共享文件不需要导出提供程序，或grantUriPermission（）

Question

我一直在尝试解决一个问题与共享映像从外部存储目录。它在大多数设备中起作用，但在其他设备中不起作用。我有：1。添加了扩展FileProvider的类：

public class GenericFileProvider extends FileProvider {}

 <provider
            android:name=".Utils.GenericFileProvider"
            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>

 <?xml version="1.0" encoding="utf-8"?>
    <paths xmlns:tools="http://schemas.android.com/tools"
        xmlns:android="http://schemas.android.com/apk/res/android"
        tools:ignore="MissingDefaultResource">
        <external-path name="external_files" path="."/>
    </paths>

我的共享映像功能在下面：

 private fun shareInEmail() {
    val filename = "Avoir+$timeStamp.jpg"
    val filelocation = File(Environment.getExternalStorageDirectory().getAbsolutePath(), filename)
    val path : Uri = FileProvider.getUriForFile(
        requireContext(),
        context!!.applicationContext.packageName.toString() + ".provider",
        filelocation
    )

    context!!.grantUriPermission(
        "com.ideasfactory.mjcprojet",
        path,
        Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
    )

    val emailIntent = Intent(Intent.ACTION_SEND)
    emailIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
    // set the type to 'email'
    emailIntent.type = "vnd.android.cursor.dir/email"
    emailIntent.setType("text/plain")
    emailIntent.type = "application/jpg"
    val to = arrayOf("[e-mail]")
    emailIntent.putExtra(Intent.EXTRA_EMAIL, to)
    emailIntent.putExtra(Intent.EXTRA_BCC, arrayOf<String>())
    // the attachment
    emailIntent.putExtra(Intent.EXTRA_STREAM, path)
    // the mail subject
    emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Transaction")
    emailIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
    startActivity(Intent.createChooser(emailIntent, "Transaction"))


}

E/DatabaseUtils: Writing exception to parcel
java.lang.SecurityException: Permission Denial: reading com.ideasfactory.mjcprojet.Utils.GenericFileProvider uri content://com.ideasfactory.mjcprojet.provider/external_files/Avoir%2B2020-06-11%2011%3A08.jpg from pid=12602, uid=1000 requires the provider be exported, or grantUriPermission()
    at android.content.ContentProvider.enforceReadPermissionInner(ContentProvider.java:729)
    at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:602)
    at android.content.ContentProvider$Transport.enforceFilePermission(ContentProvider.java:593)
    at android.content.ContentProvider$Transport.openTypedAssetFile(ContentProvider.java:507)
    at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:307)
    at android.os.Binder.execTransactInternal(Binder.java:1021)
    at android.os.Binder.execTransact(Binder.java:994)

我将感谢你的帮助

Answer 1

嘿，我也遇到过同样的问题，经过大量研究，我发现问题出在provider_paths.xml.，我得到了许多不同可能性的不同路径。使用以下代码更改provider_paths.xml：

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">

  <cache-path name="cache" path="." />
  <external-path name="external" path="." />

  <root-path name="root" path="." />
  <files-path name="my_images" path="/" />
  <files-path name="my_images" path="myfile/"/>
  <files-path name="files" path="." />

  <external-path name="external_files" path="." />
  <external-path name="images" path="Pictures" />
  <external-path name="my_images" path="." />
  <external-files-path name="images" path="Pictures"/>
  <external-files-path name="camera_image" path="Pictures/"/>
  <external-files-path name="external_files" path="." />
  <external-files-path name="my_images" path="my_images" />

  <external-cache-path name="external_cache" path="." />
</paths>