Question

我有一个Activity，必须显示带有ListView的AlertDialog，供用户选择其中一个选项。当我将AlertDialog的代码放在onCreate方法中时，它可以工作。但是在其他地方，它并没有。控制台上没有错误。

这就是它所在的地方（在活动中）：

@Override
public void onStateChanged(IntegratorState state) {
    switch (state.getState()) {
    case AWAITING_MENU_OPTION:
        IntegratorHelper.showOptionsMenu(state, SitefMenuActivity.this).show();
        break;
    default:
        Toast.makeText(getApplicationContext(), state.getState().name(),
                Toast.LENGTH_LONG).show();
    }
}

这是我创建Dialog的地方（在另一个类中）：

public static AlertDialog showOptionsMenu(IntegratorState state, Context context) {
    AlertDialog.Builder builder = new AlertDialog.Builder(context);
    builder.setTitle(state.getGatewayMessageExtra());
    String[] strings;
    strings = state.getGatewayMessage().split(";");

    final List<String> options = Arrays.asList(strings);

    builder.setAdapter(new MenuSaleAdapter(context,
            android.R.layout.simple_list_item_1, options),
            new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    if (which == options.size()-1) {
                        // Do a thing
                    } else {
                        // Do other thing
                    }
                }
            });
    return builder.create();
}

private static class MenuSaleAdapter extends ArrayAdapter<String> {

    public MenuSaleAdapter(Context context, int textViewResourceId,
            List<String> objects) {
        super(context, textViewResourceId, objects);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        TextView view = (TextView) super.getView(position, convertView,
                parent);
        view.setTextColor(Color.BLACK);
        return view;
    }
}

我试图将所有代码放在同一个Activity中，但它仍然无法正常工作。应用程序没有冻结或任何东西，它只是没有显示对话框。有任何想法吗？感谢

Answer 1

尝试将第一部分更改为：

    @Override
    public void onStateChanged(IntegratorState state) {
    switch (state.getState()) {
    case AWAITING_MENU_OPTION:
        IntegratorHelper.showOptionsMenu(state, SitefMenuActivity.this);
        break;
    default:
        Toast.makeText(getApplicationContext(), state.getState().name(),
                Toast.LENGTH_LONG).show();
    }
}

和第二部分：

public static void showOptionsMenu(IntegratorState state, Activity activity) {
    AlertDialog.Builder builder = new AlertDialog.Builder(activity);
    builder.setTitle(state.getGatewayMessageExtra());
    String[] strings;
    strings = state.getGatewayMessage().split(";");

    final List<String> options = Arrays.asList(strings);

    builder.setAdapter(new MenuSaleAdapter(activity,
            android.R.layout.simple_list_item_1, options),
            new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    if (which == options.size()-1) {
                        // Do a thing
                    } else {
                        // Do other thing
                    }
                }
            });
    builder.create().show();
}

不在onCreate时不显示AlertDialog

1 个答案: