Develop Reference

Android studio can not detect the source file in res/drawable

This is my code. I don't know how to post this image.
I tried to add source file for my ImageView. But it doesn't work. I tried to copy the path folder and it is still not work.

Solution - first problem
The resource name must start with a letter (not number).
Solution - second problem
Use just:
#drawable/039_cloud
instead
#drawable/039_cloud/039_cloud
so:
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/039_cloud" />
Android Studio
Android Studio is grouping same images, but for different DPIs.
When you choose Android view, you will have:
But when you will choose Project you will see "real" project structure:

Copy the image resource and paste it directly inside the drawable folder. Rename the image such that no number is included (e.g. image_thirty_nine.png). Then try this
<ImageView
android:id="#+id/image_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/image_thirty_nine" />
If you are till getting the same error after trying the above step, then try adding the image resource programmably
//ensure you assignn an id to your image
ImageView imageView = findViewById(R.id.image_id);
imageView.setImageResource(R.drawable.image_thirty_nine);
then run your code to see if it works

ImageView doesn't appear

I have dragged an ImageView to layout and I selected the picture. But when I execute the application, It doesn't appear. What can I do to solve this ?
ImageView XML code;
<ImageView
android:layout_width="250dp"
android:layout_height="250dp"
app:srcCompat="#mipmap/idlepoor_moneys"
android:id="#+id/imageView4"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />

Add this property in Your image View
android:src="#mipmap/idlepoor_moneys"
Remove the following line from your code
app:srcCompat="#mipmap/idlepoor_moneys"

As allready said change
app:srcCompat="#mipmap/idlepoor_moneys"
to
android:src="#mipmap/idlepoor_moneys"
Also I recommend to put your images in the #drawable folder. The mipmap is where app icons are stored when making an app.
app:src="#drawable/idlepoor_moneys"
You can easily find the drawable from your project map. If you can't find it you can always right click the folder to get the path to it.

Android Imageview

I have kept some .png file in res->drawable-hdpi and now, I want to show it in imageview in android. But when I refer to that image from image view, android says:
Couldn't resolve resource #drawable/my_pic.
I am using the following code :
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/my_pic" />
I am using every file name in small letter
The size of my_pic is 36kb
So how can I load the picture? Is this problem for size or something else. How to fix this problem. Any help ?

If you dont save your changes, you get a
"Couldn't resolve resource #drawable/my_pic."
Control+S ... to save Changes, its all or..
When the R.java have a problem, only needs:
(Project -> Clean from the menus)

Android XML Viewer failing

I've been having this problem for a while:
Here is my header.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:orientation="vertical">
<ImageView android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="#drawable/logo_text"/>
</LinearLayout>
And this what the Eclipse/Android XML viewer is giving me:
Unable to resolve drawable "C:\Users\Me\MyApp\res\drawable-hdpi\logo_text.png" in attribute "src"
This happens in other projects as well for seemingly random images. Project->Clean doesn't help either. I know this has to be an issue with my machine or eclipse installation because it doesn't happen on my work machine, only my home laptop.
There are no problems when the app is installed, but it would be nice to be able to see layout changes without having to install the app over and over again.
EDIT
I also get these messages anytime I use a custom View in a layout file:
error!
UnsupportedClassVersionError: Bad version number in .class file
Unable to resolve drawable "C:\Users\Me\MyApp\res\drawable-hdpi\logo_text.png" in attribute "src"
Exception details are logged in Window > Show View > Error Log

I sometimes have weird issues like this when importing new images into my project. Do you have any other res-image directories with different versions of this file? You may try removing the png and re-adding to the project.

The error message explicitly mentions the -hdpi version of the drawable directory. Have you got that image in all of the different versions of the drawable directory? Perhaps it is in res/drawable-ldpi or res/drawable-mdpi but not res/drawable-hdpi?
If you don't already have one, you could create a plain res/drawable folder and add the image there, then one would expect the system to fall back to that whenever it didn't find a definition-specific version.

Actually try to put an id tag on ImageView : android:id=:"#+id/imageView".Tell me if it is working or not.

Setting background for basic android app

I am currently working on a basic app using eclipse as my IDE. I am currently having trouble setting an image as my background. I was following a tutoral which told me to place my image in the drawable-mdpi folder and name it as icon. I have tried this but it keeps on placing in the andriod icon instead even when i delete the andriod icon image. Is there a better way of doing this?
Thanks

try this:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:gravity="center_horizontal" android:background="#drawable/background"></LinearLayout>
background is a .png file. with borders draw around it with Nine9Patch.
Hope this helps