How to put Arraylist of Custom Object in a SharedPreference

Question

I want to save Arraylist of Custom type Object in sharedPreference. For that purpose I passed Arraylist to Gson, there is no compile error but after running this code device wait for long time and got stuck. Kindly suggest me other way if I am on wrong way.

public void storeApps(Context context, List<AppInfo> apps) {
    SharedPreferences settings;
    SharedPreferences.Editor editor;
    settings = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
    editor = settings.edit();
    Gson gson = new Gson();
    String jsonData = gson.toJson(apps);// this line wait for long time at compile time.
    editor.putString(Fav, jsonData);
    editor.commit();
}

AppInfo Class

public class AppInfo {
    public String appname = "";
    public String pname = "";
    public String versionName = "";
    public int versionCode = 0;
    public Drawable icon;
    public int color = 0;

    public String getAppname() {
        return appname;
    }

    public String getVersionName() {
        return versionName;
    }

    public String getPname() {
        return pname;
    }

    public Drawable getIcon() {
        return icon;
    }

    public int getVersionCode() {
        return versionCode;
    }

    public int getColor() {
        return color;
    }

    public void setAppname(String appname) {
        this.appname = appname;
    }

    public void setPname(String pname) {
        this.pname = pname;
    }

    public void setVersionName(String versionName) {
        this.versionName = versionName;
    }

    public void setVersionCode(int versionCode) {
        this.versionCode = versionCode;
    }

    public void setIcon(Drawable icon) {
        this.icon = icon;
    }

    public void setColor(int color) {
        this.color = color;
    }

    public AppInfo() { }

    public AppInfo(String appname, String pname, String versionName, int versionCode, Drawable icon, int color) {
        this.appname = appname;
        this.pname = pname;
        this.versionName = versionName;
        this.versionCode = versionCode;
        this.icon = icon;
        this.color = color;
    }
}

Actualy app info is predefined class that is why the Gson is unable to convert it.You need to ceate your own class store the needed data only the field you want. — Rohit Heera
– Rohit Heera, Commented Dec 23, 2015 at 12:08
@Rohit Heera AppInfo is a class that i have created. It is not predefined class — M.ArslanKhan
– M.ArslanKhan, Commented Dec 23, 2015 at 12:23
I can post a code it works fine in my case when i can convert the contact list.. — Rohit Heera
– Rohit Heera, Commented Dec 23, 2015 at 13:14

Rohit Heera · Accepted Answer · 2015-12-23 13:13:51Z

1

class Mydata 

{

ArrayList<AppInfo> data;

    public Mydata (List<AppInfo> data) {

        this.data= data;

    }

    public List<AppInfo> getContactSyn() {
        return data;
    }

    public void setContactSyn(List<AppInfo> data) {
        this.data= data;
    }


}

 Gson gson = new Gson();
MyData datalist = new MyData(data);

    String jsonData = gson.toJson(datalist);

answered Dec 23, 2015 at 13:13

Rohit Heera

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6 Comments

Rohit Heera Over a year ago

Actually you can covert list it is good practise to convert asingle object rather than a list of object

M.ArslanKhan Over a year ago

same problem again here

M.ArslanKhan Over a year ago

@njzk2 I think source is ok.

njzk2 Over a year ago

@Tarikhelian I am asking if Rohit has any source to support that claim [that converting a single object is "good practice"]

M.ArslanKhan Over a year ago

I have applied Rohit source as well but same result.

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