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[英]Android Studio music player cant read from sdcard, only internal memory
[英]Music Player will only list music from “/sdcard”
所以我建立了我的音乐剧,终于可以了。 感谢这里的一些特别的人。 但是起初我运行了该应用程序,它不会显示任何音乐。 因此,我查看了我的代码,并说了最后的字符串MEDIA_PATH =(“ / sdcard”); -我知道,不要硬编码,但是。 所以我去了我的设备,然后将一些音乐移到了SD卡的根目录。 打开该应用程序,并在音乐中列出了“ Woohoo”。
但是,我现在的问题是,如何让我的应用列出SD卡中的所有音乐? 不仅仅是从单个目录。 :) 谢谢。
这是我在设备上查找音乐的代码-
package com.ascendapps.nexplay;
import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
import java.util.HashMap;
import android.os.Environment;
public class SongsManager {
// SDCard Path
final String MEDIA_PATH = ("/sdcard");
private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
// Constructor
public SongsManager(){
}
/*
* Function to read all mp3 files from sdcard
* and store the details in ArrayList
*/
public ArrayList<HashMap<String, String>> getPlayList(){
File home = new File(MEDIA_PATH);
if (home.listFiles(new FileExtensionFilter())!=null && home.listFiles(new FileExtensionFilter()).length > 0)
{
for (File file : home.listFiles(new FileExtensionFilter())) {
HashMap<String, String> song = new HashMap<String, String>();
song.put("songTitle", file.getName().substring(0, (file.getName().length() - 4)));
song.put("songPath", file.getPath());
// Adding each song to SongList
songsList.add(song);
}
}
// return songs list array
return songsList;
}
/*
* The following class filters all files that have an extension of .mp3||.MP3
*/
class FileExtensionFilter implements FilenameFilter {
public boolean accept(File dir, String name) {
return (name.endsWith(".mp3") || name.endsWith(".MP3"));
}
}
}
谢谢您,我会对此做一些研究,但是我的互联网非常慢,而且我下载了Stackoverflow缓存,因此该网站加载速度更快。 任何帮助,将不胜感激。
cursor = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, cols, null, null, MediaStore.Audio.Media.TITLE + " ASC");
for (int i = 0; i < cursor.getColumnCount(); i++)
Log.d("col_info", cursor.getColumnName(i));
count = cursor.getCount();
cursor.moveToPosition(0);
filePath = cursor.getString(2);
songName = cursor.getString(0);
artist = cursor.getString(3);
tvSongName.setText(songName + "\n" + artist);
ListView lv = (ListView) findViewById(R.id.listView1);
lv.setAdapter(new MusicAdapter(getApplicationContext()));
mediaPlayer = new MediaPlayer();
mediaPlayer.setWakeMode(this,PowerManager.PARTIAL_WAKE_LOCK);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> adapterView, View
view, int i, long l) {
cursor.moveToPosition(i);
filePath = cursor.getString(2);
songName = cursor.getString(0);
artist = cursor.getString(3);
tvSongName.setText(songName + "\n" + artist);
try {
if (mediaPlayer.isPlaying())
mediaPlayer.reset();
mediaPlayer.setDataSource(filePath);
mediaPlayer.prepare();
play();
} catch (IOException e) {
e.printStackTrace();
}
rlContainer.setVisibility(View.GONE);
}
});
希望对您有帮助。 谢谢!!
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