Question

I am working on a task to read SD card files and I am showing a progress bar with calculated percentage based on SD card files like some antivirus software in Android. I don’t know how to implement this functionality. My SD card read files code shown below:

File root = new File (Environment.getExternalStorageDirectory().getAbsolutePath());
scan(root);

Scan function code shown below:

   public void scan (File path) {

            for (File f : path.listFiles()) {
                if (f.isFile()) {
                   Toast.makeText(getApplicationContext(),f.getAbsoluteFile().toString(),Toast.LENGTH_SHORT).show();
                }
                else {

                }
            }
        }

Can you show me how to do this?

Answer 1

I guess that a file list has a length. You can use this length in your loop to compute a percentage of number of files completed so far. Perhaps something like:

File[] files = path.listFiles();
for (i=0; i<files.length; i++) {
    // Report i / files.length percent done
}