深海游弋的鱼 – 默默的点滴

把系统从Struts2 迁移到 Spring MVC六大步总结

基于struts的系统迁移到SpringMVC架构上来，共分六部曲，让系统一部一部迁移过来，本文讲的知识点以Struts2 to Spring4，但是针对其他应用场景也是可以参考的。

Step 1: 替换基本的框架库。

Firstly while migrating from struts to spring we have to replace our struts related libraries with spring libraries in lib folder.

I have mentioned basic libraries of both struts and spring for your clarification.

Struts basic libraries :

struts.jar
struts-legacy.jar
etc..

Have you ever use : Javadoc comment in Java

Spring basic libraries :

standard.jar
org.springframework.asm-4.0.1.RELEASE-A.jar
org.springframework.beans-4.0.1.RELEASE-A.jar
org.springframework.context-4.0.1.RELEASE-A.jar
org.springframework.core-4.0.1.RELEASE-A.jar
org.springframework.expression-4.0.1.RELEASE-A.jar
org.springframework.web.servlet-4.0.1.RELEASE-A.jar
org.springframework.web-4.0.1.RELEASE-A.jar
etc..

Step 2: 修改web.xml配置文件

In this step we have to remove Action filter dispatcher for the web.xml and add Spring dipatcher servlet as Front controller
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In Strut application web.xml look like as follows

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">  
  <display-name>Struts2MyFirstApp</display-name>  
  <filter>  
        <filter-name>struts2</filter-name>  
        <filter-class>  
            org.apache.struts2.dispatcher.FilterDispatcher  
        </filter-class>  
    </filter>  

<filter-mapping>  
        <filter-name>struts2</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  
    <welcome-file-list>  
        <welcome-file>Login.jsp</welcome-file>  
    </welcome-file-list>  
</web-app>

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">

<display-name>Struts2MyFirstApp</display-name>

<filter-name>struts2</filter-name>

<filter-class>

org.apache.struts2.dispatcher.FilterDispatcher

</filter-class>

</filter>

<filter-mapping>

<filter-name>struts2</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<welcome-file-list>

<welcome-file>Login.jsp</welcome-file>

</welcome-file-list>

</web-app>

In Spring application web.xml look like as follows

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">  
  <display-name>dispatcher</display-name>  
  <servlet>  
    <servlet-name>dispatcher</servlet-name>  
    <servlet-class>  
            org.springframework.web.servlet.DispatcherServlet  
        </servlet-class>  
    <load-on-startup>1</load-on-startup>  
  </servlet>  
  <servlet-mapping>  
    <servlet-name>dispatcher</servlet-name>  
    <url-pattern>/</url-pattern>  
  </servlet-mapping>  
</web-app>

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">

<display-name>dispatcher</display-name>

<servlet-name>dispatcher</servlet-name>

<servlet-class>

org.springframework.web.servlet.DispatcherServlet

</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>dispatcher</servlet-name>

<url-pattern>/</url-pattern>

</servlet-mapping>

</web-app>

Step 3: 替换Struts本身的配置文件

Now replace all struts configuration files to spring configuration file as follows

In Struts applivation struts configuration file-

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE struts PUBLIC  
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"  
    "http://struts.apache.org/dtds/struts-2.0.dtd">  
   
<struts>  
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />  
    <constant name="struts.devMode" value="false" />  
    <constant name="struts.custom.i18n.resources" value="myapp" />  
   
    <package name="default" extends="struts-default" namespace="/">  
        <action name="login" class="com.geekonjavaonjava.struts2.login.LoginAction">  
            <result name="success">Welcome.jsp</result>  
            <result name="error">Login.jsp</result>  
        </action>  
    </package>  
</struts>

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd">

<result name="success">Welcome.jsp</result>

<result name="error">Login.jsp</result>

</action>

</package>

</struts>

In Spring application spring configuration file as follows

<?xml version="1.0" encoding="UTF-8"?>    
<beans xmlns="http://www.springframework.org/schema/beans"    
     xmlns:context="http://www.springframework.org/schema/context"    
     xmlns:p="http://www.springframework.org/schema/p"      
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    
     xsi:schemaLocation="http://www.springframework.org/schema/beans    
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd    
    http://www.springframework.org/schema/context    
    http://www.springframework.org/schema/context/spring-context-4.0.xsd">    
        
     <context:component-scan base-package="com.geekonjavaonjava.spring.login.controller" />    
        
     <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">    
        <property name="prefix">    
          <value>/WEB-INF/views/</value>    
        </property>    
        <property name="suffix">    
          <value>.jsp</value>    
        </property>    
      </bean>    
</beans>

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-4.0.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-4.0.xsd">

<context:component-scan base-package="com.geekonjavaonjava.spring.login.controller" />

<value>/WEB-INF/views/</value>

</property>

</property>

</bean>

</beans>

Here, <context:component-scan> tag is used, so that spring will load all the components from given package i.e. " com.geekonjavaonjava.spring.login.controller".

Use this in Struts2 : Get value of struts property tag into jsp variable

We can use different view resolver, here I have used InternalResourceViewResolver. In which prefix and suffix are used to resolve the view by prefixing and suffixing values to the object returned by ModelAndView in action class.

Step 4: 修改JSP文件

While migration an application from struts to spring we need to change in jsp file as following

Firstly replace all tlds-

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>  
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>  
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>  
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>

<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>

<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>

<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>

Replace these with following spring taglib's :

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>  
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>

1 2	<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%> <%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>

In Struts :

<html:form action="/addLogin" method="post">

1	<html:form action="/addLogin" method="post">

In Spring :

<form:form method="POST" commandName="loginForm" name="loginForm" action="login.do">

1	<form:form method="POST" commandName="loginForm" name="loginForm" action="login.do">

Here commandName is going to map with corresponding formbean for that jsp. Next we will see, how action is getting called with spring 4 annotations.

