Android 11及以上版本中通过Intent分享应用私有文件时权限拒绝问题求助

Hey there, let's tackle this permission issue you're facing! The error message you're seeing happens because even though you added the FLAG_GRANT_READ_URI_PERMISSION flag, the permission isn't being correctly passed to the target app when using Intent.createChooser(). Plus, there are a couple of missing pieces in your Intent setup that are causing problems.

Why This Happens #

1. Incorrect Intent Setup: You commented out the Intent.ACTION_SEND initialization, and you're using data = imageUri instead of the standard EXTRA_STREAM for sharing content. Most share targets expect EXTRA_STREAM for media files, not the data field.
2. Permission Forwarding: When using createChooser(), the system's chooser app acts as an intermediary. The permission flag you set on your original Intent might not automatically propagate to the app the user selects.

Step-by-Step Fix #

1. Correct Your Share Intent Setup

First, properly initialize the share Intent with the right action, MIME type, and use EXTRA_STREAM to pass the URI. Here's the revised code:

val imagePath = File(this.filesDir, "photos")
val newImageFile = File(imagePath, currentImage.imageName)
val imageUri = FileProvider.getUriForFile(this, "$packageName.provider", newImageFile)

// Initialize the share intent correctly
val shareContentIntent = Intent(Intent.ACTION_SEND).apply {
    // Set the MIME type to match your image
    type = "image/*"
    // Use EXTRA_STREAM to pass the image URI (standard for ACTION_SEND)
    putExtra(Intent.EXTRA_STREAM, imageUri)
    // Grant read permission to the target app
    addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
}

// Launch the chooser
startActivity(Intent.createChooser(shareContentIntent, "Share Image"))

2. Optional: Explicitly Grant Permissions to All Target Apps

If some apps still refuse to read the image (a rare edge case), you can explicitly grant the URI permission to every app that can handle your share Intent. Add this code before launching the chooser:

// Get all apps that can handle the share intent
val resInfoList = packageManager.queryIntentActivities(shareContentIntent, PackageManager.MATCH_DEFAULT_ONLY)

// Grant read permission to each of these apps
for (resolveInfo in resInfoList) {
    val packageName = resolveInfo.activityInfo.packageName
    grantUriPermission(
        packageName,
        imageUri,
        Intent.FLAG_GRANT_READ_URI_PERMISSION
    )
}

Verify Your Existing Configurations #

Your AndroidManifest.xml and file_paths.xml look correct, but just double-check:

• The android:authorities in your provider matches the one you pass to FileProvider.getUriForFile() (it does in your code: $packageName.provider)
• The files-path in file_paths.xml correctly points to your photos directory inside app-specific files (which it does: path="photos/")

Why This Works #

• Using EXTRA_STREAM instead of data aligns with Android's sharing conventions for media files, ensuring apps recognize the content you're sending.
• Explicitly granting permissions via grantUriPermission() guarantees that every potential share target has access to the URI, bypassing any issues with permission propagation through the chooser.

Give this a try—your share functionality should now work without needing to move images to a public directory!

内容的提问来源于stack exchange，提问作者Waqas Younis