Fragment 中 ListView绑定ContextMenu

package com.example.administrator.imbobo.controller.fragment;

import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.support.v4.content.LocalBroadcastManager;import android.view.ContextMenu;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.Toast;

import com.example.administrator.imbobo.controller.activity.AddContactActivity;import com.example.administrator.imbobo.model.Model;import com.example.administrator.imbobo.model.bean.UserInfo;import com.example.administrator.imbobo.utils.Constant;import com.example.administrator.imbobo.utils.SpUtils;import com.hyphenate.chat.EMClient;import com.hyphenate.easeui.domain.EaseUser;import com.hyphenate.easeui.ui.EaseContactListFragment;import com.example.administrator.imbobo.R;import com.example.administrator.imbobo.controller.activity.InviteActivity;import com.hyphenate.exceptions.HyphenateException;

import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;

/** * Created by Leon on 2018/10/6 * Functions: 联系人列表页面  EaseContactListFragment 环信集成的 */public class ContactListFragment extends EaseContactListFragment {

private ImageView iv_contact_red;    private LocalBroadcastManager mLBM;    private LinearLayout ll_contact_invite;    private String mHxid;

//接收到广播的处理    private BroadcastReceiver contactChangeReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            //刷新页面            refreshContact();        }    };

//接收到广播的处理    private BroadcastReceiver receiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {

//更新红点显示            iv_contact_red.setVisibility(View.VISIBLE);            SpUtils.getInstance().save(SpUtils.IS_NEW_INVITE,true);        }    };

//接收到广播的处理    private BroadcastReceiver leReceiver = new BroadcastReceiver(){        @Override        public void onReceive(Context context, Intent intent) {            //不要红点显示刚从InviteActivity（邀请信息列表）回来不要显示            iv_contact_red.setVisibility(View.GONE);            SpUtils.getInstance().save(SpUtils.IS_NEW_INVITE,false);        }    };

//initView() 实现EaseContactListFragment中的抽象方法    @Override    protected void initView() {        super.initView();

//布局显示右上角+        titleBar.setRightImageResource(R.drawable.em_add);

//头布局添加        View headerView = View.inflate(getActivity(),R.layout.header_fragment_contact,null);        listView.addHeaderView(headerView);

//获取红点对象（imageview）        iv_contact_red = (ImageView)headerView.findViewById(R.id.iv_contact_red);

//获取邀请信息条目的点击事件        ll_contact_invite = headerView.findViewById(R.id.ll_contact_invite);

}

//setUpView() 实现EaseContactListFragment中的抽象方法    @Override    protected void setUpView() {        super.setUpView();

//添加按钮的点击事件处理        titleBar.setRightLayoutClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent(getActivity(),AddContactActivity.class);                startActivity(intent);            }        });

//初始化红点的显示        boolean isNewInvite = SpUtils.getInstance().getBooleanPre(SpUtils.IS_NEW_INVITE,false);        iv_contact_red.setVisibility(isNewInvite?View.VISIBLE:View.GONE);

//邀请信息条目的点击事件        ll_contact_invite.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                //红点处理（隐藏掉）                iv_contact_red.setVisibility(View.GONE);                SpUtils.getInstance().save(SpUtils.IS_NEW_INVITE,false);

//跳转到邀请信息处理列表页面                Intent intent = new Intent(getActivity(),InviteActivity.class);                startActivity(intent);            }        });

//注册广播        mLBM = LocalBroadcastManager.getInstance(getActivity());        //ContactInviteChangeReceiver - receiver        mLBM.registerReceiver(receiver,new IntentFilter(Constant.CONTACT_INVITE_CHANGED));        mLBM.registerReceiver(leReceiver,new IntentFilter(Constant.LEONBROADCAST));        mLBM.registerReceiver(contactChangeReceiver,new IntentFilter(Constant.CONTACT_CHANGED));

//从环信服务器上获取所有的联系人信息        getContactFromHxServer();

//绑定listView和contextmenu       ***********************************************************************************************        registerForContextMenu(listView);    }

