通过路径获取媒体文件信息

方法一：解析媒体文件（具体参考：http://hi.baidu.com/luodaijun/blog/item/b487abaf8b0475c17dd92afd.html http://blog.sina.com.cn/s/blog_77dab8e20100skb7.html） 方法二：读取媒体文件数据库： 创建工具包：com.sky_dreaming.tools.media.provider 编写媒体信息封装类：MediaInfo.java package com.sky_dreaming.tools.media.provider; import java.io.UnsupportedEncodingException; import android.graphics.Bitmap; /** * Media info beans * * */ public class MediaInfo { /** * play total time */ private int playDuration = 0; /** * song name */ private String mediaName = ""; /** * album name */ private String mediaAlbum = ""; /** * artist name */ private String mediaArtist = ""; /** * mYear */ private String mediaYear = ""; /** * fileName */ private String mFileName = ""; /** * mFileType */ private String mFileType = ""; /** * mFileSize */ private String mFileSize = ""; /** * mFilePath */ private String mFilePath = ""; public Bitmap getmBitmap() { return mBitmap; } public void setmBitmap(Bitmap mBitmap) { this.mBitmap = mBitmap; } private Bitmap mBitmap = null; /** * getPlayDuration * * @return */ public int getPlayDuration() { return playDuration; } /** * setPlayDuration * * @param playDuration */ public void setPlayDuration(int playDuration) { this.playDuration = playDuration; } /** * getMediaName * * @param playDuration */ public String getMediaName() { return mediaName; } /** * setMediaName * * @param playDuration */ public void setMediaName(String mediaName) { try { mediaName =new String (mediaName.getBytes("ISO-8859-1"),"GBK"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } this.mediaName = mediaName; } /** * getMediaAlbum * * @param playDuration */ public String getMediaAlbum() { return mediaAlbum; } /** * setMediaAlbum * * @param playDuration */ public void setMediaAlbum(String mediaAlbum) { try { mediaAlbum =new String (mediaAlbum.getBytes("ISO-8859-1"),"GBK"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } this.mediaAlbum = mediaAlbum; } /** * getMediaArtist * * @param playDuration */ public String getMediaArtist() { return mediaArtist; } /** * setMediaArtist * * @param playDuration */ public void setMediaArtist(String mediaArtist) { try { mediaArtist =new String (mediaArtist.getBytes("ISO-8859-1"),"GBK"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } this.mediaArtist = mediaArtist; } /** * getMediaYear * * @param playDuration */ public String getMediaYear() { return mediaYear; } /** * setMediaYear * * @param playDuration */ public void setMediaYear(String mediaYear) { this.mediaYear = mediaYear; } /** * getmFileName * * @param playDuration */ public String getmFileName() { return mFileName; } /** * setmFileName * * @param playDuration */ public void setmFileName(String mFileName) { this.mFileName = mFileName; } /** * getmFileType * * @param playDuration */ public String getmFileType() { return mFileType; } /** * setmFileType * * @param playDuration */ public void setmFileType(String mFileType) { this.mFileType = mFileType; } /** * getmFileSize * * @param playDuration */ public String getmFileSize() { return mFileSize; } /** * setmFileSize * * @param playDuration */ public void setmFileSize(String mFileSize) { this.mFileSize = mFileSize; } /** * getmFilePath * * @param playDuration */ public String getmFilePath() { return mFilePath; } /** * setmFilePath * * @param playDuration */ public void setmFilePath(String mFilePath) { this.mFilePath = mFilePath; } } 编写数据提供工具类：MediaInfoProvider package com.sky_dreaming.tools.media.provider; import java.io.File; import android.content.Context; import android.database.Cursor; import android.net.Uri; import android.provider.MediaStore; import android.provider.MediaStore.MediaColumns; import android.util.Log; import android.widget.Toast; /** * tools to get media file info * * */ public class MediaInfoProvider { /** * context */ private Context mContext = null; /** * data path */ private static final String dataPath = "/mnt"; /** * query column */ private static final String[] mCursorCols = new String[] { MediaStore.Audio.Media._ID, MediaStore.Audio.Media.DISPLAY_NAME, MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.DURATION, MediaStore.Audio.Media.ARTIST, MediaStore.Audio.Media.ALBUM, MediaStore.Audio.Media.YEAR, MediaStore.Audio.Media.MIME_TYPE, MediaStore.Audio.Media.SIZE, MediaStore.Audio.Media.DATA }; /** * MediaInfoProvider * @param context */ public MediaInfoProvider(Context context) { this.mContext = context; } /** * get the media file info by path * @param filePath * @return */ public MediaInfo getMediaInfo(String filePath) { /* check a exit file */ File file = new File(filePath); if (file.exists()) { Toast.makeText(mContext, "sorry, the file is not exit!", Toast.LENGTH_SHORT); } /* create the query URI, where, selectionArgs */ Uri Media_URI = null; String where = null; String selectionArgs[] = null; if (filePath.startsWith("content://media/")) { /* content type path */ Media_URI = Uri.parse(filePath); where = null; selectionArgs = null; } else { /* external file path */ if(filePath.indexOf(dataPath) < 0) { filePath = dataPath + filePath; } Media_URI = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; where = MediaColumns.DATA + "=?"; selectionArgs = new String[] { filePath }; } /* query */ Cursor cursor = mContext.getContentResolver().query(Media_URI, mCursorCols, where, selectionArgs, null); if (cursor == null || cursor.getCount() == 0) { return null; } else { cursor.moveToFirst(); MediaInfo info = getInfoFromCursor(cursor); printInfo(info); return info; } } /** * get the media info beans from cursor * @param cursor * @return */ private MediaInfo getInfoFromCursor(Cursor cursor) { MediaInfo info = new MediaInfo(); /* file name */ if(cursor.getString(1) != null) { info.setmFileName(cursor.getString(1)); } /* media name */ if(cursor.getString(2) != null) { info.setMediaName(cursor.getString(2)); } /* play duration */ if(cursor.getString(3) != null) { info.setPlayDuration(cursor.getInt(3)); } /* artist */ if(cursor.getString(4) != null) { info.setMediaArtist(cursor.getString(4)); } /* album */ if(cursor.getString(5) != null) { info.setMediaAlbum(cursor.getString(5)); } /* media year */ if (cursor.getString(6) != null) { info.setMediaYear(cursor.getString(6)); } else { info.setMediaYear("undefine"); } /* media type */ if(cursor.getString(7) != null) { info.setmFileType(cursor.getString(7).trim()); } /* media size */ if (cursor.getString(8) != null) { float temp = cursor.getInt(8) / 1024f / 1024f; String sizeStr = (temp + "").substring(0, 4); info.setmFileSize(sizeStr + "M"); } else { info.setmFileSize("undefine"); } /* media file path */ if (cursor.getString(9) != null) { info.setmFilePath(cursor.getString(9)); } return info; } /** * print media info * @param info */ private void printInfo(MediaInfo info) { // TODO Auto-generated method stub Log.i("playDuration","" + info.getPlayDuration()); Log.i("mediaName","" + info.getMediaName()); Log.i("mediaAlbum","" + info.getMediaAlbum()); Log.i("mediaArtist","" + info.getMediaArtist()); Log.i("mediaYear","" + info.getMediaYear()); Log.i("fileName","" + info.getmFileName()); Log.i("fileType","" + info.getmFileType()); Log.i("fileSize","" + info.getmFileSize()); Log.i("filePath","" + info.getmFilePath()); } } 可以避免乱码