How can I recursively scan directories in Android and display file name(s)? I'm trying to scan, but it's slow (force close or wait). I'm using the FileWalker
class given in a separate answer to this question.
You should almost always access the file system only from a non-UI thread. Otherwise you risk blocking the UI thread for long periods and getting an ANR. Run the FileWalker in an AsyncTask
's doInBackground()
.
This is a slightly optimized version of FileWalker:
public class Filewalker {
public void walk(File root) {
File[] list = root.listFiles();
for (File f : list) {
if (f.isDirectory()) {
Log.d("", "Dir: " + f.getAbsoluteFile());
walk(f);
}
else {
Log.d("", "File: " + f.getAbsoluteFile());
}
}
}
}
You can invoke it from a background thread like this:
Filewalker fw = new Filewalker();
fw.walk(context.getFilesDir());