import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors;

// Inside MainActivity.java

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);

Button downloadButton = findViewById(R.id.downloadButton);
downloadButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        // Move download task to background thread
        ExecutorService executor = Executors.newSingleThreadExecutor();
        executor.execute(new Runnable() {
            @Override
            public void run() {
                downloadFile("http://212.183.159.230/50MB.zip");
            }
        });
    }
});

}

private void downloadFile(String urlString) { try { URL url = new URL(urlString); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.connect();

    int responseCode = connection.getResponseCode();
    if (responseCode == HttpURLConnection.HTTP_OK) {
        String fileName = getFileNameFromURL(urlString);
        File directory = getExternalFilesDir(null);

        if (directory != null) {
            File file = new File(directory, fileName);

            // Log the file path
            Log.d(TAG, "Saving file to: " + file.getAbsolutePath());

            InputStream inputStream = connection.getInputStream();
            OutputStream outputStream = new FileOutputStream(file);

            byte[] buffer = new byte[1024];
            int bytesRead;
            while ((bytesRead = inputStream.read(buffer)) != -1) {
                outputStream.write(buffer, 0, bytesRead);
            }

            outputStream.flush();
            outputStream.close();
            inputStream.close();

            // Update UI on the main thread after successful download
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(MainActivity.this, "File downloaded: " + file.getAbsolutePath(), Toast.LENGTH_LONG).show();
                }
            });
        } else {
            Log.e(TAG, "Failed to get external files directory");
        }
    } else {
        Log.e(TAG, "Server returned HTTP error code: " + responseCode);
    }

} catch (Exception e) {
    Log.e(TAG, "Error downloading file: ", e);
    // Update UI on the main thread in case of failure
    runOnUiThread(new Runnable() {
        @Override
        public void run() {
            Toast.makeText(MainActivity.this, "Failed to download file: " + e.getClass().getSimpleName(), Toast.LENGTH_SHORT).show();
        }
    });
}

}