Java tutorial
/** * Copyright (C) 2016 Hyphenate Inc. 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.abroad.ruianju.im.ui; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.view.ViewGroup; import android.view.WindowManager; import android.view.inputmethod.InputMethodManager; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.TextView; import com.abroad.ruianju.R; import com.abroad.ruianju.im.DemoHelper; import com.abroad.ruianju.im.db.UserDao; import com.abroad.ruianju.im.domain.RobotUser; import com.hyphenate.EMValueCallBack; import com.hyphenate.chat.EMClient; import com.hyphenate.chat.EMContact; import com.hyphenate.exceptions.HyphenateException; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; public class RobotsActivity extends BaseActivity { public static final String TAG = RobotsActivity.class.getSimpleName(); private List<RobotUser> robotList = new ArrayList<RobotUser>(); private RobotAdapter adapter; private InputMethodManager inputMethodManager; private View progressBar; private SwipeRefreshLayout swipeRefreshLayout; @Override protected void onCreate(Bundle arg0) { super.onCreate(arg0); setContentView(R.layout.em_fragment_robots); inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); ListView mListView = (ListView) findViewById(R.id.list); swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_layout); if (android.os.Build.VERSION.SDK_INT >= 14) { 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); } progressBar = findViewById(R.id.progress_bar); swipeRefreshLayout.setOnRefreshListener(new OnRefreshListener() { @Override public void onRefresh() { getRobotNamesFromServer(); } }); Map<String, RobotUser> robotMap = DemoHelper.getInstance().getRobotList(); if (robotMap != null) { robotList.addAll(robotMap.values()); } else { progressBar.setVisibility(View.VISIBLE); getRobotNamesFromServer(); } adapter = new RobotAdapter(this, 1, robotList); mListView.setAdapter(adapter); mListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { RobotUser user = (RobotUser) parent.getItemAtPosition(position); Intent intent = new Intent(); intent.setClass(RobotsActivity.this, ChatActivity.class); intent.putExtra("userId", user.getUsername()); startActivity(intent); } }); mListView.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; } }); } private void getRobotNamesFromServer() { asyncGetRobotNamesFromServer(new EMValueCallBack<List<EMContact>>() { @Override public void onSuccess(final List<EMContact> value) { runOnUiThread(new Runnable() { @Override public void run() { progressBar.setVisibility(View.GONE); swipeRefreshLayout.setRefreshing(false); Map<String, RobotUser> mMap = new HashMap<String, RobotUser>(); for (EMContact item : value) { RobotUser user = new RobotUser(item.getUsername()); user.setNick(item.getNick()); user.setInitialLetter("#"); mMap.put(item.getUsername(), user); } robotList.clear(); robotList.addAll(mMap.values()); // save it in cache DemoHelper.getInstance().setRobotList(mMap); // save it in database UserDao dao = new UserDao(RobotsActivity.this); dao.saveRobotUser(robotList); adapter.notifyDataSetChanged(); } }); } @Override public void onError(int error, String errorMsg) { runOnUiThread(new Runnable() { @Override public void run() { swipeRefreshLayout.setRefreshing(false); progressBar.setVisibility(View.GONE); } }); } }); } private void asyncGetRobotNamesFromServer(final EMValueCallBack<List<EMContact>> callback) { new Thread(new Runnable() { @Override public void run() { try { List<EMContact> mList = EMClient.getInstance().getRobotsFromServer(); callback.onSuccess(mList); } catch (HyphenateException e) { e.printStackTrace(); callback.onError(e.getErrorCode(), e.toString()); } } }).start(); } class RobotAdapter extends ArrayAdapter<RobotUser> { private LayoutInflater inflater; public RobotAdapter(Context context, int res, List<RobotUser> robots) { super(context, res, robots); this.inflater = LayoutInflater.from(context); } @Override public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) { convertView = inflater.inflate(R.layout.em_row_robots, parent, false); } ((TextView) convertView.findViewById(R.id.name)).setText(getItem(position).getNick()); return convertView; } } }