如何在我的画廊中创建空文件夹？

Question

1. 如何在图库中创建文件夹

2. 第一，我需要在图库中创建一个空文件夹 这是我的任务简单的文件夹创建无需在我的文件夹中共享图像，第一我想在图库中查看文件夹....现在我的图库显示了大量的图像....

   package galleryview.galleryview;
   
   import java.io.File;
   
   import android.app.Activity;
   import android.content.Context;
   import android.content.Intent;
   import android.database.Cursor;
   import android.net.Uri;
   import android.os.Bundle;
   import android.os.Environment;
   import android.provider.MediaStore;
   import android.view.View;
   import android.view.ViewGroup;
   import android.widget.AdapterView;
   import android.widget.BaseAdapter;
   import android.widget.Gallery;
   import android.widget.GridView;
   import android.widget.ImageView;
   import android.widget.AdapterView.OnItemClickListener;
   
   public class Galleryview extends Activity {
    /** Called when the activity is first created. */
   private Cursor imagecursor, actualimagecursor;
   private int image_column_index, actual_image_column_index;
   GridView imagegrid;
   private int count;
   @Override
   public void onCreate(Bundle savedInstanceState) {
   
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       init_phone_image_grid();
   }
   private void init_phone_image_grid() {
     File mFile=new File("/sdcard/photos/newfolder");
     mFile.mkdir();
       String[] img = { MediaStore.Images.Thumbnails._ID };
       imagecursor = managedQuery(
   MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, img, null,
   null, MediaStore.Images.Thumbnails.IMAGE_ID + "");
       image_column_index = imagecursor
   .getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
       count = imagecursor.getCount();
       imagegrid = (GridView) findViewById(R.id.PhoneImageGrid);
       imagegrid.setAdapter(new ImageAdapter(getApplicationContext()));
       imagegrid.setOnItemClickListener(new OnItemClickListener(){
             public void onItemClick(AdapterView parent, View v,
    int position, long id) {
                   System.gc();
                   String[] proj = { MediaStore.Images.Media.DATA };
                   actualimagecursor = managedQuery(
   MediaStore.Images.Media.EXTERNAL_CONTENT_URI, proj,
   null, null, null);
                   actual_image_column_index = actualimagecursor
   .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                   actualimagecursor.moveToPosition(position);
                   String i = actualimagecursor.getString(actual_image_column_index);
                   System.gc();
                  // Intent intent = new Intent(getApplicationContext(),  
                  ViewImage.class);
                  //Intent intent=new Intent(Intent.ACTION_PICK);
                  //intent.setDataAndType(Uri.parse("file:///sdcard/"), "images/*");
                  //startActivityForResult(intent, 1);
           Intent intent = new Intent(getApplicationContext(),   
           ViewImage.class);
   
                  intent.putExtra("filename", i);
                  startActivity(intent);
                                                           }
       });
       }
   
   
     public class ImageAdapter extends BaseAdapter {
       private             Context mContext;
   
   
         public ImageAdapter(Context c) {
             mContext = c;
       }
       public int getCount() {
             return count;
       }
       public Object getItem(int position) {
             return position;
       }
       public long getItemId(int position) {
             return position;
       }
       public View getView(int position,View convertView,ViewGroup parent) {
             System.gc();
             ImageView i = new ImageView(mContext.getApplicationContext());
             if (convertView == null) {
                   imagecursor.moveToPosition(position);
                   int id = imagecursor.getInt(image_column_index);
                   i.setImageURI(Uri.withAppendedPath(
   MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, ""
   + id));
                   i.setScaleType(ImageView.ScaleType.CENTER_CROP);
                   i.setLayoutParams(new GridView.LayoutParams(110,110));
             }
             else {
                   i = (ImageView) convertView;
             }
             return i;
       }
    }
       } 
   

Answer 1

用于在SD卡中创建新文件夹..

File wallpaperDirectory = new File("/sdcard/NewFolder/");
wallpaperDirectory.mkdirs();