android获取多媒体库的视频、音频、图片

从媒体库中查找音频、视频、图片文件的相关信息，并获取视频、图片、专辑图片的缩略图

和一些文件操作

package com.uwatch.swconnectservice.util;

import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;


import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.MediaScannerConnection;
import android.media.MediaScannerConnection.OnScanCompletedListener;
import android.media.ThumbnailUtils;
import android.net.Uri;
import android.os.ParcelFileDescriptor;
import android.provider.MediaStore;
import android.util.Log;


public class FileOper {
public static final String [] IMAGE_COLUMN = {MediaStore.Images.Media.DATA,MediaStore.Images.Media.SIZE};
public static final String [] AUDIO_COLUMN = {MediaStore.Audio.Media.DATA,MediaStore.Audio.Media.SIZE,MediaStore.Audio.Media.DURATION,
MediaStore.Audio.Media._ID,MediaStore.Audio.Media.ALBUM_ID};
public static final String [] VIDEO_COLUMN = {MediaStore.Video.Media.DATA,MediaStore.Video.Media.SIZE,MediaStore.Audio.Media.DURATION};
private static final Uri sArtworkUri = Uri.parse("content://media/external/audio/albumart");

///创建文件夹

public static void createFile(String path){
File file = new File(path);
if(!file.exists()){
file.mkdirs();
}
}

       //删除文件，并刷新媒体库
public static void deleteFile(String path,final Context context,final int type){
File file = new File(path);
if(file.exists()){
if(file.isFile()){
file.delete();
}else if(file.isDirectory()){
deleteDirs(file);
}

}

///监听媒体库刷新情况

MediaScannerConnection.scanFile(context, new String[]{"/storage/sdcard0"}, null,new OnScanCompletedListener(){


@Override
public void onScanCompleted(String path, Uri uri) {////刷新完后做相应处理
if(type == 1){
String lists = FileOper.getVideoFile(context);
SentMessage.SendToBluetooth(context, SentMessage.WATCH_PATH, lists);
}else if(type == 2){
String lists = FileOper.getAudioFiles(context);
SentMessage.SendToBluetooth(context, SentMessage.WATCH_PATH, lists);
}else if(type == 3){
String lists = FileOper.getImageFiles(context);
SentMessage.SendToBluetooth(context, SentMessage.WATCH_PATH, lists);
}
}


});/////
}
public static void deleteDirs(File file){
if(file.isDirectory()){
File[]files = file.listFiles();
if(files == null || files.length == 0){
file.delete();
}else {
for(int i = 0;i<files.length;i++){
if(files[i].isDirectory()){
deleteDirs(files[i]);
}else{
files[i].delete();
}
}
}
file.delete();
}
}

///获取相应目录下的文件、文件夹

public static String getFileInfoList(String path) {
File file = new File(path);
String lists = "";
File[] files = file.listFiles();
if(files != null){
if(files.length>0){
for(int i = 0;i<files.length;i++){
if(file.exists()){
if(files[i].isFile()){
lists = lists+"1,"+Util.encodeBase64(files[i].getName())+","+Util.encodeBase64(files[i].getAbsolutePath())+","+getFileSize(files[i])+"}";
}else if(files[i].isDirectory()){
lists = lists+"0,"+Util.encodeBase64(files[i].getName())+","+Util.encodeBase64(files[i].getAbsolutePath())+",0}";
}  
}
}
}
}
return lists;
}

////查询视频文件
public static String getVideoFile(Context context){
ContentResolver resolver = context.getContentResolver();
Cursor cursor = resolver.query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, VIDEO_COLUMN, null, null, null);
String tp = "video}";
if(cursor != null){
if(cursor.moveToFirst()){
String path = cursor.getString(cursor.getColumnIndex(VIDEO_COLUMN[0]));
String size = cursor.getString(cursor.getColumnIndex(VIDEO_COLUMN[1]));
String duration = cursor.getString(cursor.getColumnIndex(VIDEO_COLUMN[2]));
//String thumbnail = Util.bitmaptoString(getVideoThumbnail(path, 96, 96, MediaStore.Images.Thumbnails.MICRO_KIND));
//tp = tp+Util.encodeBase64(path)+","+size+","+duration+","+thumbnail+"}";
tp = tp+Util.encodeBase64(path)+","+size+","+duration+"}";
while(cursor.moveToNext()){
path = cursor.getString(cursor.getColumnIndex(VIDEO_COLUMN[0]));
size = cursor.getString(cursor.getColumnIndex(VIDEO_COLUMN[1]));
duration = cursor.getString(cursor.getColumnIndex(VIDEO_COLUMN[2]));
//tp = tp+Util.encodeBase64(path)+","+size+","+duration+","+thumbnail+"}";
tp = tp+Util.encodeBase64(path)+","+size+","+duration+"}";
}
}
}
return tp;
}

