Android 在另一个活动中删除后更新ListView

我试图在另一个活动中从列表中删除一个对象，该活动通过单击ListView中的某个对象触发，但即使删除成功，我似乎也无法更新ListView

具有ListView的活动：

public class YourList extends AppCompatActivity {
String name;
String token;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_your_list);
    Bundle intent = getIntent().getExtras();
    token = intent.getString("tokenID");
    name = intent.getString("nameIDagain");
    TextView welcome = (TextView) findViewById(R.id.welcomeListText);
    welcome.setText("Welcome to your list, " + name);
    System.out.println(token);
}

@Override
protected void onStart() {
    super.onStart();
    ReadTask task = new ReadTask();
    task.execute("http://api.evang.dk/v2/catches?token=" + token);

}

private class ReadTask extends ReadHttpTask {

    @Override
    protected void onPostExecute(CharSequence charSequence) {
        List<Catch> catches;
        ArrayAdapter<Catch> arrayAdapter;
        catches = new ArrayList<>();
        try {
            JSONArray array = new JSONArray(charSequence.toString());
            System.out.println(array.length());
            for (int i = 0; i < array.length(); i++) {
                JSONObject obj = array.getJSONObject(i);
                Integer id = obj.getInt("id");
                String angler_name = obj.getString("name");
                String email = obj.getString("email");
                String dateTime = obj.getString("datetime");
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                Date jsonDate = sdf.parse(dateTime);
                String fishingMethod = obj.getString("fishing_method");
                String fishBreed = obj.getString("breed");
                String length = obj.getString("length");
                String weight = obj.getString("weight");
                String weather = obj.getString("weather");
                String location = obj.getString("location");
                Double latitude = obj.getDouble("latitude");
                Double longitude = obj.getDouble("longitude");
                Catch fishCatch = new Catch(id, angler_name, jsonDate, fishingMethod, fishBreed, length, weight, weather, location, latitude, longitude);
                catches.add(fishCatch);

            }
            ListView listView = (ListView) findViewById(R.id.yourFishList);
            arrayAdapter = new ArrayAdapter(YourList.this, android.R.layout.simple_list_item_1, catches);
            listView.setAdapter(arrayAdapter);

            listView.setOnItemClickListener((parent, view, position, id) -> {
                Intent intent = new Intent(getBaseContext(), YourDetailsCatch.class);
                intent.putExtra("YourCatch", catches.get((int) id));
                intent.putExtra("token", token);
                startActivity(intent);
            });
            //newAdapter = new Adapter();
            //listView.setAdapter(newAdapter);
            arrayAdapter.notifyDataSetChanged();
        } catch (JSONException ex) {
            ex.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
   }
}

public类YourList扩展了appcompative活动{
字符串名；
字符串标记；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u您的列表）；
Bundle intent=getIntent（）.getExtras（）；
token=intent.getString（“tokenID”）；
name=intent.getString（“nameIDagain”）；
TextView欢迎=（TextView）findViewById（R.id.welcomeListText）；
welcome.setText（“欢迎加入您的列表，”+姓名）；
System.out.println（令牌）；
}
@凌驾
受保护的void onStart（）{
super.onStart（）；
ReadTask任务=新建ReadTask（）；
任务。执行（“http://api.evang.dk/v2/catches?token=“+代币）；
}
私有类ReadTask扩展了ReadHttpTask{
@凌驾
受保护的void onPostExecute（CharSequence CharSequence）{
列出渔获物清单；
ArrayAdapter ArrayAdapter；
catch=newarraylist（）；
试一试{
JSONArray数组=新的JSONArray（charSequence.toString（））；
System.out.println（array.length（））；
对于（int i=0；i{
Intent Intent=新的Intent（getBaseContext（），YourDetailsCatch.class）；
intent.putExtra（“YourCatch”，catch.get（（int）id））；
意向。putExtra（“令牌”，令牌）；
星触觉（意向）；
});
//newAdapter=新适配器（）；
//setAdapter（newAdapter）；
arrayAdapter.notifyDataSetChanged（）；
}捕获（JSONException ex）{
例如printStackTrace（）；
}捕获（解析异常）{
e、 printStackTrace（）；
}
}
}
}

删除活动：

public class YourDetailsCatch extends AppCompatActivity {

private Catch fishCatch;
private String token;
int id;
Intent intent;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_your_details_catch);
    intent = getIntent();
    fishCatch = (Catch) intent.getSerializableExtra("YourCatch");
    token = intent.getStringExtra("token");

    id = fishCatch.getID();
    System.out.println(id);
    TextView anglerName = (TextView) findViewById(R.id.yournameOfAngler);
    anglerName.setText(fishCatch.getAngler_name());

    EditText breed = (EditText) findViewById(R.id.yourfishBreedDetail);
    breed.setText(" " +fishCatch.getBreed());

    EditText method = (EditText) findViewById(R.id.yourfishMethodDetail);
    method.setText(fishCatch.getSpearfishing());

    EditText weight = (EditText) findViewById(R.id.yourfishWeightDetail);
    weight.setText(" " +fishCatch.getWeight());

    EditText length = (EditText) findViewById(R.id.yourfishLengthDetail);
    length.setText(" " +fishCatch.getLength());

    EditText location = (EditText) findViewById(R.id.yourfishLocationDetail);
    location.setText(" " + fishCatch.getLocation());

    EditText latitude = (EditText) findViewById(R.id.yourfishLatitudeDetail);
    String parseLatitude = Double.toString(fishCatch.getLatitude());
    latitude.setText(" " +parseLatitude);

