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在ImageView上添加TextView(Android)(Add TextView over ImageView (Android))

我在ImageView中显示全屏图像,我试图在ImageView的屏幕中心添加TextView,但TextView没有显示。

我试过了:

<?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"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/splash_imageview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scaleType="centerCrop" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="20dip"
        android:background="#AA000000"
        android:padding="12dip"
        android:text="SomeText"
        android:textColor="#ffffffff" />

</LinearLayout>

i am displaying full screen image in ImageView and i am trying to add TextView in center of screen over ImageView but TextView is not showing.

i tried:

<?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"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/splash_imageview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scaleType="centerCrop" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="20dip"
        android:background="#AA000000"
        android:padding="12dip"
        android:text="SomeText"
        android:textColor="#ffffffff" />

</LinearLayout>

原文:https://stackoverflow.com/questions/27425026
更新时间:2019-12-07 10:26

最满意答案

您可以使用FrameLayoutAbsoluteLayout (不建议使用)或RelativeLayout (最常见的)。 RelativeLayout一个例子,用于居中使用android:layout_centerInParent="true"

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/splash_imageview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_centerInParent="true"
        android:scaleType="centerCrop" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="20dip"
        android:layout_centerInParent="true"
        android:background="#AA000000"
        android:padding="12dip"
        android:text="SomeText"
        android:textColor="#ffffffff" />

</RelativeLayour>

绘图view与XML中的顺序相同,因此首先绘制ImageView ,然后绘制TextView ,但view.bringToFront() android:elevation xml属性以及view.bringToFront() Java方法


you may use FrameLayout, AbsoluteLayout (deprecated) or RelativeLayout (most common of these). an example of RelativeLayout, for centering is used android:layout_centerInParent="true"

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/splash_imageview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_centerInParent="true"
        android:scaleType="centerCrop" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="20dip"
        android:layout_centerInParent="true"
        android:background="#AA000000"
        android:padding="12dip"
        android:text="SomeText"
        android:textColor="#ffffffff" />

</RelativeLayour>

drawing views is in same order as in XML, so ImageView will be drawn first and then TextView, but remeber about android:elevation xml attribute and also view.bringToFront() Java method

2018-07-05

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