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我试图使2个按钮（发送和清除）之间的空间变得均匀。 它正在调整到屏幕中心的边框和垂直指引线。 这个项目似乎很好，但它看起来不像应用程序本身。 请检查下面的截图。ConstraintLayout - 即使按钮之间的空间
<?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.f3nr1r.testkeyboard.MainActivity"
tools:layout_editor_absoluteY="81dp"
tools:layout_editor_absoluteX="0dp">
<Button
android:id="@+id/buttonClear"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:onClick="clearText"
android:text="Clear"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="@+id/editText"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="@+id/guideline2"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toTopOf="@+id/guideline3"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent" />
<Button
android:id="@+id/button0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="0"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="@+id/button8"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent" />
<Button
android:id="@+id/button9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="9"
app:layout_constraintBaseline_toBaselineOf="@+id/button8"
app:layout_constraintLeft_toRightOf="@+id/button8"
android:layout_marginLeft="8dp" />
<Button
android:id="@+id/button7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="7"
app:layout_constraintRight_toLeftOf="@+id/button8"
android:layout_marginRight="8dp"
app:layout_constraintBaseline_toBaselineOf="@+id/button8" />
<Button
android:id="@+id/button6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="6"
app:layout_constraintLeft_toRightOf="@+id/button5"
android:layout_marginLeft="8dp"
app:layout_constraintBaseline_toBaselineOf="@+id/button5" />
<Button
android:id="@+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="5"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="@+id/button2"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp" />
<Button
android:id="@+id/button8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="8"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="@+id/button5"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent" />
<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="4"
app:layout_constraintRight_toLeftOf="@+id/button5"
android:layout_marginRight="8dp"
app:layout_constraintBaseline_toBaselineOf="@+id/button5" />
<EditText
android:id="@+id/editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:ems="10"
android:hint="Type something here..."
android:inputType="textPersonName"
android:maxLines="1"
android:selectAllOnFocus="false"
android:textAlignment="center"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="3"
app:layout_constraintLeft_toRightOf="@+id/button2"
android:layout_marginLeft="8dp"
app:layout_constraintBaseline_toBaselineOf="@+id/button2" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="2"
app:layout_constraintTop_toTopOf="@+id/guideline3"
android:layout_marginTop="60dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="sendInput"
android:text="1"
app:layout_constraintRight_toLeftOf="@+id/button2"
android:layout_marginRight="8dp"
app:layout_constraintBaseline_toBaselineOf="@+id/button2" />
<Button
android:id="@+id/buttonSend"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:onClick="sendText"
android:text="Send"
app:layout_constraintRight_toLeftOf="@+id/guideline2"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="@+id/editText"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toTopOf="@+id/guideline3"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent" />
<android.support.constraint.Guideline
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/guideline2"
android:orientation="vertical"
app:layout_constraintGuide_end="192dp" />
<android.support.constraint.Guideline
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/guideline3"
app:layout_constraintGuide_begin="154dp"
android:orientation="horizontal" />
</android.support.constraint.ConstraintLayout>
发布您的布局xml – FAT
@FerdousAhamed张贴，谢谢。 – f3nr1r