How To Display Files On The Sd Card In A Listview?

December 14, 2023 Post a Comment

I would like to create a button that when clicked will go to a class that displays all media files from an SD card using a ListView. After selecting from the list it will then retu

Solution 1:

Add a Method GetFiles() to your program. Call it to get an ArrayList<> of all the files. You can then use it to populate your listview. You need to provide String argument DirectoryPath.

The Function:

public ArrayList<String> GetFiles(String DirectoryPath) {
    ArrayList<String> MyFiles = new ArrayList<String>();
    File f = new File(DirectoryPath);

    f.mkdirs();
    File[] files = f.listFiles();
    if (files.length == 0)
        returnnull;
    else {
        for (int i=0; i<files.length; i++) 
            MyFiles.add(files[i].getName());
    }

    return MyFiles;
}

Usage Example:

@OverridepublicvoidonCreate() {
// Other CodeListView lv;
    ArrayList<String> FilesInFolder = GetFiles("/sdcard/somefolder");
    lv = (ListView)findViewById(R.id.filelist);

    lv.setAdapter(newArrayAdapter<String>(this,
        android.R.layout.simple_list_item_1, FilesInFolder));

    lv.setOnItemClickListener(newAdapterView.OnItemClickListener() {
    publicvoidonItemClick(AdapterView<?> parent, View v, int position, long id) {
            // Clicking on items
         }
    });
}

Make sure that the External Storage is Readable:http://developer.android.com/guide/topics/data/data-storage.html#filesExternal

To Filter files based on Name/Extension:How to acces sdcard and return and array with files off a specific format?

Solution 2:

First i strongly suggest you read some tutorials about android first so you get the basics. You have to implement the following to do this

List all media files - How to list all media in Android?
Start new Activity
Android: Capturing the return of an activity

Solution 3:

publicclassFileActivityextendsListActivity {
String str;
ArrayList<String> al;
ArrayAdapter<String> adapter;
ListView lv;

@SuppressLint("SdCardPath")
@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.file_view);
    Intent int1=getIntent();
    ArrayList<String> arr1=GetFiles(Environment.getExternalStorageDirectory().getPath());
    adapter= newArrayAdapter<String>(getApplicationContext(),
                            android.R.layout.simple_expandable_list_item_1,arr1);
    lv = (ListView) findViewById(android.R.id.list);
    lv.setAdapter(adapter);
}  
privateArrayList<String> GetFiles(String path) {
    ArrayList<String> arr2=newArrayList<String>();
    File file=newFile(path);
    File[] allfiles=file.listFiles();
    if(allfiles.length==0) {
        returnnull;
    }
    else {
        for(int i=0;i<allfiles.length;i++) {
            arr2.add(allfiles[i].getName());
        }
    }
 return arr2; 
  }


@OverrideprotectedvoidonListItemClick(ListView l, View v, int position, long id) {
    // TODO Auto-generated method stubsuper.onListItemClick(l, v, position, id);
    }

Solution 4:

Updated function:: use this for new apis

call function like this:

searchForFileInExternalStorage("filename.ext");

@implementation

publicFilesearchForFileInExternalStorage(String filename) {
            File storage = Environment.getExternalStorageDirectory();

            returnsearchForFileInFolder(filename, storage);
        }

        publicFilesearchForFileInFolder(String filename, File folder) {
            File[] children = folder.listFiles();
            File result;

            for (File child : children) {
                if (child.isDirectory()) {
                    result = searchForFileInFolder(filename, child);
                    if (result != null) {
                        return result;
                    }
                } else {
                    // replace equals by equalsIgnoreCase if you want to ignore the// case of the file nameif (child.getName().equals(filename)) {
                        return child;
                    }
                }
            }

            returnnull;
        }

Solution 5:

this is a correct solution for you! or i give you a link for this stuff!

publicclassSongsManager {
// SDCard Path//choose your path for me i choose sdcard
final StringMEDIA_PATH = newString("/sdcard/");
privateArrayList<hashmap<string, string="">> songsList = newArrayList<hashmap<string, string="">>();

// ConstructorpublicSongsManager(){

}

/**
 * Function to read all mp3 files from sdcard
 * and store the details in ArrayList
 * */publicArrayList<hashmap<string, string="">> getPlayList(){
    File home = newFile(MEDIA_PATH);

    if (home.listFiles(newFileExtensionFilter()).length > 0) {
        for (File file : home.listFiles(newFileExtensionFilter())) {
            HashMap<string, string=""> song = newHashMap<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 arrayreturn songsList;
}

/**
 * Class to filter files which are having .mp3 extension
 * *///you can choose the filter for me i put .mp3classFileExtensionFilterimplementsFilenameFilter {
    publicbooleanaccept(File dir, String name) {
        return (name.endsWith(".mp3") || name.endsWith(".MP3"));
    }
}
 }

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