import java.util.Locale;
public class DownloadFileDialog extends AppCompatDialogFragment {
+ // `downloadFileListener` is used in `onAttach()` and `onCreateDialog()`.
+ private DownloadFileListener downloadFileListener;
- private String downloadUrl;
- private String downloadFileName;
- private String fileSize;
+ // The public interface is used to send information back to the parent activity.
+ public interface DownloadFileListener {
+ void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl);
+ }
+
+ @Override
+ public void onAttach(Context context) {
+ // Run the default commands.
+ super.onAttach(context);
+
+ // Get a handle for `DownloadFileListener` from the launching context.
+ downloadFileListener = (DownloadFileListener) context;
+ }
public static DownloadFileDialog fromUrl(String urlString, String contentDisposition, long contentLength) {
// Create an arguments bundle.
}
@Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
-
+ @NonNull
+ // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
+ @SuppressLint("InflateParams")
+ public Dialog onCreateDialog(Bundle savedInstanceState) {
// Remove the warning below that `getArguments()` might be null.
assert getArguments() != null;
- // Store the strings in the local class variables.
- downloadUrl = getArguments().getString("URL");
- downloadFileName = getArguments().getString("File_Name");
-
- // Get the `File_Size`.
+ // Store the variables from the bundle.
+ String downloadUrl = getArguments().getString("URL");
+ String downloadFileName = getArguments().getString("File_Name");
long fileSizeLong = getArguments().getLong("File_Size");
+ // Initialize the file size string.
+ String fileSize;
+
// Convert `fileSizeLong` to a String.
if (fileSizeLong == -1) { // We don't know the file size.
fileSize = getString(R.string.unknown_size);
} else { // Convert `fileSize` to MB and store it in `fileSizeString`. `%.3g` displays the three most significant digits.
fileSize = String.format(Locale.getDefault(), "%.3g", (float) fileSizeLong / 1048576) + " MB";
}
- }
-
- // The public interface is used to send information back to the parent activity.
- public interface DownloadFileListener {
- void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl);
- }
-
- // `downloadFileListener` is used in `onAttach()` and `onCreateDialog()`.
- private DownloadFileListener downloadFileListener;
-
- @Override
- public void onAttach(Context context) {
- super.onAttach(context);
-
- // Check to make sure the parent activity implements the listener.
- try {
- downloadFileListener = (DownloadFileListener) context;
- } catch (ClassCastException exception) {
- throw new ClassCastException(context.toString() + " must implement DownloadFileListener.");
- }
- }
- @Override
- @NonNull
- // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
- @SuppressLint("InflateParams")
- public Dialog onCreateDialog(Bundle savedInstanceState) {
// Remove the warning below that `getActivity()` might be null;
assert getActivity() != null;
// Get the activity's layout inflater.
LayoutInflater layoutInflater = getActivity().getLayoutInflater();
- // Use `AlertDialog.Builder` to create the `AlertDialog`.
+ // Use an alert dialog builder to create the alert dialog.
AlertDialog.Builder dialogBuilder;
// Set the style according to the theme.
// Set the view. The parent view is `null` because it will be assigned by `AlertDialog`.
dialogBuilder.setView(layoutInflater.inflate(R.layout.download_file_dialog, null));
- // Set an `onClick()` listener on the negative button.
+ // Set an listener on the negative button.
dialogBuilder.setNegativeButton(R.string.cancel, (DialogInterface dialog, int which) -> {
// Do nothing if `Cancel` is clicked. The `Dialog` will automatically close.
});
- // Set an `onClick()` listener on the positive button
+ // Set an listener on the positive button
dialogBuilder.setPositiveButton(R.string.download, (DialogInterface dialog, int which) -> {
// trigger `onDownloadFile()` and return the `DialogFragment` and the download URL to the parent activity.
downloadFileListener.onDownloadFile(DownloadFileDialog.this, downloadUrl);
});
- // Create an `AlertDialog` from the `AlertDialog.Builder`.
+ // Create an alert dialog from the alert dialog builder`.
final AlertDialog alertDialog = dialogBuilder.create();
- // Remove the warning below that `setSoftInputMode` might produce `java.lang.NullPointerException`.
+ // Remove the warning below that `getWindow()` might be null.
assert alertDialog.getWindow() != null;
- // Show the keyboard when `alertDialog` is displayed on the screen.
+ // Disable screenshots if not allowed.
+ if (!MainWebViewActivity.allowScreenshots) {
+ alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
+ }
+
+ // Show the keyboard when alert dialog is displayed on the screen.
alertDialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
// We need to show `alertDialog` before we can modify the contents.