Android java：如何从图库中获取图像名称

Question

我有ListView，相机按钮，从图库按钮和保存按钮中选择。 从ListView保存图像已完成工作。但我需要画廊中的原始图像名称而不是自己输入名称。有什么建议吗？

以下是从ListView保存图像的编码：

  public void onClick(DialogInterface dialog, int which) { 
     String dateN = getIntent().getStringExtra("the_date");
    View content = findViewById(R.id.imgView);
    content.setDrawingCacheEnabled(true);
    Bitmap bitmap = content.getDrawingCache();
    File root = Environment.getExternalStorageDirectory();
    File cachePath = new File(root.getAbsolutePath() + "/CalendarNote/" + dateN + "01.jpg");
    boolean success = true; 
    try 
    {
        cachePath.createNewFile();
        FileOutputStream ostream = new FileOutputStream(cachePath);
        bitmap.compress(CompressFormat.JPEG, 100, ostream);
        ostream.close();
    } 
    catch (Exception e) 
    {
         e.printStackTrace();
     }
    if (success) {
        Toast.makeText(getBaseContext(), "You have successfully saved image." , Toast.LENGTH_SHORT ).show();
    } 
    else {
        Toast.makeText(getBaseContext(), "You have Failed to save." , Toast.LENGTH_SHORT ).show();
    }