Android的 - 构造函数是未定义错误 [英] Android - The constructor is undefined error

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问题描述

我要在片段的活动数据传递给另一个类。但,
它使一个错误,构造意图(新View.OnClickListener(){},类)是不确定的。

本code

 '意向意图=新意图(这一点,WebSocket_Connector.class);'

下面是code..how我可以通过ID的字符串值?

 公共类Myoffers_Fragment扩展片段{    私人最终WebSocketConnection mConnection =新WebSocketConnection();    公共静态的newInstance片段(Myoffers背景下,INT POS,浮动比例)
    {
        束B =新包();
        b.putInt(POS,POS机);
        b.putFloat(规模化,规模);
        返回Fragment.instantiate(上下文,Myoffers_Fragment.class.getName(),二);
    }    @覆盖
    公共查看onCreateView(LayoutInflater充气器,容器的ViewGroup,
            捆绑savedInstanceState){
        如果(集装箱== NULL){
            返回null;
        }        的LinearLayout L =(的LinearLayout)inflater.inflate(R.layout.mf,集装箱,FALSE);        INT POS = this.getArguments()调用getInt(POS)。
        TextView的电视=(TextView中)l.findViewById(R.id.text);
        tv.setText(产品+ POS)        的ImageButton product_photo =(的ImageButton)l.findViewById(R.id.myoffer_image);
        如果(POS == 0){
            product_photo.setImageResource(R.drawable.myoffers_0);
            product_photo.setOnClickListener(新ImageButton.OnClickListener(){
                公共无效的onClick(视图v){
                    字符串ID1 =Product0;
                    意向意图=新意图(这一点,WebSocket_Connector.class);
                    intent.putExtra(KeyToAccessDataID1);
                    startActivity(意向);
                    Log.d(TAG,目前的产品是:+ ID1);
                    Log.d(TAG,ID1 +被发送到服务器!);
                }
            });
        }


解决方案

的意图constrcutor之一,需要一个放慢参数上下文的.class 对象。所以,你的这个必须有一个有效的上下文或活动。从文档:

参数


  1. packageContext 实施这一类的应用程序包的上下文。

  2. CLS 的组件类是用于意图。

修改

 新意图(这一点,WebSocket_Connector.class);

 新意图(getActivity(),WebSocket_Connector.class);

I want to pass data in fragment activity to another class. But, it makes an error that "The constructor Intent(new View.OnClickListener(){}, Class) is undefined".

with this code

'Intent intent = new Intent(this, WebSocket_Connector.class);'

Here is the code..how can I pass the 'id' string value?

public class Myoffers_Fragment extends Fragment {

    private final WebSocketConnection mConnection = new WebSocketConnection();

    public static Fragment newInstance(Myoffers context, int pos, float scale)
    {
        Bundle b = new Bundle();
        b.putInt("pos", pos);
        b.putFloat("scale", scale);
        return Fragment.instantiate(context, Myoffers_Fragment.class.getName(), b);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        if (container == null) {
            return null;
        }

        LinearLayout l = (LinearLayout) inflater.inflate(R.layout.mf, container, false);

        int pos = this.getArguments().getInt("pos");
        TextView tv = (TextView) l.findViewById(R.id.text);
        tv.setText("Product " + pos);



        ImageButton product_photo = (ImageButton) l.findViewById(R.id.myoffer_image);


        if (pos == 0) {
            product_photo.setImageResource(R.drawable.myoffers_0);
            product_photo.setOnClickListener(new ImageButton.OnClickListener(){
                public void onClick(View v){
                    String id1 = "Product0";
                    Intent intent = new Intent(this, WebSocket_Connector.class);
                    intent.putExtra("KeyToAccessData", id1);
                    startActivity(intent);
                    Log.d(TAG, "Current product is : " + id1);
                    Log.d(TAG, id1 + "is sent to server!");
                }
            });
        }

解决方案

one of the Intent constrcutor takes a paramter a Context and a .class object. So your this has to be a valid context or an Activity. From the documentation:

Parameters

  1. packageContext A Context of the application package implementing this class.
  2. cls The component class that is to be used for the intent.

Change

new Intent(this, WebSocket_Connector.class); 

with

new Intent(getActivity(), WebSocket_Connector.class);

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