Question

我正在尝试执行多个请求，并且我将共享首选项中的数据保存为第二个共享首选项代码：

public void makeMultipleRequests()

{
    for(i=0;i<districtid.length;i++)
    {
        districtId=districtid[i];
    String  url="http://49.50.72.188/epdswebsite/webservice.asmx/GetDFSCDetails?DistrictId="+districtId;
         dfsc = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {

            @Override
            public void onResponse(JSONObject response) {
                // TODO Auto-generated method stub

                dialog.dismiss();
                try {
                    if (dialog.isShowing()){
                        dialog.dismiss();
                    }
                    JSONArray ar = response.getJSONArray("DFSCDetails");
                    JSONObject data= ar.getJSONObject(0);
                    String ema=data.getString("Email");
                    String mob=data.getString("Mobile");
                    String off= data.getString("LandLine");
                    String ser= data.getString("DFSCName");
                    String tit = data.getString("District_Name");
                    String add=data.getString("Address");
                    String disid= data.getString("District_Number");
                    preference = getSharedPreferences("Dfsc"+disid, 0);
                    SharedPreferences.Editor edit = preference.edit();
                    edit.putBoolean("dfscboolean", true);
                    edit.putString("serial", ser);
                    edit.putString("office", off);
                    edit.putString("title", tit);
                    edit.putString("address", add);
                    edit.putString("mobile", mob);
                    edit.putString("email", ema);
                                        edit.apply();
                                        dialog.dismiss();

                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                    dialog.dismiss();
                }}
        }, new Response.ErrorListener() {

            @Override
            public void onErrorResponse(VolleyError arg0) {
                // TODO Auto-generated method stub
                dialog.dismiss();
            }

        });
        String surl="http://49.50.72.188/epdswebsite/webservice.asmx/GetFSODetailByDistrict?DistrictId="+districtId;
         JsonObjectRequest fso= new JsonObjectRequest(Request.Method.GET, surl, null, new Listener<JSONObject>() {

                @Override
                public void onResponse(JSONObject response) {
                    // TODO Auto-generated method stub
                    try {
                        JSONArray ar = response.getJSONArray("FSOModelDetails");
                        JSONObject data= ar.getJSONObject(0);
                        String add= data.getString("Office_Address");
                        String mob= data.getString("Personal_Mobile");
                        String nam = data.getString("Name");
                        String dis = data.getString("District_Name");

                        SharedPreferences  mPrefs = getSharedPreferences("Fso"+districtId, 0);
                        SharedPreferences.Editor edit = mPrefs.edit();
                        edit.putBoolean("fsoboolean", true);
                        edit.putString("address", add);
                        edit.putString("mobile",mob);
                        edit.putString("name", nam);
                        edit.putString("district", dis);

                            edit.apply();
                            System.out.println(mPrefs.getString("address", "failed"));
                            dialog.dismiss();

                        dialog.dismiss();
                    } catch (JSONException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                        dialog.dismiss();
                        Toast.makeText(getApplicationContext(), "Failed! Could not connect to the server!", Toast.LENGTH_SHORT).show();
                    }

                }
            }, new Response.ErrorListener() {

                @Override
                public void onErrorResponse(VolleyError arg0) {
                    // TODO Auto-generated method stub
                    dialog.dismiss();   
                    Toast.makeText(getApplicationContext(), "Failed! Could not connect to the server!", Toast.LENGTH_SHORT).show();
                }

            });
         request.add(dfsc);
         request.add(fso);
    }
    `*

这是我从enter code here共享偏好设置中获取数据的第二个活动：

public void loadstaticdata()
{
    SharedPreferences mPrefs = getSharedPreferences("Fso"+districtId, 0);
    String addres=mPrefs.getString("address", "");
    String nam=mPrefs.getString("name", "");
    String distric=mPrefs.getString("district", "");
    String mobil=mPrefs.getString("mobile", "");
    System.out.println(addres);
    System.out.println(distric);
    System.out.println(mobil);
    System.out.println(nam);
    address.setText(addres);
    name.setText(nam);
    district.setText(distric);
    mobile.setText(mobil);

}

我哪里错了？

Answer 1

首先，如果您要保存大量数据，则应选择SQLite之类的方法。

无论如何，既然你在项目中使用了这个，我想直接回答你的问题。

而不是edit.apply();尝试使用edit.commit();。

commit()方法在主线程上运行并将阻塞。 apply()方法以异步方式运行。

Answer 2

确保SharedPreferences对PreferenceManager.getDefaultSharedPreferences

不敏感

提交任何数据：

    String myValue="My Value";
    SharedPreferences preference = PreferenceManager.getDefaultSharedPreferences(this);
    SharedPreferences.Editor edit = preference.edit();
    edit.putString("KEY", myValue);
    /*  Your Code  */
    edit.commit();

要检索它：

    SharedPreferences mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
    String myValue=mPrefs.getString("KEY", "");
    /* Your code */

共享首选项不起作用

2 个答案: