Question

问题是当我选择任何大学时，我在自动完成文本视图中设置了名称。但我也在寻找从密钥值对中的服务器获取的ID：

"u_id": "1","university_name": "RGPV"`

我想要u_id以及name。但我只是得到这个名字。我需要u-id用于进一步的目的。

我如何获得此ID？

以下是获取json的代码

class FetchUniversitytask extends AsyncTask<Void,Void ,String> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();

      /*  progressDialog = new ProgressDialog(ActivitySignUp.this);
        progressDialog.setIndeterminate(true);
        progressDialog.setMessage("Please Wait...");
        progressDialog.show();*/

        linearLayout.setVisibility(View.VISIBLE);
        ObjectAnimator flip = ObjectAnimator.ofFloat(imgSpoon, "rotationY", 0f, 180f);
        flip.setDuration(800);
        flip.setRepeatCount(Animation.INFINITE);
        flip.start();
    }

    @Override
    protected String doInBackground(Void... params) {
        String result = WebServiceUtil.getInstance(ActivitySignUp.this).getJsonFromGetMethod(URLconstant.UNIVERSITY);
        return result;
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        //progressDialog.dismiss();
        linearLayout.setVisibility(View.INVISIBLE);

        if (null != result) {
            try {
                final Universitydata univHolder = new Gson().fromJson(result, Universitydata.class);
                if ( null != univHolder) {
                    //  Log.d("uninholder", "" + univHolder.toString());
                    // Toast.makeText(ActivitySignUp.this, univHolder.toString(), Toast.LENGTH_SHORT).show();
                    Universitylist = new ArrayList<>();
                    for (University university  : univHolder.getData()) {
                        if (!university.getUniversityName().isEmpty()) {
                            Universitylist.add(university.getUniversityName());

                        }
                    }
                    if (Universitylist.size() > 0) {
                        /*  universityAdapter = new ArrayAdapter<String>(ActivitySignUp.this, R.layout.spinner_item, Universitylist);
                            universityAdapter.setDropDownViewResource(R.layout.spinner_itemforchild);*/
                        sadapter = new ArrayAdapter<String>(ActivitySignUp.this, android.R.layout.simple_dropdown_item_1line, Universitylist);
                        suuniversity.setThreshold(1);//will start working from first character
                        suuniversity.setAdapter(sadapter);//setting the adapter data into the AutoCompleteTextView
                        suuniversity.setTextColor(getColor(R.color.colorPrimary));
                        suuniversity.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                            @Override
                            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                                Log.d("univ", String.valueOf(adapterView.getItemAtPosition(i)));
                                Log.d("univ", String.valueOf(adapterView));
                                String data = (String)adapterView.getItemAtPosition(i);
                                int realPosition = Universitylist.indexOf(data);
                                University un = new University();
                                un.getUId();
                                u_id = String.valueOf(realPosition+1);
                                Log.d("univ_id",u_id);
                                fetchCollegeFromServerByUniversityName(u_id);
                            }
                        });                       
                    }
                } else {
                    Toast.makeText(ActivitySignUp.this, "Something not right  1", Toast.LENGTH_SHORT).show();
                }
            } catch (JsonSyntaxException e) {
                e.printStackTrace();
                Toast.makeText(ActivitySignUp.this, "Something not right  2", Toast.LENGTH_SHORT).show();
            }
        } else {
            Toast.makeText(ActivitySignUp.this, "Something not right  3", Toast.LENGTH_SHORT).show();
        }
    }
}

这是我的json代码

{
"data": [
    {
        "u_id": "1",
        "university_name": "RGPV"
    },
    {
        "u_id": "2",
        "university_name": "Samrat Ashok Technological Institute, Vidisha"
    },
    {
        "u_id": "3",
        "university_name": "Jabalpur Engineering College"
    },
    {
        "u_id": "4",
        "university_name": "Rewa Engineering College"
    },
    {
        "u_id": "5",
        "university_name": "University Institute of Technology, Shahdol\t"
    },
    {
        "u_id": "6",
        "university_name": "Indira Gandhi Engineering College, Sagar"
    },
    {
        "u_id": "7",
        "university_name": "Ujjain Engineering College"
    },
    {
        "u_id": "8",
        "university_name": "Shri Govindram Seksaria Institute of Technology and Science (SGSITS), Indore"
    },
    {
        "u_id": "9",
        "university_name": "University Institute of Technology, Jhabua"
    },
    {
        "u_id": "10",
        "university_name": "Madhav Institute of Technology & Science, Gwalior"
    },
    {
        "u_id": "11",
        "university_name": "University Institute of Technology, Bhopal"
    }
]

}

Answer 1

您只有university.getUniversityName()添加到适配器的事实意味着您无法提取ID。

您应该创建一个ArrayAdapter<University>并在University类中实现一个toString方法，该方法返回名称（如果您想查看它，还可以选择ID）

List<University> universities = new ArrayList<>();
ArrayAdapter<University> adapter = new ArrayAdapter<>(ActivitySignUp.this, R.layout.universiry_dropdown_layout, universities);

suuniversity.setAdapter(adapter);
adapter.setDropDownViewResource(R.layout.spinner_itemforchild);

for (University university  : univHolder.getData()) {
    if (!university.getUniversityName().isEmpty()) {
        adapter.add(university);
    }
}

如何从服务器获取数据时从自动完成textview获取所选项目的数据（id，name）

1 个答案: