Android弹出dialog后无法捕捉back键的解决方法

private void createDialog() {  AlertDialog.Builder builder = new AlertDialog.Builder(this);  builder.setTitle(getString(R.string.acq_select_hint));  builder.setPositiveButton(getString(R.string.dialog_cancel), (dialog, which) -> onCancelClicked(dialog));  builder.setCancelable(false);    builder.setOnKeyListener((dialog, keyCode, event) -> {    if (keyCode == KeyEvent.KEYCODE_BACK) {      onCancelClicked(dialog);    }    return false;  });  builder.create().show();}private void onCancelClicked(DialogInterface dialog) {  setResult(100);  finish();  dialog.dismiss();}