java - 从方法中获取 String 或 Int 以将其发送到另一个 Activity

Question

每次用户进入应用程序时，我都会从服务器获取一个 ID，我需要将该 ID 发送到另一个 Activity ，因为我根据从服务器获取的 ID 执行操作。但我不知道如何从函数中获取它以将其存储在变量中然后按 Intent 发送。这是我的代码请指导我如何去做:

public class SuperAdminActivity extends AppCompatActivity {
int ID = -1;
private String s;
private ProgressDialog loading;
private SharedPreferences sp;
private Button register_new_company, register_new_user, see_all_userslist, see_all_companies_list, new_item;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_super_admin);
    register_new_company = (Button) findViewById(R.id.btn_register_new_company);
    register_new_user = (Button) findViewById(R.id.btn_register_new_user);
    see_all_userslist = (Button) findViewById(R.id.btn_show_all_users_list);
    see_all_companies_list = (Button) findViewById(R.id.btn_all_organizations_list);
    new_item = (Button) findViewById(R.id.btn_new_item);
    sp = getApplicationContext().getSharedPreferences("userP", 0);
    s = sp.getString("Username", "");
    Log.e("Username ", s);
    getData();
}
public void onRegisterButtonNewCompanyClicked(View v) {
    startActivity(new Intent(this, RegisterNewCompany.class));
}

public void onUserRegisterButtonClicked(View v) {
    startActivity(new Intent(this, UserRegisteration.class));

}



@Override
public void onBackPressed() {
    Intent intent = new Intent(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_HOME);
    startActivity(intent);
}


private void getData() {
    String id = s;
    loading = ProgressDialog.show(this, "Please wait...", "Getting Some data...", false, false);

    String url = config.DATA_URL + s.toString().trim();
    StringRequest stringRequest = new StringRequest(url, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            loading.dismiss();
            showJSON(response);

            Log.e("RESPONE : ", response);
        }
    },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                }
            });

    RequestQueue requestQueue = Volley.newRequestQueue(this);
    requestQueue.add(stringRequest);
}

private void showJSON(String response) {
    String name = "";
    try {
        JSONObject jsonObject = new JSONObject(response);
        JSONArray result = jsonObject.getJSONArray(config.JSON_ARRAY);
        JSONObject collegeData = result.getJSONObject(0);
        name = collegeData.getString("usr_type");
    } catch (JSONException e) {
        e.printStackTrace();
    }
    Log.e("UserType = ", name);
    int i = Integer.parseInt(name);
    ID = Integer.parseInt(name);
    Log.e("My Current ID :" , String.valueOf(ID));
    if (i == 1) {
        register_new_company.setEnabled(true);
        register_new_user.setEnabled(true);
    } else {
        register_new_company.setEnabled(false);
        register_new_user.setEnabled(false);
    }

}

public void onBtnAllUsersListCLick(View v)
{
    Intent intent = new Intent(getApplicationContext(),ActivityAllUsers.class);
    intent.putExtra("ID",ID);
    startActivity(intent);
    //startActivity(new Intent(this, ActivityAllUsers.class));
}
}

如您所见，我可以访问 onCreate 中的 getData(); 函数，此方法Logs 从服务器端获取的数组但我想存储 showJSON 方法中的 int

Answer 1

先做一个全局变量ID，它是整型的，比如

int ID = -1;// -1 is default value

然后在您的 showJSON 方法中赋值

喜欢

ID = //get value from json which is received from server

然后将它传递给这样的任何 Activity

          Intent intent = new Intent(SuperAdminActivity.this, UserRegisteration.class);
          intent.putExtra("ID", ID)
          startActivity(intent);

在 UserRegisteration 中获取 ID，例如

int id = getIntent().getIntExtra("ID", -1);// -1 is default value