本文介绍了显示所有歌曲从SD卡类型智者的处理方法，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
我在做Musicplayer应用。而要显示所有的歌曲就其类型。如果可能的话，请给我一些暗示了点。我能够显示所有的宋相对于歌手和专辑，但面临的问题，同时去为体裁明智的歌曲。我放出来显示是在每一个流派catagory所有歌曲。它不是saprating宋据流派。我的code是下面。LocalGenre.java
I am Doing Musicplayer Application. and want to show All the Songs with respect to its Genre. if possible then please give me some hint for that. i able to display all the Song With Respect to Artist and Album but Facing Problem While Going For Genre Wise Song. my out put is displaying all the Songs in Each genre catagory. it is not saprating the Song According to genre. Mycode is Below.LocalGenre.java
package com.PageViewerTilesDemo.src;
import java.util.ArrayList;
import android.app.Activity;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.Window;
import android.widget.ExpandableListView;
import android.widget.TextView;
public class LocanGenre extends Activity {
ExpandableListView listLocalArtists;
TextView txttitle;
Cursor musiccursor, musiccursor1;
int music_column_index, music_column_index1;
int count, count1;
ArrayList<String> genresName = new ArrayList<String>();
ArrayList<String> genreID = new ArrayList<String>();
ArrayList<Integer> albumID = new ArrayList<Integer>();
ArrayList<String> numberOFSongs = new ArrayList<String>();
ArrayList<String> artistName = new ArrayList<String>();
ArrayList<String> path = new ArrayList<String>();
ArrayList<String> path12 = new ArrayList<String>();
ArrayList<ArrayList<String>> pathDisplay = new ArrayList<ArrayList<String>>();
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.localartists);
txttitle = (TextView) findViewById(R.id.title);
txttitle.setText("Genres");
listLocalArtists = (ExpandableListView) findViewById(R.id.listView1);
init_phone_music_grid();
listLocalArtists.setAdapter(new ExpandableListGenreAdapter(this, path, genresName,
genresName, pathDisplay,albumID));
}
private void init_phone_music_grid() {
// TODO Auto-generated method stub
System.gc();
String[] proj = {
MediaStore.Audio.Media._ID,
MediaStore.Audio.Media.DISPLAY_NAME,
MediaStore.Audio.Media.ALBUM_ID};
musiccursor1 = managedQuery(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, proj, null, null,
null);
count1 = musiccursor1.getCount();
if (count1 > 0) {
musiccursor1.moveToFirst();
do {
music_column_index1 = musiccursor1
.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME);
String filename0 = musiccursor1.getString(music_column_index1);
path.add(filename0);
Log.i("LocalGenres ", "Path Main" + path);
music_column_index1 = musiccursor1
.getColumnIndexOrThrow(MediaStore.Audio.Media._ID);
String filename123 = musiccursor1
.getString(music_column_index1);
path12.add(filename123);
Log.i("LocalGenre", "Media ID " + path12);
music_column_index1 = musiccursor1
.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM_ID);
int filename1 = musiccursor1.getInt(music_column_index1);
albumID.add(filename1);
Log.i("LOCAL Genres!!!", " ALBUM ID" + albumID);
} while (musiccursor1.moveToNext());
}
String[] projection = { MediaStore.Audio.Genres._ID,
MediaStore.Audio.Genres.NAME};
musiccursor = managedQuery(
MediaStore.Audio.Genres.EXTERNAL_CONTENT_URI, projection, null,
null, null);
genresName.clear();
count = musiccursor.getCount();
if (count > 0) {
musiccursor.moveToFirst();
do {
music_column_index = musiccursor
.getColumnIndexOrThrow(MediaStore.Audio.Genres._ID);
String filename = musiccursor.getString(music_column_index);
if(!genreID.contains(filename))
{
genreID.add(filename);
}
Log.i("Local Genres ", "Genre ID" + genreID);
music_column_index = musiccursor
.getColumnIndexOrThrow(MediaStore.Audio.Genres.NAME);
String filename1 = musiccursor.getString(music_column_index);
if(!genresName.contains(filename1))
{
genresName.add(filename1);
}
Log.i("Local Genres ", "Genres Name " + genresName);
/*
* music_column_index = musiccursor
* .getColumnIndexOrThrow(MediaStore.Audio.Genres._COUNT);
*
* String filename3 = musiccursor.getString(music_column_index);
* artistName.add(filename3);
*
* Log.i("Local Albums ", "Album ID for Gen " + artistName);
*/
} while (musiccursor.moveToNext());
}
for (int j = 0; j < genreID.size(); j++) {
ArrayList<String> arr = new ArrayList<String>();
for (int i = 0; i < path12.size(); i++) {
Log.i("EEEEEE", "Inside If path12.get(i) :"+path12.get(i));
Log.i("EEEEEE", "Inside If genreID.get(j) :"+genreID.get(j));
Log.i("EEEEEE", "Inside If Integer.parseInt(path12.get(i)) :"+Integer.parseInt(path12.get(i)));
Log.i("EEEEEE", "Inside If j : "+j);
if (path12.get(i).equalsIgnoreCase(genreID.get(j)) || Integer.parseInt(path12.get(i))>j) {
Log.i("EEEEEE", "Inside If");
arr.add(path.get(i));
}
else
Log.i("xxxxxxx", "Inside else");
arr.add(path.get(i));
}
Log.i("EEEEEE", "Inside outerloop " + arr);
pathDisplay.add(arr);
}
}
}
ExpandableListGenreAdapter.java