Step 5: 修改Action 类文件

Now following changes need to be done in action classes for struts to spring migration using annotations-

Struts Action:

package com.geekonjavaonjava.struts2.login;  
  
import com.opensymphony.xwork2.ActionSupport;  
  
/** 
 * @author geekonjava 
 * 
 */  
@SuppressWarnings("serial")  
public class LoginAction  extends ActionSupport{  
 private String username;  
    private String password;  
      
 public String execute() {  
     
        if (this.username.equals("geekonjava")   
                && this.password.equals("sweety")) {  
            return "success";  
        } else {  
         addActionError(getText("error.login"));  
            return "error";  
        }  
    }  
  
 public String getUsername() {  
  return username;  
 }  
  
 public void setUsername(String username) {  
  this.username = username;  
 }  
  
 public String getPassword() {  
  return password;  
 }  
  
 public void setPassword(String password) {  
  this.password = password;  
 }  
   
}

package com.geekonjavaonjava.struts2.login;

import com.opensymphony.xwork2.ActionSupport;

/**

* @author geekonjava

@SuppressWarnings("serial")

public class LoginAction extends ActionSupport{

private String username;

private String password;

public String execute() {

if (this.username.equals("geekonjava")

&& this.password.equals("sweety")) {

return "success";

} else {

addActionError(getText("error.login"));

return "error";

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

Spring action

package com.geekonjavaonjava.spring.login.controller;  
  
import org.springframework.stereotype.Controller;  
import org.springframework.ui.ModelMap;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestMethod;  
  
/** 
 * @author GeekOnJava 
 * 
 */  
@Controller  
public class LoginController {  
   
 @RequestMapping(value="/login.do", method = RequestMethod.GET)  
 public String doLogin(ModelMap model, LoginForm loginForn) {  
 if (this.username.equals("geekonjava")   
                && this.password.equals("sweety")) {  
            model.addAttribute("message", "Login Success");  
        } else {  
            model.addAttribute("message", "Login Failure");  
        }  
         return "home";  
   
 }  
}

package com.geekonjavaonjava.spring.login.controller;

import org.springframework.stereotype.Controller;

import org.springframework.ui.ModelMap;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

/**

* @author GeekOnJava

@Controller

public class LoginController {

@RequestMapping(value="/login.do", method = RequestMethod.GET)

public String doLogin(ModelMap model, LoginForm loginForn) {

if (this.username.equals("geekonjava")

&& this.password.equals("sweety")) {

model.addAttribute("message", "Login Success");

} else {

model.addAttribute("message", "Login Failure");

}

return "home";

}

Step 6: 修改前端验证机制

In struts JSP file validation changes as follows

<% ActionErrors actionErrors = (ActionErrors)request.getAttribute("org.apache.struts.action.ERROR"); %>

1	<% ActionErrors actionErrors = (ActionErrors)request.getAttribute("org.apache.struts.action.ERROR"); %>

In Spring JSP file as follows-

<form:errors path="*" cssClass="error" />

1	<form:errors path="*" cssClass="error" />

参考链接

Android: 通过Intent筛选多种类型文件

一般使用setType()方法来实现文件过滤，如：只显示PDF文件：

     int requestCode = 100;
     Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
     intent.setType("application/pdf");
     intent.addCategory(Intent.CATEGORY_OPENABLE);
     startActivityForResult(intent, requestCode);

int requestCode = 100;

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

intent.setType("application/pdf");

intent.addCategory(Intent.CATEGORY_OPENABLE);

startActivityForResult(intent, requestCode);

但如果要指定多种类型呢，同时要指定pdf,excel,word,ppt这些类型的文件，那要怎样设置呢？

指定多种类型文件

在网上查了，有些答案是

错误方式1——setType中进行拼接：

intent.setType(“video/*;image/*”);//同时选择视频和图片

1	intent.setType(“video/;image/”);//同时选择视频和图片

错误方式2——调用多次setType：

intent.setType("video/*");
intent.setType("image/*");

1 2	intent.setType("video/"); intent.setType("image/");

这两种方式都是错误的

我们看下源码

/**
     * Set an explicit MIME data type.
     *
     * <p>This is used to create intents that only specify a type and not data,
     * for example to indicate the type of data to return.
     *
     * <p>This method automatically clears any data that was
     * previously set (for example by {@link #setData}).
     *
     * <p><em>Note: MIME type matching in the Android framework is
     * case-sensitive, unlike formal RFC MIME types.  As a result,
     * you should always write your MIME types with lower case letters,
     * or use {@link #normalizeMimeType} or {@link #setTypeAndNormalize}
     * to ensure that it is converted to lower case.</em>
     *
     * @param type The MIME type of the data being handled by this intent.
     *
     * @return Returns the same Intent object, for chaining multiple calls
     * into a single statement.
     *
     * @see #getType
     * @see #setTypeAndNormalize
     * @see #setDataAndType
     * @see #normalizeMimeType
     */
    public Intent setType(String type) {
        mData = null;
        mType = type;
        return this;
    }

/**

* Set an explicit MIME data type.

* This is used to create intents that only specify a type and not data,

* for example to indicate the type of data to return.

* This method automatically clears any data that was

* previously set (for example by {@link #setData}).

* Note: MIME type matching in the Android framework is

* case-sensitive, unlike formal RFC MIME types. As a result,

* you should always write your MIME types with lower case letters,

* or use {@link #normalizeMimeType} or {@link #setTypeAndNormalize}

* to ensure that it is converted to lower case.

* @param type The MIME type of the data being handled by this intent.

* @return Returns the same Intent object, for chaining multiple calls

* into a single statement.

