环信官方Demo源码分析及SDK简单应用-ChatDemoUI3.0
环信官方Demo源码分析及SDK简单应用-LoginActivity
环信官方Demo源码分析及SDK简单应用-主界面的三个fragment-会话界面
环信官方Demo源码分析及SDK简单应用-主界面的三个fragment-通讯录界面
环信官方Demo源码分析及SDK简单应用-主界面的三个fragment-设置界面
环信官方Demo源码分析及SDK简单应用-IM集成开发详案及具体代码实现
上文我们在已经登录的情况下来到的MainActivity，那么我们在没有登录情况下呢，当然是来登陆页面。下面我们来看登录页。
LoginActivity
/** * 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.hyphenate.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.hyphenate.EMCallBack;import com.hyphenate.chat.EMClient;import com.hyphenate.chatuidemo.DemoApplication;import com.hyphenate.chatuidemo.DemoHelper;import com.hyphenate.chatuidemo.R;import com.hyphenate.chatuidemo.db.DemoDBManager;import com.hyphenate.easeui.utils.EaseCommonUtils;/** * Login screen * */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; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // enter the main activity if already logged in 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); // if user changed, clear the password 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()); } } /** * login * * @param view */ public void login(View view) { if (!EaseCommonUtils.isNetWorkConnected(this)) { Toast.makeText(this, R.string.network_isnot_available, Toast.LENGTH_SHORT).show(); return; } String currentUsername = usernameEditText.getText().toString().trim(); String 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) { Log.d(TAG, "EMClient.getInstance().onCancel"); progressShow = false; } }); pd.setMessage(getString(R.string.Is_landing)); pd.show(); // After logout，the DemoDB may still be accessed due to async callback, so the DemoDB will be re-opened again. // close it before login to make sure DemoDB not overlap DemoDBManager.getInstance().closeDB(); // reset current user name before login DemoHelper.getInstance().setCurrentUserName(currentUsername); final long start = System.currentTimeMillis(); // call login method Log.d(TAG, "EMClient.getInstance().login"); EMClient.getInstance().login(currentUsername, currentPassword, new EMCallBack() { @Override public void onSuccess() { Log.d(TAG, "login: onSuccess"); // ** manually load all local groups and conversation EMClient.getInstance().groupManager().loadAllGroups(); EMClient.getInstance().chatManager().loadAllConversations(); // update current user's display name for APNs boolean updatenick = EMClient.getInstance().pushManager().updatePushNickname( DemoApplication.currentUserNick.trim()); if (!updatenick) { Log.e("LoginActivity", "update current user nick fail"); } if (!LoginActivity.this.isFinishing() && pd.isShowing()) { pd.dismiss(); } // get user's info (this should be get from App's server or 3rd party service) DemoHelper.getInstance().getUserProfileManager().asyncGetCurrentUserInfo(); Intent intent = new Intent(LoginActivity.this, MainActivity.class); startActivity(intent); finish(); } @Override public void onProgress(int progress, String status) { Log.d(TAG, "login: onProgress"); } @Override public void onError(final int code, final String message) { Log.d(TAG, "login: onError: " + code); if (!progressShow) { return; } runOnUiThread(new Runnable() { public void run() { pd.dismiss(); Toast.makeText(getApplicationContext(), getString(R.string.Login_failed) + message, Toast.LENGTH_SHORT).show(); } }); } }); } /** * register * * @param view */ public void register(View view) { startActivityForResult(new Intent(this, RegisterActivity.class), 0); } @Override protected void onResume() { super.onResume(); if (autoLogin) { return; } }}
我们挨个来阅读
自动登录
if (DemoHelper.getInstance().isLoggedIn()) {
autoLogin = true;
startActivity(new Intent(LoginActivity.this, MainActivity.class));
return;
}
如果已经登录那么设置自动标志位为true，跳到主界面去。
用户名文本变动监听
// if user changed, clear the password
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());
}
简单的文本变化监听，用户名变化了就把密码给清空一下。
下面我们来看登录逻辑
登录逻辑
首先判断当前是否有网络连接
if (!EaseCommonUtils.isNetWorkConnected(this)) {
Toast.makeText(this, R.string.network_isnot_available, Toast.LENGTH_SHORT).show();
return;
}
我们来看看这个工具类是怎么写的
/**
* check if network avalable
*
* @param context
* @return
*/
public static boolean isNetWorkConnected(Context context) {
if (context != null) {
ConnectivityManager mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
if (mNetworkInfo != null) {
return mNetworkInfo.isAvailable() && mNetworkInfo.isConnected();
}
}
return false;
}
大家常用的通用判断网络连接方法。
接着往下看
String currentUsername = usernameEditText.getText().toString().trim();
String 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) {
Log.d(TAG, "EMClient.getInstance().onCancel");
progressShow = false;
}
});
pd.setMessage(getString(R.string.Is_landing));
pd.show();
正常的取值，弹个进度框。
来看比较有意思的
// After logout，the DemoDB may still be accessed due to async callback, so the DemoDB will be re-opened again.
