Android device is not showing the background image

Question

I have created a project, targeting android 4.4 - API Level 19 , as suggested by eclipse.

Anyways, on the emulator everything looks perfect - here is a screenshot:

The problems comes when I install it on my real device - running android 4.1.2 . Everything is just perfect and working like a charm, excepting the background image. It is showing a white background, like the picture does not exists.

Here is my xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    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=".MainActivity" 
    android:orientation="vertical"
    android:gravity="center"
    android:padding="30dp"
    android:background="@drawable/wg_blurred_backgrounds_12"
>

<Button
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/btnTopJokes" 
    android:onClick="showTopJokes"   
    android:gravity="center" 
/>

<Button
    android:layout_marginTop="10dp"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/btnNewJokes" 
    android:onClick="showNewJokes" 
    android:gravity="center"
/>

<Button
    android:layout_marginTop="10dp"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/btnAllJokes" 
    android:onClick="showAllJokes" 
    android:gravity="center"
/>

<Button
    android:layout_marginTop="10dp"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/btnMyFavorites" 
    android:onClick="showFavorites" 
    android:gravity="center"
/>

<Button
    android:layout_marginTop="10dp"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/btnCategories" 
    android:onClick="showCategories"
    android:gravity="center"
/>

<Button
    android:layout_marginTop="10dp"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/btnAddNewJoke" 
    android:gravity="center"
/>

</LinearLayout>

Isn't android:background="@drawable/wg_blurred_backgrounds_12 working on android 4.1.2 ?

Do I have to change anything in the premissions? Here is what I have now:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

I know that I miss something really small, but I'm not able to spot it as a beginner.

Answer 1

Try with a lower-resolution background. The one you are trying might be too big. You can check that in your logcat.

Answer 2

In your logcat you will see a message like this:

Bitmap too large to be uploaded into a texture (2496x4437, max=4096x4096)

The max is 4096x4096 which is the value GL_MAX_TEXTURE_SIZE for the version of OpenGL that is running on the device.

Answer 3

you may need to add this to your manifest file . android:hardwareAccelerated="false" , android:largeHeap="true"

 <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/logo"
        android:supportsRtl="true"
        android:hardwareAccelerated="false"
        android:largeHeap="true"
        android:theme="@style/AppTheme">

Answer 4

尝试删除那些赋予可绘制名称的下划线。

Answer 5

Need to check drawable size.Add the image in four resolutions.

http://developer.android.com/guide/practices/screens_support.html

Answer 6

将图像保存在可绘制的每个文件夹中，例如 xhdpi、xxhdpi、xxxhdpi 中的分辨率。

Answer 7

Decrease Height And Width of the Image . This will solve problem . You can see image too large error generated by logcat also

Answer 8

确保它没有在可绘制文件中的图像文件旁边显示(24)或(v 24) ，重新复制图像并将其保存为没有(24)的类型，因为它会准备它用于API 24及更高版本，我的手机使用这就是它在我的部分API 23上失败的原因。

Answer 9

You can also try to disable hardware acceleration to the view you are setting background

myView.setLayerType(View.LAYER_TYPE_SOFTWARE, null)

and then set the background