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show()我正在尝试创建一个片段，当显示时，它会根据我传递给该方法的额外项目来更改其内容。对话框片段实例是为了可重用性而保留的，换句话说，我只需将片段实例化一次，并show()在我希望显示它时使用它显示的新对象进行调用。它在第一次显示时工作正常，但对于随后的显示调用，我无法更改编辑文本的文本。你会在下面的课程中看到，我实际上已经明确地在show()代码块之后将文本更改为“我被改变了”，但这从未反映在 ui 中。

public class RegisterFragment extends DialogFragment implements View.OnClickListener, DialogInterface.OnClickListener
    {
    private static final String KEY_SOURCE = "source";
    private static String source;
    private static JSONObject listEntry;
    private RegisterItem item;

    private boolean spinnerMode;
    private boolean viewsCreated;

    private TextView label1, label2;
    private EditText field1 = null, field2 = null;
    private Spinner spinner;
    private ArrayAdapter<String> adapter;
    private Button send, cancel;

    private OnClickSendCancelButtonListener sendListener;

    public static RegisterFragment newInstance(String source)
        {
        RegisterFragment fragment = new RegisterFragment();
        Bundle b = new Bundle();
        b.putString(KEY_SOURCE, source);
        fragment.setArguments(b);
        return fragment;
        }
    @Override
    public void onCreate(Bundle savedInstanceState)
        {
        super.onCreate(savedInstanceState);

        Bundle b = this.getArguments();
        if (b != null)
            {
            source = b.getString(KEY_SOURCE);
            load(source);
            }
        adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
        viewsCreated = false;
        }


    public RegisterItem getRegisterItem()
        {
        return this.item;   
        }


    @Override
    public void onAttach(Activity activity)
        {
        super.onAttach(activity);

        try
            {
            this.sendListener = (OnClickSendCancelButtonListener) activity;
            }
        catch (ClassCastException e)
            {
            throw new ClassCastException("Activity must implement RegisterFragment#OnClickSendCancelButtonListener");
            }
        }

    private void load(String source)
        {
        if (item == null)
            item = new RegisterItem();
        item.loadData(source);
        spinnerMode = item.hasChoices();

        if (!viewsCreated)
            return;

        label1.setText(item.field1Label);
        label2.setText(item.field2Label);

        send.setText(item.sendButtonText);
        cancel.setText(item.cancelButtonText);

        Log.v("RegisterFragment", "FIELD1: " + item.defaultField1);
        Log.v("RegisterFragment", "FIELD2: " + item.defaultField2);

        if (spinnerMode)
            {
            field1.setVisibility(View.GONE);
            spinner.setVisibility(View.VISIBLE);

            adapter.clear();
            for(String choice: item.choices)
                adapter.add(choice);
            adapter.notifyDataSetChanged();
            }
        else
            {
            field1.setVisibility(View.VISIBLE);
            spinner.setVisibility(View.GONE);
            }

        if (item.hasDefaults())
            {
            Log.v("RegisterFragment", "Setting text for field 2");
            field2.setText(item.defaultField2);
            Log.v("RegisterFragment", "FIELD2 TEXT: " + field2.getText().toString());
            if (spinnerMode)
                spinner.setSelection(adapter.getPosition(item.defaultField2));
            else
                field1.setText(item.defaultField1);
            }
        }

    public void show(FragmentManager manager, String tag, String source, String listEntry)
        {
        Log.v("Register Fragment", "Showing fragment\nSOURCE STRING: " + source);
        load(source);
        RegisterFragment.source = source;
        try {
            RegisterFragment.listEntry = new JSONObject(listEntry);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        super.show(manager, tag);
        if (field2 != null)
            field2.setText("I Have Been Changed");
        }


    @Override
    public void dismiss()
        {
        if (field1 != null)
            field1.setText("");
        if (field2 != null)
            field2.setText("");
        super.dismiss();
        }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {
        View v = inflater.inflate(R.layout.register_screen, null);

        spinner = (Spinner) v.findViewById(R.id.register_spinner);
        spinner.setAdapter(adapter);

        label1 = (TextView) v.findViewById(R.id.register_label1);
        label2 = (TextView) v.findViewById(R.id.register_label2);

        field1 = (EditText) v.findViewById(R.id.register_field1);
        field2 = (EditText) v.findViewById(R.id.register_field2);

        send = (Button) v.findViewById(R.id.register_send);
        cancel = (Button) v.findViewById(R.id.register_cancel);

        send.setOnClickListener(this);
        cancel.setOnClickListener(this);

        viewsCreated = true;
        load(source);

        return v;
        }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        viewsCreated = false;
    }
    }
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1 回答 1

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您的代码应该可以工作。但一定要试试这个。

EditText text = (EditText)getDialog().findViewById(R.id.register_field2);
text.setText("I have been changed");
于 2012-08-31T07:06:40.350 回答