从SDCARD显示歌曲 [英] show songs from SDCARD

问题描述

我要显示从SD卡中的歌曲列表视图，但它给部队关闭。
任何一个可以帮助我的。
code：

 包com.ex.imageGallery;进口的java.io.File;进口android.app.Activity;
进口android.content.Intent;
进口android.graphics.drawable.ColorDrawable;
进口android.net.Uri;
进口android.os.Bundle;
进口android.os.Environment;
进口android.view.View;
进口android.widget.AdapterView;
进口android.widget.AdapterView.OnItemClickListener;
进口android.widget.ArrayAdapter;
进口android.widget.ImageView;
进口android.widget.ListView;
进口java.io.FilenameFilter;公共类audioList延伸活动{
 @覆盖
    公共无效的onCreate（捆绑savedInstanceState）{
     乌里[] mUrls;
    的String [] mFiles = NULL;
        super.onCreate（savedInstanceState）;        的setContentView（R.layout.audio_list）;
        LV的ListView;
        LV =（ListView控件）findViewById（R.id.LV）;
        / *文件首页= Environment.getDataDirectory（）;
        文件[] = audioList home.listFiles（新的FilenameFilter（）{            公共布尔接受（文件目录，字符串名称）{
                // TODO自动生成方法存根
                回报（name.endsWith（MP3））;
            }
        }）;
        mFiles =新的String [audioList.length]
        的for（int i = 0; I＆LT; audioList.length;我++）
        {
            mFiles [I] = audioList [I] .getAbsolutePath（）;
        }
        mUrls =新的URI [mFiles.length]
        的for（int i = 0; I＆LT; mFiles.length;我++）
        {
            mUrls [I] = Uri.parse（mFiles [I]）;
        }
        lv.setAdapter（新ArrayAdapter＆LT;串GT;（audioList.this，R.layout.new_list，mFiles））;
        lv.setDividerHeight（2）;
        lv.setTextFilterEnabled（真）; * /
 }
 }
 

解决方案

媒体文件由系统，所以你需要使用查询检索媒体自动注册。

 最后光标光标= managedQuery（MediaStore.Audio.Media.EXTERNAL_CONTENT_URI，
     新的String [] {} MediaStore.Audio.Media.DISPLAY_NAME，NULL，NULL，NULL）;
 

加载光标。要在ListView显示它您需要使用 SimpleCursorAdapter 显示ListView中的数据。

I want to show songs from sdcard in listview but it gives Force Close. Can any one help me for this. Code:

package com.ex.imageGallery;

import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.graphics.drawable.ColorDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import java.io.FilenameFilter;

public class audioList extends Activity{


 @Override
    public void onCreate(Bundle savedInstanceState) {
     Uri[] mUrls;
    String[] mFiles=null; 
        super.onCreate(savedInstanceState);

        setContentView(R.layout.audio_list);
        ListView lv;
        lv = (ListView)findViewById(R.id.LV);
        /*File home = Environment.getDataDirectory();
        File[] audioList = home.listFiles(new FilenameFilter() {

            public boolean accept(File dir, String name) {
                // TODO Auto-generated method stub
                return(name.endsWith(".mp3"));
            }
        });
        mFiles = new String[audioList.length];
        for(int i=0;i<audioList.length;i++)
        {
            mFiles[i] = audioList[i].getAbsolutePath();
        }
        mUrls = new Uri[mFiles.length];
        for(int i=0;i<mFiles.length;i++)
        {
            mUrls[i] = Uri.parse(mFiles[i]);
        }
        lv.setAdapter(new ArrayAdapter<String>(audioList.this,R.layout.new_list,mFiles));
        lv.setDividerHeight(2);
        lv.setTextFilterEnabled(true); */
 }
 }

解决方案

Media files are automatically registered by the system so you need to use a query to retrieve the media.

final Cursor cursor = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, 
     new String[] { MediaStore.Audio.Media.DISPLAY_NAME }, null, null, null);

That loads a cursor. To display it in a ListView you will need to use SimpleCursorAdapter to display the data in the ListView.

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