public static void openFile(String filePath) {
File file = new File(filePath);
String extension = "";
int i = filePath.lastIndexOf('.');
int p = Math.max(filePath.lastIndexOf('/'), filePath.lastIndexOf('\\'));
if (i > p) extension = filePath.substring(i + 1);
String type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension.toLowerCase());
if (type == null) type = "*/*";
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), type);
instance.startActivity(intent);
}
public static void shareLink(String link) {
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("text/plain");
share.putExtra(Intent.EXTRA_TEXT, link);
instance.startActivity(Intent.createChooser(share, ""));
}