only...d.com/apk/res/android"
xmlns:app="http://s...content-available-to-author-only...d.com/apk/res-auto"
xmlns:tools="http://s...content-available-to-author-only...d.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.chengforapp.myapplication.MainActivity">
<TextView
android:id="@+id/txtShow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btn_paired"
android:layout_width="101dp"
android:layout_height="69dp"
android:layout_marginBottom="8dp"
android:layout_marginStart="8dp"
android:text="paired"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/btn_conn"
android:layout_width="110dp"
android:layout_height="67dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:text="find "
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<ListView
android:id="@+id/Show_B_List"
android:layout_width="368dp"
android:layout_height="122dp"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toTopOf="@+id/DangerText"
app:layout_constraintTop_toBottomOf="@+id/txtShow"
tools:layout_editor_absoluteX="8dp" />
<TextView
android:id="@+id/DangerText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="parent"
tools:layout_editor_absoluteX="154dp" />
<ImageView
android:id="@+id/pmimage"
android:layout_width="wrap_content"
android:layout_height="245dp"
app:srcCompat="@drawable/a000"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp" />
<TextView
android:id="@+id/DATE"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
tools:layout_editor_absoluteX="26dp"
tools:layout_editor_absoluteY="25dp" />
</android.support.constraint.ConstraintLayout>