CODEWITHSUNDEEP
androidfile-uploadusbmtp
andreas
andreas

Reputation: 1585

File exchange PC <--> Android via USB MTP issues

In my android app, I create a file and write some test text into it:

File externalPath = getExternalFilesDir(null);
File importPath = new File(externalPath, "pd-import");
if(!importPath.exists()) {
    Log.d(this.getClass().getSimpleName(), "Create import dir: " + importPath.getAbsolutePath());
    importPath.mkdirs();
}

File readme = new File(importPath, "README.txt");
try {
    FileWriter fw = new FileWriter(readme);
    fw.write("This is a test");
    fw.flush();
    fw.close();
} catch (IOException e) {
    e.printStackTrace();
}

This writes the file, which can be approved with an android file browser like B1 File Manager. It's written to HOME/Android/data/JAVA_PACKAGE_NAME/files/pd-import/README.txt Screenshot with Folder

The logcat shows me: D/MainActivity﹕ Create import dir: /storage/emulated/0/Android/data/JAVA_PACKAGE_NAME/files/pd-import

When I connect my Nexus, where I tested the code, to my Ubuntu Laptop via USB, I see all the other applications data directories like NEXUS 5/Interner Speicher/Android/data/ALL_THE_OTHER_JAVA_PACKAGE_NAMEs ("Interner Speicher" stands for: internal memory). But the folder is not listed for my app is not listed.

Screenshot without the folder

Do I need to set some additional medatdata/information/whatever, to have the folder listed over the MTP connection? Anny suggestions?

Upvotes: 3

Views: 948

Answers (1)

ToYonos
ToYonos

Reputation: 16833

Does the directory appear when the device is rebooted ? If yes, I think this bug is the cause : https://code.google.com/p/android/issues/detail?id=38282

All phones using MTP instead of USB Mass storage do not properly show the list of files when that phone is connected to a computer using a USB cable. Android apps running on the device also cannot see these files.

This affects files written using Java APIs, but does not appear to affect files written using the C API.

The solution is to reboot the device.

It does not seem to be resolved.

Upvotes: 1

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