ImageView 显示白色图像 Android Studio Kotlin

Question

I am trying to display an image in my app, but it isn't getting displayed. Only a white square is displayed in place of the image. Here is the ImageView part of my xml :

<ImageView
        android:id="@+id/calcImg"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="28dp"
        android:layout_marginTop="222dp"
        android:layout_marginEnd="41dp"
        android:contentDescription="@null"
        android:layout_marginBottom="364dp"
        android:background="@drawable/calc"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/appName"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

Full xml :

<?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=".MainActivity">
    
    <TextView
        android:id="@+id/appName"
        android:gravity="center"
        android:layout_width="112dp"
        android:layout_height="73dp"
        android:text="Calc"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.886"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.414" />

    <ImageView
        android:id="@+id/calcImg"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/calc"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/appName"
        app:layout_constraintHorizontal_bias="0.51"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

Image in @drawable/calc :

Any help would be appreciated. Thanks!

PS: I have referred to similar questions on Stack Overflow , but they didn't solve my problem. If my question has already been asked, apologies. Thanks!

Answer 1

try to exchange this line

android:background="@drawable/calc"

to

android:src="@drawable/calc"

Answer 2

Could you try to remove those padding first? Like

<ImageView
        android:id="@+id/calcImg"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/calc"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/appName"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

Your margin is quite large, or can you paste what you see in LayoutInspector (better with the imageView's parameters)

Answer 3

Use

android:src="@drawable/calc"
app:layout_constraintEnd_toStartOf="parent"

Answer 4

maybe your image is in drawable-v21 folder.

check your image directory with windows explorer