如何获得在Android中,从专辑/歌手的歌曲,用类MediaMetadataRetriever? [英] How to get songs from album/Artist in android,using MediametadataRetriever?

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本文介绍了如何获得在Android中,从专辑/歌手的歌曲,用类MediaMetadataRetriever?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

首先,我是一个新手,二来我知道存在一个解决方案如何得到歌曲专辑的Andr​​oid?但是这是通过使用鼠标和MediaStore和我用类MediaMetadataRetriever其完全不同的我没有用包含HashMap和所有.....所以它变得有点困难....请任何本???解决方案,而无需使用包含HashMap和mediastore ???

这里是$ C $词都用来显示所有歌曲和旗下艺人..........

 进口的java.io.File;
进口java.io.FileFilter中;
进口java.io.FilenameFilter;
的Bean;
进口java.lang.reflect.Array中;
进口的java.util.ArrayList;
进口的java.util.List;

进口android.annotation.Sup pressLint;
进口android.content.Context;
进口android.content.Intent;
进口android.graphics.Bitmap;
进口android.graphics.BitmapFactory;
进口android.media.MediaMetadataRetriever;
进口android.media.MediaPlayer;
进口android.net.Uri;
进口android.os.Bundle;
进口android.support.v4.app.Fragment;
进口android.support.v4.app.ListFragment;
进口android.util.DisplayMetrics;
进口android.util.TypedValue;
进口android.view.ContextMenu;
进口android.view.ContextMenu.ContextMenuInfo;
进口android.view.LayoutInflater;
进口android.view.Menu;
进口android.view.MenuItem;
进口android.view.View;
进口android.view.ViewGroup;
进口android.widget.AdapterView;
进口android.widget.AdapterView.AdapterContextMenuInfo;
进口android.widget.AdapterView.OnItemClickListener;
进口android.widget.ArrayAdapter;
进口android.widget.ListView;


公共类FragmentSongs扩展片段实现Serializable {
    AdapterView.AdapterContextMenuInfo信息;

    @覆盖
    公共查看onCreateView(LayoutInflater充气,容器的ViewGroup,
        捆绑savedInstanceState){
        查看查看= inflater.inflate(R.layout.fragment_song,集装箱,假);
        ListView控件SngList =(ListView控件)view.findViewById(R.id.SongList);
        registerForContextMenu(SngList);
        文件f =新的文件(/ SD卡/音乐);
        INT J = 0; INT I = 0;
        最后的ArrayList< SongDetails> Songinfo = getSongsFromDirectory(F);

        如果(Songinfo.size()大于0){
            为(J = 0; J< Songinfo.size(); J ++){
                对于(I = J + 1; I< Songinfo.size();我++){
                    SongDetails一个= Songinfo.get(ⅰ);
                    SongDetails B = Songinfo.get(J);
                    如果(。a.getSong()与toLowerCase()的compareTo(b.getSong()与toLowerCase())≤; 0){
                        Songinfo.set(I,B);
                        Songinfo.set(J,A);
                    }
                 }
             }

             SngList.setOnItemClickListener(新OnItemClickListener(){
                 公共无效onItemClick(适配器视图一,视图V,INT位置,长的id){
                     意向意图=新的意图(getActivity(),NowPlaying.class);
                     intent.putParcelableArrayListExtra(数据1,Songinfo);

                     intent.putExtra(数据2,位置);
                     startActivity(意向);
                 }
             });

             SngList.setAdapter(新CustomAdapter(Songinfo));
             返回查看;
         } 其他 {
             返回null;
         }
   }

   公众的ArrayList< SongDetails> getSongsFromDirectory(文件f){
       类MediaMetadataRetriever MMR =新类MediaMetadataRetriever();
       ArrayList的< SongDetails>歌曲=新的ArrayList< SongDetails>();
       位图bitmap2;
       BMP位= BitmapFactory.de codeResource(getResources(),R.drawable.ab);

       浮ht_px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,100,getResources()getDisplayMetrics());
       浮wt_px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,100,getResources()getDisplayMetrics());

