Instant App：RuntimeException：无法获取提供程序 FileProvider：SecurityException：提供程序必须授予 uri 权限

Question

我尝试向我的应用添加免安装应用功能，但在将我的应用作为免安装应用启动时出现此错误：

RuntimeException: Unable to get provider android.support.v4.content.FileProvider: java.lang.SecurityException: Provider must grant uri permissions

这是它在我的feature Manifest 中的使用方式：

<manifest>

    <application>

        <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">

            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths" />

        </provider>

    </application>

</manifest>

还有我的即时应用build.gradle：

apply plugin: 'com.android.instantapp'

android {
    compileSdkVersion rootProject.compileSdk

    defaultConfig {
        applicationId "applicationId" // same than my app's APK module
        minSdkVersion rootProject.minSdk
        targetSdkVersion rootProject.compileSdk
        versionCode rootProject.versionCode
        versionName rootProject.versionName
    }

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

    }
}
dependencies {
    implementation project(':feature') // app's feature
}

怎么了？感谢您的帮助。

编辑：这是完整的 logcat：

02-13 17:51:28.501 28992-28992/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                   Process: package, PID: 28992
                                                   java.lang.RuntimeException: Unable to get provider android.support.v4.content.FileProvider: java.lang.SecurityException: Provider must grant uri permissions
                                                       at android.app.ActivityThread.installProvider(ActivityThread.java:6206)
                                                       at android.app.ActivityThread.installContentProviders(ActivityThread.java:5721)
                                                       at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5639)
                                                       at android.app.ActivityThread.-wrap2(ActivityThread.java)
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1637)
                                                       at android.os.Handler.dispatchMessage(Handler.java:105)
                                                       at android.os.Looper.loop(Looper.java:156)
                                                       at android.app.ActivityThread.main(ActivityThread.java:6523)
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
                                                    Caused by: java.lang.SecurityException: Provider must grant uri permissions
                                                       at android.support.v4.content.FileProvider.attachInfo(FileProvider.java:375)
                                                       at android.app.ActivityThread.installProvider(ActivityThread.java:6203)
                                                       at android.app.ActivityThread.installContentProviders(ActivityThread.java:5721) 
                                                       at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5639) 
                                                       at android.app.ActivityThread.-wrap2(ActivityThread.java) 
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1637) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:105) 
                                                       at android.os.Looper.loop(Looper.java:156) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:6523) 
                                                       at java.lang.reflect.Method.invoke(Native Method) 
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831) 
02-13 17:51:28.535 28932-28944/? E/Isotope: UID: [10188]  PID: [28932] IActivityManagerProxy : Instant app: package crashed: java.lang.RuntimeException: Unable to get provider android.support.v4.content.FileProvider: java.lang.SecurityException: Provider must grant uri permissions
                                                at android.app.ActivityThread.installProvider(ActivityThread.java:6206)
                                                at android.app.ActivityThread.installContentProviders(ActivityThread.java:5721)
                                                at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5639)
                                                at android.app.ActivityThread.-wrap2(ActivityThread.java)
                                                at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1637)
                                                at android.os.Handler.dispatchMessage(Handler.java:105)
                                                at android.os.Looper.loop(Looper.java:156)
                                                at android.app.ActivityThread.main(ActivityThread.java:6523)
                                                at java.lang.reflect.Method.invoke(Native Method)
                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
                                             Caused by: java.lang.SecurityException: Provider must grant uri permissions
                                                at android.support.v4.content.FileProvider.attachInfo(FileProvider.java:375)
                                                at android.app.ActivityThread.installProvider(ActivityThread.java:6203)
                                                at android.app.ActivityThread.installContentProviders(ActivityThread.java:5721) 
                                                at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5639) 
                                                at android.app.ActivityThread.-wrap2(ActivityThread.java) 
                                                at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1637) 
                                                at android.os.Handler.dispatchMessage(Handler.java:105) 
                                                at android.os.Looper.loop(Looper.java:156) 
                                                at android.app.ActivityThread.main(ActivityThread.java:6523) 
                                                at java.lang.reflect.Method.invoke(Native Method) 
                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941) 
                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831) 

Answer 1

看起来FileProvider O 不支持，因为不允许其他应用看到它的ContentProvider。

我有一个测试应用，它可以作为已安装的应用，但不能作为instant app。看起来免安装应用不允许使用grantUriPermission（授予 URI 权限）（考虑到安装的应用和@987654327 无法看到免安装应用的政策，这是有道理的@ 不可见）。

这意味着即时应用无法检索使用ACTION_IMAGE_CAPTURE 拍摄的照片（因为它们无法读取外部存储并且相机应用无法写入即时应用的私人存储）。

Answer 2

        <provider
            android:exported="false"
            android:grantUriPermissions="true"
            android:authorities="${applicationId}.fileprovider"
            android:name="androidx.core.content.FileProvider">
            <meta-data
                android:resource="@xml/file_paths"
                android:name="android.support.FILE_PROVIDER_PATHS"
                />
        </provider>