我将图像在屏幕上居中放置,如下所示:
<androidx.constraintlayout.motion.widget.ConstraintLayout
android:id="@+id/dashboardConstraintLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.AppCompatImageView
android:id="@+id/logo"
android:layout_width="155dp"
android:layout_height="20dp"
android:scaleType="centerCrop"
app:srcCompat="@drawable/ic_logo"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</androidx.constraintlayout.motion.widget.ConstraintLayout>
我想做的是使图像从其中心位置向下偏移50dp。添加marginTop不起作用。所要做的就是在屏幕顶部限制图像的位置添加空白。图像仍保留在中央。但我希望它向下移动50dp。
答案 0 :(得分:0)
我尝试了一下,它工作正常,并且突出显示了我更改的代码
<?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"
tools:context=".Third">
<androidx.appcompat.widget.AppCompatImageView //it is normar imageView in centered
android:id="@+id/logo"
android:layout_width="155dp"
android:layout_height="20dp"
android:scaleType="centerCrop"
android:src="@drawable/ic_launcher_background"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<androidx.appcompat.widget.AppCompatImageView //in this imageView i used marginTop and it works perfectly
android:id="@+id/logo1"
android:layout_width="155dp"
android:layout_height="20dp"
android:scaleType="centerCrop"
android:src="@drawable/two"
android:layout_marginTop="50dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<androidx.appcompat.widget.AppCompatImageView //in this imageView i used vertical_bias and it work perfectly.
android:id="@+id/logo2"
android:layout_width="155dp"
android:layout_height="20dp"
android:scaleType="centerCrop"
android:src="@drawable/ic_launcher_background"
app:layout_constraintVertical_bias="0.60" //there is 0.0=Top, 0.50=center, 1.0=Bottom and so on.
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
输出为:-