android file content,Android: Getting a file URI from a content URI?

If you have a content Uri with content://com.externalstorage... you can use this method to get absolute path of a folder or file on Android 19 or above.

public static String getPath(final Context context, final Uri uri) {

final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

// DocumentProvider

if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {

System.out.println("getPath() uri: " + uri.toString());

System.out.println("getPath() uri authority: " + uri.getAuthority());

System.out.println("getPath() uri path: " + uri.getPath());

// ExternalStorageProvider

if ("com.android.externalstorage.documents".equals(uri.getAuthority())) {

final String docId = DocumentsContract.getDocumentId(uri);

final String[] split = docId.split(":");

final String type = split[0];

System.out.println("getPath() docId: " + docId + ", split: " + split.length + ", type: " + type);

// This is for checking Main Memory

if ("primary".equalsIgnoreCase(type)) {

if (split.length > 1) {

return Environment.getExternalStorageDirectory() + "/" + split[1] + "/";

} else {

return Environment.getExternalStorageDirectory() + "/";

}

// This is for checking SD Card

} else {

return "storage" + "/" + docId.replace(":", "/");

}

}

}

return null;

}

You can check each part of Uri using println. Returned values for my SD card and device main memory are listed below. You can access and delete if file is on memory, but I wasn't able to delete file from SD card using this method, only read or opened image using this absolute path. If you find a solution to delete using this method, please share.

SD CARD

getPath() uri: content://com.android.externalstorage.documents/tree/612E-B7BF%3A/document/612E-B7BF%3A

getPath() uri authority: com.android.externalstorage.documents

getPath() uri path: /tree/612E-B7BF:/document/612E-B7BF:

getPath() docId: 612E-B7BF:, split: 1, type: 612E-B7BF

MAIN MEMORY

getPath() uri: content://com.android.externalstorage.documents/tree/primary%3A/document/primary%3A

getPath() uri authority: com.android.externalstorage.documents

getPath() uri path: /tree/primary:/document/primary:

getPath() docId: primary:, split: 1, type: primary

If you wish to get Uri with file:/// after getting path use

DocumentFile documentFile = DocumentFile.fromFile(new File(path));

documentFile.getUri() // will return a Uri with file Uri