我想在 Array Adapter 中打开新的 activity 告诉我它是如何实现的

Question

这是我正在运行的代码，但 startActivity 函数在这里不起作用，点击监听器正在运行。请帮我看看这怎么可能。

这是我的主线程代码：

restaurant_Array_list = new ArrayList<home_listview_model>();
        new get_restaurant_data().execute("http://unstoppable.io/food/androidApi");

        ListView listview = (ListView)findViewById(R.id.home_list);
        home_listadapter = new home_listadapter(getApplicationContext(), R.layout.home_list_view, restaurant_Array_list);

        listview.setAdapter(home_listadapter);

        listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int position,long id) {
                Toast.makeText(getApplicationContext(), restaurant_Array_list.get(position).getRestaurant_name(), Toast.LENGTH_LONG).show();
            }
        });

这是 AsyncTask 代码：

public class get_restaurant_data extends AsyncTask<String, Void, Boolean> {


    ProgressDialog dialog;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        dialog = new ProgressDialog(home.this);
        dialog.setMessage("Loading... please wait");
        dialog.show();
        dialog.setCancelable(false);
    }


    @Override
    protected Boolean doInBackground(String... urls) {
        try {

            //------------------>>
            HttpGet httppost = new HttpGet(urls[0]);
            HttpClient httpclient = new DefaultHttpClient();
            HttpResponse response = httpclient.execute(httppost);

            // StatusLine stat = response.getStatusLine();
            int status = response.getStatusLine().getStatusCode();

            if (status == 200) {
                HttpEntity entity = response.getEntity();
                String data = EntityUtils.toString(entity);


                JSONObject jsono = new JSONObject(data);
                JSONArray jarray = jsono.getJSONArray("restaurant_list_data");

                for (int i = 0; i < jarray.length(); i++) {
                    JSONObject jsonrealobject = jarray.getJSONObject(i);
                    home_listview_model lisviewarray = new home_listview_model();

                    lisviewarray.setRestaurant_id(jsonrealobject.getString("restaurant_id"));
                    lisviewarray.setRestaurant_name(jsonrealobject.getString("restaurant_name"));
                    lisviewarray.setRestaurant_address(jsonrealobject.getString("address"));
                    lisviewarray.setRestaurant_opping_time(jsonrealobject.getString("restaurant_opping_time"));

                    restaurant_Array_list.add(lisviewarray);
                }
                return true;
            }

            //------------------>>

        } catch (ParseException | IOException | JSONException e1) {
            e1.printStackTrace();
        }
        return false;
    }
    protected void onPostExecute(Boolean result) {
        dialog.cancel();
        home_listadapter.notifyDataSetChanged();
        if(result == false){
            Toast.makeText(getApplicationContext(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();
        }
    }
}

这是阵列适配器，我想在其中打开新的 Activity:

    package com.example.nhp04.gqfood;

    import android.content.Context;
    import android.content.Intent;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ArrayAdapter;
    import android.widget.TextView;

    import java.util.ArrayList;


    public class home_listadapter extends ArrayAdapter<home_listview_model> {

    ArrayList<home_listview_model> restaurant_Array_list;
    LayoutInflater vi;
    int Resource;
    ViewHolder holder;

    public home_listadapter(Context context, int resource, ArrayList<home_listview_model> objects) {
        super(context, resource, objects);
        vi = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        Resource = resource;
        restaurant_Array_list = objects;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // convert view = design
        View v = convertView;
        if (v == null) {
            holder = new ViewHolder();
            v = vi.inflate(Resource, null);
            holder.restaurant_id = (TextView)v.findViewById(R.id.restaurant_id);
            holder.restaurant_name = (TextView)v.findViewById(R.id.restaurant_name);
            holder.restaurant_address = (TextView)v.findViewById(R.id.address);
            holder.restaurant_opping_time = (TextView)v.findViewById(R.id.opningtime);
            v.setTag(holder);
        } else {
            holder = (ViewHolder) v.getTag();
        }
        holder.restaurant_id.setText(restaurant_Array_list.get(position).getRestaurant_id());
        holder.restaurant_name.setText(restaurant_Array_list.get(position).getRestaurant_name());
        holder.restaurant_address.setText(restaurant_Array_list.get(position).getRestaurant_address());
        holder.restaurant_opping_time.setText("Opens at "+restaurant_Array_list.get(position).getRestaurant_opping_time());

        holder.restaurant_name.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(home_listadapter.this, restaurent.class));
            }
        });
        return v;

    }

    static class ViewHolder {
        public TextView  restaurant_id;
        public TextView  restaurant_name;
        public TextView  restaurant_address;
        public TextView  restaurant_opping_time;

    }
}

Answer 1

像这样...

holder.restaurant_name.setOnClickListener(new OnClickListener()
    {
        @Override 
        public void onClick(AdapterView<?> arg0, View arg1,int position, long arg3)
        { 
        Intent i = new Intent(context, restaurent.class);
        context.startActivity(i);
        }
    });

Answer 2

将上下文保存在 home_listadapter 构造函数中

Context mContext;

public home_listadapter(Context context, int resource, ArrayList<home_listview_model> objects) {
super(context, resource, objects);
vi = (LayoutInflater) context
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
restaurant_Array_list = objects;
mContext = context;
}

然后在你的 holder.restaurant_name.setOnClickListener

holder.restaurant_name.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent intent = new Intent(mContext, restaurent.class)
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        mContext.startActivity(intent);
    }
});

Answer 3

试试这个：

 Intent intent = new Intent(context, restaurent.class);
 ((Activity) context).startActivity(intent);

Answer 4

试试这个，

在您的适配器构造函数中执行此操作：

Context mContext;
public home_listadapter(Context context, int resource, ArrayList<home_listview_model> objects) {
    super(context, resource, objects);
   mContext=context;
    vi = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    Resource = resource;
    restaurant_Array_list = objects;
}

点击开始 activity:

mContext.startActivity(new Intent(mContext, restaurent.class));

Answer 5

这样做

 holder.restaurant_name.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
              Intent in=new Intent(v.getContext(),SingleItemView.class);
                    v.getContext().startActivity(in);

        }
    });

我想在 Array Adapter 中打开新的 activity 告诉我它是如何实现的

i want to open new activity in Array Adapter tell me how its possible

java

android

java-threads