ERR_UNKNOWN_URL_SCHEME when load text file using fileprovider

Question

Provider in manifest.xml

<!-- File Provider -->
    <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="com.example.test.fileprovider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths"/>
    </provider>

Resource file

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

Use of fileprovider

Uri uri = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".fileprovider", file);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "*/*");
intent.startActivity(intent);

Reference : here

Description : I can't open image, text file, pdf using this file provider. When i open the file text file its give me ERR_UNKNOWN_URL_SCHEME. If i open image or pdf its nothing show anything

/storage/emulated/0/KOOPSv3Sales/KOOPSv3Sales Message Attachment/29ca8aed.txt — Sumit Bhatt, Jan 23 '17 at 09:38
content://com.example.test.fileprovider/external_files/KOOPSv3Sales/KOOPSv3Sales Message Attachment/29ca8aed.txt could not be loaded because ERR_UNKNOWN_URL_SCHEME — Sumit Bhatt, Jan 23 '17 at 09:53
Can you open the file yourself with getContentResolver().openInputStream(uri) ? And file.exists() returns true? — greenapps, Jan 23 '17 at 10:19
`When i open the file text file`. Unclear. You are not opening it i think. Nor your app. But an app the user chooses from the list. So the message is from that app. Try other apps. Maybe the app you choosed does not know about content:// schemes. — greenapps, Jan 23 '17 at 10:21
` If i open image or pdf its nothing show anything`. You should mention the apps the user choosed. And Android version. — greenapps, Jan 23 '17 at 10:24

score 2 · Answer 1 · answered Jan 19 '18 at 09:49

You need to add the "FLAG_GRANT_READ_URI_PERMISSION" flag to your intent:

Uri uri = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".fileprovider", file);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "*/*");
intent.addFlags(FLAG_GRANT_READ_URI_PERMISSION);
intent.startActivity(intent);

https://developer.android.com/reference/android/content/Intent.html#FLAG_GRANT_READ_URI_PERMISSION

FLAG_GRANT_READ_URI_PERMISSION If set, the recipient of this Intent will be granted permission to perform read operations on the URI in the Intent's data and any URIs specified in its ClipData. When applying to an Intent's ClipData, all URIs as well as recursive traversals through data or other ClipData in Intent items will be granted; only the grant flags of the top-level Intent are used.

Nice, this solved it in my case. It is weird, since I thought the `grantUriPermissions` in the manifest for the provider would be sufficient. — Peterdk, May 14 '19 at 16:41

ERR_UNKNOWN_URL_SCHEME when load text file using fileprovider

1 Answers1