Android：Drawable没有显示出来 [英] Android: Drawable not showing up

问题描述

我有一个相当简单的xml文件，里面有一个图像按钮。图形布局xml设计器上的图像显示正常，当我运行开发构建时显示正常，但是一旦我创建签名的apk文件并运行它，图像就不再显示了。这只是一个空按钮。我想不出有什么理由，有什么想法吗？ xml文件如下所示：

I have a fairly simple xml file that has an image button in it. The image shows up fine on the Graphical Layout xml designer, shows up fine when I run a development build, but as soon as I create the signed apk file and run it, the image no longer shows up. It's just an empty button. I can't think of a reason why, any ideas? The xml file looks like this:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/navigation_root"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

<TextView
    android:id="@+id/navigation_text"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="5dp"
    android:text="TextView"
    android:textAppearance="?android:attr/textAppearanceLarge" >
</TextView>

<SeekBar
    android:id="@+id/navigation_seekbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical"
    android:layout_weight="1"
    android:padding="5dp" >
</SeekBar>

<LinearLayout
    android:id="@+id/linearLayout1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="5dp" >

    <ImageButton
        android:id="@+id/part_select_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/chapter_select" >
    </ImageButton>

    <Button
        android:id="@+id/navigation_ok_button"
        android:layout_width="75dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:text="@string/ok" >
    </Button>

    <Button
        android:id="@+id/navigation_cancel_button"
        android:layout_width="75dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:text="@string/cancel" >
    </Button>
</LinearLayout>

图片 @ drawable / chapter_select 是一个相当小的（41 * 41）png文件，位于res / drawable文件夹中。

The image @drawable/chapter_select is a fairly small (41*41) png file that is in the res/drawable folder.

推荐答案

似乎这是一个android的错误，有时可绘制文件夹中的第一个图像不显示。在drawable文件夹中添加了一个名为aaaa.png的虚拟图像，问题解决了。在这里找到答案： ImageButton不显示特定的可绘制对象

Seems like this is a bug with android, where sometimes the first image in the drawable folder doesn't show up. Added a dummy image called aaaa.png to the drawable folder and problem was solved. Found the answer here: ImageButton does not display a particular drawable

这篇关于Android：Drawable没有显示出来的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！