ExpandableListGenreAdapter.java
package com.PageViewerTilesDemo.src;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class ExpandableListGenreAdapter extends BaseExpandableListAdapter{
private Context context;
private ArrayList<String> artist;
private ArrayList<String> genres;
private ArrayList<ArrayList<String>> children;
public ArrayList<String> pathmain ;
public ArrayList<Integer> genresID;
public ArrayList<Integer> albumID;
public ExpandableListGenreAdapter(Context context, ArrayList<String> path, ArrayList<String> groups,ArrayList<String> artist,
ArrayList<ArrayList<String>> children, ArrayList<Integer> albumID) {
this.context = context;
this.genres = groups;
this.artist = artist;
this.pathmain = path;
this.children = children;
this.albumID=albumID;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return children.get(groupPosition).get(childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition;
}
/*public Bitmap getAlbumart(int album_id)
{
Bitmap bm = null;
try
{
final Uri sArtworkUri = Uri
.parse("content://media/external/audio/albumart");
Uri uri = ContentUris.withAppendedId(sArtworkUri, album_id);
ParcelFileDescriptor pfd = context.getContentResolver()
.openFileDescriptor(uri, "r");
if (pfd != null)
{
FileDescriptor fd = pfd.getFileDescriptor();
bm = BitmapFactory.decodeFileDescriptor(fd);
}
} catch (Exception e) {
}
return bm;
}*/
@Override
public View getChildView(final int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
final String vehicle = (String) getChild(groupPosition, childPosition);
Log.i("ExpandableListAdapter", "Group Position "+groupPosition);
Log.i("ExpandableListAdapter", "Vehicle "+vehicle);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.child_layout, null);
}
TextView tv = (TextView) convertView.findViewById(R.id.tvChild);
ImageView imageview1=(ImageView)convertView.findViewById(R.id.ImageView01);
// bm=getAlbumart(albumids.get(1));
// Log.i("LIST ADAPTER","@@@@@@@@@@@@@@@@@@@ALBUM IDS "+albumids.get(0)+"BITMAPPPPP@@@"+bm);
// imageview1.setImageBitmap(coverart.get(childPosition));
tv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
MainActivity.flag = true;
TestFragment3.flag = true;
Firstpage.flag = true;
Log.i("ExpandableListGenreAdapter", "path "+childPosition);
MainActivity.currentPosition = groupPosition;
Log.i("ExpandableListGenreAdapter", "currentPosition "+MainActivity.currentPosition);
MainActivity.genre=true;
MainActivity.currentgenreposition = albumID.get(childPosition);
Log.i("ExpandableListGenreAdapter", "currentGenrePosition "+MainActivity.currentgenreposition);
MainActivity.Media_full_path = "/sdcard/"+vehicle;
Log.i("ExpandableListAdapter", "Onclick "+MainActivity.Media_full_path);
((Activity)context).finish();
}
});
tv.setText(" " + vehicle.toString());
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return children.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return genres.get(groupPosition);
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return genres.size();
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String group = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.group_layout, null);
}
TextView txtArtistsName = (TextView) convertView.findViewById(R.id.txtArtistsName);
TextView txtartistssongs = (TextView) convertView.findViewById(R.id.txtartistssongs);
txtArtistsName.setText(group);
txtartistssongs.setText(genres.get(groupPosition)+" Song(s)");
return convertView;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return true;
}
}
请建议我在哪里，我从上面的code失踪。谢谢你。
Please Suggest me Where is i am missing from the Above Code. Thank You.
推荐答案
嗨希望这会帮助你。它显示的流派和他们的歌曲。
Hi hope this will help you. It displays the genres and their songs.
int index;
long genreId;
Uri uri;
Cursor genrecursor;
Cursor tempcursor;
String[] proj1 = {MediaStore.Audio.Genres.NAME, MediaStore.Audio.Genres._ID};
String[] proj2 = {MediaStore.Audio.Media.DISPLAY_NAME};
genrecursor = managedQuery(MediaStore.Audio.Genres.EXTERNAL_CONTENT_URI, proj1, null, null, null);
if (genrecursor.moveToFirst()) {
do {
index = genrecursor.getColumnIndexOrThrow(MediaStore.Audio.Genres.NAME);
Log.i("Tag-Genre name", genrecursor.getString(index));
index = genrecursor.getColumnIndexOrThrow(MediaStore.Audio.Genres._ID);
genreId = Long.parseLong(genrecursor.getString(index));
uri = MediaStore.Audio.Genres.Members.getContentUri("external", genreId);
tempcursor = managedQuery(uri, proj2, null,null,null);
Log.i("Tag-Number of songs for this genre", tempcursor.getCount() + "");
if (tempcursor.moveToFirst()) {
do {
index = tempcursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME);
Log.i("Tag-Song name", tempcursor.getString(index));
} while(tempcursor.moveToNext());
}
} while(genrecursor.moveToNext());
}
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