如何讓TextView的

Question

我得到的警告對話框微調JSON響應微調值，現在我想用逗號的EditText分隔用戶選擇的項目，但是當我運行的應用程序，我能夠只選擇一個，並在我的EditText它顯示只有一個項目......

public class MainActivity extends Activity { 

JSONParser jsonParser = new JSONParser(); 
JSONArray country_list=null; 
private static String BUSINESS_URL = ""; 

private static final String BUSINESS_ID="id"; 
private static final String BUSINESS_NAME="name"; 
ArrayList<HashMap<String,String>> data; 
private TextView splang; 
private String cname; 
private String business_id; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    splang=(TextView)findViewById(R.id.txtvw); 

    new LoadBusiness().execute(); 
} 

class LoadBusiness extends AsyncTask<String, String, ArrayList<HashMap<String,String>>> { 

     ArrayAdapter<String> adaptercountry ; 
    private ProgressDialog pDialog; 
     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 
      pDialog = new ProgressDialog(MainActivity.this); 
      pDialog.setMessage("Loading..."); 
      pDialog.setIndeterminate(false); 
      // pDialog.setIndeterminateDrawable(getResources().getDrawable(R.drawable.custom_progress)); 
      pDialog.setCancelable(true); 
      pDialog.show(); 

     } 
     protected ArrayList<HashMap<String,String>> doInBackground(String... args) { 
      ServiceHandler sh = new ServiceHandler(); 

      // Making a request to url and getting response 
      data = new ArrayList<HashMap<String, String>>(); 
      String jsonStr = sh.makeServiceCall(BUSINESS_URL, ServiceHandler.GET); 

      Log.d("Response: ", "> " + jsonStr); 

      if (jsonStr != null) { 
       try { 

        country_list = new JSONArray(jsonStr); 

        // looping through All Contacts 
        for (int i = 0; i < country_list.length(); i++) { 
         JSONObject c = country_list.getJSONObject(i); 
         // creating new HashMap 
         HashMap<String, String> map = new HashMap<String, String>(); 
         // adding each child node to HashMap key => value 
         map.put(BUSINESS_ID, c.getString(BUSINESS_ID)); 
         map.put(BUSINESS_NAME,c.getString(BUSINESS_NAME)); 
         data.add(map); 

        } 
       } catch (JSONException e) { 
        e.printStackTrace(); 
       } 
      } else { 
       Log.e("ServiceHandler", "Couldn't get any data from the url"); 
      } 

      return data; 
     } 
     protected void onPostExecute(ArrayList<HashMap<String,String>> result) { 
      super.onPostExecute(result); 
      pDialog.dismiss(); 

      String[] arrConuntry=new String[data.size()]; 
      for(int index=0;index<data.size();index++){ 
         HashMap<String, String> map=data.get(index); 
        arrConuntry[index]=map.get(BUSINESS_NAME); 
      } 
      // pass arrConuntry array to ArrayAdapter<String> constroctor : 
      adaptercountry = new ArrayAdapter<String>(MainActivity.this, 
           android.R.layout.simple_list_item_multiple_choice, 
                     arrConuntry); 
      splang.setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View w) { 
         new AlertDialog.Builder(MainActivity.this) 
         .setTitle("Select") 
         .setAdapter(adaptercountry, new DialogInterface.OnClickListener() { 

         @Override 
         public void onClick(DialogInterface dialog, int which) { 

          splang.setText(adaptercountry.getItem(which).toString()); 

          try { 

           cname=country_list.getJSONObject(which).getString("id"); 
           Log.d("Response: ", "> " + cname); 

           business_id=cname.toString(); 
           System.out.println("Business_id"+business_id); 

          } catch (JSONException e) { 
           // TODO Auto-generated catch block 
           e.printStackTrace(); 
          } 

          dialog.dismiss(); 
         } 
         }).create().show(); 
        } 
      }); 

     } 
} 

Answer 1

定義是從多個項目選擇對話框中給定的回調定製界面。

public interface MultipleItemSelectListener { 
    public void onSelected(String value,String ids); 
} 

