How to pass sharedpreferences from one activity to another activity?

Question

I have two activities in my project one activity is MainActivity and another is Main2activity, In Main2activity I'm taking input from the user and storing it in SharedPreference, Now I want to pass this data to MainActivity and display that data to the user.

The code for Main2activity is

 package com.example.to_doapp;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.EditText;
import java.io.Serializable;
import java.util.ArrayList;
public class Main2Activity extends AppCompatActivity {




public void BackMain ( View view )
{
    Intent intent = new Intent( getApplicationContext() ,MainActivity.class ) ;
    SharedPreferences sharedPreferences = this.getSharedPreferences( "com.example.to_doapp;", Context.MODE_PRIVATE);
    EditText editText = ( EditText) findViewById( R.id.editText3) ;
    String s = editText.getText().toString();
    sharedPreferences.edit().putString("task" , s ) .apply();

    //intent.putStringArrayListExtra("key",arr);
    startActivity(intent);



}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);
    Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    FloatingActionButton fab = findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });
}

}

code foe Mainactivity is

package com.example.to_doapp;

import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import java.io.Serializable;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {


public void onclick (View view){

    Intent intent = new Intent(getApplicationContext(), Main2Activity.class );
    startActivity(intent);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    FloatingActionButton fab = findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });

    Intent intent = getIntent();


 }

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

}

I want to know how to pass sharedpreferences and how to display that data to user in listview. Thank you for help in advance.

No need to pass SharedPreference from one screen to other because You can access SharedPreference object from anywhere in the app by keys. — Rutvik Bhatt, Mar 22 '19 at 13:22
@RutvikBhatt please elaborate !! As I'm newbie I'm unable to understand. — shalini negi, Mar 22 '19 at 13:26
Possible duplicate of [Android Shared preferences example](https://stackoverflow.com/questions/23024831/android-shared-preferences-example) — Swati, Mar 22 '19 at 13:31

score 0 · Answer 1 · answered Mar 22 '19 at 13:23

0

You can use SharedPreferences getString() method in your second activity. Here is the documentation: https://developer.android.com/reference/android/content/SharedPreferences.html#getString(java.lang.String,%20java.lang.String)

answered Mar 22 '19 at 13:23

just

1,900
4
25
46

score 0 · Answer 2 · answered Mar 22 '19 at 13:24

0

SharedPreferences sharedPreferences = this.getSharedPreferences( "com.example.to_doapp;", Context.MODE_PRIVATE);
sharedPreferences.getString("task", "");

You can use the above code to get the data from shared preference any time until it is cleared. But i would suggest you create a class for the same and carry out all the Preference related task in the same

answered Mar 22 '19 at 13:24

Shahnawaz Ansari

340
2
9

Shahnavaz , You mean to say that I add this code to my MainActivity to get the access of the data stored in sharedpreferences. After this how do I display this data to user !! – shalini negi Mar 22 '19 at 13:31
Yes and depends on how do you want to display it. You can use a Toast.makeText(this,"This is your data" + task,Toast.LENGTH_SHORT).show(); or you could use a TextView to display it [link](https://developer.android.com/reference/android/widget/TextView) – Shahnawaz Ansari Mar 22 '19 at 13:33

score 0 · Answer 3 · answered Mar 22 '19 at 13:26

0

The simplest way is:

Set SharedPref:

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
Editor editor = prefs.edit();
editor.putString(PREF_NAME, "someValue");
editor.commit();

Get SharedPref:

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
String yourValue = prefs.getString(PREF_NAME, "");

answered Mar 22 '19 at 13:26

Kristiyan Varbanov

2,439
2
17
37

what if our sharedpreferences contain more than one data, then what will be the string in yourValue ? Basically, I want to know how prefs.getString(PREF_NAME, "") works – shalini negi Mar 22 '19 at 13:48

score 0 · Answer 4 · answered Mar 22 '19 at 13:27

0

No need to pass SharedPreferences . you get any activity or fragment on SharedPreferences value..

SharedPreferences shared = getSharedPreferences("Your SharedPreferences name", MODE_PRIVATE);
String data= shared.getString("key", "");

Note : key should be same as edit or save data time used. also SharedPreferences name same.

answered Mar 22 '19 at 13:27

Infusion Analysts

471
2
6

How do I display the data stored in it to user please specify !! – shalini negi Mar 22 '19 at 13:43
you can display any view control. – Infusion Analysts Mar 22 '19 at 14:09

Abhinav Gupta · Answer 5 · 2019-03-22T13:35:46.753

I am sharing you easiest way to set and get sharedpreference data :

First make a class for Shared Preference like that :

public class MySharedPreferences {

private static String MY_PREFS = "MyPrefs";
private static String IS_LOGGED_IN = "is_logged_in";
private static String USERNAME_ID = "username"

public static MySharedPreferences instance;
private Context context;
private SharedPreferences sharedPreferences;
private SharedPreferences.Editor editor;


public static MySharedPreferences getInstance(Context context) {
    if (instance == null)
        instance = new MySharedPreferences(context);
    return instance;
}

private MySharedPreferences(Context context) {
    this.context = context;
    sharedPreferences = context.getSharedPreferences(MY_PREFS, Context.MODE_PRIVATE);
    editor = sharedPreferences.edit();
}

public void deleteAllSharePrefs(Context context){
    this.context = context;
    sharedPreferences = context.getSharedPreferences(MY_PREFS,Context.MODE_PRIVATE);
    editor.clear().commit();
}

public Boolean getIsLoggedIn(boolean b) {
    return sharedPreferences.getBoolean(IS_LOGGED_IN, false);
}

public void setIsLoggedIn(Boolean isLoggedIn) {
    editor.putBoolean(IS_LOGGED_IN, isLoggedIn);
    editor.commit();
}


public String getUsername() {
    return sharedPreferences.getString(USERNAME_ID, "");
}

public void setUsername(String username) {
    editor.putString(USERNAME_ID, username);
    editor.commit();
}

then where you want to set SharedPreference :

public void BackMain ( View view ){
EditText editText = ( EditText) findViewById( R.id.editText3) ;
MySharedPreferences.getInstance(Main2Activity.this).setUsername(editText.getText().toString());
Intent intent = new Intent( getApplicationContext() ,MainActivity.class ) 
startActivity(intent);
}

Now, get SharedPreference in your Second Activity:

MySharedPreferences.getInstance(ACTIVITYNAME.this).getUsername();

or in Fragment :

MySharedPreferences.getInstance(getActivity()).getUsername();

or in Adapter :

MySharedPreferences.getInstance(context).getUsername();

where do I add this class sharedpreferences and how do I display it to user? — shalini negi, Mar 22 '19 at 13:43
@shalininegi I think you are new in Android please make this class in your main package — Abhinav Gupta, Mar 22 '19 at 13:46

score 0 · Answer 6 · answered Mar 22 '19 at 13:31

0

When you add a shared preference for the app, it can be accessed from anywhere within the app.

SharedPreferences shared = PreferenceManager.getDefaultSharedPreferences(getContext());
String data= shared.getString("nameOfValue", "");

answered Mar 22 '19 at 13:31

Gourav

2,746
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How to pass sharedpreferences from one activity to another activity?

6 Answers6