在发行版本中找不到Android FileProvider类 [英] Android FileProvider class not found in release builds

问题描述

我正在使用FileProvider从设备获取照片.该实现在调试版本中运行正常(minifyEnabled为false)，但是在构建发行版本(minifyEnabled为true)时，出现错误:

I'm using a FileProvider to get photos from the device. The implementation works just fine in debug builds (minifyEnabled false) but when I'm building the release build (minifyEnabled true) I get an error:

java.lang.RuntimeException: Unable to get provider android.support.v4.content.FileProvider: 
java.lang.ClassNotFoundException: Didn't find class "android.support.v4.content.FileProvider" 
on path: DexPathList[[zip file "/data/app/com.package.name-2/base.apk"],
nativeLibraryDirectories=[/data/app/om.package.name-2/lib/arm, /vendor/lib, /system/lib]]

所以我想这与proguard设置有关

So I guess this has someting to do with the proguard setup

我有

compile 'com.android.support:support-v13:23.1.1'

这是我的gradle文件中v4的超集，

which is a superset of v4 in my gradle file and

minSdkVersion 21
targetSdkVersion 23

和

-keep class android.support.v4.app.** { *; }
-keep class android.support.v4.content.** { *; }
-keep interface android.support.v4.app.** { *; }
-keep interface android.support.v4.content.** { *; }
-keep class * extends android.content.ContentProvider

在我的proguard-rules.pro文件中

in my proguard-rules.pro file

我已经使用Android 5和6进行了测试，并且发生了同样的事情. 任何建议都会有用，谢谢.

I have tested with both Android 5 and 6 and same thing happens. Any suggestion would be usefull, thanks in advance.

推荐答案

我正在使用 androidx 库，并遇到相同的错误.因此，在 AndroidManifest.xml 中，我更改了这一行:

I was using androidx library and getting the same error. So, in AndroidManifest.xml, I changed this line:

android:name="android.support.v4.content.FileProvider"

对此:

android:name="androidx.core.content.FileProvider"

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