      //查询音频文件
public static String getAudioFiles(Context context){
ContentResolver resolver = context.getContentResolver();
Cursor cursor = resolver.query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, AUDIO_COLUMN, null, null, null);
String tp = "audio}";
if(cursor != null){
if(cursor.moveToFirst()){
String path = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[0]));
String size = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[1]));
String duration = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[2]));
/*String id = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[3]));
String albumid = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[4]));
Bitmap bt = getMusicBitemp(context,Long.valueOf(id),Long.valueOf(albumid));
String thumbnail = "audio";
if(bt != null){
thumbnail = Util.bitmaptoString(getAudioThumbnail(bt, 96, 96));
}
tp = tp+Util.encodeBase64(path)+","+size+","+duration+","+thumbnail+"}";*/
tp = tp+Util.encodeBase64(path)+","+size+","+duration+"}";
while(cursor.moveToNext()){
path = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[0]));
size = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[1]));
duration = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[2]));
/*id = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[3]));
albumid = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[4]));
bt = getMusicBitemp(context,Long.valueOf(id),Long.valueOf(albumid));
thumbnail = "audio";
if(bt != null){
thumbnail = Util.bitmaptoString(getAudioThumbnail(bt, 96, 96));
}
tp = tp+Util.encodeBase64(path)+","+size+","+duration+","+thumbnail+"}";*/
tp = tp+Util.encodeBase64(path)+","+size+","+duration+"}";
}
}
}
return tp;
}

////查询图片
public static String getImageFiles(Context context){
ContentResolver resolver = context.getContentResolver();
Cursor cursor = resolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_COLUMN, null, null, null);
String tp = "image}";
if(cursor != null){
if(cursor.moveToFirst()){
String path = cursor.getString(cursor.getColumnIndex(IMAGE_COLUMN[0]));
String size = cursor.getString(cursor.getColumnIndex(IMAGE_COLUMN[1]));
/*String thumbnail = Util.bitmaptoString(getImageThumbnail(path, 96, 96));
tp = tp+Util.encodeBase64(path)+","+size+","+thumbnail+"}";*/
tp = tp+Util.encodeBase64(path)+","+size+"}";
while(cursor.moveToNext()){
path = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[0]));
size = cursor.getString(cursor.getColumnIndex(AUDIO_COLUMN[1]));
/*thumbnail = Util.bitmaptoString(getImageThumbnail(path, 96, 96));
tp = tp+Util.encodeBase64(path)+","+size+","+thumbnail+"}";*/
tp = tp+Util.encodeBase64(path)+","+size+"}";
}
}
}
return tp;
}

   ///获取音频文件专辑图片
public static Bitmap getMusicBitemp(Context context, Long songid,
Long albumid) {
Bitmap bm = null;
if (albumid < 0 && songid < 0) {
throw new IllegalArgumentException(
"Must specify an album or a song id");
}
try {
if (albumid < 0) {
Uri uri = Uri.parse("content://media/external/audio/media/"
+ songid + "/albumart");
ParcelFileDescriptor pfd = context.getContentResolver()
.openFileDescriptor(uri, "r");
if (pfd != null) {
FileDescriptor fd = pfd.getFileDescriptor();
bm = BitmapFactory.decodeFileDescriptor(fd);
}
} else {
Uri uri = ContentUris.withAppendedId(sArtworkUri, albumid);
ParcelFileDescriptor pfd = context.getContentResolver()
.openFileDescriptor(uri, "r");
if (pfd != null) {
FileDescriptor fd = pfd.getFileDescriptor();
bm = BitmapFactory.decodeFileDescriptor(fd);
} else {
return null;
}
}
} catch (FileNotFoundException ex) {
return null;
}
return bm;
}

     ////获取图片缩略图
public static Bitmap getImageThumbnail(String imagePath, int width, int height) {  
Bitmap bitmap = null;  
BitmapFactory.Options options = new BitmapFactory.Options();  
options.inJustDecodeBounds = true;  
bitmap = BitmapFactory.decodeFile(imagePath, options);  
options.inJustDecodeBounds = false; 

int h = options.outHeight;  
int w = options.outWidth;  
int beWidth = w / width;  
int beHeight = h / height;  
int be = 1;  
if (beWidth < beHeight) {  
be = beWidth;  
} else {  
be = beHeight;  
}  
if (be <= 0) {  
be = 1;  
}  
options.inSampleSize = be;  

bitmap = BitmapFactory.decodeFile(imagePath, options);  
 
bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height,  
ThumbnailUtils.OPTIONS_RECYCLE_INPUT);  
return bitmap;  
}  


////获取音频专辑图片的缩略图
public static Bitmap getAudioThumbnail(Bitmap bitmap, int width, int height) {  
BitmapFactory.Options options = new BitmapFactory.Options();  
int h = bitmap.getHeight();  
int w = bitmap.getWidth();  
int beWidth = w / width;  
int beHeight = h / height;  
int be = 1;  
if (beWidth < beHeight) {  
be = beWidth;  
} else {  
be = beHeight;  
}  
if (be <= 0) {  
be = 1;  
}  
bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height,  
ThumbnailUtils.OPTIONS_RECYCLE_INPUT);  
return bitmap;  
}  
 /////获取视频文件缩略图
public static Bitmap getVideoThumbnail(String videoPath, int width, int height,  
int kind) {  
Bitmap bitmap = null;  

bitmap = ThumbnailUtils.createVideoThumbnail(videoPath, kind);  
System.out.println("w"+bitmap.getWidth());  
System.out.println("h"+bitmap.getHeight());  
bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height,  
ThumbnailUtils.OPTIONS_RECYCLE_INPUT);  
return bitmap;  
}  

///获取文件大小
public static int getFileSize(File file){
InputStream is=null;
int size=0;
try {
is=new FileInputStream(file);
size= is.available();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(is!=null){
try {
is.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return size;
}
}