Adding background to ImageButton Android

Issue

I have an issue which displays:

Error:(19, 29) No resource found that matches the given name 
(at 'background' with value '@drawable/unpressed').

Error:Execution failed for task ':app:processDebugResources'.
com.android.ide.common.process.ProcessException:
org.gradle.process.internal.ExecException: Process 'command
'Drive:\Users\...\sdk\build-tools\23.0.1\aapt.exe'' finished with non-zero exit value 1

Basically I want to add background to an ImageButton which will change after OnTouch() Event. For that first of all, I have to add an Image (a simple scenario without an Event)

---

I am facing the above mentioned problem in a simple case. I don't know what mistake am I making. My code for ImageButton is:

<ImageButton
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/imageButton"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="202dp"
    android:background="@drawable/unpressed"
/>

I have tried all of the solutions searched including:

• Clean Solution

• Rebuild Solution

• Update SDK (mentioned in STACK Solution) Libraries

• File > Invalidate Caches/Restart

• After pasting image in drawable, synchronized it.

As iGoda informed in the Comments. How can I find where the R settings exactly are changed?

Solution

After a long time, the problem solved by:

• deleting the files in the path: C:\Users\UserName\AppData\Local\Temp

• If any of the folder in above path is not visible to you, kindly show the hidden files by going into the following Options in the menu bar of Windows Explorer: Organize -> Folder and Search Options(For Windows-7)

  • Restart system and then check. It will all be fine.

Answered By - Asif Mehmood