< 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=".MainActivity">
< LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="136dp"
tools:layout_editor_absoluteY="0dp"
android:orientation="vertical"
tools:ignore="MissingConstraints">
< WebView
android:id="@+id/webview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
</ WebView >
< LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_weight="3">
< Button
android:id="@+id/btnLeft"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="左邊" />
< EditText
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="0"/>
< Button
android:id="@+id/btnRight"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="右邊" />
</ LinearLayout >
</ LinearLayout >
</ android.support.constraint.ConstraintLayout >
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