* @see #getType

* @see #setTypeAndNormalize

* @see #setDataAndType

* @see #normalizeMimeType

public Intent setType(String type) {

mData = null;

mType = type;

return this;

}

我们可以看到，setType每次都是重新赋值，没有添加到list和数组中，因此这两种方式是实现不了指定多种类型文件的。
既然这种方式实现不了，那么Intent会不会提供字段以便我们传递过滤数据，我们通过官方文档及源码，发现Intent提供了EXTRA_MIME_TYPES这个字段来传递，而且是数组类型：

/**
     * Extra used to communicate a set of acceptable MIME types. The type of the
     * extra is {@code String[]}. Values may be a combination of concrete MIME
     * types (such as "image/png") and/or partial MIME types (such as
     * "audio/*").
     *
     * @see #ACTION_GET_CONTENT
     * @see #ACTION_OPEN_DOCUMENT
     */
    public static final String EXTRA_MIME_TYPES = "android.intent.extra.MIME_TYPES";

/**

* Extra used to communicate a set of acceptable MIME types. The type of the

* extra is {@code String[]}. Values may be a combination of concrete MIME

* types (such as "image/png") and/or partial MIME types (such as

* "audio/*").

* @see #ACTION_GET_CONTENT

* @see #ACTION_OPEN_DOCUMENT

public static final String EXTRA_MIME_TYPES = "android.intent.extra.MIME_TYPES";

因此结果就简单了,我们要指定ppt,word,excel,pdf类型的文件，代码如下

public static void openDirChooseFile(Activity activity, int requestCode, String[] mimeTypes) {
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        if (mimeTypes != null) {
            intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes);
        }
        intent.setType("*/*");
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        // intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);//多选
        activity.startActivityForResult(intent, requestCode);
    }
 public static void chooseFile(Activity activity, int requestCode) {
        String[] mimeTypes = {MimeType.DOC, MimeType.DOCX, MimeType.PDF, MimeType.PPT, MimeType.PPTX, MimeType.XLS, MimeType.XLSX};
        FileUtil.openDirChooseFile(activity, requestCode, mimeTypes);
    }

public static void openDirChooseFile(Activity activity, int requestCode, String[] mimeTypes) {

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

if (mimeTypes != null) {

intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes);

}

intent.setType("*/*");

intent.addCategory(Intent.CATEGORY_OPENABLE);

// intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);//多选

activity.startActivityForResult(intent, requestCode);

}

public static void chooseFile(Activity activity, int requestCode) {

String[] mimeTypes = {MimeType.DOC, MimeType.DOCX, MimeType.PDF, MimeType.PPT, MimeType.PPTX, MimeType.XLS, MimeType.XLSX};

FileUtil.openDirChooseFile(activity, requestCode, mimeTypes);

}

MimeType文件

public class MimeType {
    public static final String DOC = "application/msword";
    public static final String DOCX = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
    public static final String XLS = "application/vnd.ms-excel application/x-excel";
    public static final String XLSX = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
    public static final String PPT = "application/vnd.ms-powerpoint";
    public static final String PPTX = "application/vnd.openxmlformats-officedocument.presentationml.presentation";
    public static final String PDF = "application/pdf";
}

public class MimeType {

public static final String DOC = "application/msword";

public static final String DOCX = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";

public static final String XLS = "application/vnd.ms-excel application/x-excel";

public static final String XLSX = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

public static final String PPT = "application/vnd.ms-powerpoint";

public static final String PPTX = "application/vnd.openxmlformats-officedocument.presentationml.presentation";

public static final String PDF = "application/pdf";

}

Intent指定多种类型的文件，正确的做法，是通过Intent.EXTRA_MIME_TYPES传递Mime类型数组实现

 intent.setType("*/*");
 intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes);

1 2	intent.setType("/"); intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes);