       位图bitmap3 = Bitmap.createScaledBitmap(BMP,(INT)ht_px,(INT)wt_px,真正的);
       byte []的rawArt = NULL;
       位图艺术;
       BitmapFactory.Options BFO =新BitmapFactory.Options();
       如果(!f.exists()||!f.isDirectory()){
           返回歌曲;
       }
       文件[]文件= f.listFiles(新Mp3Filter());
       的for(int i = 0; I< files.length;我++){
           如果(文件[I] .isFile()){
               mmr.setDataSource(文件[I] .getPath());
               rawArt = mmr.getEmbeddedPicture();
               SongDetails细节=新SongDetails();
               如果(rawArt!= NULL){
                   bitmap2 = BitmapFactory.de codeByteArray(rawArt,0,rawArt.length,BFO);
                   bitmap2 = Bitmap.createScaledBitmap(bitmap2,(INT)ht_px,(INT)wt_px,真正的);
                   detail.setIcon(bitmap2);
               } 其他 {
                   detail.setIcon(bitmap3);
               }

               detail.setSong(文件[I] .getName());
               detail.setArtist(文件[I] .getName());
               detail.setArtist(mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST));
               detail.setAlbum(mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM));
               detail.setPath2(文件[I] .getPath());
               songs.add(详细);
            }否则如果(文件[I] .isDirectory()){
                songs.addAll(getSongsFromDirectory(文件[I]));
            }

        }
        返回歌曲;
    }

    @覆盖
    公共无效onCreateContextMenu(文本菜单菜单,视图V,ContextMenuInfo menuInfo){
        super.onCreateContextMenu(菜单,V,menuInfo);
        信息=(AdapterContextMenuInfo)menuInfo;
        menu.add(Menu.NONE,v.getId(),0,播放);
        menu.add(Menu.NONE,v.getId(),0,删除);
        menu.add(Menu.NONE,v.getId(),0,队列项);
    }

    @覆盖
    公共布尔onContextItemSelected(菜单项项){
        如果(item.getTitle()==播放){

        }否则,如果(item.getTitle()==删除){

        }否则,如果(item.getTitle()==队列项){

        } 其他 {
            返回false;
        }
            返回true;
    }
}

类Mp3Filter实现的FileFilter {
    公共布尔接受(档案文件){
        返程(file.isDirectory()|| file.getName()的endsWith(MP3)|| file.getName()的endsWith(MP3));
    }
}
 

解决方案

看看这个教程:

<一个href="http://www.srikanthtechnologies.com/blog/android/audioplayer.aspx">http://www.srikanthtechnologies.com/blog/android/audioplayer.aspx

您可以修改它稍微满足您的需求:

 私人的ArrayList&LT; SongDeatils&GT; getSongList(文件musicFolder){
    ArrayList的&LT; SongDeatils&GT;歌曲=新的ArrayList&LT; SongDeatils&GT;();

    对于(文件F:musicFolder.listFiles()){
        类MediaMetadataRetriever MD =新类MediaMetadataRetriever();
        md.setDataSource(musicFolder +/+ f.getName());

        //指定如标题,艺术家,等等变量

        SongDeatils S =新SongDeatils();
        s.setTitle(职称);
        s.setArtist(艺术家);
        s.setSong(f.getPath());
        // ...

        songs.add(多个);
    }

    返回歌曲;
}
 

有关的图像(封面)的处理,它应该被异步在适配器中完成的。我建议使用通用图像装载机

更新:

刚刚看到您的意见。你真正需要的是一种有效的方式,从一个特定的专辑或艺术家列表中的歌曲,不使用文件过滤器和排序。唯一的其他选择的话,就是用 MediaStore / 光标。有不同类型,你可以构造查询,具体取决于您要查看的数据。

因此​​,可以查询艺术家的名单,你会使用 MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI 并使用艺术家的名字作为选择的args。

有关的专辑列表,你现在有 ARTIST_KEY ,你可以用它来查询 MediaStore.Audio.Artists.Albums.EXTERNAL_CONTENT_URI ,获得专辑列表对于给定的艺术家。

有关如何列出所有专辑对于一个给定的艺术家的例子,请参见这里

First of all i am a newbie and secondly i know there exists a solution for "How to get songs from album in android?" but that is by using cursor and MediaStore and i have used MediametadataRetriever and its totally different i haven't used hashmaps and all.....so its getting a bit difficult....please any solutions for this???without using hashmaps and mediastore???

here is the code i have used to display all songs and its artists ..........

import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;
import java.io.Serializable;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.MediaMetadataRetriever;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.ListFragment;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;


public class FragmentSongs extends  Fragment implements Serializable {
    AdapterView.AdapterContextMenuInfo info;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_song, container, false);
        ListView SngList = (ListView) view.findViewById(R.id.SongList);
        registerForContextMenu(SngList);
        File f=new File("/sdcard/Music");
        int j=0;int i=0;
        final ArrayList<SongDetails> Songinfo = getSongsFromDirectory(f);

        if (Songinfo.size()>0) {
            for( j=0; j<Songinfo.size();j++) {
                for ( i=j+1 ; i<Songinfo.size(); i++) { 
                    SongDetails a=Songinfo.get(i);
                    SongDetails b=Songinfo.get(j);
                    if (a.getSong().toLowerCase().compareTo(b.getSong().toLowerCase()) < 0) {
                        Songinfo.set(i,b );
                        Songinfo.set(j,a);
                    }
                 }
             }

