无法在以不同方法定义的内部类中引用非最终变量 myVariable

Question

也许我无法准确解释我的问题，但我希望下面的代码可以帮助您回答我的问题。我正在尝试使用 Intent 在两个活动之间传递字符串数据，同时，在我的 StringRequest 中，我使用 jSonObject 使用 volley 从服务器恢复数据，所以我想知道如何将相同的变量从服务器恢复到使用 putExtra 的第二个活动，因为我有修饰符的问题，如果我的变量的删除修饰符我在 putExtra 中有错误，它应该是 final 修饰符，如果我把它放在我的 jsonobject 有错误，那么，请问有什么解决方案?提前致谢。

String idMed;               
final String numTelMed;
final String communeMed;
final String nomMed;
final String emailMed;
final String codePostalMed;
final String prenomMed;
final String rueMed;
final String villeMed;
final String specialiteMed;
final String latitude;
final String longitude;
ListView listeView;

listeView = (ListView) findViewById(R.id.sampleListView);
List<String> listeMed = new ArrayList<String>();
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(Main_Activity.this,android.R.layout.simple_list_item_1, listeMed);
listeView.setAdapter(adapter1);


JSONArray jObjectSearch = new JSONArray(response);
Log.i("OK","JSONObjectOK : "+jObjectSearch);
Log.i("OK","JSONObjectOK : "+jObjectSearch.getString(0));
for(int i=0; i<jObjectSearch.length();i++)
{
    JSONObject  j = new JSONObject(jObjectSearch.getString(0));
    idMed = j.getString("id");
    nomMed = j.getString("nomMed");
    prenomMed = j.getString("prenomMed");
    numTelMed = j.getString("numTelMed");
    emailMed = j.getString("emailMed");
    rueMed = j.getString("rueMed");
    communeMed = j.getString("communeMed");
    codePostalMed = j.getString("codePostalMed");
    villeMed = j.getString("villeMed");
    specialiteMed = j.getString("specialiteMed");
    latitude = j.getString("latitude");
    longitude = j.getString("longitude");

    listeMed.add("Nom : "+nomMed+"\n "+"Prénom : "+prenomMed+"\n "+"Numéro Téléphone : "+numTelMed+"\n "
              +"Email : "+emailMed+"\n "+"Adresse : "+rueMed+" "+codePostalMed+" "
              +villeMed+" "+communeMed+"\n "+"Spécialité : "+specialiteMed);

     listeView.setOnItemClickListener(new OnItemClickListener() {


        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            medecinSearched = new Intent(Main_Activity.this, MedecinSearched.class);
            medecinSearched.putExtra("nomMed", nomMed);
            medecinSearched.putExtra("prenomMed", prenomMed);
            medecinSearched.putExtra("numTelMed", numTelMed);
            medecinSearched.putExtra("emailMed", emailMed);
            medecinSearched.putExtra("rueMed", rueMed);
            medecinSearched.putExtra("communeMed", communeMed);
            medecinSearched.putExtra("codePostalMed", codePostalMed);
            medecinSearched.putExtra("villeMed", villeMed);
            medecinSearched.putExtra("specialiteMed", specialiteMed);
            medecinSearched.putExtra("latitude", latitude);
            medecinSearched.putExtra("longitude", longitude);

            startActivity(medecinSearched);
            finish();


        }

    });

}

Answer 1

如果你想在匿名类中使用变量，你必须使用 final 关键字。

但是，在这种情况下，我会用另一种方法解决这个问题：

• 创建一个 Med 类，其中包含您需要的所有属性 id、nom、prenom 等。

• 创建一个 MedAdapter 扩展 BaseAdapter 而不是使用 ArrayAdapter<String>。

onCreate 方法：

listeView = (ListView) findViewById(R.id.sampleListView);
listeMed = new ArrayList<Med>();
MedAdapter adapter1 = new MedAdapter<String>(Main_Activity.this, listeMed);
listeView.setAdapter(adapter1);
listeView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Med med = listeMed.get(position);
            Intent medecinSearched = new Intent(Main_Activity.this, MedecinSearched.class);
            medecinSearched.putExtra("EXTRA_MED", med); // Med must implement Serializable or Parcelable
            startActivity(medecinSearched);
            finish();
        }
});

响应回调：

JSONArray jObjectSearch = new JSONArray(response);
for(int i=0; i<jObjectSearch.length(); i++) {
    JSONObject jsonObject = new JSONObject(jObjectSearch.getString(0));
    Med med = new Med(jsonObject); // Med must have a constructor which receives the JSONObject.
    listeMed.add(med);
}
adapter1.notifyDataSetChanged();

希望对你有帮助。

Answer 2

谢谢大家，对我帮助很大

我有解决方案，但我不知道它是否有不便，这是我的解决方案：
`

                            String idMed;             String numTelMed;  String communeMed;
                             String nomMed;          String emailMed;   String codePostalMed;
                             String prenomMed;       String rueMed;     String villeMed;
                             String specialiteMed;   String latitude;   String longitude;
                            ListView listeView;

                            listeView = (ListView) findViewById(R.id.sampleListView);
                            List<String> listeMed = new ArrayList<String>();
                            ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(Main_Activity.this,android.R.layout.simple_list_item_1, listeMed);
                            listeView.setAdapter(adapter1);


                            JSONArray jObjectSearch = new JSONArray(response);
                            Log.i("OK","JSONObjectOK : "+jObjectSearch);
                            Log.i("OK","JSONObjectOK : "+jObjectSearch.getString(0));
                            for(int i=0; i<jObjectSearch.length();i++)
                            {
                             JSONObject  j = new JSONObject(jObjectSearch.getString(0));
                            final String idMedF = idMed = j.getString("id");
                            final String nomMedF = nomMed = j.getString("nomMed");
                            final String prenomMedF =prenomMed = j.getString("prenomMed");
                            final String numTelMedF =numTelMed = j.getString("numTelMed");
                            final String emailMedF =emailMed = j.getString("emailMed");
                            final String rueMedF= rueMed = j.getString("rueMed");
                            final String communeMedF =communeMed = j.getString("communeMed");
                            final String codePostalMedF = codePostalMed = j.getString("codePostalMed");
                            final String villeMedF =villeMed = j.getString("villeMed");
                            final String specialiteMedF =specialiteMed = j.getString("specialiteMed");
                            final double latitudeF =  j.getDouble("latitude");
                            final double longitudeF =  j.getDouble("longitude");

                              listeMed.add("Nom : "+nomMed+"\n "+"Prénom : "+prenomMed+"\n "+"Numéro Téléphone : "+numTelMed+"\n "
                                          +"Email : "+emailMed+"\n "+"Adresse : "+rueMed+" "+codePostalMed+" "
                                          +villeMed+" "+communeMed+"\n "+"Spécialité : "+specialiteMed);

                                 listeView.setOnItemClickListener(new OnItemClickListener() {


                                        @Override
                                        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                                               putData(idMedF, nomMedF, prenomMedF, numTelMedF, emailMedF, rueMedF, communeMedF, codePostalMedF, villeMedF, specialiteMedF, latitudeF, longitudeF);


                                                }

                                      });


                            }

                        } catch (JSONException e) {

                            e.printStackTrace();
                        }



                }`