Java 从firebase检索数据的Android代码

以下是firebase中的数据。我必须检索employee中的唯一路径字段，并将其存储在android中的数组中

 myfirebaselink
     user
      employee
        -KAZY5627P4MjLBa3Ae-
          DateTime: "2016-02-15 16:18:20"
          Latitude: "11.0318354"
          Longitude: "11.0318354"
          Path: "/storage/emulated/0/DCIM/100ANDRO/DSC_0070.JPG"
          Seqno: "1"
       -KAZZcBscTCAon8ShoXa
          DateTime: "2016-02-15 16:25:02"
          Latitude: "11.0318501"
          Longitude: "11.0318501"
          Path: "/storage/emulated/0/DCIM/100ANDRO/DSC_0071.JPG"
          Seqno: "2"

代码：

public void onDataChange(DataSnapshot arg0) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(), "data change",Toast.LENGTH_SHORT).show();

                System.out.println("There are " + arg0.getChildrenCount()+ " blog posts");  

                for (DataSnapshot postSnapshot : arg0.getChildren()) {

                    Toast.makeText(getApplicationContext(), "call blogpost",Toast.LENGTH_SHORT).show();

                    BlogPost post = postSnapshot.getValue(BlogPost.class);

                    Toast.makeText(getApplicationContext(), "getting value",Toast.LENGTH_SHORT).show();

                    System.out.println(post.getLatitude() + " - " + post.getSeqno());
                    tv1.setText(post.getLatitude() + " - " + post.getSeqno());
                }
            }

BlogPsot是一个包含get和set方法的类。

---

我已经尝试了firebase.com中提供的方法，但它对我不起作用。有谁能帮我更好地粘贴您尝试的代码并显示任何回溯，或者解释说“它对我不起作用”是的，先生，我添加了代码