This error occurred today after I updated Android Studio from 2.2 to 2.3 , and run app to my phone. Everything was OK last Friday. This Monday gift ruined my all day.
Gradle setting is "Use local gradle distribution", version 3.3 .
log info as below, because it's too long and all of them are similar, I just copied some segments:
Error: Some file crunching failed, see logs for details
:app:mergeDebugResources FAILED
AAPT: \\?\C:\Users\任\.android\build-cache\41cfce3bb6e2ca4b269727fe91725c24a067ec68\output\res\drawable-mdpi-v4\abc_btn_switch_to_on_mtrl_00012.9.png ERROR: Unable to open PNG file
AAPT: \\?\C:\Users\任\.android\build-cache\41cfce3bb6e2ca4b269727fe91725c24a067ec68\output\res\drawable-xxhdpi-v4\abc_ic_star_half_black_48dp.png ERROR: Unable to open PNG file
AAPT: \\?\C:\Users\任\.android\build-cache\41cfce3bb6e2ca4b269727fe91725c24a067ec68\output\res\drawable-hdpi-v4\abc_ic_menu_share_mtrl_alpha.png ERROR: Unable to open PNG file
AAPT: \\?\C:\Users\任\.android\build-cache\41cfce3bb6e2ca4b269727fe91725c24a067ec68\output\res\drawable-xxhdpi-v4\abc_text_select_handle_middle_mtrl_light.png ERROR: Unable to open PNG file
AAPT err(Facade for 925134644) : No Delegate set : lost message:\\?\C:\Users\任\.android\build-cache\41cfce3bb6e2ca4b269727fe91725c24a067ec68\output\res\drawable-hdpi-v4\abc_ic_star_half_black_48dp.png ERROR: Unable to open PNG file
AAPT err(Facade for 925134644) : No Delegate set : lost message:\\?\C:\Users\任\.android\build-cache\41cfce3bb6e2ca4b269727fe91725c24a067ec68\output\res\drawable-mdpi-v4\abc_switch_track_mtrl_alpha.9.png ERROR: Unable to open PNG file
build.gradle as below:
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion '25.0.2'
aaptOptions {
cruncherEnabled = false
}
defaultConfig {
minSdkVersion 18
targetSdkVersion 18
}
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
sourceSets {
main {
assets.srcDirs = ['src/main/assets', 'src/main/assets/']
}
}
useLibrary 'org.apache.http.legacy'
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:25.2.0'
compile 'com.android.support:support-v4:25.2.0'
compile 'com.jakewharton:butterknife:7.0.1'
compile 'org.jetbrains:annotations-java5:15.0'
}
}
According to advice from other questions, although some answers are just too outdated, still I have tried following ways, unfortunately, none of them saved me:
1. remove all .9.png files from my project.
2. check all png files are real PNG.
3. insert following settings to build.gradle :
aaptOptions {
cruncherEnabled = false
}
4. check project file path, not reaching 255 characters (Windows 10).
5. clear gradle caches.
6. Invalidate caches and restart.
7. clean project.
I think log info leads me to files auto-generated by Android Studio. Trying to search error .png files, none of them exists in my project.
Any advice is appreciated.
problem solved. The solution is here.
Related data as below:
1. According to release notes of Android Studio version 2.3, build cache is enabled by default.
2. so we should disable this setting. Here is official guide, Android Studio/User Guide/build-cache(link https://developer.android.com/studio/build/build-cache.html).
3. go to gradle.properties file, and disable build cache.
// To re-enable the build cache, either delete the following
// line or set the property to 'true'.
android.enableBuildCache=false
the other way is to modify build cache dir by adding
# first line can be skipped because true is the default value by 2.3
android.enableBuildCache=true
android.buildCacheDir =c:\\temp\\
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