MimeType 文件列表参考

1. Mozilla MDN Web Docs: https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types

扩展名	文档类型	MIME 类型
.aac	AAC audio	audio/aac
.abw	AbiWord document	application/x-abiword
.arc	Archive document (multiple files embedded)	application/x-freearc
.avi	AVI: Audio Video Interleave	video/x-msvideo
.azw	Amazon Kindle eBook format	application/vnd.amazon.ebook
.bin	Any kind of binary data	application/octet-stream
.bmp	Windows OS/2 Bitmap Graphics	image/bmp
.bz	BZip archive	application/x-bzip
.bz2	BZip2 archive	application/x-bzip2
.csh	C-Shell script	application/x-csh
.css	Cascading Style Sheets (CSS)	text/css
.csv	Comma-separated values (CSV)	text/csv
.doc	Microsoft Word	application/msword
.docx	Microsoft Word (OpenXML)	application/vnd.openxmlformats-officedocument.wordprocessingml.document
.eot	MS Embedded OpenType fonts	application/vnd.ms-fontobject
.epub	Electronic publication (EPUB)	application/epub+zip
.gif	Graphics Interchange Format (GIF)	image/gif
.htm .html	HyperText Markup Language (HTML)	text/html
.ico	Icon format	image/vnd.microsoft.icon
.ics	iCalendar format	text/calendar
.jar	Java Archive (JAR)	application/java-archive
.jpeg .jpg	JPEG images	image/jpeg
.js	JavaScript	text/javascript
.json	JSON format	application/json
.jsonld	JSON-LD format	application/ld+json
.mid .midi	Musical Instrument Digital Interface (MIDI)	audio/midi audio/x-midi
.mjs	JavaScript module	text/javascript
.mp3	MP3 audio	audio/mpeg
.mpeg	MPEG Video	video/mpeg
.mpkg	Apple Installer Package	application/vnd.apple.installer+xml
.odp	OpenDocument presentation document	application/vnd.oasis.opendocument.presentation
.ods	OpenDocument spreadsheet document	application/vnd.oasis.opendocument.spreadsheet
.odt	OpenDocument text document	application/vnd.oasis.opendocument.text
.oga	OGG audio	audio/ogg
.ogv	OGG video	video/ogg
.ogx	OGG	application/ogg
.otf	OpenType font	font/otf
.png	Portable Network Graphics	image/png
.pdf	Adobe Portable Document Format (PDF)	application/pdf
.ppt	Microsoft PowerPoint	application/vnd.ms-powerpoint
.pptx	Microsoft PowerPoint (OpenXML)	application/vnd.openxmlformats-officedocument.presentationml.presentation
.rar	RAR archive	application/x-rar-compressed
.rtf	Rich Text Format (RTF)	application/rtf
.sh	Bourne shell script	application/x-sh
.svg	Scalable Vector Graphics (SVG)	image/svg+xml
.swf	Small web format (SWF) or Adobe Flash document	application/x-shockwave-flash
.tar	Tape Archive (TAR)	application/x-tar
.tif .tiff	Tagged Image File Format (TIFF)	image/tiff
.ttf	TrueType Font	font/ttf
.txt	Text, (generally ASCII or ISO 8859-n)	text/plain
.vsd	Microsoft Visio	application/vnd.visio
.wav	Waveform Audio Format	audio/wav
.weba	WEBM audio	audio/webm
.webm	WEBM video	video/webm
.webp	WEBP image	image/webp
.woff	Web Open Font Format (WOFF)	font/woff
.woff2	Web Open Font Format (WOFF)	font/woff2
.xhtml	XHTML	application/xhtml+xml
.xls	Microsoft Excel	application/vnd.ms-excel
.xlsx	Microsoft Excel (OpenXML)	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.xml	XML	application/xml 代码对普通用户来说不可读 (RFC 3023, section 3) text/xml 代码对普通用户来说可读 (RFC 3023, section 3)
.xul	XUL	application/vnd.mozilla.xul+xml
.zip	ZIP archive	application/zip
.3gp	3GPP audio/video container	video/3gpp audio/3gpp（若不含视频）
.3g2	3GPP2 audio/video container	video/3gpp2 audio/3gpp2（若不含视频）
.7z	7-zip archive	application/x-7z-compressed

2. AOSP MediaFle:

    public static String getMimeTypeForFile(String path) {
        MediaFileType mediaFileType = getFileType(path);
        return (mediaFileType == null ? null : mediaFileType.mimeType);
    }

public static String getMimeTypeForFile(String path) {

MediaFileType mediaFileType = getFileType(path);

return (mediaFileType == null ? null : mediaFileType.mimeType);

}

    static {
        /// M: Add more audio file types to maps. {@
        addFileType("3GP", FILE_TYPE_3GPP3, "audio/3gpp");
        addFileType("3GA", FILE_TYPE_3GA, "audio/3gpp");
        addFileType("MOV", FILE_TYPE_QUICKTIME_AUDIO, "audio/quicktime");
        addFileType("QT", FILE_TYPE_QUICKTIME_AUDIO, "audio/quicktime");
        /// Add to support Apple Lossless Codec(audio/alac)
        addFileType("CAF", FILE_TYPE_CAF, "audio/alac");
        /// Add to support PCM(audio/wav)
        addFileType("WAV", FILE_TYPE_WAV, "audio/wav", MtpConstants.FORMAT_WAV);
        addFileType("OGG", FILE_TYPE_OGG, "audio/vorbis", MtpConstants.FORMAT_OGG);
        addFileType("OGG", FILE_TYPE_OGG, "audio/webm", MtpConstants.FORMAT_OGG);
        /// Add to support MP2, first add video/mp2p, so that use MP2 can return as audio type
        addFileType("MP2", FILE_TYPE_MP2PS, "video/mp2p");
        addFileType("MP2", FILE_TYPE_MP2, "audio/mpeg");
        /// Add to support Monkey's Audio APE(audio/ape)
        if (SystemProperties.getBoolean("ro.mtk_audio_ape_support", false)) {
            addFileType("APE", FILE_TYPE_APE, "audio/ape");
        }
        /// Add to support OMA DRM audio type DCF
        if (SystemProperties.getBoolean("ro.mtk_oma_drm_support", false)) {
            addFileType("DCF", FILE_TYPE_MP3, "audio/mpeg");
        }
        /// @}

        addFileType("MP3", FILE_TYPE_MP3, "audio/mpeg", MtpConstants.FORMAT_MP3);
        addFileType("MPGA", FILE_TYPE_MP3, "audio/mpeg", MtpConstants.FORMAT_MP3);
        addFileType("M4A", FILE_TYPE_M4A, "audio/mp4", MtpConstants.FORMAT_MPEG);
        addFileType("WAV", FILE_TYPE_WAV, "audio/x-wav", MtpConstants.FORMAT_WAV);
        addFileType("AMR", FILE_TYPE_AMR, "audio/amr");
        addFileType("AWB", FILE_TYPE_AWB, "audio/amr-wb");
        if (isWMAEnabled()) {
            addFileType("WMA", FILE_TYPE_WMA, "audio/x-ms-wma", MtpConstants.FORMAT_WMA);
        }
        addFileType("OGG", FILE_TYPE_OGG, "audio/ogg", MtpConstants.FORMAT_OGG);
        addFileType("OGG", FILE_TYPE_OGG, "application/ogg", MtpConstants.FORMAT_OGG);
        addFileType("OGA", FILE_TYPE_OGG, "application/ogg", MtpConstants.FORMAT_OGG);
        addFileType("AAC", FILE_TYPE_AAC, "audio/aac", MtpConstants.FORMAT_AAC);
        addFileType("AAC", FILE_TYPE_AAC, "audio/aac-adts", MtpConstants.FORMAT_AAC);
        addFileType("MKA", FILE_TYPE_MKA, "audio/x-matroska");

