我曾多次尝试将 Android Studio 构建工具升级到 1.3.1 以上，但最终总是遇到此 libpng 错误。我通过完全删除 Maven 依赖项解决了其中一个错误（因为 gradle 控制台准确地指出了问题文件所在的位置），但现在我遇到了相同的错误，并且没有指向问题文件所在位置的指针。我错过了什么吗？这是 gradle 控制台日志：
Executing tasks: [:app:generateDebugSources, :app:generateDebugAndroidTestSources]
Configuration on demand is an incubating feature.
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preReleaseBuild UP-TO-DATE
:app:prepareComAndroidDatabindingAdapters10Rc3Library UP-TO-DATE
:app:prepareComAndroidDatabindingLibrary10Rc3Library UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72310Library UP-TO-DATE
:app:prepareComAndroidSupportCardviewV72310Library UP-TO-DATE
:app:prepareComAndroidSupportDesign2310Library UP-TO-DATE
:app:prepareComAndroidSupportMediarouterV72220Library UP-TO-DATE
:app:preDebugAndroidTestBuild UP-TO-DATE
:app:prepareComAndroidSupportMultidex101Library UP-TO-DATE
:app:prepareComAndroidSupportPercent2310Library UP-TO-DATE
:app:prepareComAndroidSupportRecyclerviewV72310Library UP-TO-DATE
:app:prepareComAndroidSupportSupportV42310Library UP-TO-DATE
:app:prepareComCrashlyticsSdkAndroidAnswers132Library UP-TO-DATE
:app:prepareComCrashlyticsSdkAndroidBeta113Library UP-TO-DATE
:app:prepareComCrashlyticsSdkAndroidCrashlytics252Library UP-TO-DATE
:app:prepareComCrashlyticsSdkAndroidCrashlyticsCore235Library UP-TO-DATE
:app:prepareComFacebookAndroidFacebookAndroidSdk410Library UP-TO-DATE
:app:prepareComFacebookFrescoDrawee061Library UP-TO-DATE
:app:prepareComFacebookFrescoFbcore061Library UP-TO-DATE
:app:prepareComFacebookFrescoFresco061Library UP-TO-DATE
:app:prepareComFacebookFrescoImagepipeline061Library UP-TO-DATE
:app:prepareComGithubRahatarmanahmedCircularprogressview232Library UP-TO-DATE
:app:prepareComGoogleAndroidExoplayerExoplayerR142Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServices810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAds810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAnalytics810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAppindexing810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAppinvite810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesAppstate810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesBase810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesBasement810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesCast810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesDrive810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesFitness810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesGames810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesGcm810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesIdentity810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesLocation810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesMaps810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesMeasurement810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesNearby810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesPanorama810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesPlus810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesSafetynet810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesVision810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesWallet810Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesWearable810Library UP-TO-DATE
:app:prepareIoFabricSdkAndroidFabric136Library UP-TO-DATE
:app:prepareDebugDependencies
:app:compileDebugAidl UP-TO-DATE
:app:compileDebugRenderscript UP-TO-DATE
:app:generateDebugResValues UP-TO-DATE
:app:generateDebugResources UP-TO-DATE
:app:mergeDebugResources
AAPT err(Facade for 961886319): libpng error: Not a PNG file
FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:mergeDebugResources'.
> Some file crunching failed, see logs for details
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 4.398 secs
下面是我的 build.gradle （模块：应用程序）
buildscript {
repositories {
maven { url 'https://maven.fabric.io/public' }
}
dependencies {
classpath 'io.fabric.tools:gradle:1.+'
}
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultConfig {
applicationId "us.revibe.revibe"
minSdkVersion 16
targetSdkVersion 23
versionCode 1
versionName "1.0"
multiDexEnabled = true
}
buildTypes {
debug{
debuggable true
}
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
dataBinding {
enabled = true
}
dexOptions {
javaMaxHeapSize "4g"
}
}
repositories {
// maven { url 'http://maven.livotovlabs.pro/content/groups/public' }
maven { url 'https://maven.fabric.io/public' }
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:appcompat-v7:23.1.0'
compile 'com.android.support:cardview-v7:23.1.0'
compile 'com.android.support:recyclerview-v7:23.1.0'
compile 'com.android.support:percent:23.1.0'
compile 'com.android.support:design:23.1.0'
compile files('libs/core-3.2.1.jar')
compile files('libs/retrofit-1.9.0.jar')
compile files('libs/connectionclass-1.0.1.jar')
compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.0'
compile 'com.squareup.okhttp:okhttp:2.3.0'
compile 'com.joanzapata.android:android-iconify:1.0.8'
compile 'com.github.rahatarmanahmed:circularprogressview:2.3.2'
compile 'com.facebook.android:facebook-android-sdk:4.1.0'
compile 'com.facebook.fresco:fresco:0.6.1+'
compile 'com.google.android.gms:play-services:8.1.0'
compile 'com.android.support:multidex:1.0.1'
compile 'com.amazonaws:aws-android-sdk-core:2.+'
compile 'com.amazonaws:aws-android-sdk-cognito:2.+'
compile 'com.amazonaws:aws-android-sdk-s3:2.+'
// compile ('eu.livotov.labs:zxscanlib:2.0.1@aar') {transitive=true}
compile 'com.google.android.exoplayer:exoplayer:r1.4.2'
compile('com.crashlytics.sdk.android:crashlytics:2.5.2@aar') {
transitive = true;
}
}
下面是我的顶级 build.gradle
buildscript {
repositories {
jcenter()
mavenCentral()
}
dependencies {
classpath "com.android.tools.build:gradle:1.5.0"
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
恢复到类路径“com.android.tools.build:gradle:1.3.1”似乎可以解决问题，但我想开始使用所有新功能
其实这个的原因是你的一些所谓的.png文件实际上不是PNG但其他一些类型（我主要怀疑它们是JPEGs，但其他人或可能是您已将它们重命名为.png文件扩展名只是为了欺骗 Eclipse。但要记住安卓工作室比那聪明:D )
为了确保进行检查，请打开可能在 Photoshop 之类的工具中出现此错误的 PNG 图像文件之一（Photoshop更好，因为如果文件扩展名与其实际格式不同，那么它也会给出错误。如果是这样，要找出图像文件的实际格式，请使用像这样的网络应用程序 http://metapicz.com/#landing).
解决方案：
在 Photoshop 中打开文件后，将其另存为 PNG。尝试构建这个，大多数情况下这个问题可能已经消失了。
希望这个答案对那里的人有帮助。
Cheers!
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