Filter：过滤器概念：生活中的过滤器：净水器,空气净化器，土匪、web中的过滤器：当访问服务器的资源时，过滤器可以将请求拦截下来，完成一些特殊的功能。过滤器的作用：一般用于完成通用的操作。

ManiFest代码：<receiverandroid:name=".service.MainReceiver"android:enabled="true"><intent-filter

com.ximalaya.ting.android.opensdk.player.receive.PlayerReceiver"android:exported="true"android:process=":player"><intent-filter

编写了一个检测到USB设备插入就启动某程序的功能，但每插入一次就会多启动一份，如何防止多开<activityandroid:name=".MainActivity"><intent-filter

<receiverandroid:name=".BootCompleteReceiver"android:exported="true"><intent-filter><actionandroid

activityandroid:name=".LandscapeActivity"android:screenOrientation="landscape"><intent-filter

(DelegatingFilterProxy.java:357) at org.springframework.web.filter.DelegatingFilterProxy.doFilter

activity.UserActivity"android:launchMode="singleTask"android:screenOrientation="fullSensor"><intent-filter

--自己的乱码filter--><!--<filter>--><!

中间操作（IntermediateOperations）：过滤：filter(Predicatepredicate)，根据给定的条件过滤流中的元素。

rollingFile"class="ch.qos.logback.core.rolling.RollingFileAppender"><filterclass="ch.qos.logback.classic.filter.ThresholdFilter

truereset-enable:trueurl-pattern:/druid/*login-username:{username}login-password:{password}#基础监控配置web-stat-filter

(DelegatingFilterProxy.java:358) ~[spring-web-5.3.7.jar:5.3.7] at org.springframework.web.filter.DelegatingFilterProxy.doFilter

好像也不行

apiService.validatePassword(validateBody)
        .filter

com.example.app.himalayafmproject" /> <activity android:name=".MainActivity"> <intent-filter

<activityandroid:name”.SecondActivity”><intent-filter><actionname=”com.sunofbeaches.LOGIN_INFO

2.2.2'}添加权限<uses-featureandroid:name="android.hardware.usb.host"/>在res/xml/下添加device_filter.xml

supportsRtl="true"android:theme="@style/AppTheme"><activityandroid:name=".MainActivity"><intent-filter

也还是需要循环两次personList才能得到最终的结果，性能和方案1其实差不多，只不过代码看着会比较简洁）//方案3valteacherList2:List<Person>=personList.filter

HeaderWriterFilter.java:77)~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]atorg.springframework.web.filter.OncePerRequestFilter.doFilter

blue.BluetoothListenerService"android:enabled="true"android:exported="true"><intent-filter

等，<activityandroid:name=".MainActivity"android:exported="true"><intent-filter

android:name=".SDCardDemoActivity" android:exported="true"> <intent-filter

读取自动授权"android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"><intent-filter

superFile>filter,RenameInterfacerenameInterface){if(filter==null){System.out.println("======&

serviceandroid:name=".HelloService"></service><receiverandroid:name=".HelloWorld"><intent-filter

com.android.settings.deviceinfo.Status" android:label="@string/status_title"> <intent-filter

--具备短信默认应用条件1--><intent-filter><actionandroid:name="android.intent.action.SEND"

RichEditorActivity"android:windowSoftInputMode="stateHidden|adjustPan"><intent-filter