スピナー値の選択中にエラーが発生しました

Question

アンドロイドからスピンウィジェットを使用しました。このシナリオでは、まずデータベースからスピナーにデータをロードします。これは完全に機能します。私は、データベースからロードされたスピナーに国リストを持っています。私の問題は、ユーザーがその時に国選択のためのスピナーをクリックすると、ユーザーはエラーになります。私はエラーログを添付してください。助けて。前もって感謝します。私の問題は解決されましたが、新しいエラーが発生しました。私のエラーログを参照してください 完全なソースコード

Private class Question2Activity extends AppCompactActivity implements View.OnClickListener, AdapterView.OnItemSelectedListener 
{ 
private static final String PATH_TO_SERVER = "http://192.168.1.103/lab/android_login_example/selectcountries.php"; 
private static final String SELECT_CITI = "http://192.168.1.103/lab/android_login_example/selectciti.php"; 

    AppCompatSpinner spCity, upcountry; 

    @Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_question2); 

    mContext = getApplicationContext(); 
    // Get the activity 
    mActivity = Question2Activity.this; 

    // activity_question_detail = (RelativeLayout) findViewById(R.id.activity_question_detail); 

    LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE); 

    // Inflate the custom layout/view 
    View customView = inflater.inflate(R.layout.raw_question2, null); 

    mPopupWindow = new android.widget.PopupWindow(
      customView, 
      ViewGroup.LayoutParams.WRAP_CONTENT, 
      ViewGroup.LayoutParams.WRAP_CONTENT 
    ); 

    mPopupWindow.setAnimationStyle(R.style.PopupAnimation); 

    if (Build.VERSION.SDK_INT >= 21) { 
     mPopupWindow.setElevation(5.0f); 
    } 

    mPopupWindow.setFocusable(true); 
    mPopupWindow.update(); 

    spCountry = (AppCompatSpinner) customView.findViewById(R.id.spCountry); 
    spCity = (AppCompatSpinner) customView.findViewById(R.id.spCity); 
     btnNext = (Button) customView.findViewById(R.id.btnNext); 

    progressDialog = new ProgressDialog(this); 
    progressDialog.setCancelable(false); 


    btnNext.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      Question2User(stCountry, stCity); 
      finish(); 
     } 

    }); 


    requestJsonObject(); 
    requestJsonObjectforCiti(); 

    spCountry.setOnItemSelectedListener(this); 
    spCity.setOnItemSelectedListener(this); 

    findViewById(R.id.activity_question_detail).post(new Runnable() { 
     public void run() { 
      mPopupWindow.showAtLocation(findViewById(R.id.activity_question_detail), Gravity.CENTER, 0, 0); 
     } 
    }); 
} 
@Override 
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { 
    if (adapterView.getId() == R.id.spCountry) { 

     stCountry = spCountry.getSelectedItem().toString(); 
     Log.d("spinner", spCountry.getSelectedItem().toString()); 
    } else if (adapterView.getId() == R.id.spCity) { 

     stCity = spCity.getSelectedItem().toString(); 
     Log.d("spinner", spCity.getSelectedItem().toString()); 
    } 
} 

@Override 
public void onNothingSelected(AdapterView<?> adapterView) { 

} 
} 

private void requestJsonObject() { 
    RequestQueue queue = Volley.newRequestQueue(this); 
    StringRequest stringRequest = new StringRequest(Request.Method.GET, PATH_TO_SERVER, new Response.Listener<String>() { 
     @Override 
     public void onResponse(String response) { 
      GsonBuilder builder = new GsonBuilder(); 
      Gson mGson = builder.create(); 
      spinnerData = Arrays.asList(mGson.fromJson(response, DataObject[].class)); 
      //display first question to the user 
      if (null != spinnerData) { 
       assert spCountry != null; 
       adapter.SpinnerAdapter spinnerAdapter = new adapter.SpinnerAdapter(Question2Activity.this, spinnerData); 
       spCountry.setAdapter(spinnerAdapter); 
      } 
     } 
    }, new Response.ErrorListener() { 
     @Override 
     public void onErrorResponse(VolleyError error) { 
     } 
    }); 
    queue.add(stringRequest); 
} 

private void requestJsonObjectforCiti() { 
    RequestQueue queue = Volley.newRequestQueue(this); 
    StringRequest stringRequest = new StringRequest(Request.Method.GET, SELECT_CITI, new Response.Listener<String>() { 
     @Override 
     public void onResponse(String response) { 
      GsonBuilder builder = new GsonBuilder(); 
      Gson mGson = builder.create(); 
      spinnerData = Arrays.asList(mGson.fromJson(response, DataObject[].class)); 
      //display first question to the user 
      if (null != spinnerData) { 
       assert spCity != null; 
       adapter.SpinnerAdapter spinnerAdapter = new adapter.SpinnerAdapter(Question2Activity.this, spinnerData); 
       spCity.setAdapter(spinnerAdapter); 
      } 
     } 
    }, new Response.ErrorListener() { 
     @Override 
     public void onErrorResponse(VolleyError error) { 
     } 
    }); 
    queue.add(stringRequest); 
} 

あなたはXMLファイルをint型 foはAdapterView.OnItemSelectedListenerとオーバーライドメソッドでコードが役に立つかもしれ以下の通りである。この方法を、あなたのクラスを実装する必要が

Answer 1

例で

@Override 
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { 
     if(adapterView.getId()==R.id.ueducation) { 
      uqlification = qulification.getSelectedItem().toString(); 
      Log.d("spinner", qulification.getSelectedItem().toString()); 
     } 
     else 
     if(adapterView.getId()==R.id.uocuuaption) { 
     uoccupation=occupation.getSelectedItem().toString(); 
      Log.d("spinner", occupation.getSelectedItem().toString()); 
     } 

    } 

    @Override 
    public void onNothingSelected(AdapterView<?> adapterView) { 

    } 



    <android.support.v7.widget.AppCompatSpinner 
      android:id="@+id/ueducation" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="@dimen/_5sdp" 
      android:entries="@array/education" 
      android:padding="@dimen/_10sdp"></android.support.v7.widget.AppCompatSpinner> 

     <android.support.v7.widget.AppCompatSpinner 
      android:id="@+id/uocuuaption" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="@dimen/_5sdp" 
      android:entries="@array/ustatus" 
      android:padding="@dimen/_10sdp"></android.support.v7.widget.AppCompatSpinner> 

ルック：

public class User_Detail extends AppCompatActivity implements View.OnClickListener,AdapterView.OnItemSelectedListener { 

    AppCompatSpinner qulification, occupation; 
    String uqlification="Select",uoccupation="Select"; 



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

     //fetch the spinners view 
     qulification = (AppCompatSpinner) findViewById(R.id.ueducation); 
     occupation = (AppCompatSpinner) findViewById(R.id.uocuuaption); 


     //attac the setItemSelected linstener 
     qulification.setOnItemSelectedListener(this); 
     occupation.setOnItemSelectedListener(this); 

    } 



    } 




    @Override 
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { 
     if(adapterView.getId()==R.id.ueducation) { 
      uqlification = qulification.getSelectedItem().toString(); 
      Log.d("spinner", qulification.getSelectedItem().toString()); 
     } 
     else 
     if(adapterView.getId()==R.id.uocuuaption) { 
     uoccupation=occupation.getSelectedItem().toString(); 
      Log.d("spinner", occupation.getSelectedItem().toString()); 
     } 

    } 

    @Override 
    public void onNothingSelected(AdapterView<?> adapterView) { 

    } 
}