Android开发之多媒体文件获取工具类实例【音频,视频,图片等】
本文实例讲述了Android开发之多媒体文件获取工具类。分享给大家供大家参考，具体如下：
packagecom.android.ocr.util;
importjava.io.File;
importjava.util.ArrayList;
importjava.util.List;
importandroid.content.Context;
importandroid.database.Cursor;
importandroid.graphics.Bitmap;
importandroid.provider.MediaStore;
/**
*根据MediaStore查询信息
*@ProjectApp_ReadCard
*@Packagecom.android.ocr.util
*@authorchenlin
*@version1.0
*@Date2013年6月16日
*@NoteTODO
*/
publicclassMediaStoreUtil{
privatestaticfinalStringTAG="MediaStoreUtil";
/**
*查询音频文件名称
*
*@paramcontext
*@return
*/
publicstaticListgetAudioNames(Contextcontext){
Listlist=newArrayList();
Cursorcursor=context.getContentResolver().query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
newString[]{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},null,newString[]{},null);
while(cursor.moveToNext()){
StringfileName=cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));
list.add(fileName);
}
returnlist;
}
/**
*查询图片文件名称
*
*@paramcontext
*@return
*/
publicstaticListgetImageNames(Contextcontext){
Listlist=newArrayList();
Cursorcursor=context.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
newString[]{MediaStore.Images.Media._ID,MediaStore.Images.Media.DISPLAY_NAME,MediaStore.Images.Media.TITLE,
MediaStore.Images.Media.MIME_TYPE,MediaStore.Images.Media.SIZE,MediaStore.Images.Media.DATA},null,
newString[]{},null);
while(cursor.moveToNext()){
Logger.i(TAG,"filePath=="+MediaStore.Images.Media.DATA);
StringfilePath=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
StringfileName=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));
list.add(filePath+"/"+fileName);
}
returnlist;
}
/**
*查询图片文件
*
*@paramcontext
*@return
*/
publicstaticListgetImages(Contextcontext){
Listlist=newArrayList();
Cursorcursor=context.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
newString[]{MediaStore.Images.Media._ID,MediaStore.Images.Media.DISPLAY_NAME,MediaStore.Images.Media.TITLE,
MediaStore.Images.Media.MIME_TYPE,MediaStore.Images.Media.SIZE,MediaStore.Images.Media.DATA},null,
newString[]{},null);
while(cursor.moveToNext()){
StringfilePath=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
Logger.i(TAG,"filePath=="+filePath);
StringfileName=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));
//Logger.i(TAG,"fileName=="+fileName);
Filefile=newFile(filePath);
list.add(file);
}
returnlist;
}
/**
*查询文件
*
*@paramcontext
*@return
*/
publicstaticListgetAllFiles(Contextcontext){
Listlist=newArrayList();
Cursorcursor=context.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
newString[]{MediaStore.Images.Media._ID,MediaStore.Images.Media.DISPLAY_NAME,MediaStore.Images.Media.TITLE,
MediaStore.Images.Media.MIME_TYPE,MediaStore.Images.Media.SIZE,MediaStore.Images.Media.DATA},null,
newString[]{},null);
while(cursor.moveToNext()){
StringfilePath=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
Logger.i(TAG,"filePath=="+filePath);
StringfileName=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));
//Logger.i(TAG,"fileName=="+fileName);
Filefile=newFile(filePath);
list.add(file);
}
returnlist;
}
/**
*获取所有的缩列图
*
*@paramcontext
*@return
*/
publicstaticBitmap[]getBitmaps(Contextcontext){
Bitmap[]bitmaps;
String[]projection={MediaStore.Images.Media._ID,MediaStore.Images.Media.DATA};
Cursorcursor=context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,projection,null,null,
MediaStore.Images.Media._ID);
intcount=cursor.getCount();
intimage_column_index=cursor.getColumnIndex(MediaStore.Images.Media._ID);
bitmaps=newBitmap[count];
for(inti=0;igetThumbNames(Contextcontext){
Listlist=newArrayList();
Cursorcursor=context.getContentResolver().query(
MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
newString[]{MediaStore.Images.Thumbnails._ID,MediaStore.Images.Thumbnails.DATA,MediaStore.Images.Thumbnails.KIND,
MediaStore.Images.Thumbnails.IMAGE_ID},null,newString[]{},null);
while(cursor.moveToNext()){
StringfileName=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));
list.add(fileName);
}
returnlist;
}
/**
*获得所有视频文件
*@paramcontext
*/
publicstaticArrayListgetVideoInfo(Contextcontext){
String[]thumbColumns=newString[]{
MediaStore.Video.Thumbnails.DATA,
MediaStore.Video.Thumbnails.VIDEO_ID
};
String[]mediaColumns=newString[]{
MediaStore.Video.Media.DATA,
MediaStore.Video.Media._ID,
MediaStore.Video.Media.TITLE,
MediaStore.Video.Media.MIME_TYPE
};
//首先检索SDcard上所有的video
Cursorcursor=context.getContentResolver().query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI,mediaColumns,null,null,null);
ArrayListvideoList=newArrayList();
if(cursor.moveToFirst()){
do{
VideoInfoinfo=newVideoInfo();
info.filePath=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));
info.mimeType=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE));
info.title=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.TITLE));
//获取当前Video对应的Id，然后根据该ID获取其Thumb
intid=cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID));
Stringselection=MediaStore.Video.Thumbnails.VIDEO_ID+"=?";
String[]selectionArgs=newString[]{
id+""
};
CursorthumbCursor=context.getContentResolver().query(MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI,thumbColumns,selection,selectionArgs,null);
if(thumbCursor.moveToFirst()){
info.thumbPath=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Thumbnails.DATA));
}
//然后将其加入到videoList
videoList.add(info);
}while(cursor.moveToNext());
}
returnvideoList;
}
staticclassVideoInfo{
StringfilePath;
StringmimeType;
StringthumbPath;
Stringtitle;
}
}
更多关于Android相关内容感兴趣的读者可查看本站专题：《Android多媒体操作技巧汇总(音频,视频,录音等)》、《Android开发入门与进阶教程》、《Android视图View技巧总结》、《Android文件操作技巧汇总》、《Android资源操作技巧汇总》及《Android控件用法总结》
希望本文所述对大家Android程序设计有所帮助。