LoginActivity.java

/**
 * 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.ui;

import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import com.easemob.EMCallBack;
import com.easemob.chat.EMChatManager;
import com.easemob.chat.EMGroupManager;
import com.easemob.chatuidemo.DemoApplication;
import com.easemob.chatuidemo.DemoHelper;
import com.easemob.chatuidemo.R;
import com.easemob.easeui.utils.EaseCommonUtils;

/**
 * 登陆页面
 * 
 */
public class LoginActivity extends BaseActivity {
	private static final String TAG = "LoginActivity";
	public static final int REQUEST_CODE_SETNICK = 1;
	private EditText usernameEditText;
	private EditText passwordEditText;

	private boolean progressShow;
	private boolean autoLogin = false;

	private String currentUsername;
	private String currentPassword;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		// 如果登录成功过，直接进入主页面
		if (DemoHelper.getInstance().isLoggedIn()) {
			autoLogin = true;
			startActivity(new Intent(LoginActivity.this, MainActivity.class));

			return;
		}
		setContentView(R.layout.em_activity_login);

		usernameEditText = (EditText) findViewById(R.id.username);
		passwordEditText = (EditText) findViewById(R.id.password);

		// 如果用户名改变，清空密码
		usernameEditText.addTextChangedListener(new TextWatcher() {
			@Override
			public void onTextChanged(CharSequence s, int start, int before, int count) {
				passwordEditText.setText(null);
			}

			@Override
			public void beforeTextChanged(CharSequence s, int start, int count, int after) {

			}

			@Override
			public void afterTextChanged(Editable s) {

			}
		});
		if (DemoHelper.getInstance().getCurrentUsernName() != null) {
			usernameEditText.setText(DemoHelper.getInstance().getCurrentUsernName());
		}
	}

	/**
	 * 登录
	 * 
	 * @param view
	 */
	public void login(View view) {
		if (!EaseCommonUtils.isNetWorkConnected(this)) {
			Toast.makeText(this, R.string.network_isnot_available, Toast.LENGTH_SHORT).show();
			return;
		}
		currentUsername = usernameEditText.getText().toString().trim();
		currentPassword = passwordEditText.getText().toString().trim();

		if (TextUtils.isEmpty(currentUsername)) {
			Toast.makeText(this, R.string.User_name_cannot_be_empty, Toast.LENGTH_SHORT).show();
			return;
		}
		if (TextUtils.isEmpty(currentPassword)) {
			Toast.makeText(this, R.string.Password_cannot_be_empty, Toast.LENGTH_SHORT).show();
			return;
		}

		progressShow = true;
		final ProgressDialog pd = new ProgressDialog(LoginActivity.this);
		pd.setCanceledOnTouchOutside(false);
		pd.setOnCancelListener(new OnCancelListener() {

			@Override
			public void onCancel(DialogInterface dialog) {
				progressShow = false;
			}
		});
		pd.setMessage(getString(R.string.Is_landing));
		pd.show();

		final long start = System.currentTimeMillis();
		// 调用sdk登陆方法登陆聊天服务器
		EMChatManager.getInstance().login(currentUsername, currentPassword, new EMCallBack() {

			@Override
			public void onSuccess() {
				if (!progressShow) {
					return;
				}
				// 登陆成功，保存用户名
				DemoHelper.getInstance().setCurrentUserName(currentUsername);
				// 注册群组和联系人监听
				DemoHelper.getInstance().registerGroupAndContactListener();

				// ** 第一次登录或者之前logout后再登录，加载所有本地群和回话
				// ** manually load all local groups and
			    EMGroupManager.getInstance().loadAllGroups();
				EMChatManager.getInstance().loadAllConversations();
				
				//异步获取当前用户的昵称和头像(从自己服务器获取，demo使用的一个第三方服务)
				DemoHelper.getInstance().getUserProfileManager().asyncGetCurrentUserInfo();
				
				if (!LoginActivity.this.isFinishing() && pd.isShowing()) {
					pd.dismiss();
				}
				// 进入主页面
				Intent intent = new Intent(LoginActivity.this,
						MainActivity.class);
				startActivity(intent);
				
				finish();
			}

			@Override
			public void onProgress(int progress, String status) {
			}

			@Override
			public void onError(final int code, final String message) {
				if (!progressShow) {
					return;
				}
				runOnUiThread(new Runnable() {
					public void run() {
						pd.dismiss();
						Toast.makeText(getApplicationContext(), getString(R.string.Login_failed) + message,
								Toast.LENGTH_SHORT).show();
					}
				});
			}
		});
	}

	
	/**
	 * 注册
	 * 
	 * @param view
	 */
	public void register(View view) {
		startActivityForResult(new Intent(this, RegisterActivity.class), 0);
	}

	@Override
	protected void onResume() {
		super.onResume();
		if (autoLogin) {
			return;
		}
	}
}