libpng error: Not a PNG file Error Showing In Andr

问题:

I just Imported a project from Eclipe to Android Studio. Just a plain and simple project. But the project folder is showing one error .

May I know what is the correct way to achieve my objective? I am new in Android-studio .Does any guys meet this issue?Any help would be greatly appreciated.

Here is Logcat :

Execution failed for task ':app:mergeDebugResources'.
> Error: Failed to run command:
    /home/amiya/android-studio/sdk/build-tools/android-4.4.2/aapt s -i /home/amiya/vola/app/src/main/res/drawable-mdpi/call.png -o /home/amiya/vola/app/build/res/all/debug/drawable-mdpi/call.png
  Error Code:
    42
  Output:
    libpng error: Not a PNG file

Here is my build.gradle

 apply plugin: 'android'

android {


    compileSdkVersion 19
    buildToolsVersion "19.0.3"



    defaultConfig {
        minSdkVersion 17
        targetSdkVersion 19
    }


    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }



}

dependencies {
    compile 'com.android.support:appcompat-v7:+'
    compile 'com.android.support:support-v4:+'
    compile 'com.google.android.gms:play-services:+'
    compile files('libs/google-play-services.jar')
    compile files('libs/livesdk.jar')
}

I am not using this file anywhere in my project with that name !! There are many other png files in my project though.

回答1:

You should follow below steps.

1. Cut-paste the image on my desktop.

2. Opened it in an editor saved it as png. without renaming the file name.

3. Copy-pasted the .png image into the drawable folder.

You can use cruncherEnabled.

Returns true if the PNGs should be crunched, false otherwise.

android 
{ 
   aaptOptions
   {
   cruncherEnabled = false
   } 
}

Hope this helps you.

回答2:

Try this in build.gradle

android {
    ....
    aaptOptions {
        cruncherEnabled = false
    }
    ....
}

回答3:

Try run command

find . -type f -name "*.png" | xargs -L 1 -I{} file  -I {} | grep -v 'image/png; charset=binary$'

in your root project directory, it will show you all files that have .png extension, but are not pngs. Then you can resave them as png in some image editor. Before running this command clean project, to speed up the process.

回答4:

It might be because of renaming problem of the Image just cut the images and paste any where in the system and open each with the respective editor and save as the same but of PNG format and then copy and paste again to drawable folders. It works for me

AND PLEASE LOOK AT THE ISSUE WHICH I SUBMITTED TO THE ANDROID STUDIO TEAM

Hope it will help you all .

回答5:

If you are using Mac OS, follow the steps below to get a png

1. Open image in preview
2. Go to file -> Export
3. Set format as png
4. Click on save

This will give you a valid png

Mere renaming or changing extension won't work in Mac OS.

回答6:

"PNG" in the error is clearly written in caps. So you need to see that the image has .PNG extension (in Capital).

Step 1: Open the image in Paint.

Step 2: Save the image Save as .PNG shown as below Click here to see how to save the image in PNG

Step 3: Refresh your project

Step 4: You should see like this -> See here

Please do reply if the issue is still not resolved

回答7:

As for me, what was happening is that I cloned the repository on Windows, and those PNG files were symlinks in Linux/Mac, but on Windows they were just invalid files. Once I did proper copies of the files instead of being symlinks, the build worked.

回答8:

Try to use another png files. It seems something wrong with png's metadata. I had the same issue. Then I used some other png files and it fixed my issue.