多個Spinners進行各種JSON調用

該應用程序的目的是讓spinners離開（主隊）和右側（Away隊）。我可以成功地填充主隊微調，但是當我嘗試填充客隊紡紗我得到的錯誤：多個Spinners進行各種JSON調用

06-25 18:02:36.052: W/System.err(17916): org.json.JSONException: Value at 0 is null. 
06-25 18:02:36.057: W/System.err(17916): at org.json.JSONArray.get(JSONArray.java:259) 
06-25 18:02:36.057: W/System.err(17916): at org.json.JSONArray.getJSONObject(JSONArray.java:480) 
06-25 18:02:36.057: W/System.err(17916): at app.league.npd.CaptainsInfo.useaJson(CaptainsInfo.java:309)

我可以看到錯誤從「ATEAM」陣來，但我不知道是什麼問題是。我是新來的android編程，所以任何幫助，將不勝感激。

下面是代碼：

public class CaptainsInfo extends Activity { 

JSONArray jsonArray = null; 
JSONArray str_login = null; 
public String items[]; 
public String aitems[]; 
private Spinner 
spinner1, spinner2, spinner3, spinner4, 
spinner5, spinner6, spinner7, spinner8, 
spinner9, spinner10, spinner11, spinner12, 
spinner13, spinner14; 
private Button btnSubmit; 
public String kode; 
public String Home_team; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 



    //addItemsOnSpinner2(); 
    addListenerOnButton(); 
    addListenerOnSpinnerItemSelection(); 
    addListenerOnSpinner2ItemSelection(); 

} 


public void addItemsOnSpinner(String items[]) { 

    spinner3 = (Spinner) findViewById(R.id.player11); 
    spinner5 = (Spinner) findViewById(R.id.player12); 
    spinner7 = (Spinner) findViewById(R.id.player21); 
    spinner9 = (Spinner) findViewById(R.id.player22); 
    spinner11 = (Spinner) findViewById(R.id.player31); 
    spinner13 = (Spinner) findViewById(R.id.player32); 




    ArrayAdapter<String> adapter = new ArrayAdapter<String>(
      this,android.R.layout.simple_spinner_item, items); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner3.setAdapter(adapter); 

    adapter = new ArrayAdapter<String>(
       this,android.R.layout.simple_spinner_item, items); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner5.setAdapter(adapter); 

    adapter = new ArrayAdapter<String>(
       this,android.R.layout.simple_spinner_item, items); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner7.setAdapter(adapter); 

    adapter = new ArrayAdapter<String>(
      this,android.R.layout.simple_spinner_item, items); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner9.setAdapter(adapter); 

    adapter = new ArrayAdapter<String>(
      this,android.R.layout.simple_spinner_item, items); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner11.setAdapter(adapter); 

    adapter = new ArrayAdapter<String>(
      this,android.R.layout.simple_spinner_item, items); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner13.setAdapter(adapter); 



    } 

public void addItemsOnSpinner2(String aitems[]) { 

    spinner4 = (Spinner) findViewById(R.id.aplayer11); 
    spinner6 = (Spinner) findViewById(R.id.aplayer12); 
    spinner8 = (Spinner) findViewById(R.id.aplayer21); 
    spinner10 = (Spinner) findViewById(R.id.aplayer22); 
    spinner12 = (Spinner) findViewById(R.id.aplayer31); 
    spinner14 = (Spinner) findViewById(R.id.aplayer32); 

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(
      this,android.R.layout.simple_spinner_item, aitems); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner4.setAdapter(adapter); 
     adapter = new ArrayAdapter<String>(
      this,android.R.layout.simple_spinner_item, aitems); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner6.setAdapter(adapter); 

    adapter = new ArrayAdapter<String>(
       this,android.R.layout.simple_spinner_item, aitems); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner8.setAdapter(adapter); 

    adapter = new ArrayAdapter<String>(
      this,android.R.layout.simple_spinner_item, aitems); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner10.setAdapter(adapter); 

    adapter = new ArrayAdapter<String>(
       this,android.R.layout.simple_spinner_item, aitems); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner12.setAdapter(adapter); 

    adapter = new ArrayAdapter<String>(
      this,android.R.layout.simple_spinner_item, aitems); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinner14.setAdapter(adapter); 


} 
public void addListenerOnSpinnerItemSelection(){ 

    spinner1 = (Spinner) findViewById(R.id.h_type); 
    spinner1.setOnItemSelectedListener(new CustomOnItemSelectedListener()); 
    spinner1.setOnItemSelectedListener(new OnItemSelectedListener() 
    { 
     public void onItemSelected(AdapterView<?> parent, View view, int position, long id) 
     { 
      //String test1 = parent.getItemAtPosition(position).toString(); 
      String test = (String) spinner1.getSelectedItem(); 
      //String test2 = (String) spinner2.getSelectedItem(); 

      items=useJson(test); 
      //aitems=useaJson(test2); 


      //addItemsOnSpinner2(aitems); 
      addItemsOnSpinner(items); 


     } 



     @Override 
     public void onNothingSelected(AdapterView<?> arg0) { 
      // TODO Auto-generated method stub 

     } });} 

    public void addListenerOnSpinner2ItemSelection(){ 

     spinner2 = (Spinner) findViewById(R.id.a_type); 
     spinner2.setOnItemSelectedListener(new CustomOnItemSelectedListener()); 
     spinner2.setOnItemSelectedListener(new OnItemSelectedListener() 
     { 
      public void onItemSelected(AdapterView<?> parent, View view, int position, long id) 
      { 
       //String test2 = parent.getItemAtPosition(position).toString(); 
       //String test = (String) spinner1.getSelectedItem(); 
       String test2 = (String) spinner2.getSelectedItem(); 

