ExportImportDialog.java 文件源码

/**
 * Gets the activity reference type cast to support the required interfaces and base classes
 * for export/import operations.
 *
 * @return The attached activity, or {@code null} if no activity is attached.
 */
private <A extends AppCompatActivity & FileChooserDialog.FileCallback & ExportImportCallbacks>
A getExImActivity() {
    //noinspection unchecked
    return (A) getActivity();
}