Mediametadataretriever class obtains Media File Information

API Description: mediametadataretriever class provides a unified interface for retrieving frame and meta data from an input media file.

The mediametadataretriever class provides a unified interface for retrieving frames and metadata from an input media file.

API official link: http://developer.android.com/reference/android/media/MediaMetadataRetriever.html

1. The following uses a small example to demonstrate how to obtain part of media information from a music file:

Public class mainactivity extends activity {Private Static final string tag = "mainactivity"; @ targetapi (10) @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. activity_main); mediametadataretriever MMR = new mediametadataretriever (); string STR = getexternalstoragedirectory () + "music/hetangyuese.mp3"; log. D (TAG, "str:" + Str); try {MMR. setdatasource (STR); String title = MMR. extractmetadata (mediametadataretriever. metadata_key_title); // API level 10. This function is available from gb2.3.3. D (TAG, "title:" + title); string album = MMR. extractmetadata (mediametadataretriever. metadata_key_album); log. D (TAG, "album:" + album); string mime = MMR. extractmetadata (mediametadataretriever. metadata_key_mimetype); log. D (TAG, "MIME:" + MIME); string artist = MMR. extractmetadata (mediametadataretriever. metadata_key_artist); log. D (TAG, "Artist:" + artist); string duration = MMR. extractmetadata (mediametadataretriever. metadata_key_duration); // The unit of playback duration is millisecond log. D (TAG, "Duration:" + duration); string bitrate = MMR. extractmetadata (mediametadataretriever. metadata_key_bitrate); // This function is available only from API Level 14, that is, log from ics4.0. D (TAG, "bitrate:" + bitrate); string date = MMR. extractmetadata (mediametadataretriever. metadata_key_date); log. D (TAG, "date:" + date);} catch (illegalargumentexception e) {// todo auto-generated catch blocke. printstacktrace ();} catch (illegalstateexception e) {// todo auto-generated catch blocke. printstacktrace () ;}@ override public Boolean oncreateoptionsmenu (menu) {getmenuinflater (). inflate (R. menu. activity_main, menu); Return true;} public static string getexternalstoragedirectory () {return environment. getexternalstoragedirectory () + "/";}}

The information output is as follows:

08-09 15:53:52. 119: D/mainactivity (5293): Str:/mnt/sdcard/music/hetangyuese.mp3
08-09 15:53:52. 810: D/mainactivity (5293): Title: hetang moonlight
08-09 15:53:52. 829: D/mainactivity (5293): album: I'm from grassland
08-09 15:53:52. 859: D/mainactivity (5293): MIME: Audio/MPEG
08-09 15:53:52. 868: D/mainactivity (5293): ARTIST: Phoenix Legend
08-09 15:53:52. 893: D/mainactivity (5293): Duration: 9172
08-09 15:53:52. 899: D/mainactivity (5293): bitrate: 128000
08-09 15:53:52. 909: D/mainactivity (5293): Date: NULL

2. If it is a video file, you can also use the getframeattime method to obtain bitmap at the specified time location, which can be used to capture images (including thumbnails.

By viewing the API, the keycode for sampling rate acquisition (samplerate) is not found and may be provided in later versions.

The above is a brief introduction to the mediametadataretriever class.