// close it before login to make sure DemoDB not overlap
DemoDBManager.getInstance().closeDB();
// reset current user name before login
DemoHelper.getInstance().setCurrentUserName(currentUsername);
英文不好，大致的意思就是注销以后，DemoDB可能会依然在执行一些异步回调，所以DemoDB会再次重新打开，所以我们要在登陆之前确保DemoDB不会被Overlap。所以我们关闭一下数据库。
然后就是在登陆之前重新设置下当前登陆的用户名
下面就是具体的登陆实现了
EMClient.getInstance().login(currentUsername, currentPassword, new EMCallBack() {
@Override
public void onSuccess() {
Log.d(TAG, "login: onSuccess");
// ** manually load all local groups and conversation
EMClient.getInstance().groupManager().loadAllGroups();
EMClient.getInstance().chatManager().loadAllConversations();
// update current user's display name for APNs
boolean updatenick = EMClient.getInstance().pushManager().updatePushNickname(
DemoApplication.currentUserNick.trim());
if (!updatenick) {
Log.e("LoginActivity", "update current user nick fail");
}
if (!LoginActivity.this.isFinishing() && pd.isShowing()) {
pd.dismiss();
}
// get user's info (this should be get from App's server or 3rd party service)
DemoHelper.getInstance().getUserProfileManager().asyncGetCurrentUserInfo();
Intent intent = new Intent(LoginActivity.this,
MainActivity.class);
startActivity(intent);
finish();
}
@Override
public void onProgress(int progress, String status) {
Log.d(TAG, "login: onProgress");
}
@Override
public void onError(final int code, final String message) {
Log.d(TAG, "login: onError: " + code);
if (!progressShow) {
return;
}
runOnUiThread(new Runnable() {
public void run() {
pd.dismiss();
Toast.makeText(getApplicationContext(), getString(R.string.Login_failed) + message,
Toast.LENGTH_SHORT).show();
}
});
}
});
我们看到环信封装了自己实现的登陆方法，并做了回调。
三个接口:
onSuccess() 成功了
onError() 嗝屁了
onProgress 处理中
我们看onSuccess中的代码
// ** manually load all local groups and conversation
EMClient.getInstance().groupManager().loadAllGroups();
EMClient.getInstance().chatManager().loadAllConversations();
// update current user's display name for APNs
boolean updatenick = EMClient.getInstance().pushManager().updatePushNickname(
DemoApplication.currentUserNick.trim());
if (!updatenick) {
Log.e("LoginActivity", "update current user nick fail");
}
if (!LoginActivity.this.isFinishing() && pd.isShowing()) {
pd.dismiss();
}
// get user's info (this should be get from App's server or 3rd party service)
DemoHelper.getInstance().getUserProfileManager().asyncGetCurrentUserInfo();
Intent intent = new Intent(LoginActivity.this,
MainActivity.class);
startActivity(intent);
finish();
我们看到跳转到MainActivity之前通用做了相同的群组加载
// ** manually load all local groups and conversation
EMClient.getInstance().groupManager().loadAllGroups();
EMClient.getInstance().chatManager().loadAllConversations();
// update current user's display name for APNs
boolean updatenick = EMClient.getInstance().pushManager().updatePushNickname(
DemoApplication.currentUserNick.trim());
if (!updatenick) {
Log.e("LoginActivity", "update current user nick fail");
}
if (!LoginActivity.this.isFinishing() && pd.isShowing()) {
pd.dismiss();
}
更新当前的推送昵称。
// get user's info (this should be get from App's server or 3rd party service)
DemoHelper.getInstance().getUserProfileManager().asyncGetCurrentUserInfo();
Intent intent = new Intent(LoginActivity.this,
MainActivity.class);
startActivity(intent);
finish();
异步的从App后台或者三方库中获取用户信息，想想我们之前看他的分包的时候，是不是见到过parse这个包。就是这玩意。
然后跳转到主界面
/**
* register
*
* @param view
*/
public void register(View view) {
startActivityForResult(new Intent(this, RegisterActivity.class), 0);
}
@Override
protected void onResume() {
super.onResume();
if (autoLogin) {
return;
}
}
然后便是注册了，是直接跳到注册界面去。onResume中如果已经登录直接return掉。
那么我们看完了这些Activity了，接着看啥呢？啰嗦了这么久，我们终于可以看具体的主界面的三个Fragment了。