        addFileType("MID", FILE_TYPE_MID, "audio/midi");
        addFileType("MIDI", FILE_TYPE_MID, "audio/midi");
        addFileType("XMF", FILE_TYPE_MID, "audio/midi");
        addFileType("RTTTL", FILE_TYPE_MID, "audio/midi");
        addFileType("SMF", FILE_TYPE_SMF, "audio/sp-midi");
        addFileType("IMY", FILE_TYPE_IMY, "audio/imelody");
        addFileType("RTX", FILE_TYPE_MID, "audio/midi");
        addFileType("OTA", FILE_TYPE_MID, "audio/midi");
        addFileType("MXMF", FILE_TYPE_MID, "audio/midi");

        /// M: Add more video file types to maps. {@
        addFileType("MTS", FILE_TYPE_MP2TS, "video/mp2ts");
        addFileType("M2TS", FILE_TYPE_MP2TS, "video/mp2ts");
        addFileType("MOV", FILE_TYPE_QUICKTIME_VIDEO, "video/quicktime");
        addFileType("QT", FILE_TYPE_QUICKTIME_VIDEO, "video/quicktime");
        addFileType("OGV", FILE_TYPE_OGM, "video/ogm");
        addFileType("OGM", FILE_TYPE_OGM, "video/ogm");
        if (SystemProperties.getBoolean("ro.mtk_flv_playback_support", false)) {
            addFileType("FLV", FILE_TYPE_FLV, "video/x-flv");
            addFileType("F4V", FILE_TYPE_FLV, "video/x-flv");
            addFileType("PFV", FILE_TYPE_FLV, "video/x-flv");
            addFileType("FLA", FILE_TYPE_FLA, "audio/x-flv");
        }
        if (SystemProperties.getBoolean("ro.mtk_mtkps_playback_support", false)) {
            addFileType("PS", FILE_TYPE_MP2PS, "video/mp2p");
            /// Only support VOB when mtkps feature option is enabled
            addFileType("VOB", FILE_TYPE_MP2PS, "video/mp2p");
            /// DAT files should not be scanned as mpeg2 PS if PS is not supported.
            addFileType("DAT", FILE_TYPE_MP2PS, "video/mp2p");
        }
        /// @}

        addFileType("MPEG", FILE_TYPE_MP4, "video/mpeg", MtpConstants.FORMAT_MPEG);
        addFileType("MPG", FILE_TYPE_MP4, "video/mpeg", MtpConstants.FORMAT_MPEG);
        addFileType("MP4", FILE_TYPE_MP4, "video/mp4", MtpConstants.FORMAT_MPEG);
        addFileType("M4V", FILE_TYPE_M4V, "video/mp4", MtpConstants.FORMAT_MPEG);
        addFileType("3GP", FILE_TYPE_3GPP, "video/3gpp",  MtpConstants.FORMAT_3GP_CONTAINER);
        addFileType("3GPP", FILE_TYPE_3GPP, "video/3gpp", MtpConstants.FORMAT_3GP_CONTAINER);
        addFileType("3G2", FILE_TYPE_3GPP2, "video/3gpp2", MtpConstants.FORMAT_3GP_CONTAINER);
        addFileType("3GPP2", FILE_TYPE_3GPP2, "video/3gpp2", MtpConstants.FORMAT_3GP_CONTAINER);
        addFileType("MKV", FILE_TYPE_MKV, "video/x-matroska");
        addFileType("WEBM", FILE_TYPE_WEBM, "video/webm");
        addFileType("TS", FILE_TYPE_MP2TS, "video/mp2ts");
        addFileType("AVI", FILE_TYPE_AVI, "video/avi");

        if (isWMVEnabled()) {
            addFileType("WMV", FILE_TYPE_WMV, "video/x-ms-wmv", MtpConstants.FORMAT_WMV);
            addFileType("ASF", FILE_TYPE_ASF, "video/x-ms-asf");
        }

        /// M: Add more image file types to maps. {@
        if (!SystemProperties.getBoolean("ro.mtk_bsp_package", false)) {
            /// Mpo files should not be scanned as images in BSP
            addFileType("MPO", FILE_TYPE_MPO, "image/mpo");
        }
        /// @}

        addFileType("JPG", FILE_TYPE_JPEG, "image/jpeg", MtpConstants.FORMAT_EXIF_JPEG);
        addFileType("JPEG", FILE_TYPE_JPEG, "image/jpeg", MtpConstants.FORMAT_EXIF_JPEG);
        addFileType("GIF", FILE_TYPE_GIF, "image/gif", MtpConstants.FORMAT_GIF);
        addFileType("PNG", FILE_TYPE_PNG, "image/png", MtpConstants.FORMAT_PNG);
        addFileType("BMP", FILE_TYPE_BMP, "image/x-ms-bmp", MtpConstants.FORMAT_BMP);
        addFileType("WBMP", FILE_TYPE_WBMP, "image/vnd.wap.wbmp");
        addFileType("WEBP", FILE_TYPE_WEBP, "image/webp");

        addFileType("M3U", FILE_TYPE_M3U, "audio/x-mpegurl", MtpConstants.FORMAT_M3U_PLAYLIST);
        addFileType("M3U", FILE_TYPE_M3U, "application/x-mpegurl", MtpConstants.FORMAT_M3U_PLAYLIST);
        addFileType("PLS", FILE_TYPE_PLS, "audio/x-scpls", MtpConstants.FORMAT_PLS_PLAYLIST);
        addFileType("WPL", FILE_TYPE_WPL, "application/vnd.ms-wpl", MtpConstants.FORMAT_WPL_PLAYLIST);
        addFileType("M3U8", FILE_TYPE_HTTPLIVE, "application/vnd.apple.mpegurl");
        addFileType("M3U8", FILE_TYPE_HTTPLIVE, "audio/mpegurl");
        addFileType("M3U8", FILE_TYPE_HTTPLIVE, "audio/x-mpegurl");

