我是Android的初学者,想在底部建立4个按钮,如图所示。中间的一个按钮是不可能的,因为我尝试将其设置为响应式并且消失了。您能向我解释一下我如何将这些按钮以相同的距离设置为彼此相邻,并使其以正确的方式做出响应吗?
这是我的xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
android:background="#f4f4f4"
tools:context=".MainActivity">
<TextView
android:id="@+id/textView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="0dp"
android:gravity="center_horizontal"
android:shadowColor="#000000"
android:text="This app has 50000 downloads!"
android:textColor="#eadca6"
android:textSize="60sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/guideline"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHeight_percent="0.70"
app:layout_constraintHorizontal_bias="0.50"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintWidth_percent="0.9" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.86" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.77" />
<Button
android:id="@+id/button12"
app:layout_constraintWidth_percent="0.2"
android:layout_height="wrap_content"
android:layout_width="0dp"
android:text="Button"
app:layout_constraintEnd_toStartOf="@+id/button13"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/button13" />
<Button
android:id="@+id/button13"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button"
android:textSize="20sp"
app:layout_constraintEnd_toStartOf="@+id/button14"
app:layout_constraintTop_toTopOf="@+id/guideline2"
app:layout_constraintHeigth_percent="0.1"
app:layout_constraintWidth_percent="0.2" />
<Button
android:id="@+id/button14"
app:layout_constraintWidth_percent="0.2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintEnd_toStartOf="@+id/button15"
app:layout_constraintTop_toTopOf="@+id/button13" />
<Button
android:id="@+id/button15"
app:layout_constraintWidth_percent="0.2"
android:layout_height="wrap_content"
android:text="Button"
android:layout_width="0dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="@+id/button13" />
</androidx.constraintlayout.widget.ConstraintLayout>
尝试一下
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
android:background="#f4f4f4"
tools:context=".MainActivity">
<TextView
android:id="@+id/textView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="0dp"
android:gravity="center_horizontal"
android:shadowColor="#000000"
android:text="This app has 50000 downloads!"
android:textColor="#eadca6"
android:textSize="60sp"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/guideline"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHeight_percent="0.70"
app:layout_constraintHorizontal_bias="0.50"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintWidth_percent="0.9" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.86" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.77" />
<Button
android:id="@+id/btnOne"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="One"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@id/btnTwo"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/btnTwo"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="Two"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@id/btnThree"
app:layout_constraintStart_toEndOf="@id/btnOne" />
<Button
android:id="@+id/btnThree"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="Three"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@id/btnFour"
app:layout_constraintStart_toEndOf="@id/btnTwo" />
<Button
android:id="@+id/btnFour"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="Four"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@id/btnThree" />
</androidx.constraintlayout.widget.ConstraintLayout>
输出
[尝试将所有按钮添加到线性布局中,并且将其方向设置为水平,并且按钮会占用等距离。要使按钮具有响应性,请使用onclicklistener();。得到回应
仅将每个按钮约束到下一个按钮,并将第一个按钮的开始约束到父对象的开始,将最后一个按钮的约束约束到父对象的末端,将所有宽度设置为0dp,这将使您的按钮尽可能水平扩展。然后在设计视图中选择所有按钮(使用ctrl键并单击),然后单击鼠标右键,转到链并选择水平链,这将使按钮之间的距离相等并生成一些代码,这不是您自己难做的,但是这样比较容易。使用此代码:
<androidx.constraintlayout.widget.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">
<Button
android:id="@+id/button4"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button3" />
<Button
android:id="@+id/button3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/button4"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button2" />
<Button
android:id="@+id/button2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/button3"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button" />
<Button
android:id="@+id/button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/button2"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
这是最终视图。您可以按自己喜欢的方式添加一些边距,并注意您也应该将文本视图添加到此布局中