import android.annotation.SuppressLint;
import android.app.Dialog;
-import android.app.DialogFragment;
import android.content.Context;
import android.content.DialogInterface;
import android.net.Uri;
import android.os.Bundle;
+import android.support.annotation.NonNull;
// `android.support.v7.app.AlertDialog` uses more of the horizontal screen real estate versus `android.app.AlertDialog's` smaller width.
import android.support.v7.app.AlertDialog;
+// We have to use `AppCompatDialogFragment` instead of `DialogFragment` or an error is produced on API <=22.
+import android.support.v7.app.AppCompatDialogFragment;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import java.util.Locale;
-public class DownloadFile extends DialogFragment {
+public class DownloadFile extends AppCompatDialogFragment {
private String downloadUrl;
private String downloadFileName;
Bundle argumentsBundle = new Bundle();
String fileNameString;
- if (!contentDisposition.isEmpty()) { // Extract `fileNameString` from `contentDisposition` using the substring beginning after `filename="` and ending with the next `"`.
+
+ // Parse `filename` from `contentDisposition`.
+ if (contentDisposition.contains("filename=\"")) { // The file name is contained in a string surrounded by `""`.
fileNameString = contentDisposition.substring(contentDisposition.indexOf("filename=\"") + 10, contentDisposition.indexOf("\"", contentDisposition.indexOf("filename=\"") + 10));
- } else { // `contentDisposition` is empty, so use the last path segment of the URL as the file name.
+ } else if (contentDisposition.contains("filename=") && ((contentDisposition.indexOf(";", contentDisposition.indexOf("filename=") + 9)) > 0 )) { // The file name is contained in a string beginning with `filename=` and ending with `;`.
+ fileNameString = contentDisposition.substring(contentDisposition.indexOf("filename=") + 9, contentDisposition.indexOf(";", contentDisposition.indexOf("filename=") + 9));
+ } else if (contentDisposition.contains("filename=")) { // The file name is contained in a string beginning with `filename=` and proceeding to the end of `contentDisposition`.
+ fileNameString = contentDisposition.substring(contentDisposition.indexOf("filename=") + 9, contentDisposition.length());
+ } else { // `contentDisposition` does not contain the filename, so use the last path segment of the URL.
Uri downloadUri = Uri.parse(urlString);
fileNameString = downloadUri.getLastPathSegment();
}
// The public interface is used to send information back to the parent activity.
public interface DownloadFileListener {
- void onDownloadFile(DialogFragment dialogFragment, String downloadUrl);
+ void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl);
}
// `downloadFileListener` is used in `onAttach()` and `onCreateDialog()`.
// `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
@SuppressLint("InflateParams")
@Override
+ @NonNull
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Get the activity's layout inflater.
LayoutInflater layoutInflater = getActivity().getLayoutInflater();