        addFileType("FL", FILE_TYPE_FL, "application/x-android-drm-fl");

        addFileType("TXT", FILE_TYPE_TEXT, "text/plain", MtpConstants.FORMAT_TEXT);
        addFileType("HTM", FILE_TYPE_HTML, "text/html", MtpConstants.FORMAT_HTML);
        addFileType("HTML", FILE_TYPE_HTML, "text/html", MtpConstants.FORMAT_HTML);
        addFileType("PDF", FILE_TYPE_PDF, "application/pdf");
        addFileType("DOC", FILE_TYPE_MS_WORD, "application/msword", MtpConstants.FORMAT_MS_WORD_DOCUMENT);
        addFileType("XLS", FILE_TYPE_MS_EXCEL, "application/vnd.ms-excel", MtpConstants.FORMAT_MS_EXCEL_SPREADSHEET);
        addFileType("PPT", FILE_TYPE_MS_POWERPOINT, "application/vnd.ms-powerpoint", MtpConstants.FORMAT_MS_POWERPOINT_PRESENTATION);
        addFileType("FLAC", FILE_TYPE_FLAC, "audio/flac", MtpConstants.FORMAT_FLAC);
        addFileType("ZIP", FILE_TYPE_ZIP, "application/zip");
        addFileType("MPG", FILE_TYPE_MP2PS, "video/mp2p");
        addFileType("MPEG", FILE_TYPE_MP2PS, "video/mp2p");

        /// M: Add more Other popular file types to maps. {@
        addFileType("ICS", FILE_TYPE_ICS, "text/calendar");
        addFileType("ICZ", FILE_TYPE_ICZ, "text/calendar");
        addFileType("VCF", FILE_TYPE_VCF, "text/x-vcard");
        addFileType("VCS", FILE_TYPE_VCS, "text/x-vcalendar");
        addFileType("APK", FILE_TYPE_APK, "application/vnd.android.package-archive");
        addFileType("DOCX", FILE_TYPE_MS_WORD, "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
        addFileType("DOTX", FILE_TYPE_MS_WORD, "application/vnd.openxmlformats-officedocument.wordprocessingml.template");
        addFileType("XLSX", FILE_TYPE_MS_EXCEL, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        addFileType("XLTX", FILE_TYPE_MS_EXCEL, "application/vnd.openxmlformats-officedocument.spreadsheetml.template");
        addFileType("PPTX", FILE_TYPE_MS_POWERPOINT, "application/vnd.openxmlformats-officedocument.presentationml.presentation");
        addFileType("POTX", FILE_TYPE_MS_POWERPOINT, "application/vnd.openxmlformats-officedocument.presentationml.template");
        addFileType("PPSX", FILE_TYPE_MS_POWERPOINT, "application/vnd.openxmlformats-officedocument.presentationml.slideshow");
        /// @}
    }

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static {

/// M: Add more audio file types to maps. {@

addFileType("3GP", FILE_TYPE_3GPP3, "audio/3gpp");

addFileType("3GA", FILE_TYPE_3GA, "audio/3gpp");

addFileType("MOV", FILE_TYPE_QUICKTIME_AUDIO, "audio/quicktime");

addFileType("QT", FILE_TYPE_QUICKTIME_AUDIO, "audio/quicktime");

/// Add to support Apple Lossless Codec(audio/alac)

addFileType("CAF", FILE_TYPE_CAF, "audio/alac");

/// Add to support PCM(audio/wav)

addFileType("WAV", FILE_TYPE_WAV, "audio/wav", MtpConstants.FORMAT_WAV);

addFileType("OGG", FILE_TYPE_OGG, "audio/vorbis", MtpConstants.FORMAT_OGG);

addFileType("OGG", FILE_TYPE_OGG, "audio/webm", MtpConstants.FORMAT_OGG);

/// Add to support MP2, first add video/mp2p, so that use MP2 can return as audio type

addFileType("MP2", FILE_TYPE_MP2PS, "video/mp2p");

addFileType("MP2", FILE_TYPE_MP2, "audio/mpeg");

/// Add to support Monkey's Audio APE(audio/ape)

if (SystemProperties.getBoolean("ro.mtk_audio_ape_support", false)) {

addFileType("APE", FILE_TYPE_APE, "audio/ape");

}

/// Add to support OMA DRM audio type DCF

if (SystemProperties.getBoolean("ro.mtk_oma_drm_support", false)) {

addFileType("DCF", FILE_TYPE_MP3, "audio/mpeg");

}

/// @}

addFileType("MP3", FILE_TYPE_MP3, "audio/mpeg", MtpConstants.FORMAT_MP3);

addFileType("MPGA", FILE_TYPE_MP3, "audio/mpeg", MtpConstants.FORMAT_MP3);

addFileType("M4A", FILE_TYPE_M4A, "audio/mp4", MtpConstants.FORMAT_MPEG);

addFileType("WAV", FILE_TYPE_WAV, "audio/x-wav", MtpConstants.FORMAT_WAV);

addFileType("AMR", FILE_TYPE_AMR, "audio/amr");

addFileType("AWB", FILE_TYPE_AWB, "audio/amr-wb");

if (isWMAEnabled()) {

addFileType("WMA", FILE_TYPE_WMA, "audio/x-ms-wma", MtpConstants.FORMAT_WMA);

