ANDROID>如何使用微调器设置JSON数据(ANDROID > How to set JSON Data with Spinner)
我是新来的，对不起，如果我做一些白痴问题，
为Issues
我已经创建了一个如下所示的应用程序，以及JSON在此链接中获得的微调器中的所有值
当应用程序运行时，会发生这种情况， Spinner
但是我想设置是否有人选择“ardie halim”第二个微调只显示“移动开发人员”，如果有人选择“indah”显示“数据库oracle”的第二个微调，等等
我试图从go * gle找到教程，但我不知道什么是正确的keyword找出来的，
关于我的代码MainActivity.java FYI
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
ArrayList<String> listItems=new ArrayList<>();
ArrayAdapter<String> adapter;
Spinner sp;
ArrayList<String> listItems2=new ArrayList<>();
ArrayAdapter<String> adapter2;
Spinner sp2;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sp=(Spinner)findViewById(R.id.spinner);
sp2=(Spinner)findViewById(R.id.spinner2);
adapter= new ArrayAdapter<>(this, R.layout.spinner_layout, R.id.txt, listItems);
adapter2= new ArrayAdapter<>(this, R.layout.spinner_layout, R.id.txt, listItems2);
sp.setAdapter(adapter);
sp2.setAdapter(adapter2);
}
public void onStart(){
super.onStart();
BackTask bt=new BackTask();
bt.execute();
}
private class BackTask extends AsyncTask<Void,Void,Void> {
ArrayList<String> list;
ArrayList<String> list2;
protected void onPreExecute(){
super.onPreExecute();
list=new ArrayList<>();
list2=new ArrayList<>();
}
protected Void doInBackground(Void...params){
InputStream is=null;
String result="";
try{
HttpClient httpclient=new DefaultHttpClient();
HttpPost httppost= new HttpPost("http://zxccvvv.netne.net/dosen.php");
HttpResponse response=httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
// Get our response as a String.
is = entity.getContent();
}catch(IOException e){
e.printStackTrace();
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));
String line;
while ((line = reader.readLine()) != null) {
result+=line;
}
is.close();
//result=sb.toString();
}catch(Exception e){
e.printStackTrace();
}
// parse json data
try{
JSONArray jArray =new JSONArray(result);
for(int i=0;i<jArray.length();i++){
JSONObject jsonObject=jArray.getJSONObject(i);
// add interviewee name to arraylist
list.add(jsonObject.getString("nama_dosen"));
list2.add(jsonObject.getString("mat_kul"));
}
}
catch(JSONException e){
e.printStackTrace();
}
return null;
}
protected void onPostExecute(Void result){
listItems.addAll(list);
listItems2.addAll(list2);
adapter.notifyDataSetChanged();
adapter2.notifyDataSetChanged();
}
}
}
im new here, sorry if i doing something idiot question,
for the Issues
i already create an app like that below, and all the value in the spinner obtained by JSON in this link
and this happens when the application running, Spinner
but i want to set if someone choose "ardie halim" the 2nd spinner just show "mobile developer", and if someone choose "indah" the 2nd spinner showing "database oracle", and so on
i tried to find the tutorial from go*gle, but i dunno what the right keyword to find out,
FYI about my code MainActivity.java
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
ArrayList<String> listItems=new ArrayList<>();
ArrayAdapter<String> adapter;
Spinner sp;
ArrayList<String> listItems2=new ArrayList<>();
ArrayAdapter<String> adapter2;
Spinner sp2;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sp=(Spinner)findViewById(R.id.spinner);
sp2=(Spinner)findViewById(R.id.spinner2);
adapter= new ArrayAdapter<>(this, R.layout.spinner_layout, R.id.txt, listItems);
adapter2= new ArrayAdapter<>(this, R.layout.spinner_layout, R.id.txt, listItems2);
sp.setAdapter(adapter);
sp2.setAdapter(adapter2);
}
public void onStart(){
super.onStart();
BackTask bt=new BackTask();
bt.execute();
}
private class BackTask extends AsyncTask<Void,Void,Void> {
ArrayList<String> list;
ArrayList<String> list2;
protected void onPreExecute(){
super.onPreExecute();
list=new ArrayList<>();
list2=new ArrayList<>();
}
protected Void doInBackground(Void...params){
InputStream is=null;
String result="";
try{
HttpClient httpclient=new DefaultHttpClient();
HttpPost httppost= new HttpPost("http://zxccvvv.netne.net/dosen.php");
HttpResponse response=httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
// Get our response as a String.
is = entity.getContent();
}catch(IOException e){
e.printStackTrace();
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));
String line;
while ((line = reader.readLine()) != null) {
result+=line;
}
is.close();
//result=sb.toString();
}catch(Exception e){
e.printStackTrace();
}
// parse json data
try{
JSONArray jArray =new JSONArray(result);
for(int i=0;i<jArray.length();i++){
JSONObject jsonObject=jArray.getJSONObject(i);
// add interviewee name to arraylist
list.add(jsonObject.getString("nama_dosen"));
list2.add(jsonObject.getString("mat_kul"));
}
}
catch(JSONException e){
e.printStackTrace();
}
return null;
}
protected void onPostExecute(Void result){
listItems.addAll(list);
listItems2.addAll(list2);
adapter.notifyDataSetChanged();
adapter2.notifyDataSetChanged();
}
}
}
最满意答案
sp.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
// your code here
if(list.get(position).equals("ardie halim")){
listItems2.clear();
listItems2.add("mobile developer");
adapter2.notifyDataSetChanged();
}
else if(list.get(position).equals("indah")){
listItems2.clear();
listItems2.add("database oracle");
adapter2.notifyDataSetChanged();
}
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
sp.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
// your code here
if(list.get(position).equals("ardie halim")){
listItems2.clear();
listItems2.add("mobile developer");
adapter2.notifyDataSetChanged();
}
else if(list.get(position).equals("indah")){
listItems2.clear();
listItems2.add("database oracle");
adapter2.notifyDataSetChanged();
}
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
更多推荐
发布评论