[英]Recycler view cannot be at the bottom?
我正在尝试在线性布局的底部添加一个水平回收视图,但它总是从线性布局的顶部开始,这是我的代码
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout 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:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<androidx.fragment.app.FragmentContainerView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fragment_container_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.cardview.widget.CardView
android:id="@+id/cardView"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="16dp"
android:layout_marginRight="16dp"
android:background="@color/white"
android:divider="@android:color/transparent"
android:elevation="100dp"
android:foreground="?android:attr/selectableItemBackground"
android:orientation="vertical"
app:cardBackgroundColor="@android:color/white"
app:cardCornerRadius="6dp"
app:cardElevation="66dp"
app:cardPreventCornerOverlap="false"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.076"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<ImageView
android:id="@+id/menu_image_view"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center_vertical"
android:layout_marginStart="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/menu_icon" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:layout_marginRight="5dp"
android:layout_weight="1"
android:layoutDirection="ltr"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/frameLayout2"
app:layout_constraintStart_toEndOf="@+id/menu_image_view"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:id="@+id/medfast_linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:layoutDirection="ltr"
android:orientation="horizontal"
android:visibility="visible">
<com.plus.medfast.customViews.views.CustomRegularTextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:text="@string/be_healthy" />
</LinearLayout>
<LinearLayout
android:id="@+id/zinc_linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:layoutDirection="ltr"
android:orientation="horizontal"
android:visibility="gone">
<ImageView
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_weight="1.3"
android:src="@drawable/medfast_word_only" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="3dp"
android:layout_marginRight="-2dp"
android:layout_weight="1.7"
android:gravity="center">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/ic_deal" />
</LinearLayout>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/zinc" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1.9">
<FrameLayout
android:id="@+id/frameLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_weight="1.1"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/medfast_ads_image_view"
android:layout_width="40dp"
android:layout_height="50dp"
android:layout_gravity="left"
android:src="@drawable/ic_logo"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/medfast_ads_text_view"
android:layout_width="15dp"
android:layout_height="15dp"
android:layout_gravity="top|end"
android:layout_marginTop="24dp"
android:background="@drawable/circle_view_white_solid"
android:gravity="center"
android:text="10"
android:textColor="@color/white"
android:textSize="10dp"
app:layout_constraintBottom_toTopOf="@+id/medfast_ads_image_view"
app:layout_constraintEnd_toEndOf="@+id/medfast_ads_image_view"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>
<FrameLayout
android:id="@+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_weight="1.3"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/normal_ads_image_view"
android:layout_width="30dp"
android:layout_height="40dp"
android:layout_gravity="left"
android:src="@drawable/ic_notification"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/normal_ads_text_view"
android:layout_width="15dp"
android:layout_height="15dp"
android:layout_gravity="top|end"
android:layout_marginTop="16dp"
android:background="@drawable/circle_view_white_solid"
android:gravity="center"
android:text="10"
android:textColor="@color/white"
android:textSize="10dp"
app:layout_constraintBottom_toTopOf="@+id/normal_ads_image_view"
app:layout_constraintEnd_toEndOf="@+id/normal_ads_image_view"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:layout_width="match_parent"
android:gravity="bottom"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="@+id/focused_service_name_text_view"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/services_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false" />
</LinearLayout>
<com.plus.medfast.customViews.views.CustomBoldTextView
android:id="@+id/focused_service_name_text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:gravity="center"
android:textColor="@color/colorPrimary"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_maps_navigation_drawer"
app:menu="@menu/core_activity_navigation_drawer" />
</androidx.drawerlayout.widget.DrawerLayout>
但结果如下图所示,我需要 recyclerview 位于底部,因为我不想将视图的 Y 轴向上平移
我的 xml 中的所有内容都写得很好。 将 marginTop=20 添加到回收站视图项后,它运行良好
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/root_view"
android:layout_width="90dp"
android:layout_height="90dp"
android:layout_marginTop="20dp"
android:layout_marginBottom="20dp"
android:gravity="center"
android:orientation="vertical">
<LinearLayout
android:layout_width="80dp"
android:layout_height="80dp"
android:background="@drawable/circle_view_red"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/service_image_view"
android:layout_width="50dp"
android:layout_height="50dp"
android:padding="5dp" />
<com.plus.medfast.customViews.views.CustomBoldTextView
android:id="@+id/service_name_text_view"
android:layout_width="60dp"
android:layout_height="match_parent"
android:layout_marginTop="-5dp"
android:gravity="center"
android:text="Test"
android:textColor="@color/white"
android:textSize="10dp"
android:visibility="visible" />
</LinearLayout>
</LinearLayout>
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