Question

我正在尝试从嵌套的alertdialog获取文本输入。为什么字符串Res1始终为null？从下面的Logcat中，我认为我需要一个ViewGroup，但是如何/在哪里更改代码，以使Alertdialogs完全完成后能够读取两个EditText？这两个EditText都在custom.dialog.xml中定义。

也许有更好的方法可以做到这一点-我本质上是在尝试使用Alertdialog来获取用户对2个后备问题的输入。我认为Android Nested dialog - Specified child already has a parent接近吗？

    AlertDialog.Builder ad1 = new AlertDialog.Builder(this);
    LayoutInflater inflater = this.getLayoutInflater();
    View dv1 = inflater.inflate(R.layout.custom_dialog, null);
    ad1.setView(dv1);
    EditText edTitle = (EditText) dv1.findViewById(R.id.edTitle);
    ad1.setTitle("New Title");
    ad1.setMessage("Enter text below");

    ad1.setPositiveButton("Add", new DialogInterface.OnClickListener() {

        public void onClick(DialogInterface dialog, int whichButton) {

            AlertDialog.Builder ad2 = new AlertDialog.Builder(MainActivity.this);
            LayoutInflater inflater2 = MainActivity.this.getLayoutInflater();
            View dv2 = inflater2.inflate(R.layout.custom_dialog, null);
            ad2.setView(dv2);
            EditText edText = (EditText) dv2.findViewById(R.id.edText);
            ad2.setTitle("New Text:");
            ad2.setMessage("Enter text below")

            ad2.setPositiveButton("Done", new DialogInterface.OnClickListener() {

                public void onClick(DialogInterface dialog, int whichButton) {
                    String Res1 = edText.getText().toString();
                    String Res2 = edTitle.getText().toString();
                }
            });
            ad2.setNegativeButton(sCancel, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            });
            dialog.dismiss();
            AlertDialog adText = ad2.create();
            adText.show();
        }
    });
    ad1.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            dialog.dismiss();
        }
    });

    AlertDialog adTitle = ad1.create();
    adTitle.show();

和Logcat：

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.dhj.tt_V2, PID: 20303
java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference
at com.example.dhj.tt_V2.MainActivity$2.onClick(MainActivity.java:374)

带有两个EditText的嵌套Alertdialog

0 个答案: