Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to retrieve shared preferences of other application in Android?
This example demonstrates how to do I in android.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="16dp" tools:context=".MainActivity"> <EditText android:id="@+id/etEmail" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:ems="10" android:hint="Email" android:inputType="textEmailAddress" /> <EditText android:id="@+id/etName" android:layout_width="match_parent" android:layout_height="wrap_content" android:ems="10" android:hint="Name" android:inputType="text" /> <Button android:layout_marginTop="50dp" android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="Save" android:text="Save" /> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="Clear" android:text="Clear Data" /> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="Retrieve" android:text="Retrieve Data" /> </LinearLayout>
Step 3 − Add the following code to src/MainActivity.java
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
EditText etName, etEmail;
SharedPreferences sharedPreferences;
public static final String myPreference = "myPref";
public static final String Name = "nameKey";
public static final String Email = "emailKey";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
etName = findViewById(R.id.etName);
etEmail = findViewById(R.id.etEmail);
sharedPreferences = getSharedPreferences(myPreference, Context.MODE_PRIVATE);
if (sharedPreferences.contains(Name)) {
etName.setText(sharedPreferences.getString(Name, ""));
}
if (sharedPreferences.contains(Email)) {
etEmail.setText(sharedPreferences.getString(Email, ""));
}
}
public void Clear(View view) {
etName = findViewById(R.id.etName);
etEmail = findViewById(R.id.etEmail);
etName.setText("");
etEmail.setText("");
Toast.makeText(MainActivity.this, "Cleared", Toast.LENGTH_LONG).show();
}
public void Retrieve(View view) {
etName = findViewById(R.id.etName);
etEmail = findViewById(R.id.etEmail);
sharedPreferences = getSharedPreferences(myPreference, Context.MODE_PRIVATE);
if (sharedPreferences.contains(Name)) {
etName.setText(sharedPreferences.getString(Name, ""));
}
if (sharedPreferences.contains(Email)) {
etEmail.setText(sharedPreferences.getString(Email, ""));
}
Toast.makeText(MainActivity.this, "Retrieved", Toast.LENGTH_LONG).show();
}
public void Save(View view) {
String name = etName.getText().toString();
String email = etEmail.getText().toString();
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(Name, name);
editor.putString(Email, email);
editor.apply();
Toast.makeText(MainActivity.this, "Saved", Toast.LENGTH_LONG).show();
}
}Step 4 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from the android studio, open one of your project's activity files and click Run 
icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −
Click here to download the project code.
Updated on: 22-Nov-2019
662 Views
Advertisements