Question

需要帮助，我一直在尝试寻找一种方法，以便可以将数据从kotlin传递到DialogFragment的newInstance。下面的kotlin代码

private var messageDialog: MessageDialog? = null

override fun onLoginFail(value: String?) {
    //TODO:find hpw to implement this
    messageDialog = MessageDialog.newInstance(getString(R.string.sign_title),getString(R.string.signin_msg,value)
    messageDialog?.show(supportFragmentManager,null)
}

下面的对话框片段

public static MessageDialog newInstance(String title, String msg){
    Bundle args = new Bundle();
    args.putString(EXTRA_MSG,msg);
    args.putString(EXTRA_TITLE,title);
    MessageDialog messageDialog = new MessageDialog();
    messageDialog.setArguments(args);
    return messageDialog;
}

Answer 1

在kotlin中，我们使用伴随对象来制作静态方法，这是您可以根据需要执行的操作：

在消息对话框中：

 companion object {
    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @return A new instance of fragment Message Dialog Fragment.
     */
    @JvmStatic
    fun newInstance(title: String, msg: String) = MessageDialog().apply {
        arguments = Bundle().apply {
            putString(EXTRA_TITLE, tile) 
            putString(EXTRA_MSG, msg)
        }
    }
}

在消息对话框片段中，onCreate方法：

var title =""
var msg = ""

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    arguments?.let {
        title= it.getString(EXTRA_TITLE)
        msg = it.getString(EXTRA_MSG)
    }

}

现在您可以致电MessageDialog.newInstance("Sample title","Sample msg")

将数据从Kotlin活动传递到Java DialogFragment

1 个答案: