AndroidRuntime: java.lang.NullPointerExcom.easemob.analytics.EMActiveCollector$1.run(Unknown Source)

错误：

12-15 15:21:57.546 11772 11797 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.replaceFirst(java.lang.String, java.lang.String)' on a null object reference
12-15 15:21:57.546 11772 11797 E AndroidRuntime: at com.easemob.analytics.EMActiveCollector$1.run(Unknown Source)
12-15 15:21:57.546 11772 11797 E AndroidRuntime: at java.lang.Thread.run(Thread.java:818)

报错的类中显示这样：

 public static void sendActivePacket(final Context var0) {
        boolean var1 = PreferenceManager.getDefaultSharedPreferences(var0).getBoolean("actived", false);
        if(var1) {
            EMLog.d("init", "s");
        } else {
            try {
                EMLog.d("init", "d");
                (new Thread(new Runnable() {
                    public void run() {
                        StringBuilder var1 = new StringBuilder();
                        if(p.c().i()) {
                            var1.append("https://");
                        } else {
                            var1.append("http://");
                        }

                        String var2 = p.c().l();
                        if(var2.startsWith("http")) {
                            var1 = new StringBuilder(var2);
                        } else {
                            var1.append(var2);
                        }

                        var1.append("/");
                        var1.append(EMChatConfig.getInstance().APPKEY.replaceFirst("#", "/"));
                        var1.append("/devices");
                        String var3 = null;

                        try {
                            String var4 = EMActiveCollector.collectActiveInfo(var0);
                            HashMap var8 = new HashMap();
                            var3 = HttpClientManager.sendHttpRequest(var1.toString(), var8, var4, HttpClientManager.Method_POST);
                            if(var3.contains("uuid") || var3.contains("duplicate_unique_property_exists")) {
                                Editor var6 = PreferenceManager.getDefaultSharedPreferences(var0).edit();
                                var6.putBoolean("actived", true);
                                var6.commit();
                            }
                        } catch (Exception var7) {
                            if(var7.toString().contains("duplicate_unique")) {
                                Editor var5 = PreferenceManager.getDefaultSharedPreferences(var0).edit();
                                var5.putBoolean("actived", true);
                                var5.commit();
                            }
                        }

                    }
                })).start();
            } catch (Exception var3) {
                var3.printStackTrace();
            }

        }
    }

其中有一句 ： 

EMChatConfig.getInstance().APPKEY.replaceFirst("#", "/")

注意蓝色部分，环信聊天配置实例的APPKEY为空，所以报错了

解决方法很简单，在AndroidManifest.xml的application节点中加上

<application>

 
<!-- 设置环信应用的appkey -->
        <!--
        	测试账号，密码 
        <meta-data
            android:name="EASEMOB_APPKEY"
            android:value="-----" />
        -->
        <meta-data
            android:name="EASEMOB_APPKEY"
            android:value="-----" />
        <!-- 声明sdk所需的service -->
        <service
            android:name="com.easemob.chat.EMChatService"
            android:exported="true" />

        <!-- 声明sdk所需的receiver -->
        <receiver android:name="com.easemob.chat.EMMonitorReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.PACKAGE_REMOVED" />

                <data android:scheme="package" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                <action android:name="android.intent.action.USER_PRESENT" />
            </intent-filter>
        </receiver>

        <!-- 声明注册时拦截消息对话框信息  receiver -->
        <!--
        <receiver android:name="com.pggmall.origin.receiver.MessageDemo">
			<intent-filter android:priority="11">
				<action android:name="android.provider.Telephony.SMS_RECEIVED" />
			</intent-filter>
		</receiver>
        -->


        <!-- 百度地图所需的service -->
        <service
            android:name="com.baidu.location.f"
            android:enabled="true"
            android:process=":remote" />
        <!-- umeng appkey，可忽略  原来是 ----- 后来申请了替换成自己的 -->
        <meta-data
            android:name="UMENG_APPKEY"
            android:value="-----" >
        </meta-data>
        <meta-data
            android:name="com.baidu.lbsapi.API_KEY"
            android:value="-----" />

</application>