}

addFileType("OGG", FILE_TYPE_OGG, "audio/ogg", MtpConstants.FORMAT_OGG);

addFileType("OGG", FILE_TYPE_OGG, "application/ogg", MtpConstants.FORMAT_OGG);

addFileType("OGA", FILE_TYPE_OGG, "application/ogg", MtpConstants.FORMAT_OGG);

addFileType("AAC", FILE_TYPE_AAC, "audio/aac", MtpConstants.FORMAT_AAC);

addFileType("AAC", FILE_TYPE_AAC, "audio/aac-adts", MtpConstants.FORMAT_AAC);

addFileType("MKA", FILE_TYPE_MKA, "audio/x-matroska");

addFileType("MID", FILE_TYPE_MID, "audio/midi");

addFileType("MIDI", FILE_TYPE_MID, "audio/midi");

addFileType("XMF", FILE_TYPE_MID, "audio/midi");

addFileType("RTTTL", FILE_TYPE_MID, "audio/midi");

addFileType("SMF", FILE_TYPE_SMF, "audio/sp-midi");

addFileType("IMY", FILE_TYPE_IMY, "audio/imelody");

addFileType("RTX", FILE_TYPE_MID, "audio/midi");

addFileType("OTA", FILE_TYPE_MID, "audio/midi");

addFileType("MXMF", FILE_TYPE_MID, "audio/midi");

/// M: Add more video file types to maps. {@

addFileType("MTS", FILE_TYPE_MP2TS, "video/mp2ts");

addFileType("M2TS", FILE_TYPE_MP2TS, "video/mp2ts");

addFileType("MOV", FILE_TYPE_QUICKTIME_VIDEO, "video/quicktime");

addFileType("QT", FILE_TYPE_QUICKTIME_VIDEO, "video/quicktime");

addFileType("OGV", FILE_TYPE_OGM, "video/ogm");

addFileType("OGM", FILE_TYPE_OGM, "video/ogm");

if (SystemProperties.getBoolean("ro.mtk_flv_playback_support", false)) {

addFileType("FLV", FILE_TYPE_FLV, "video/x-flv");

addFileType("F4V", FILE_TYPE_FLV, "video/x-flv");

addFileType("PFV", FILE_TYPE_FLV, "video/x-flv");

addFileType("FLA", FILE_TYPE_FLA, "audio/x-flv");

}

if (SystemProperties.getBoolean("ro.mtk_mtkps_playback_support", false)) {

addFileType("PS", FILE_TYPE_MP2PS, "video/mp2p");

/// Only support VOB when mtkps feature option is enabled

addFileType("VOB", FILE_TYPE_MP2PS, "video/mp2p");

/// DAT files should not be scanned as mpeg2 PS if PS is not supported.

addFileType("DAT", FILE_TYPE_MP2PS, "video/mp2p");

}

/// @}

addFileType("MPEG", FILE_TYPE_MP4, "video/mpeg", MtpConstants.FORMAT_MPEG);

addFileType("MPG", FILE_TYPE_MP4, "video/mpeg", MtpConstants.FORMAT_MPEG);

addFileType("MP4", FILE_TYPE_MP4, "video/mp4", MtpConstants.FORMAT_MPEG);

addFileType("M4V", FILE_TYPE_M4V, "video/mp4", MtpConstants.FORMAT_MPEG);

addFileType("3GP", FILE_TYPE_3GPP, "video/3gpp", MtpConstants.FORMAT_3GP_CONTAINER);

addFileType("3GPP", FILE_TYPE_3GPP, "video/3gpp", MtpConstants.FORMAT_3GP_CONTAINER);

addFileType("3G2", FILE_TYPE_3GPP2, "video/3gpp2", MtpConstants.FORMAT_3GP_CONTAINER);

addFileType("3GPP2", FILE_TYPE_3GPP2, "video/3gpp2", MtpConstants.FORMAT_3GP_CONTAINER);

addFileType("MKV", FILE_TYPE_MKV, "video/x-matroska");

addFileType("WEBM", FILE_TYPE_WEBM, "video/webm");

addFileType("TS", FILE_TYPE_MP2TS, "video/mp2ts");

addFileType("AVI", FILE_TYPE_AVI, "video/avi");

if (isWMVEnabled()) {

addFileType("WMV", FILE_TYPE_WMV, "video/x-ms-wmv", MtpConstants.FORMAT_WMV);

addFileType("ASF", FILE_TYPE_ASF, "video/x-ms-asf");

}

/// M: Add more image file types to maps. {@

if (!SystemProperties.getBoolean("ro.mtk_bsp_package", false)) {

/// Mpo files should not be scanned as images in BSP

addFileType("MPO", FILE_TYPE_MPO, "image/mpo");

}

/// @}

addFileType("JPG", FILE_TYPE_JPEG, "image/jpeg", MtpConstants.FORMAT_EXIF_JPEG);

addFileType("JPEG", FILE_TYPE_JPEG, "image/jpeg", MtpConstants.FORMAT_EXIF_JPEG);

addFileType("GIF", FILE_TYPE_GIF, "image/gif", MtpConstants.FORMAT_GIF);

addFileType("PNG", FILE_TYPE_PNG, "image/png", MtpConstants.FORMAT_PNG);

addFileType("BMP", FILE_TYPE_BMP, "image/x-ms-bmp", MtpConstants.FORMAT_BMP);

addFileType("WBMP", FILE_TYPE_WBMP, "image/vnd.wap.wbmp");

addFileType("WEBP", FILE_TYPE_WEBP, "image/webp");

addFileType("M3U", FILE_TYPE_M3U, "audio/x-mpegurl", MtpConstants.FORMAT_M3U_PLAYLIST);

