我的拍摄图像和保存到SD卡和显示在列表,但在这里我需要一个小的变化,的还是我老在上面,最迟在底部的,所以现在的的我想告诉张最新画面,顶部的的datetimestamp使用作为文件名的一部分的基础
I am capturing images, then storing into SD Card and showing in a List, but here i need a small change, still i am getting old on top and latest at bottom, so now i want to show latest picture on the top on the basis of datetimestamp using as a part of file name.
UploadActivity.java code: -
UploadActivity.java code:-
String fileName;
static List <String> ImageList;
/*** Get Images from SDCard ***/
ImageList = getSD();
// ListView and imageAdapter
lstView = (ListView) findViewById(R.id.listView1);
lstView.setAdapter(new ImageAdapter(this));
}
public static List <String> getSD()
{
List <String> it = new ArrayList <String>();
String string = "/mnt/sdcard/Pictures/SamCam/";
f = new File (string+ CameraLauncherActivity.folder+ "/");
files = f.listFiles ();
for (int i = 0; i < files.length; i++)
{
file = files[i];
Log.d("Count",file.getPath());
it.add (file.getPath());
}
return it;
}
public class ImageAdapter extends BaseAdapter
{
private Context context;
public ImageAdapter(Context c)
{
// TODO Auto-generated method stub
context = c;
}
注意:我使用的,而储存我的图像转换成SD卡的日期/时间戳记
Note: I am using date/timestamp while storing my images into SD Card.
所以最后它看起来是这样的:
so finally it looks like this:
AU_20140328163947_1_4_X-1-4-006.jpg
和仍文件列表在下面的格式,如下图所示:
and still files listing in below format, like below:
AU_20140328163947_1_4_X-1-4-006.jpg
AU_20140328163948_1_4_X-1-4-007.jpg
AU_20140328163949_1_4_X-1-4-008.jpg
但我要列出文件以下格式: -
but i want to list files in below format:-
AU_20140328163949_1_4_X-1-4-008.jpg
AU_20140328163948_1_4_X-1-4-007.jpg
AU_20140328163947_1_4_X-1-4-006.jpg
code删除图像中的列表: -
// btnDelete
final ImageButton btnDelete = (ImageButton) convertView.findViewById(R.id.btnDelete);
btnDelete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
// set title
alertDialogBuilder.setTitle("Delete Image");
// Setting Icon to Dialog
alertDialogBuilder.setIcon(R.drawable.ic_launcher);
// set dialog message
alertDialogBuilder
.setMessage("Are you sure you want to delete this image?")
.setCancelable(false)
.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, close
// current activity
// to get fileName
fileName = ImageList.get(position).toString().substring(strPath.lastIndexOf('/')+1, strPath.length());
// to get SD card path (Folders+fileName)
String fileToDelete = Environment.getExternalStorageDirectory().getPath() +"/Pictures/SamCam/" + CameraLauncherActivity.folder+ "/" + fileName;
Log.d("FileToDelete", fileToDelete);
File myFile = new File(fileToDelete);
// if image exists
if(myFile.exists())
// delete image
myFile.delete();
// get position and delete
ImageList.remove(position);
// to refresh the view
((BaseAdapter) lstView.getAdapter()).notifyDataSetChanged();
dialog.cancel();
}
})
.setNegativeButton("Cancel",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
// TODO Auto-generated method stub
}
});
return convertView;
}
}
如果你收到相反的顺序,您可以使用反向环路数据。
解决方案尝试下面循环
Try below loop
而不是
for (int i = 0; i < files.length; i++)
{
file = files[i];
Log.d("Count",file.getPath());
it.add (file.getPath());
}
或排序与特定领域的数据
排序阵列中的数据。
Arrays.sort(files, new Comparator<Object>()
{
public int compare(Object o1, Object o2) {
if (((File)o1).lastModified() > ((File)o2).lastModified()) {
return -1;
} else if (((File)o1).lastModified() < ((File)o2).lastModified()) {
return +1;
} else {
return 0;
}
}
});
for (int i = 0; i < files.length; i++)
{
file = files[i];
Log.d("Count",file.getPath());
it.add (file.getPath());
}