    EditText longitude = (EditText) findViewById(R.id.yourfishLongitudeDetail);
    String parseLongitude = Double.toString(fishCatch.getLongitude());
    longitude.setText(" " +parseLongitude);

    EditText weather = (EditText) findViewById(R.id.yourfishWeatherDetail);
    weather.setText(" " + fishCatch.getWeather());

    EditText dataTime = (EditText) findViewById(R.id.yourfishDateTimeDetail);
    String str = String.format(String.valueOf(fishCatch.getDateTime()));
    dataTime.setText(" " +str);
}

public void deleteCatch(View view) {

DeleteCatchTask deleteCatchTask = new DeleteCatchTask();
 deleteCatchTask.execute("http://api.evang.dk/v2/catches/" + id +  "?token=" + token);

    AlertDialog.Builder alert = new AlertDialog.Builder(YourDetailsCatch.this);
    alert.setTitle("Success");
    alert.setMessage("Deletion Successful");
    alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            finish();
        }
    });
    alert.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();
        }
    });
alert.show();

}
private class DeleteCatchTask extends AsyncTask<String, Void, CharSequence> {

    @TargetApi(Build.VERSION_CODES.CUPCAKE)
    @Override
    protected CharSequence doInBackground(String... params) {
        String urlString = params[0];
        try {
            URL url = new URL(urlString);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("DELETE");
            connection.setRequestProperty("Content-Type", "application/json");
            connection.setRequestProperty("Accept", "application/json");

            int responseCode = connection.getResponseCode();
            if(responseCode / 100 != 2){
                String responseMessage = connection.getResponseMessage();
                throw  new IOException("HTTP response code: " + responseCode + " " + responseMessage);
            }

        } catch (MalformedURLException e) {
            cancel(true);
            String message = e.getMessage() + " " + urlString;
            Log.e("Catches", message);
            return message;
        } catch (IOException ex) {
            cancel(true);
            Log.e("Catches", ex.getMessage());
            return ex.getMessage();
        }
        return null;
    }
}
}

public类YourDetailsCach扩展了AppCompative活动{
私人捕鱼；
私有字符串令牌；
int-id；
意图；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u您的详细信息\u捕获）；
intent=getIntent（）；
fishCatch=（Catch）intent.getSerializableExtra（“YourCatch”）；
token=intent.getStringExtra（“token”）；
id=fishCatch.getID（）；
系统输出打印项次（id）；
TextView anglerName=（TextView）findViewById（R.id.yournameOfAngler）；
anglerName.setText（fishCatch.getAngler_name（））；
EditText品种=（EditText）findViewById（R.id.yourfishBreedDetail）；
bread.setText（“+fishCatch.getbread（））；
EditText方法=（EditText）findViewById（R.id.yourfishMethodDetail）；
方法.setText（fishCatch.getSpearfishing（））；
EditText权重=（EditText）findViewById（R.id.yourfishWeightDetail）；
weight.setText（“+fishCatch.getWeight（））；
EditText长度=（EditText）findViewById（R.id.yourfishLengthDetail）；
length.setText（“+fishCatch.getLength（））；
EditText位置=（EditText）findViewById（R.id.yourfishLocationDetail）；
location.setText（“+fishCatch.getLocation（））；
EditText纬度=（EditText）findViewById（R.id.yourfishLatitudeDetail）；
字符串parseLatitude=Double.toString（fishCatch.getLatitude（））；
纬度.setText（“+parseLatitude）；
EditText经度=（EditText）findViewById（R.id.yourfishLongitudeDetail）；
字符串parseLongitude=Double.toString（fishCatch.getLongitude（））；
经度.setText（“+parseLongitude）；
EditText天气=（EditText）findViewById（R.id.yourfishWeatherDetail）；
weather.setText（“+fishCatch.getWeather（））；
EditText dataTime=（EditText）findViewById（R.id.yourfishDateTimeDetail）；
String str=String.format（String.valueOf（fishCatch.getDateTime（））；
dataTime.setText（“+str”）；
}
公共void deleteCatch（视图）{
DeleteCatchTask DeleteCatchTask=新的DeleteCatchTask（）；
deleteCatchTask.execute（“http://api.evang.dk/v2/catches/“+id+”？令牌=“+token”）；
AlertDialog.Builder alert=新建AlertDialog.Builder（YourDetailsCatch.this）；
警报。设置标题（“成功”）；
alert.setMessage（“删除成功”）；
alert.setPositiveButton（“确定”，新的DialogInterface.OnClickListener（）{
@凌驾
public void onClick（DialogInterface dialog，int which）{
完成（）；
}
});
alert.setNeutralButton（“取消”，新建DialogInterface.OnClickListener（）{
@凌驾
公共void onClick（对话框接口）
// Can be any value of your choosing
private static final int REQUEST_CODE = 112;

Intent intent = new Intent(getBaseContext(), YourDetailsCatch.class);
intent.putExtra("YourCatch", catches.get((int) id));
intent.putExtra("token", token);
startActivityForResult(intent, REQUEST_CODE);

Intent intent = new Intent("deletedId", id);
setResult(RESULT_OK, intent);
finish();

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == REQUEST_CODE = resultCode == RESULT_OK && data != null){
        int id = data.getIntExtra("deletedId", 0);
       // Add logic to remove item from your list

        // Notify adapter of new changes
        adapter.notifiyDataSetChanged();
    }
}