Question

我是Android中的新手。我想要存储微调器选择的项目ID，它保存在mysql数据库中。我已经将mysql数据库中的项目检索到我的spinner.Now我想将该微调器选择的项目id存储在全局变量中。请帮我。这是我的代码

AddProject

 RequestQueue requestQueue;
private ArrayList<Category> categoriesList;

// Url to get all categories
private String URL_COMPANY = "http://www.mybusket.com/pmsapp/webs/get_all_company.php";
//Data add
private String INSERT_URL = "http://192.168.1.9:8082/pmsapp/pmsemp/webapi/project_add.php";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add_project);

    Spinner = (Spinner) findViewById(R.id.spinner);
    ProjectName = (EditText)findViewById(R.id.projectName);
    IsBilling = (EditText)findViewById(R.id.IsBilling);
    BillingBy = (EditText)findViewById(R.id.billingBy);
    ProjectDes = (EditText)findViewById(R.id.projectDescription);

    Save = (Button)findViewById(R.id.save);

    requestQueue = Volley.newRequestQueue(getApplicationContext());

    categoriesList = new ArrayList<Category>();

    // spinner item select listener
    Spinner.setOnItemSelectedListener(this);
    new GetCompany().execute();

}


/**
 * Adding spinner data
 * */
private void populateSpinner() {
    List<String> lables = new ArrayList<String>();

    for (int i = 0; i < categoriesList.size(); i++) {
        lables.add(categoriesList.get(i).getName());
    }

    // Creating adapter for spinner
    ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_spinner_item, lables);

    // Drop down layout style - list view with radio button
    spinnerAdapter
            .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    // attaching data adapter to spinner
    Spinner.setAdapter(spinnerAdapter);
}

private class GetCompany extends AsyncTask<Void, Void, Void> {

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

    @Override
    protected Void doInBackground(Void... voids) {

        ServiceHandler jsonParser = new ServiceHandler();
        String json = jsonParser.makeServiceCall(URL_COMPANY, ServiceHandler.GET);

        Log.e("Response: ", "> " + json);

        if (json != null) {

            try {
                JSONObject jsonObj = new JSONObject(json);
                if (jsonObj != null) {

                    JSONArray categories = jsonObj.getJSONArray("categories");
                    for (int i = 0; i < categories.length(); i++) {
                        JSONObject catObj = (JSONObject) categories.get(i);
                        Category cat = new Category(catObj.getInt("companyid"),
                                catObj.getString("companyname"));


                        categoriesList.add(cat);
                    }

                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

        }else {
            Log.e("JSON Data", "Didn't receive any data from server!");
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        super.onPostExecute(result);
        populateSpinner();
    }
}

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

    //Toast.makeText(getApplicationContext(), parent.getItemAtPosition(position).toString() + " Selected" , Toast.LENGTH_LONG).show();

}

我想在从微调器中选择一个项目时存储该公司ID。请帮助我。

Answer 1

使用此代码即可获得ID

categoriesList.get(Spinner.getSelectedItemPosition()).getId();

Ex：在Spinner onItemSelected方法

中写下代码

@Override
public void onItemSelected(AdapterView<?> parent, View view, int    position, long id) {

    Toast.makeText(getApplicationContext(), categoriesList.get(position).getId() + " Selected" , Toast.LENGTH_LONG).show();

}

从mysql数据库中获取微调器选定的项ID

1 个答案: