将自己的应用成为android系统关联软件

<activity android:name=".MainActivity" >
			<intent-filter>
				<action android:name="android.intent.action.MAIN" />
				<category android:name="android.intent.category.LAUNCHER" />
			</intent-filter>
			<intent-filter>
				<action android:name="android.intent.action.VIEW" />
				<category android:name="android.intent.category.DEFAULT" />
				<category android:name="android.intent.category.BROWSABLE" />
				<data android:mimeType="video/wmv" />
				<data android:mimeType="video/mp4" />
				<data android:mimeType="video/flv" />
			</intent-filter>
		</activity>

{".3gp", "video/3gpp"}, 

{".apk", "application/vnd.android.package-archive"}, 

{".asf", "video/x-ms-asf"}, 

{".avi", "video/x-msvideo"}, 

{".bin", "application/octet-stream"}, 

{".bmp", "image/bmp"}, 

{".c", "text/plain"}, 

{".class", "application/octet-stream"}, 

{".conf", "text/plain"}, 

{".cpp", "text/plain"}, 

{".doc", "application/msword"}, 

{".exe", "application/octet-stream"}, 

{".gif", "image/gif"}, 

{".gtar", "application/x-gtar"}, 

{".gz", "application/x-gzip"}, 

{".h", "text/plain"}, 

{".htm", "text/html"}, 

{".html", "text/html"}, 

{".jar", "application/java-archive"}, 

{".java", "text/plain"}, 

{".jpeg", "image/jpeg"}, 

{".jpg", "image/jpeg"}, 

{".js", "application/x-javascript"}, 

{".log", "text/plain"}, 

{".m3u", "audio/x-mpegurl"}, 

{".m4a", "audio/mp4a-latm"}, 

{".m4b", "audio/mp4a-latm"}, 

{".m4p", "audio/mp4a-latm"}, 

{".m4u", "video/vnd.mpegurl"}, 

{".m4v", "video/x-m4v"}, 

{".mov", "video/quicktime"}, 

{".mp2", "audio/x-mpeg"}, 

{".mp3", "audio/x-mpeg"}, 

{".mp4", "video/mp4"}, 

{".mpc", "application/vnd.mpohun.certificate"}, 

{".mpe", "video/mpeg"}, 

{".mpeg", "video/mpeg"}, 

{".mpg", "video/mpeg"}, 

     {".mpg4", "video/mp4"}, 

{".mpga", "audio/mpeg"}, 

{".msg", "application/vnd.ms-outlook"}, 

{".ogg", "audio/ogg"}, 

{".pdf", "application/pdf"}, 

{".png", "image/png"}, 

{".pps", "application/vnd.ms-powerpoint"}, 

{".ppt", "application/vnd.ms-powerpoint"}, 

{".prop", "text/plain"}, 

{".rar", "application/x-rar-compressed"}, 

{".rc", "text/plain"}, 

{".rmvb", "audio/x-pn-realaudio"}, 

{".rtf", "application/rtf"}, 

{".sh", "text/plain"}, 

{".tar", "application/x-tar"}, 

{".tgz", "application/x-compressed"}, 

{".txt", "text/plain"}, 

{".wav", "audio/x-wav"}, 

{".wma", "audio/x-ms-wma"}, 

{".wmv", "audio/x-ms-wmv"}, 

{".wps", "application/vnd.ms-works"}, 

//{".xml", "text/xml"}, 

{".xml", "text/plain"}, 

{".z", "application/x-compress"}, 

{".zip", "application/zip"}, 

{"", "*/*"} 

获取文件路径
Uri uri = getIntent().getData();
if(uri!=null){
videoPath = uri.getPath();
}