조건을 사용하여 단일 텍스트 뷰에서 결과를 표시하는 방법

Question

죄송합니다. 답변을 찾지 못한 채 사이트를 검색 할 수있는 좋은 시간을 가졌습니다. 내 질문은 비어 있지 않은 결과 만 표시하는 조건을 만드는 방법입니다. 단일 텍스트보기에 : id = t.

data.json 파일 :

{ 
    "interactions": 
    [ 
     { 
      "MDT1": "ACIDE ACETOHYDROXAMIQUE", 
      "MDT2": "FER", 
      "CI": "", 
      "AD": "", 
      "PE": "", 
      "PC": "A prendre en compte Diminution de l'absorption digestive de ces deux medicaments par chelation du fer..." 
     }, 
     { 
      "MDT1": "ACETAZOLAMIDE", 
      "MDT2": "ACIDE ACETYLSALICYLIQUE", 
      "CI": "", 
      "AD": "Association DECONSEILLEE Majoration des effets indesirables.....", 
      "PE": "", 
      "PC": "" 
     }, 
     { 
      "MDT1": "ACETAZOLAMIDE", 
      "MDT2": "CARBAMAZEPINE", 
      "CI": "", 
      "AD": "", 
      "PE": "Precaution d'emploi Surveillance clinique........", 
      "PC": "" 
     }, 
     { 
      "MDT1": "CARBAMAZEPINE", 
      "MDT2": "OLANZAPINE", 
      "CI": "", 
      "AD": "", 
      "PE": "Precaution d'emploi Surveillance clinique, et si besoin, adaptation posologique de l'olanzapine. Risque de diminution des concentrations plasmatiques de l'olanzapine et de son efficacite therapeutique, par augmentation de son metabolisme hepatique par la carbamazepine.", 
      "PC": "" 
     } 
    ] 
} 

MainActivity.java

public SearchableSpinner mySpinner; 
private SearchableSpinner mySpinner1; 
public ArrayList<Interactions> world = new ArrayList<>(); 
public final ArrayList<String> mStrings = new ArrayList<>(); 
public final ArrayList<String> m2Strings = new ArrayList<>(); 
..... 

public class DownloadJSON extends AsyncTask<Void, Void, Void> { 
     @Override 
     protected Void doInBackground(Void... params) { 
      // Locate the Interactions Class 
      jsonobject = JSONfunctions.getJSONfromURL("https://rabah.000webhostapp.com/data.txt"); 
      try { 
       // Locate the NodeList name 
       jsonarray = jsonobject.getJSONArray("interactions"); 
       for (int j = 0; j < jsonarray.length(); j++) { 
        jsonobject = jsonarray.getJSONObject(j); 
        Interactions worldpop = new Interactions(); 
        worldpop.setMDT1(jsonobject.optString("MDT1")); 
        worldpop.setMDT2(jsonobject.optString("MDT2")); 
        worldpop.setPE(jsonobject.optString("PE")); 
        worldpop.setCI(jsonobject.optString("CI")); 
        worldpop.setAD(jsonobject.optString("AD")); 
        worldpop.setPC(jsonobject.optString("PC")); 
        world.add(worldpop); 
        // Populate spinner with mdts names 
        mStrings.add(jsonobject.optString("MDT1")); 
        m2Strings.add(jsonobject.optString("MDT2")); 
       } 
      } catch (Exception e) { 
       Log.e("Error", e.getMessage()); 
       e.printStackTrace(); 
      } 
      return null; 
     } 
     @Override 
     protected void onPostExecute(Void args) { 
      // Spinner adapter 
      mySpinner.setAdapter(new SimpleListAdapter(MainActivity.this, 
        android.R.layout.simple_spinner_dropdown_item, mStrings)); 

      mySpinner1.setAdapter(new SimpleListAdapter(MainActivity.this, 
        android.R.layout.simple_spinner_dropdown_item,m2Strings)); 
     }} 

private OnItemSelectedListener mOnItemSelectedListener = new OnItemSelectedListener() { 

     @Override 
      public void onItemSelected(View view, int position, long id) { 
       TextView txtMDT1 = (TextView) findViewById(R.id.MDT1); 
       txtMDT1.setText("MDT1 : " + world.get(position).getMDT1()); 

       TextView txtMDT2 = (TextView) findViewById(R.id.MDT2); 
       txtMDT2.setText("MDT2 : " + world.get(position).getMDT2()); 


       String PE = world.get(position).getPE(); 
       String PC = world.get(position).getPC(); 
       String CI = world.get(position).getCI(); 
       String AD = world.get(position).getAD(); 

       if (PE!="") 
       { 
        TextView txtPE = (TextView) findViewById(R.id.t); 
        txtPE.setText("PE : " + world.get(position).getPE()); 
       }else if (PC!="") { 
        TextView txtPc = (TextView) findViewById(R.id.t); 
        txtPc.setText("Pc : " + world.get(position).getPC()); 
       } 
      } 

      @Override 
      public void onNothingSelected() { 
       Toast.makeText(MainActivity.this, "Nothing Selected", Toast.LENGTH_SHORT).show(); 
      } 
     }; 

content_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/content_main" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" 
    tools:context="gr.escsoft.michaelprimez.searchablespinnerexamples.MainActivity" 
    tools:showIn="@layout/activity_main"> 


    <gr.escsoft.michaelprimez.searchablespinner.SearchableSpinner 
     android:id="@+id/mySpinner" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="24dp" 
     android:layout_marginLeft="24dp" 
     android:layout_marginRight="24dp" 
     android:layout_marginStart="24dp" 
     android:layout_marginEnd="24dp" 
     app:RevealEmptyText="Touch to select" 
     android:gravity="center_horizontal" 
     app:ShowBorders="true" 
     app:BordersSize="1dp" 
     app:BoarderColor="@color/colorPrimary" 
     app:SpinnerExpandHeight="250dp"/> 

    <gr.escsoft.michaelprimez.searchablespinner.SearchableSpinner 
     android:layout_height="wrap_content" 
     android:layout_width="wrap_content" 
     android:id="@+id/mySpinner1" 
     app:SpinnerExpandHeight="0dp" 
     app:BoarderColor="@android:color/holo_blue_light" 
     app:BordersSize="1dp" app:ShowBorders="true" 
     android:gravity="center_horizontal" 
     android:layout_marginEnd="24dp" 
     android:layout_marginStart="24dp" 
     android:layout_marginRight="24dp" 
     android:layout_marginLeft="24dp" 
     android:layout_marginTop="24dp" 
     app:RevealEmptyText="Touch to select" 
     app:SearchViewBackgroundColor="@android:color/holo_blue_light" 
     app:RevealViewBackgroundColor="@android:color/holo_blue_light" 
     app:DoneSearchTintColor="@android:color/white" 
     app:StartSearchTintColor="@android:color/white" 
     android:layout_below="@+id/mySpinner"/> 
    <TextView 
     android:id="@+id/MDT1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@+id/mySpinner1" /> 
    <TextView 
     android:id="@+id/MDT2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@+id/MDT1" /> 
    <TextView 
     android:id="@+id/t" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@+id/MDT2" /> 
</RelativeLayout> 

Answer 1

는 것 당신이 질문을 더 설명 했어야 할 때 도움이되었습니다.
여전히 내가 이해할 수있는 것은 문자열로 작업하고 있다는 것입니다 (귀하의 경우 PE 및 PC은 String 개체 임).
그래서 그 대신 if(PE!="")을 확인, 당신은 사용해야합니다 if(!PE.equals(""))
을 Strings와 함께 작업하는 동안 때문에이 표현 대신
if(PE!=null && !PE.equals(""))를 사용 경우 object == value가 object.equals(value)
로 교체해야합니다 발현 그것은더 좋을 것이다
이렇게하면 PE 문자열이 올바르게 초기화되고 값이 내부에 있는지 확인할 수 있습니다.