[英]TextView disappearing when I try to put it in front of my ImageView
我有一個水平滾動視圖,里面有一個相對布局,其中有3個ImageViews。 每個圖像視圖均顯示特定國家/地區的圖像。 我的目標是在每個ImageView的前面顯示一個TextView,以顯示國家/地區名稱。 問題是,每當我嘗試將TextView放在ImageView前面時,它就會消失...你們知道為什么嗎? Relative Layout
是處理此問題的最佳方法嗎?
我已經嘗試過相對布局,約束布局,線性布局和框架布局。 我已經在StackOverflow上看到了所有先前詢問的問題,但沒有一個解決了我的問題。 提前致謝!
編輯:
<?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"
android:background="@color/colorWhite"
>
<TextView
android:id="@+id/txtDescHome3"
android:layout_width="278dp"
android:layout_height="26dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginStart="32dp"
android:layout_marginTop="59dp"
android:text="@string/sloganHome"
android:textColor="#323B45"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="@+id/txtTitleHome3"
android:layout_width="wrap_content"
android:layout_height="31dp"
android:layout_above="@+id/txtDescHome3"
android:layout_alignStart="@+id/txtDescHome3"
android:layout_marginBottom="-59dp"
android:text="@string/ExploreTitulo"
android:textColor="#323B45"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.108"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.025" />
<HorizontalScrollView
android:id="@+id/scrlVPrincipal2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:layout_marginTop="32dp"
android:scrollbars="none"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtDescHome3"
app:layout_constraintVertical_bias="1.0"
tools:ignore="MissingConstraints"
tools:layout_editor_absoluteX="0dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="@+id/imgCard1"
android:layout_width="259dp"
android:layout_height="390dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_weight="2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.504"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.801" />
<TextView
android:id="@+id/txtNomePais"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_marginStart="53dp"
android:layout_weight="1"
android:text="TextView"
android:textSize="24sp"
app:layout_constraintBottom_toTopOf="@+id/scrlVPrincipal2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.064"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0" />
<ImageView
android:id="@+id/imgCard3"
android:layout_width="259dp"
android:layout_height="390dp"
android:layout_alignParentStart="true"
android:layout_alignTop="@+id/imgCard1"
android:layout_marginStart="289dp"
android:layout_weight="1"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.8" />
<ImageView
android:id="@+id/imgCard2"
android:layout_width="259dp"
android:layout_height="390dp"
android:layout_alignParentTop="true"
android:layout_alignStart="@+id/imgCard1"
android:layout_weight="1"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.006"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
</RelativeLayout>
</HorizontalScrollView>
</android.support.constraint.ConstraintLayout>
使用framelayout如下:
<FrameLayout android:layout_height="200dp"
android:layout_width="200dp">
<ImageView android:layout_height="match_parent"
android:layout_width="match_parent"
android:src="@color/Black"/>
<TextView android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="asdf"
android:textColor="#fff"
android:textAlignment="center"
android:layout_gravity="bottom"/>
</FrameLayout>
嘗試將您的textview放在imageview之后的布局xml中,例如:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/image_splash_screen"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center
android:background="@drawable/splash_bg" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textColor="@color/white"
android:textSize="55dp"
android:text="sample"/>
</FrameLayout>
做框架布局。 在該框架布局中,放置一個imageView和一個relativelayout。 圖像放在imageView中,其他所有內容都放在RelativeLayout中。 RelativeLayout將位於它們的圖像上方。
示例(不基於您的示例-僅來自我的一個項目):
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.x.x">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/imageView"
android:src="@drawable/img"
android:scaleType = "centerCrop"
/>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.x.y">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="YOUR TEXT"
android:textColor="#f3ffe3"
android:textSize="50dp"
android:id="@+id/textView2"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="95dp" />
</RelativeLayout>
</FrameLayout>
我已經按照我的理解嘗試過,並且還附上了屏幕截圖,請使用 下面的代碼
<?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"
android:background="@android:color/white"
>
<TextView
android:id="@+id/txtDescHome3"
android:layout_width="0dp"
android:layout_height="26dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginBottom="412dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:text="@string/sloganHome"
android:textColor="#323B45"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtTitleHome3" />
<TextView
android:id="@+id/txtTitleHome3"
android:layout_width="0dp"
android:layout_height="31dp"
android:layout_above="@+id/txtDescHome3"
android:layout_alignStart="@+id/txtDescHome3"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:text="@string/ExploreTitulo"
android:textColor="#323B45"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<HorizontalScrollView
android:id="@+id/horizontalScrollView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="16dp"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtDescHome3"
app:layout_constraintVertical_bias="0.851">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:scaleType="fitXY"
android:src="@drawable/bg"
android:visibility="visible" />
<TextView
android:id="@+id/textView18"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="jbdfjbvjcbvdkjbvdkjb"
android:textAppearance="@style/TextAppearance.AppCompat.Title"
android:textColor="@android:color/holo_blue_bright"
android:textSize="14sp"
android:textStyle="bold"
android:visibility="visible" />
</RelativeLayout>
</LinearLayout>
</HorizontalScrollView>
</android.support.constraint.ConstraintLayout>
<?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">
<ImageView
android:id="@+id/image_view"
android:layout_width="200dp"
android:layout_height="300dp"
android:src="#852"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
/>
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:layout_marginRight="6dp"
android:background="#000"
android:text="Text......"
android:paddingTop="5dp"
android:gravity="center_vertical"
android:textColor="#fff"
app:layout_constraintBottom_toBottomOf="@+id/image_view"
app:layout_constraintEnd_toEndOf="@+id/image_view"
app:layout_constraintStart_toStartOf="@+id/image_view"
/>
</android.support.constraint.ConstraintLayout>
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