             SngList.setOnItemClickListener(new OnItemClickListener() { 
                 public void onItemClick(AdapterView a, View v, int position, long id) {
                     Intent intent = new Intent(getActivity(), NowPlaying.class);
                     intent.putParcelableArrayListExtra("Data1",Songinfo);

                     intent.putExtra("Data2",position);
                     startActivity(intent);
                 }
             });

             SngList.setAdapter(new CustomAdapter(Songinfo));
             return view;
         } else {
             return null;
         }
   }

   public ArrayList<SongDetails> getSongsFromDirectory(File f) {
       MediaMetadataRetriever mmr = new MediaMetadataRetriever();
       ArrayList<SongDetails> songs = new ArrayList<SongDetails>();
       Bitmap bitmap2; 
       Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.ab);

       float ht_px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());
       float wt_px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());

       Bitmap bitmap3 = Bitmap.createScaledBitmap(bmp, (int) ht_px, (int) wt_px, true);
       byte[] rawArt = null;
       Bitmap art;
       BitmapFactory.Options bfo=new BitmapFactory.Options();
       if (!f.exists() || !f.isDirectory()) {    
           return songs;
       }
       File[] files = f.listFiles(new Mp3Filter());
       for(int i=0; i<files.length; i++) { 
           if (files[i].isFile()) { 
               mmr.setDataSource(files[i].getPath());
               rawArt = mmr.getEmbeddedPicture();
               SongDetails detail=new SongDetails(); 
               if ( rawArt != null) {
                   bitmap2=BitmapFactory.decodeByteArray(rawArt, 0, rawArt.length, bfo);
                   bitmap2 = Bitmap.createScaledBitmap(bitmap2, (int) ht_px, (int) wt_px, true);
                   detail.setIcon(bitmap2);
               } else {  
                   detail.setIcon(bitmap3);
               }

               detail.setSong(files[i].getName()); 
               detail.setArtist(files[i].getName());
               detail.setArtist( mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST)); 
               detail.setAlbum( mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM)); 
               detail.setPath2( files[i].getPath()) ;
               songs.add(detail); 
            } else if (files[i].isDirectory()) { 
                songs.addAll(getSongsFromDirectory(files[i])); 
            } 

        }
        return songs;
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);      
        info = (AdapterContextMenuInfo) menuInfo;
        menu.add(Menu.NONE, v.getId(), 0, "Play");
        menu.add(Menu.NONE, v.getId(), 0, "Delete");
        menu.add(Menu.NONE, v.getId(), 0, "Queue Item");                  
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        if (item.getTitle() == "Play") {

        } else if (item.getTitle() == "Delete") {

        } else if (item.getTitle() == "Queue Item") {

        } else {
            return false;
        }
            return true;
    }
}

class Mp3Filter implements FileFilter {
    public boolean accept(File file) {
        return (file.isDirectory()||file.getName().endsWith(".mp3")|| file.getName().endsWith(".Mp3"));
    }
}

解决方案

Check out this tutorial:

http://www.srikanthtechnologies.com/blog/android/audioplayer.aspx

You can modify it slightly to suit your needs:

private ArrayList<SongDeatils> getSongList(File musicFolder) {
    ArrayList<SongDeatils> songs = new ArrayList<SongDeatils>();

    for (File f : musicFolder.listFiles()) {
        MediaMetadataRetriever md = new MediaMetadataRetriever();
        md.setDataSource(musicFolder + "/" + f.getName());

        // Assign variables like title, artist, etc

        SongDeatils s = new SongDeatils();
        s.setTitle(title);
        s.setArtist(artist);
        s.setSong(f.getPath());
        // ...

        songs.add(s);
    }     

    return songs;
}

For image (cover art) handling, it should really be done asynchronously in the adapter. I'd suggest using Universal Image Loader.

Update:

Just saw your comments. What you really want is an efficient way to list songs from a specific album or artist, without using file filters and sorting. The only other option, then, is to use MediaStore/Cursor. There are different types of queries that you can construct, depending on how you are trying to view the data.

So, to query for a list of artist, you would use MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI and use the artist name as your selection args.

For a list of albums, you now have the ARTIST_KEY which you can use to query MediaStore.Audio.Artists.Albums.EXTERNAL_CONTENT_URI, to obtain a list of albums for the given artist.

For an example of how to list all albums for a given artist, see here.

这篇关于如何获得在Android中,从专辑/歌手的歌曲,用类MediaMetadataRetriever?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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