【错误记录】Android Studio 编译报错 ( AAPT: error: failed to read PNG signature: file does not start with PN )

一、报错信息

---

编译 Android Studio 项目时 , 报错

AGPBI: {
    
    "kind":"error","text":"Android resource compilation failed","sources":[{
    
    "file":"D:\\002_Project\\002_Android_Learn\\ClassLoader_Demo\\app\\src\\main\\res\\drawable\\abc.png"}],"original":"ERROR:D:\\002_Project\\002_Android_Learn\\ClassLoader_Demo\\app\\src\\main\\res\\drawable\\abc.png: AAPT: error: failed to read PNG signature: file does not start with PNG signature.\n    ","tool":"AAPT"}
AGPBI: {
    
    "kind":"error","text":"Android resource compilation failed","sources":[{
    
    "file":"D:\\002_Project\\002_Android_Learn\\ClassLoader_Demo\\app\\src\\main\\res\\drawable\\abc.png"}],"original":"ERROR:D:\\002_Project\\002_Android_Learn\\ClassLoader_Demo\\app\\src\\main\\res\\drawable\\abc.png: AAPT: error: file failed to compile.\n    ","tool":"AAPT"}

> Task :app:mergeDebugResources FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:mergeDebugResources'.
> A failure occurred while executing com.android.build.gradle.internal.res.Aapt2CompileRunnable
   > Android resource compilation failed
     ERROR:D:\002_Project\002_Android_Learn\ClassLoader_Demo\app\src\main\res\drawable\abc.png: AAPT: error: failed to read PNG signature: file does not start with PNG signature.
         
     ERROR:D:\002_Project\002_Android_Learn\ClassLoader_Demo\app\src\main\res\drawable\abc.png: AAPT: error: file failed to compile.
         

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 22s
57 actionable tasks: 3 executed, 54 up-to-date

二、解决方案

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报错的原因是 Android 项目中使用的 png 格式的图片格式错误 ,

在 build.gradle 中的 android 层级配置了

    aaptOptions {
    
    
        // aapt 附加参数
        additionalParameters '--rename-manifest-package', 'com.example.classloader_demo2'
        // 是否开启 png 图片优化检查
        cruncherEnabled true
    }

配置 , cruncherEnabled 配置的作用是开启 png 图片优化检查 ,

如果 png 图片格式错误 , 就会报上述错误 ;

解决方案 :

① 删除上述报错的 abc.png 图片即可 ;

② 如果想要保留上述图片 , 则将 " android # aaptOptions # cruncherEnabled " 设置为 false 即可 , 程序可编译完成 ;

    aaptOptions {
    
    
        // aapt 附加参数
        additionalParameters '--rename-manifest-package', 'com.example.classloader_demo2'
        // 是否开启 png 图片优化检查
        cruncherEnabled true
    }