Question

我正在调用一个带有以下参数的对话框：

MyDialog("title", "message").show(this@MyActivity.supportFragmentManager, null)

这是我的对话框类：

class MyDialog(private val theTitle: String, private val theMessage: String) : DialogFragment() {
    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        return activity.let {
            val myBuilder = AlertDialog.Builder(it)
            myBuilder
                .setTitle(theTitle)
                .setMessage(theMessage)
                .setPositiveButton("OK") { _, _ -> }
            myBuilder.create()
        }
    }
}

但是，当设备的方向随着旋转而改变时，该应用将停止工作。如果不传递任何参数，则不会发生这种情况。那么，如何传递参数以及这样做的最佳方法是什么？

Answer 1

如果它是一个片段，则应该始终有一个默认的构造函数。单独传递参数将确保在片段的状态更改之间保留参数。
因此，有一个方法setArgument（Bundle）可在其中传递参数。因此，此处的通话应改写为

class MyDialog: DialogFragment() {
    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        return activity.let {
             val arg = arguments
            // Use the parameters by accessing the key from variable "arg"
            val myBuilder = AlertDialog.Builder(it)
            myBuilder
                .setTitle(theTitle)
                .setMessage(theMessage)
                .setPositiveButton("OK") { _, _ -> }
            myBuilder.create()
        }
    }
}

您这样称呼Dialog：

val d = MyDialog()
val b = Bundle()
b.putInt("KEY1",1)
d.arguments = b
d.show(FragmentManager,Tag)

对于任何片段，请始终记住使用参数来传递数据

Answer 2

使用Kotlin的完整解决方案

第1步。按照以下步骤创建课程

class MyDialog : DialogFragment() {

    private var title: String? = null
    private var message: String? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        arguments?.let {
            title = it.getString(ARG_TITLE)
            message = it.getString(ARG_MESSAGE)
        }
    }

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        return activity.let {
            val myBuilder = AlertDialog.Builder(it)
                myBuilder
                    .setTitle(title)
                    .setMessage(message)
                    .setPositiveButton("OK") { _, _ -> }
            myBuilder.create()
        }
    }

    companion object {
        const val TAG = "myDialog"
        private const val ARG_TITLE = "argTitle"
        private const val ARG_MESSAGE = "argMessage"

        fun newInstance(title: String, message: String) = MyDialog().apply {
            arguments = Bundle().apply {
                putString(ARG_TITLE, title)
                putString(ARG_MESSAGE, message)
            }
        }
    }
}

第2步。创建实例并显示它

MyDialog.newInstance("title", "message").show(this@MyActivity.supportFragmentManager, MyDialog.TAG)

全部！

Answer 3

尝试此代码，并在我传递消息时传递任何数据作为参数...

    private void confirmdialog(String msg_str) {

    final Dialog dialog = new Dialog(this);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    dialog.setCancelable(false);
    dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);
    LayoutInflater li = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View v1 = li.inflate(R.layout.dialog_forsurity, null, false);
    dialog.setContentView(v1);
    dialog.setCancelable(true);


    TextView msg = (TextView) v1.findViewById(R.id.msg);
    msg.setText(msg_str);

    Button btn_submit = (Button) v1.findViewById(R.id.btn_submit);


    btn_submit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            dialog.dismiss();

            Intent intent = new Intent(SellNumberPlateActivity.this, HomeActivity.class);
            startActivity(intent);
            finishAffinity();

        }
    });

    dialog.show();
    Window window = dialog.getWindow();
    window.setLayout(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);

}

R.layout.dialog_forsurity是您对话框的设计...

Answer 4

之所以要通过bundle传递参数，是因为当系统还原片段（例如，更改配置）时，它将自动还原您的bundle。

来源：https://stackoverflow.com/a/16042750/619673

代替创建DialogFragment-您应该通过从其类中调用静态方法来实例化：

public static MyDialog newInstance(String param1) {
    MyDialog d = new MyDialog ();

    Bundle args = new Bundle();
    args.putString("param1", param1);
    d.setArguments(args);

    return d;
}

当您想显示它时，请致电：

MyDialog dialog = MyDialog .newInstance("lorem ipsum");
dialog.show(fm, "fragment_confirm_dialog");

来源：https://stackoverflow.com/a/15463986/619673

如何在Android中将参数传递给对话框？

4 个答案: