如何在android中创建自定义对话框并接收结果？

Question

我有一个活动，当用户单击按钮时，会打开一个对话框。在此对话框中有一个微调器，有 3 个选项：蓝色、红色、绿色。并且有一个提交按钮。我希望当用户选择一种颜色并单击提交时，在调用者活动中，其String color 设置为对话框中的选定颜色。我试试这个：但没有奏效。请帮帮我....

String color;
String dialogColor;

showDialog.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            final Dialog dialog = new Dialog(context);
            dialog.setContentView(R.layout.custom_dialog);
            dialog.setTitle("my dialog");

            Spinner spinner = (Spinner) dialog.findViewById(R.id.spinner);

            final TextView status = (TextView) dialog.findViewById(R.id.status);
            Button submit = (Button) dialog.findViewById(R.id.submit);


            spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                @Override
                public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                    dialogColor = parent.getItemAtPosition(position).toString();
                    status.setText("Color is: "+dialogColor);
                    color = dialogColor;
                }

                @Override
                public void onNothingSelected(AdapterView<?> parent) {

                }
            });


        submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.putExtra("Color",dialogColor);

                dialog.dismiss();
            }
        });

            dialog.show();


        }
    });

我使用直接和有意的方式将我的颜色字符串分配给选定的值。但没有奏效。我哪里错了？

Answer 1

我认为现在创建自定义对话框的最佳方式是Dialog Fragment，因为它的简单对话框是有限的。例如，这是创建dialogs with material design 的方法。你有不同的方式从对话片段中获取信息，例如the first 和the second。

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这是创建对话框片段的基本代码：

//Method to call and start dialog fragment class
public void ShowPhotoFilesDialog(Activity context,File photo){
    //Declaration of classes
    Custom_DialogFragment custom_dialogFragment = new Custom_DialogFragment ();

    FragmentManager fragmentManager = context.getFragmentManager();

    // The device is using a large layout, so show the fragment as a dialog
    custom_dialogFragment.show(fragmentManager, "dialog");
}

这是基本的对话框片段类：

public class Custom_DialogFragment extends DialogFragment {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    try {
        // The only reason you might override this method when using onCreateView() is
        // to modify any dialog characteristics. For example, the dialog includes a
        // title by default, but your custom layout might not need it. So here you can
        // remove the dialog title, but you must call the superclass to get the Dialog.
        Dialog dialog = super.onCreateDialog(savedInstanceState);
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        //To hide action bar from layout
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);

        //Declaration of controls
        View v = getActivity().getLayoutInflater().inflate(R.layout.my_custom_layout);
        builder.setView(v);

        //My code

        return builder.create();
    }
    catch (Exception ex){
        Log.e("-- Custom_DialogFragment.onCreateDialog --","",ex);
        return null;
    }
}
}

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如果我帮助了你，请告诉我，编程很好！