自定義多項選擇對話方法。

參數

內容：您的活動內容參考。

冠軍：對話框的標題。

jsonArrayString：您的jsonarray響應字符串。

MultipleItemSelectListener：在項目選擇自定義監聽器。

public void getMultiSelectionDialog(final Context context,final String title, String jsonString, final String value, final MultipleItemSelectListener target) { 

    final ArrayList<String> values = new ArrayList<String>(); 
    final ArrayList<String> ids = new ArrayList<String>(); 
    final String BUSINESS_ID="id"; 
    final String BUSINESS_NAME="name"; 

    try { 
     JSONArray jsonArray = new JSONArray(jsonString); 
     int size = jsonArray.length(); 
     for (int i = 0; i < size; i++) { 
      values.add(((JSONObject) jsonArray.get(i)).getString(BUSINESS_NAME).trim()); 
      ids.add(((JSONObject) jsonArray.get(i)).getString(BUSINESS_ID).trim()); 
     } 

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

    final boolean[] selections = new boolean[values.size()]; 
    final StringBuilder newValue = new StringBuilder(); 
    final StringBuilder newIds = new StringBuilder(); 

    AlertDialog alert = null; 

    if (value.length() > 0) { 
     String[] oldValue = value.split(","); 
     int size = values.size(); 
     for (int i = 0; i < size; i++) { 
      int len = oldValue.length; 
      for (int j = 0; j < len; j++) { 
       if (values.get(i).trim().equalsIgnoreCase(oldValue[j].trim())) { 
        selections[i] = true; 
        break; 
       } 
      } 
     } 
    } 

    AlertDialog.Builder builder = new AlertDialog.Builder(context); 
    builder.setTitle(title); 
    builder.setMultiChoiceItems(values.toArray(new CharSequence[values.size()]), selections, new DialogInterface.OnMultiChoiceClickListener() { 

     @Override 
     public void onClick(DialogInterface dialog, int which, boolean isChecked) { 
      selections[which] = isChecked; 
     } 
    }); 

    builder.setPositiveButton("Done", new DialogInterface.OnClickListener() { 

     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      int size = selections.length; 
      for (int i = 0; i < size; i++) { 
       if (selections[i]) { 
        newValue.append(newValue.length() > 0 ? "," + values.get(i) : values.get(i)); 
        newIds.append(newIds.length() > 0 ? "," + ids.get(i) : ids.get(i)); 
       } 
      } 
      target.onSelected(newValue.toString(),newIds.toString()); 

     } 
    }); 
    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 

     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      dialog.dismiss(); 
      int size = selections.length; 
      for (int i = 0; i < size; i++) { 
       if (selections[i]) { 
        newIds.append(newIds.length() > 0 ? "," + ids.get(i) : ids.get(i)); 
       } 
      } 
      target.onSelected(value,newIds.toString()); 
     } 
    }); 
    alert = builder.create(); 
    alert.show(); 
} 

如何getMultiSelectionDialog：

class LoadBusiness extends AsyncTask<Void,Void,String> { 

    Context context; 

    public LoadBusiness(Context context){ 
     this.context=context; 
    } 

    private ProgressDialog pDialog; 
    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(context); 
     pDialog.setMessage("Loading..."); 
     pDialog.setIndeterminate(false); 
     pDialog.setCancelable(true); 
     pDialog.show(); 
    } 

    @Override 
    protected String doInBackground(Void... params) { 
     ServiceHandler sh = new ServiceHandler(); 
     String jsonStr = sh.makeServiceCall(BUSINESS_URL, ServiceHandler.GET); 
     Log.d("Response: ", "> " + jsonStr); 
     return jsonStr; 
    } 

    protected void onPostExecute(String result) { 
     super.onPostExecute(result); 
     pDialog.dismiss(); 
     setTextViewWithMultipleSelectionDialog(context,result); 
    } 
} 


    public void setTextViewWithMultipleSelectionDialog(final Context context,final String jsonArrayString){ 

    splang.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      getMultiSelectionDialog(context,"Countries",jsonArrayString,splang.getText().toString(),new MultipleItemSelectListener() { 
       @Override 
       public void onSelected(String value) { 
        splang.setText(value); 
       } 
      }); 
     } 
    }); 
} 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    splang=(TextView)findViewById(R.id.txtvw); 

    new LoadBusiness(this).execute(); 
}