addFileType("M3U", FILE_TYPE_M3U, "application/x-mpegurl", MtpConstants.FORMAT_M3U_PLAYLIST);

addFileType("PLS", FILE_TYPE_PLS, "audio/x-scpls", MtpConstants.FORMAT_PLS_PLAYLIST);

addFileType("WPL", FILE_TYPE_WPL, "application/vnd.ms-wpl", MtpConstants.FORMAT_WPL_PLAYLIST);

addFileType("M3U8", FILE_TYPE_HTTPLIVE, "application/vnd.apple.mpegurl");

addFileType("M3U8", FILE_TYPE_HTTPLIVE, "audio/mpegurl");

addFileType("M3U8", FILE_TYPE_HTTPLIVE, "audio/x-mpegurl");

addFileType("FL", FILE_TYPE_FL, "application/x-android-drm-fl");

addFileType("TXT", FILE_TYPE_TEXT, "text/plain", MtpConstants.FORMAT_TEXT);

addFileType("HTM", FILE_TYPE_HTML, "text/html", MtpConstants.FORMAT_HTML);

addFileType("HTML", FILE_TYPE_HTML, "text/html", MtpConstants.FORMAT_HTML);

addFileType("PDF", FILE_TYPE_PDF, "application/pdf");

addFileType("DOC", FILE_TYPE_MS_WORD, "application/msword", MtpConstants.FORMAT_MS_WORD_DOCUMENT);

addFileType("XLS", FILE_TYPE_MS_EXCEL, "application/vnd.ms-excel", MtpConstants.FORMAT_MS_EXCEL_SPREADSHEET);

addFileType("PPT", FILE_TYPE_MS_POWERPOINT, "application/vnd.ms-powerpoint", MtpConstants.FORMAT_MS_POWERPOINT_PRESENTATION);

addFileType("FLAC", FILE_TYPE_FLAC, "audio/flac", MtpConstants.FORMAT_FLAC);

addFileType("ZIP", FILE_TYPE_ZIP, "application/zip");

addFileType("MPG", FILE_TYPE_MP2PS, "video/mp2p");

addFileType("MPEG", FILE_TYPE_MP2PS, "video/mp2p");

/// M: Add more Other popular file types to maps. {@

addFileType("ICS", FILE_TYPE_ICS, "text/calendar");

addFileType("ICZ", FILE_TYPE_ICZ, "text/calendar");

addFileType("VCF", FILE_TYPE_VCF, "text/x-vcard");

addFileType("VCS", FILE_TYPE_VCS, "text/x-vcalendar");

addFileType("APK", FILE_TYPE_APK, "application/vnd.android.package-archive");

addFileType("DOCX", FILE_TYPE_MS_WORD, "application/vnd.openxmlformats-officedocument.wordprocessingml.document");

addFileType("DOTX", FILE_TYPE_MS_WORD, "application/vnd.openxmlformats-officedocument.wordprocessingml.template");

addFileType("XLSX", FILE_TYPE_MS_EXCEL, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");

addFileType("XLTX", FILE_TYPE_MS_EXCEL, "application/vnd.openxmlformats-officedocument.spreadsheetml.template");

addFileType("PPTX", FILE_TYPE_MS_POWERPOINT, "application/vnd.openxmlformats-officedocument.presentationml.presentation");

addFileType("POTX", FILE_TYPE_MS_POWERPOINT, "application/vnd.openxmlformats-officedocument.presentationml.template");

addFileType("PPSX", FILE_TYPE_MS_POWERPOINT, "application/vnd.openxmlformats-officedocument.presentationml.slideshow");

/// @}

}

根据不同的MIME类型，显示不同的图标：

    /**
     * This method gets the drawable id based on the mimetype
     *
     * @param mimeType the mimeType of a file/folder
     * @return the drawable icon id based on the mimetype
     */
    public static int getDrawableId(Context context, String mimeType) {
        if (TextUtils.isEmpty(mimeType)) {
            return R.drawable.fm_unknown;
        } else if (mimeType.startsWith("application/vnd.android.package-archive")) {
            return R.drawable.fm_apk;
        } else if (mimeType.startsWith("application/zip")) {
            return R.drawable.fm_zip;
        } else if (mimeType.startsWith("application/ogg")) {
            return R.drawable.fm_audio;
        } else if (mimeType.startsWith("audio/")) {
            return R.drawable.fm_audio;
        } else if (mimeType.startsWith("image/")) {
            return R.drawable.fm_picture;
        } else if (mimeType.startsWith("text/")) {
            return R.drawable.fm_txt;
        } else if (mimeType.startsWith("video/")) {
            return R.drawable.fm_video;
        }
        return getCustomDrawableId(context, mimeType);
    }

/**

* This method gets the drawable id based on the mimetype

* @param mimeType the mimeType of a file/folder

* @return the drawable icon id based on the mimetype

public static int getDrawableId(Context context, String mimeType) {

if (TextUtils.isEmpty(mimeType)) {

return R.drawable.fm_unknown;

} else if (mimeType.startsWith("application/vnd.android.package-archive")) {

return R.drawable.fm_apk;

} else if (mimeType.startsWith("application/zip")) {

return R.drawable.fm_zip;

} else if (mimeType.startsWith("application/ogg")) {

return R.drawable.fm_audio;

} else if (mimeType.startsWith("audio/")) {

return R.drawable.fm_audio;

} else if (mimeType.startsWith("image/")) {

return R.drawable.fm_picture;

} else if (mimeType.startsWith("text/")) {

return R.drawable.fm_txt;

} else if (mimeType.startsWith("video/")) {

return R.drawable.fm_video;

}

return getCustomDrawableId(context, mimeType);

}

参考链接

android: 通过Intent筛选多种类型文件

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