//创建contextmenu时会调用这个方法**************************************************************************    @Override    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {        super.onCreateContextMenu(menu, v, menuInfo);        //获取环信id先获取postion        int postion = ((AdapterView.AdapterContextMenuInfo)menuInfo).position;        EaseUser easeUser = (EaseUser) listView.getItemAtPosition(postion);        //username 就是 环信id        mHxid = easeUser.getUsername();        //添加布局        getActivity().getMenuInflater().inflate(R.menu.delete,menu);    }

　　//当contextmenu（listview上的item被选中）被选中时调用这个方法************************************************************     @Override    public boolean onContextItemSelected(MenuItem item) {

//R.id.contact_delete 之前写了R.menu.delete 产生了bug        if (item.getItemId() == R.id.contact_delete){            //删除选中的联系人操作            deleteContact();

return true;        }

return super.onContextItemSelected(item);    }

//删除选中的联系人操作    private void deleteContact(){

//开辟子线程进行网络请求        Model.getInstance().getGloabalThreadPool().execute(new Runnable() {            @Override            public void run() {                try {                    //从环信服务器中删除联系人                    EMClient.getInstance().contactManager().deleteContact(mHxid);

//本地数据库的更新                    Model.getInstance().getDbManager().getContactTableDao().deleteContactByHxId(mHxid);

//避免空指针异常                    if ( getActivity() == null){ return; }                    getActivity().runOnUiThread(new Runnable() {                        @Override                        public void run() {                            //toast提示                            Toast.makeText(getActivity(),"删除"+mHxid+"成功",Toast.LENGTH_SHORT).show();

//刷新页面                            refreshContact();                        }                    });                } catch (final HyphenateException e) {                    e.printStackTrace();                    //避免空指针异常                    if ( getActivity() == null){ return; }                    getActivity().runOnUiThread(new Runnable() {                        @Override                        public void run() {                            //toast提示                            Toast.makeText(getActivity(),"删除失败: "+e.toString(),Toast.LENGTH_SHORT).show();                        }                    });

}            }        });

}

//从环信服务器上获取所有的联系人信息    private void  getContactFromHxServer(){        //开辟子线程做联网操作        Model.getInstance().getGloabalThreadPool().execute(new Runnable() {            @Override            public void run() {                try {                    //获取到所有的好友的环信id                    List<String> hxids = EMClient.getInstance().contactManager().getAllContactsFromServer();

//校验- 注意这里用的是>= 0将来要注意异常                    if (hxids != null && hxids.size() >= 0){

//创建一个UserInfo的集合                        List<UserInfo> contacts = new ArrayList<>();

//转换集合                        for (String hxid : hxids){                            UserInfo userInfo = new UserInfo(hxid);                            contacts.add(userInfo);                        }

//保存好友信息到本地数据库                        Model.getInstance().getDbManager().getContactTableDao().saveContacts(contacts,                                true);

//避免下面空指针异常（刷新页面）                        if (getActivity() == null){ return; }                        //刷新页面-回到主线程操作                        getActivity().runOnUiThread(new Runnable() {                            @Override                            public void run() {                                //刷新页面的方法                                refreshContact();                            }                        });

}

} catch (HyphenateException e) {                    e.printStackTrace();                }            }        });    }

//刷新页面的方法    private void  refreshContact(){

//获取数据        List<UserInfo> contacts = Model.getInstance().getDbManager().getContactTableDao().getCountacts();

//校验获取到的数据 注意这个地方用的是>= 0 可能会有异常        if (contacts != null && contacts.size() >= 0){

// 设置数据 Map<String, EaseUser> contactsMap            Map<String,EaseUser> contactsMap = new HashMap<>();

//数据转换            for (UserInfo contact : contacts){                EaseUser easeUser = new EaseUser(contact.getHxid());                contactsMap.put(contact.getHxid(),easeUser);            }

//设置联系人Map，键是hyphenate id。            setContactsMap(contactsMap);

//刷新页面            refresh();

}    }

@Override    public void onDestroy() {

//注册的广播一定要关闭掉        mLBM.unregisterReceiver(receiver);        mLBM.unregisterReceiver(leReceiver);        mLBM.unregisterReceiver(contactChangeReceiver);        super.onDestroy();    }}

原文地址：https://www.cnblogs.com/henanleon/p/9942980.html