Java tutorial
package com.lykj.weixun.ui.chat.ui; import android.content.Context; import android.content.Intent; import android.os.Handler; import android.support.v4.widget.SwipeRefreshLayout; import android.view.MotionEvent; import android.view.View; import android.view.WindowManager; import android.view.inputmethod.InputMethodManager; import android.widget.AdapterView; import android.widget.ListView; import android.widget.Toast; import com.hyphenate.chat.EMClient; import com.hyphenate.chat.EMGroup; import com.hyphenate.exceptions.HyphenateException; import com.lykj.bosheng.R; import com.lykj.weixun.ui.chat.Constant; import com.lykj.weixun.ui.chat.adapter.GroupAdapter; import java.util.List; /** * Copyright (C) 2016 Hyphenate Inc. All rights reserved. * <p> * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class GroupsActivity extends com.lykj.weixun.common.BaseActivity { public static final String TAG = "GroupsActivity"; private ListView groupListView; protected List<EMGroup> grouplist; private GroupAdapter groupAdapter; private InputMethodManager inputMethodManager; public static GroupsActivity instance; private View progressBar; private SwipeRefreshLayout swipeRefreshLayout; Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { swipeRefreshLayout.setRefreshing(false); switch (msg.what) { case 0: refresh(); break; case 1: Toast.makeText(GroupsActivity.this, R.string.Failed_to_get_group_chat_information, Toast.LENGTH_LONG).show(); break; default: break; } } }; @Override public int initLayoutId() { return R.layout.em_fragment_groups; } @Override public void initView() { initHeaderBack(R.string.groups_title, 0); instance = this; inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); grouplist = EMClient.getInstance().groupManager().getAllGroups(); groupListView = (ListView) findViewById(R.id.list); //show group list groupAdapter = new GroupAdapter(this, 1, grouplist); groupListView.setAdapter(groupAdapter); swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_layout); swipeRefreshLayout.setColorSchemeResources(R.color.holo_blue_bright, R.color.holo_green_light, R.color.holo_orange_light, R.color.holo_red_light); swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { new Thread() { @Override public void run() { try { EMClient.getInstance().groupManager().getJoinedGroupsFromServer(); handler.sendEmptyMessage(0); } catch (HyphenateException e) { e.printStackTrace(); handler.sendEmptyMessage(1); } } }.start(); } }); groupListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Intent intent = new Intent(GroupsActivity.this, ChatActivity.class); intent.putExtra("chatType", Constant.CHATTYPE_GROUP); intent.putExtra("userId", groupAdapter.getItem(position - 1).getGroupId()); startActivityForResult(intent, 0); } }); groupListView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { if (getWindow() .getAttributes().softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN) { if (getCurrentFocus() != null) inputMethodManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); } return false; } }); } @Override public void initData() { } @Override public void requestData() { } @Override public void updateUI() { } @Override public void onViewClick(View v) { } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); } @Override public void onResume() { refresh(); super.onResume(); } private void refresh() { grouplist = EMClient.getInstance().groupManager().getAllGroups(); groupAdapter = new GroupAdapter(this, 1, grouplist); groupListView.setAdapter(groupAdapter); groupAdapter.notifyDataSetChanged(); } @Override protected void onDestroy() { super.onDestroy(); instance = null; } }