Java tutorial
/** * Copyright (C) 2013-2014 EaseMob Technologies. All rights reserved. * * 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. */ package com.easemob.chatuidemo.activity; import java.util.List; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.view.WindowManager; import android.view.inputmethod.InputMethodManager; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView; import android.widget.Toast; import com.easemob.applib.controller.HXSDKHelper; import com.easemob.chat.EMGroup; import com.easemob.chat.EMGroupManager; import com.easemob.chatuidemo.R; import com.easemob.chatuidemo.adapter.GroupAdapter; import com.easemob.util.EMLog; public class GroupsActivity extends 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 SyncListener syncListener; private View progressBar; private SwipeRefreshLayout swipeRefreshLayout; Handler handler = new Handler(); class SyncListener implements HXSDKHelper.HXSyncListener { @Override public void onSyncSucess(final boolean success) { EMLog.d(TAG, "onSyncGroupsFinish success:" + success); runOnUiThread(new Runnable() { @Override public void run() { swipeRefreshLayout.setRefreshing(false); if (success) { handler.postDelayed(new Runnable() { @Override public void run() { refresh(); progressBar.setVisibility(View.GONE); } }, 1000); } else { if (!GroupsActivity.this.isFinishing()) { String s1 = getResources().getString(R.string.Failed_to_get_group_chat_information); Toast.makeText(GroupsActivity.this, s1, Toast.LENGTH_LONG).show(); progressBar.setVisibility(View.GONE); } } } }); } } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.fragment_groups); instance = this; inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); grouplist = EMGroupManager.getInstance().getAllGroups(); groupListView = (ListView) findViewById(R.id.list); swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_layout); swipeRefreshLayout.setColorSchemeResources(android.R.color.holo_blue_bright, android.R.color.holo_green_light, android.R.color.holo_orange_light, android.R.color.holo_red_light); swipeRefreshLayout.setOnRefreshListener(new OnRefreshListener() { @Override public void onRefresh() { MainActivity.asyncFetchGroupsFromServer(); } }); groupAdapter = new GroupAdapter(this, 1, grouplist); groupListView.setAdapter(groupAdapter); groupListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (position == 1) { // ? startActivityForResult(new Intent(GroupsActivity.this, NewGroupActivity.class), 0); } else if (position == 2) { // startActivityForResult(new Intent(GroupsActivity.this, PublicGroupsActivity.class), 0); } else { // ? Intent intent = new Intent(GroupsActivity.this, ChatActivity.class); // it is group chat intent.putExtra("chatType", ChatActivity.CHATTYPE_GROUP); intent.putExtra("groupId", groupAdapter.getItem(position - 3).getGroupId()); startActivityForResult(intent, 0); } } }); groupListView.setOnTouchListener(new 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; } }); progressBar = findViewById(R.id.progress_bar); syncListener = new SyncListener(); HXSDKHelper.getInstance().addSyncGroupListener(syncListener); if (!HXSDKHelper.getInstance().isGroupsSyncedWithServer()) { progressBar.setVisibility(View.VISIBLE); } else { progressBar.setVisibility(View.GONE); } refresh(); } /** * ? */ public void onPublicGroups(View view) { startActivity(new Intent(this, PublicGroupsActivity.class)); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); } @Override public void onResume() { super.onResume(); grouplist = EMGroupManager.getInstance().getAllGroups(); groupAdapter = new GroupAdapter(this, 1, grouplist); groupListView.setAdapter(groupAdapter); groupAdapter.notifyDataSetChanged(); } @Override protected void onDestroy() { if (syncListener != null) { HXSDKHelper.getInstance().removeSyncGroupListener(syncListener); syncListener = null; } super.onDestroy(); instance = null; } public void refresh() { if (groupListView != null && groupAdapter != null) { grouplist = EMGroupManager.getInstance().getAllGroups(); groupAdapter = new GroupAdapter(GroupsActivity.this, 1, grouplist); groupListView.setAdapter(groupAdapter); groupAdapter.notifyDataSetChanged(); } } /** * * * @param view */ @Override public void back(View view) { finish(); } }