/**
* 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.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AbsListView.OnScrollListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AbsListView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.easemob.chat.EMChatManager;
import com.easemob.chat.EMCursorResult;
import com.easemob.chat.EMGroupInfo;
import com.easemob.chat.EMGroupManager;
import com.sxit.dreamiya.R;
import com.easemob.exceptions.EaseMobException;
import com.easemob.util.NetUtils;
public class PublicGroupsActivity extends BaseActivity {
private ProgressBar pb;
private ListView listView;
private GroupsAdapter adapter;
private List<EMGroupInfo> groupsList;
private boolean isLoading;
private boolean isFirstLoading = true;
private boolean hasMoreData = true;
private String cursor;
private final int pagesize = 20;
private LinearLayout footLoadingLayout;
private ProgressBar footLoadingPB;
private TextView footLoadingText;
private Button searchBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_public_groups);
pb = (ProgressBar) findViewById(R.id.progressBar);
listView = (ListView) findViewById(R.id.list);
groupsList = new ArrayList<EMGroupInfo>();
searchBtn = (Button) findViewById(R.id.btn_search);
View footView = getLayoutInflater().inflate(R.layout.listview_footer_view, null);
footLoadingLayout = (LinearLayout) footView.findViewById(R.id.loading_layout);
footLoadingPB = (ProgressBar)footView.findViewById(R.id.loading_bar);
footLoadingText = (TextView) footView.findViewById(R.id.loading_text);
listView.addFooterView(footView, null, false);
footLoadingLayout.setVisibility(View.GONE);
//获取及显示数据
loadAndShowData();
//设置item点击事件
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
startActivity(new Intent(PublicGroupsActivity.this, GroupSimpleDetailActivity.class).
putExtra("groupinfo", adapter.getItem(position)));
}
});
listView.setOnScrollListener(new OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if(scrollState == OnScrollListener.SCROLL_STATE_IDLE){
if(listView.getCount() != 0){
int lasPos = view.getLastVisiblePosition();
if(hasMoreData && !isLoading && lasPos == listView.getCount()-1){
loadAndShowData();
}
}
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
}
});
}
/**
* 搜索
* @param view
*/
public void search(View view){
startActivity(new Intent(this, PublicGroupsSeachActivity.class));
}
private void loadAndShowData(){
new Thread(new Runnable() {
public void run() {
try {
isLoading = true;
final EMCursorResult<EMGroupInfo> result = EMGroupManager.getInstance().getPublicGroupsFromServer(pagesize, cursor);
//获取group list
final List<EMGroupInfo> returnGroups = result.getData();
runOnUiThread(new Runnable() {
public void run() {
searchBtn.setVisibility(View.VISIBLE);
groupsList.addAll(returnGroups);
if(returnGroups.size() != 0){
//获取cursor
cursor = result.getCursor();
if(returnGroups.size() == pagesize)
footLoadingLayout.setVisibility(View.VISIBLE);
}
if(isFirstLoading){
pb.setVisibility(View.INVISIBLE);
isFirstLoading = false;
//设置adapter
adapter = new GroupsAdapter(PublicGroupsActivity.this, 1, groupsList);
listView.setAdapter(adapter);
}else{
if(returnGroups.size() < pagesize){
hasMoreData = false;
footLoadingLayout.setVisibility(View.VISIBLE);
footLoadingPB.setVisibility(View.GONE);
footLoadingText.setText("No more data");
}
adapter.notifyDataSetChanged();
}
isLoading = false;
}
});
} catch (EaseMobException e) {
e.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
isLoading = false;
pb.setVisibility(View.INVISIBLE);
footLoadingLayout.setVisibility(View.GONE);
Toast.makeText(PublicGroupsActivity.this, "加载数据失败，请检查网络或稍后重试", 0).show();
}
});
}
}
}).start();
}
/**
* adapter
*
*/
private class GroupsAdapter extends ArrayAdapter<EMGroupInfo> {
private LayoutInflater inflater;
public GroupsAdapter(Context context, int res, List<EMGroupInfo> groups) {
super(context, res, groups);
this.inflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = inflater.inflate(R.layout.row_group, null);
}
((TextView) convertView.findViewById(R.id.name)).setText(getItem(position).getGroupName());
return convertView;
}
}
public void back(View view){
finish();
}
}