CardView内部的TextView不显示

时间:2019-08-06 13:32:16

标签: android android-cardview

我的TextView布局中有一个CardView,但是它既没有显示在布局预览中,也没有显示在实时设备上。类似的问题也有“删除工具:android:text =“ ..”“之类的答案,等等,但这不是这里的问题。有什么想法吗?

这就是我要使用cardView的目的:

final image

<LinearLayout
    android:id="@+id/linearLayout2"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginStart="16dp"
    android:layout_marginTop="32dp"
    android:layout_marginEnd="16dp"
    android:orientation="horizontal"
    android:weightSum="100"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/explore_desc">

        <androidx.cardview.widget.CardView
            android:id="@+id/localEvents"
            android:layout_width="150dp"
            android:layout_height="75dp"
            android:layout_marginEnd="10dp"
            android:layout_weight="50"
            app:cardCornerRadius="12dp">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">


                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="8dp"
                    android:layout_marginTop="8dp"
                    android:layout_marginEnd="8dp"
                    android:layout_marginBottom="8dp"
                    android:fontFamily="@font/montserrat_bold"
                    android:text="@string/local_events"
                    android:textColor="@android:color/white"
                    android:textSize="14sp"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />


            </androidx.constraintlayout.widget.ConstraintLayout>

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scaleType="fitXY"
                android:src="@drawable/beach_bg_placeholder" />

        </androidx.cardview.widget.CardView>
</LinearLayout>

3 个答案:

答案 0 :(得分:2)

我尝试了您的代码,以下代码效果很好。由于ImageViewTextView堆积在LinearLayout内部,因此文本没有显示在ImageView的顶部。在ImageView将其放置在ImageView上方之后定义TextView,如下所示:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent" xmlns:app="http://schemas.android.com/apk/res-auto">

    <LinearLayout
            android:id="@+id/linearLayout2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="32dp"
            android:layout_marginEnd="16dp"
            android:orientation="horizontal"
            android:weightSum="100"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent">

        <androidx.cardview.widget.CardView
                android:id="@+id/localEvents"
                android:layout_width="150dp"
                android:layout_height="75dp"
                android:layout_marginEnd="10dp"
                android:layout_weight="50"
                app:cardCornerRadius="12dp">

            <ImageView
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:scaleType="fitXY"
                    android:src="@drawable/test" />



            <androidx.constraintlayout.widget.ConstraintLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">


                <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="8dp"
                        android:layout_marginTop="8dp"
                        android:layout_marginEnd="8dp"
                        android:layout_marginBottom="8dp"
                        android:text="Local Events"
                        android:textColor="@android:color/white"
                        android:textSize="14sp"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        android:elevation="@dimen/_10sdp"
                />


            </androidx.constraintlayout.widget.ConstraintLayout>

        </androidx.cardview.widget.CardView>
    </LinearLayout>
</LinearLayout>

屏幕截图:

enter image description here

答案 1 :(得分:0)

您的书写应如下所示

<?xml version="1.0" encoding="utf-8"?>
    <androidx.cardview.widget.CardView 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:orientation="vertical" android:layout_width="match_parent"
        android:layout_height="match_parent">


        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginBottom="8dp"
                android:text="TextV'ew"
                android:textColor="@color/colorPrimary"
                android:textSize="14sp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|center"
            android:layout_marginBottom="16dp"
            android:background="@drawable/america"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent" />
    </androidx.cardview.widget.CardView>

答案 2 :(得分:0)

Check out this

问题在于CardView内的ImageView隐藏了TextView。因此只需将可绘制图像用作cardview内RelativeLayout的背景即可,而cardview现在是TextView的父级。

所以尝试一下:

<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">



<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:layout_gravity="center">

    <androidx.cardview.widget.CardView
        android:id="@+id/cardView1"
        android:layout_width="150dp"
        android:layout_height="75dp"
        app:cardCornerRadius="12dp"
        android:layout_margin="8dp">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/beach_bg_placeholder">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Local Events"
                android:layout_centerInParent="true"
                android:textColor="@android:color/white"
                android:textSize="16sp"
                android:textStyle="bold"/>

        </RelativeLayout>

    </androidx.cardview.widget.CardView>


    <androidx.cardview.widget.CardView
        android:id="@+id/cardView2"
        android:layout_width="150dp"
        android:layout_height="75dp"
        app:cardCornerRadius="12dp"
        android:layout_margin="8dp">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/beach_bg_placeholder">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Local Events"
                android:layout_centerInParent="true"
                android:textColor="@android:color/white"
                android:textSize="16sp"
                android:textStyle="bold"/>

        </RelativeLayout>

    </androidx.cardview.widget.CardView>

</LinearLayout>


 <LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:layout_gravity="center">

    <androidx.cardview.widget.CardView
        android:id="@+id/cardView3"
        android:layout_width="150dp"
        android:layout_height="75dp"
        app:cardCornerRadius="12dp"
        android:layout_margin="8dp">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/beach_bg_placeholder">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Local Events"
                android:layout_centerInParent="true"
                android:textColor="@android:color/white"
                android:textSize="16sp"
                android:textStyle="bold"/>

        </RelativeLayout>

    </androidx.cardview.widget.CardView>


    <androidx.cardview.widget.CardView
        android:id="@+id/cardView4"
        android:layout_width="150dp"
        android:layout_height="75dp"
        app:cardCornerRadius="12dp"
        android:layout_margin="8dp">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/beach_bg_placeholder">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Local Events"
                android:layout_centerInParent="true"
                android:textColor="@android:color/white"
                android:textSize="16sp"
                android:textStyle="bold"/>

        </RelativeLayout>

    </androidx.cardview.widget.CardView>

  </LinearLayout>

</LinearLayout>