       // items=useJson(test); 
       aitems=useaJson(test2); 


       addItemsOnSpinner2(aitems); 
       //addItemsOnSpinner(items); 


      } 



      @Override 
      public void onNothingSelected(AdapterView<?> arg0) { 
       // TODO Auto-generated method stub 

      } }); 
} 







//get the selected dropdown list value 
public void addListenerOnButton() { 

    spinner1 = (Spinner) findViewById(R.id.h_type); 
    spinner2 = (Spinner) findViewById(R.id.a_type); 
    spinner3 = (Spinner) findViewById(R.id.player11); 
    spinner4 = (Spinner) findViewById(R.id.aplayer11); 
    spinner5 = (Spinner) findViewById(R.id.player12); 
    spinner6 = (Spinner) findViewById(R.id.aplayer12); 
    spinner7 = (Spinner) findViewById(R.id.player21); 
    spinner8 = (Spinner) findViewById(R.id.aplayer21); 
    spinner9 = (Spinner) findViewById(R.id.player22); 
    spinner10 = (Spinner) findViewById(R.id.aplayer22); 
    spinner11 = (Spinner) findViewById(R.id.player31); 
    spinner12 = (Spinner) findViewById(R.id.aplayer31); 
    spinner13 = (Spinner) findViewById(R.id.player32); 
    spinner14 = (Spinner) findViewById(R.id.aplayer32); 


    btnSubmit = (Button) findViewById(R.id.btnSubmit); 

    btnSubmit.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View v) { 

      Toast.makeText(CaptainsInfo.this, 
        "OnClickListener : " + 
        "\nSpinner 1 : " + String.valueOf(spinner1.getSelectedItem()) + 
        "\nSpinner 2 : " + String.valueOf(spinner2.getSelectedItem()), 
        Toast.LENGTH_SHORT).show(); 
     } 

    }); 









String links_url = "http://192.168.9.59/NPD/detail-info.php?Match_id="+kode; 

// Call the FunctionParser to parse the information being returned 
// From the FHL databaseList<NameValuePair> params = new ArrayList<NameValuePair>(); 
JSONParser jParser = new JSONParser(); 
JSONObject json = jParser.FunctionParser(links_url); 

// The array is called and the information is returned from 
// the database corresponding to each string below 
try { 
str_login = json.getJSONArray("temp"); 
String jdwl = ""; 
TextView isi = (TextView) findViewById(R.id.fixdet); 
for(int i = 0; i < str_login.length(); i++){ 
    JSONObject ar = str_login.getJSONObject(i); 

    Home_team = ar.getString("Home_team"); 
    jdwl += "" + ar.getString("Home_team")+"\n vs \n"+ 
      "" + ar.getString("Away_team")+"\n"+ 
      "" + ar.getString("Fixture_date")+"\n"; 
} 
isi.setText(jdwl); 

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

public String[] useJson(String test) { 
    JSONParser jParser = new JSONParser(); 
     String link_url = "http://10.2.0.0/NPD/P_name.php?"+test; 
     JSONObject json = jParser.FunctionParser(link_url); 

     try { 
      jsonArray = json.getJSONArray("team"); 
      items = new String[jsonArray.length()]; 
      for (int i = 0; i < jsonArray.length(); i++) { 
      JSONObject jsonObject = jsonArray.getJSONObject(i);   
      items[i]=jsonObject.getString("name"); 
      } 
      return(items);} 
    catch (JSONException e) { 
     e.printStackTrace(); 
    } 
     return items; 



} 

public String[] useaJson(String test2) { 
    JSONParser jjParser = new JSONParser(); 
     String links_url = "http://10.2.0.0/NPD/P_name1.php?"+test2; 
     JSONObject json = jjParser.FunctionParser(links_url); 

     try { 
      jsonArray = json.getJSONArray("ateam"); 
      aitems = new String[jsonArray.length()]; 
      for (int i = 0; i < jsonArray.length(); i++) { 
      JSONObject jsonObject = jsonArray.getJSONObject(i);   
      aitems[i]=jsonObject.getString("name"); 
      } 
      return(aitems);} 
    catch (JSONException e) { 
     e.printStackTrace(); 
    } 
     return aitems; 


} 
}

來源

2013-06-25 RunningWalks

我的答案是如何工作的？ –

根據json.org（http://www.json.org/javadoc/org/json/JSONArray.html#getJSONObject(int)）：

getJSONObject throws JSONException if there is no value for the index or if the value is not a JSONObject.

被填充了ateam陣列如何？似乎你在裏面加入null值。請確保您的ateam陣列與初始化JSONObject只有稀少，也許當你將它添加到ateam陣列，所以你必須檢查是否是null其添加到ateam前JSONObject是null。

來源

2013-06-25 17:23:24

ateam與團隊完全相同，但類型已從'select name from npd_test where fixture_type ='away'更改爲'從npd_test中選擇名稱，其中fixture_type =「home」'。那就是爲什麼我推測它會以相同的方式填充？ – RunningWalks

所以也許問題是這些選擇返回的數據。檢查是否有任何讀取字符串的方式返回數據，並用Log.d（「MyApp」，「data：」+ returnedData）'將它發送給logcat，然後檢查你的logcat是否一切正常。你可以做的另一件事是使用與另一個完全相同的選擇來填充'ateam'，如果一切正常，那麼確定問題是select所返回的數據。 –

多個Spinners進行各種JSON調用

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