【发布时间】：2018-09-16 03:02:45
【问题描述】：
在我的应用程序中，我正在使用两个微调器，第一个微调器包含 Department 和 id 等数据，第二个微调器包含 deficiency 和 id，这里我正在使用一些 URL如下。
http://182.18.163.39/m/def.php?issue=1
此 URL 为我提供了第一个微调器值。从第一个微调器中选择一个值时，与该值相关的数据将进入第二个微调器。
这是我的第二个 URL，它提供了第二个微调器值。
"http://182.18.163.39/m/def.php?issue=2&dept="+dept_id
在这个 URL 中，我想从第一个 URL 传递 id，这是我的问题，我能够从第一个微调器获取所有值。当我从第一个微调器中选择一个值时，它不会在第二个微调器中为我提供相关值。 任何人都可以给我一个示例代码来解决这个问题。
代码如下：
//Department spinner
Spinner spinner;
String URL="http://182.18.163.39/train/m/def.php?issue=1";
ArrayList<String> Department;
String uid;
//Deficiency category spinner
Spinner spinner2;
String URL2 = "http://182.18.163.39/train/m/def.php?issue=2&dept="+dept_id;
ArrayList<String>Deficiency;
String defid;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.new_deficiency);
//spinner for department
Department = new ArrayList<>();
spinner=(Spinner)findViewById(R.id.select_department);
loadSpinnerData(URL);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
String department = spinner.getItemAtPosition(spinner.getSelectedItemPosition()).toString();
Toast.makeText(getApplicationContext(),department,Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
// DO Nothing here
}
});
//spinner for deficiency
Deficiency = new ArrayList<>();
spinner2 = (Spinner)findViewById(R.id.deficiency_category);
loadSpinnerDeficiency(URL2);
spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
String deficiency = spinner2.getItemAtPosition(spinner2.getSelectedItemPosition()).toString();
Toast.makeText(getApplicationContext(),deficiency,Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
// DO Nothing here
}
});
}
private void loadSpinnerData(String url) {
try {
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpPost = new HttpGet(url);
HttpResponse response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
String responseString = EntityUtils.toString(entity);
JSONArray jsonarray = new JSONArray(responseString);
for (int i = 0; i < jsonarray.length(); i++) {
JSONObject jsonobject = jsonarray.getJSONObject(i);
String department = jsonobject.getString("Department");
dept_id = jsonobject.getString("ID");
Department.add(department);
}
spinner.setAdapter(new ArrayAdapter<String>(NewDeficiency.this, android.R.layout.simple_spinner_dropdown_item, Department));
} catch (JSONException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private void loadSpinnerDeficiency(String url2) {
try {
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpPost = new HttpGet("http://182.18.163.39/train/m/def.php?issue=2&dept="+dept_id);
HttpResponse response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
String responseString = EntityUtils.toString(entity);
JSONArray jsonarray = new JSONArray(responseString);
for (int i = 0; i < jsonarray.length(); i++) {
JSONObject jsonobject = jsonarray.getJSONObject(i);
String defcat = jsonobject.getString("Deficiency");
defid = jsonobject.getString("ID");
Deficiency.add(defcat);
}
spinner2.setAdapter(new ArrayAdapter<String>(NewDeficiency.this, android.R.layout.simple_spinner_dropdown_item, Deficiency));
} catch (JSONException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
这是我对第一个 URL 的 json 响应：
[{
"Department": "Select Department",
"ID": ""
}, {
"Department": "Engg North",
"ID": "1"
}, {
"Department": "DIESEL SHED",
"ID": "2"
}, {
"Department": "S & T",
"ID": "3"
}, {
"Department": "SAFETY",
"ID": "4"
}, {
"Department": "Srdenwest",
"ID": "5"
}, {
"Department": "enggwest",
"ID": "6"
}, {
"Department": "Engg central",
"ID": "7"
}, {
"Department": "electmaint",
"ID": "8"
}, {
"Department": "Operating",
"ID": "9"
}, {
"Department": "Security",
"ID": "10"
}, {
"Department": "Diesel Shed",
"ID": "11"
}, {
"Department": "Electric Loco shed",
"ID": "12"
}, {
"Department": "C & W",
"ID": "13"
}, {
"Department": "trso",
"ID": "14"
}, {
"Department": "trdohe",
"ID": "15"
}, {
"Department": "engg",
"ID": "16"
}, {
"Department": "commercial",
"ID": "17"
}, {
"Department": "engg South",
"ID": "18"
}, {
"Department": "Mechanical",
"ID": "19"
}]
这是我对第二个 URL 的 json 响应：
[{
"Deficiency": "Select Deficiency",
"ID": ""
}, {
"Deficiency": "Engg",
"ID": "1"
}, {
"Deficiency": "Track",
"ID": "25"
}, {
"Deficiency": "LCs",
"ID": "26"
}, {
"Deficiency": "Misc",
"ID": "43"
}, {
"Deficiency": "",
"ID": "NULL"
}]
【问题讨论】：
-
请分享您正在使用的代码
-
请添加您的两个请求响应代码。
-
我更新了我的代码
-
我也更新了我的 json 响应
-
它没有给你一个正确的数据，因为你没有更新你的
URL2。尝试将您的loadSpinnerDeficiency(URL2);并更改为loadSpinnerDeficiency(URL2 + departmentId);在您的spinner.setOnItemSelectedListener onItemSelected中。
标签： android json http android-spinner