java - Android - 无法从自定义对话框中的 EditText 获取价值

Question

我未能从自定义对话框中的 EditText 对象获取输入。

 public class SetCityDialog extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        LayoutInflater factory = LayoutInflater.from(MainActivity.this);
        final View view = factory.inflate(R.layout.city_dialog, null);


        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

        // Get the layout inflater
        LayoutInflater inflater = getActivity().getLayoutInflater();
        builder.setView(inflater.inflate(R.layout.city_dialog, null))
                // Add action buttons
                .setPositiveButton("OK",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog,
                                    int id) {

                                //This is the input I can't get text from
                                EditText inputTemp = (EditText) view.findViewById(R.id.search_input_text);
                                //query is of the String type
                                query = inputTemp.getText().toString();
                                newQuery();
                                getJSON newData = new getJSON();
                                newData.execute("Test");
                            }
                        })
                .setNegativeButton("Cancel",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog,
                                    int id) {
                                SetCityDialog.this.getDialog().cancel();
                            }
                        });
        return builder.create();
    }
}

我没有得到任何异常，但变量查询设置为空字符串。任何帮助都会很棒。

Answer 1

我试图做同样的事情，但我得到了同样的错误。我不知道为什么。我过去已经使用过 AlertDialog.Builder 并且没有遇到任何问题。但在您的情况下更改此代码：

public void onClick(DialogInterface dialog,
                                int id) {

                            //This is the input I can't get text from
                            EditText inputTemp = (EditText) view.findViewById(R.id.search_input_text);
                            //query is of the String type
                            query = inputTemp.getText().toString();
                            newQuery();
                            getJSON newData = new getJSON();
                            newData.execute("Test");
                        }

通过这个：

public void onClick(DialogInterface dialog,
                                int id) {
                            Dialog f = (Dialog) dialog;
                            //This is the input I can't get text from
                            EditText inputTemp = (EditText) f.findViewById(R.id.search_input_text);
                            query = inputTemp.getText().toString();
                           ...
                        }

这个解决方案对我有用，对你来说似乎也是一样的。在stackoverflow上找到

Answer 2

改用这个：

View myLayout = nflater.inflate(R.layout.city_dialog, null);
EditText myEditText = (EditText) myLayout.findViewById(R.id.myEditText);
String valueOfEditText = myEditText.getText().toString();

Answer 3

This is worked for me: 

// if button is clicked, close the custom dialog
        dialogButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {

                try {

                    Dialog inDialog = (Dialog) dialog;                    

                    EditText emailAddress = (EditText) inDialog.findViewById(R.id.emailAddress);
                    email = emailAddress.getText().toString();

                    if(email.length() == 0) {

                        objPublicDelegate.showToast("Please fill Email Address.");

                    }else{

                        objLoadingDialog.show("Please wait...");

                        // Call a network thread Async task 
                        mNetworkMaster.runForgetAsync(email);

                    }

                } catch (Exception e) {
                    e.printStackTrace();
                }


            }
        });

Answer 4

不需要做那么多编码。只是改变

    builder.setView(inflater.inflate(R.layout.city_dialog, null))

至

    builder.setView(view)

并使用 **view.findView 访问 EditText 的文本.....

    EditText inputTemp = (EditText) view.findViewById(R.id.search_input_text);
    String xyz = inputTemp.getText().toString();