+ @Override
+ public void onSaveWebpageImage(DialogFragment dialogFragment) {
+ // Get a handle for the file name edit text.
+ EditText fileNameEditText = dialogFragment.getDialog().findViewById(R.id.file_name_edittext);
+
+ // Get the file path string.
+ saveWebsiteImageFilePath = fileNameEditText.getText().toString();
+
+ // Check to see if the storage permission is needed.
+ if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) { // The storage permission has been granted.
+ // Save the webpage image.
+ new SaveWebpageImage(this, currentWebView).execute(saveWebsiteImageFilePath);
+ } else { // The storage permission has not been granted.
+ // Get the external private directory `File`.
+ File externalPrivateDirectoryFile = getExternalFilesDir(null);
+
+ // Remove the incorrect lint error below that the file might be null.
+ assert externalPrivateDirectoryFile != null;
+
+ // Get the external private directory string.
+ String externalPrivateDirectory = externalPrivateDirectoryFile.toString();
+
+ // Check to see if the file path is in the external private directory.
+ if (saveWebsiteImageFilePath.startsWith(externalPrivateDirectory)) { // The file path is in the external private directory.
+ // Save the webpage image.
+ new SaveWebpageImage(this, currentWebView).execute(saveWebsiteImageFilePath);
+ } else { // The file path is in a public directory.
+ // Check if the user has previously denied the storage permission.
+ if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) { // Show a dialog explaining the request first.
+ // Instantiate the storage permission alert dialog.
+ DialogFragment storagePermissionDialogFragment = new StoragePermissionDialog();
+
+ // Show the storage permission alert dialog. The permission will be requested when the dialog is closed.
+ storagePermissionDialogFragment.show(getSupportFragmentManager(), getString(R.string.storage_permission));
+ } else { // Show the permission request directly.
+ // Request the write external storage permission. The webpage image will be saved when it finishes.
+ ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, SAVE_WEBPAGE_IMAGE_REQUEST_CODE);
+ }
+ }
+ }
+ }
+
+ @Override
+ public void onCloseStoragePermissionDialog() {
+ // Request the write external storage permission. The webpage image will be saved when it finishes.
+ ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, SAVE_WEBPAGE_IMAGE_REQUEST_CODE);
+ }
+