Failed to read PNG signature: file does not start with PNG signature

Gradle build failing with this error:

Error:C:\Users\Roman\.gradle\caches\transforms-1\files-1.1\appcompat-v7-26.0.2.aar\bab547c3f1b8061ef9426f524a823a15\res\drawable-xhdpi-v4\abc_btn_switch_to_on_mtrl_00001.9.png failed to read PNG signature: file does not start with PNG signature

Error:java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.internal.aapt.AaptException: AAPT2 compile failed:
Error:Execution failed for task ':app:mergeDebugResources'.
Error: java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.internal.aapt.AaptException: AAPT2 compile failed:
aapt2 compile --legacy -o C:\dev\workspace\android2\MatrixCalculator\app\build\intermediates\res\merged\debug C:\Users\Roman\.gradle\caches\transforms-1\files-1.1\appcompat-v7-26.0.2.aar\bab547c3f1b8061ef9426f524a823a15\res\drawable-xhdpi-v4\abc_btn_switch_to_on_mtrl_00001.9.png
Issues:
 - ERROR: C:\Users\Roman\.gradle\caches\transforms-1\files-1.1\appcompat-v7-26.0.2.aar\bab547c3f1b8061ef9426f524a823a15\res\drawable-xhdpi-v4\abc_btn_switch_to_on_mtrl_00001.9.png failed to read PNG signature: file does not start with PNG signature

Some basic things i've tried to solve this issue:

1. Invalidate caches/restart
2. Deleting gradle folder

Solution 1:

It's likely a JPG renamed to a PNG file, not an actual PNG file
The problem could be because of the wrong extension of images.

In my case, the file was a JPEG image but it was saved as PNG not converted to. In this situation change extension to the real one and convert to PNG then retry.

For instance, you have ic_logo.png but it's actually a JPG image.
You should rename it back to ic_logo.jpg and use something like Photoshop to convert the image to PNG format.

Solution 2:

Steps

1. In build.gradle

   aaptOptions { cruncherEnabled = false }

2. Delete content inside C:\Users\.gradle\caches

3. Restart Android Studio

Solution 3:

android {
    buildTypes {
        release {
            crunchPngs false // or true
        }
    }
}







 buildTypes {
        debug {
            signingConfig signingConfigs.debug
        }
        release {
            crunchPngs false // or true

            lintOptions {
                checkReleaseBuilds false
                abortOnError false
            }
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }