alertDialog.setOnKeyListener(new DialogInterface.OnKeyListener() {

@Override

public boolean onKey(DialogInterface dialog, int keyCode,KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_SEARCH) {

return true;

} else {

return false; // 默认返回 false

}

}

});

alertDialog.show();

Android中AlertDialog对话框禁止按[返回键]或[搜索键]