In this example i'm going to show you how to work with sharedpreferences in android and how to access sharedpreferences values in another activity in android studio.
Example ::
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:focusableInTouchMode="true"
android:orientation="vertical"
android:padding="10dp"
tools:context=".MainActivity">
<EditText
android:id="@+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Name" />
<EditText
android:id="@+id/email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email" />
<EditText
android:id="@+id/contact"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Contact" />
<EditText
android:id="@+id/city"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="City" />
<Button
android:layout_width="250dp"
android:layout_height="wrap_content"
android:text="Insert"
android:id="@+id/btnInsert"
android:layout_gravity="center"
android:layout_marginTop="30dp"
/>
<Button
android:layout_width="250dp"
android:layout_height="wrap_content"
android:text="View"
android:id="@+id/btnView"
android:layout_gravity="center"
android:layout_marginTop="10dp"
/>
<Button
android:layout_width="250dp"
android:layout_height="wrap_content"
android:text="Open HomeActivity"
android:id="@+id/btnHOmeActivity"
android:layout_gravity="center"
android:layout_marginTop="10dp"
/>
</LinearLayout>
MainActivity.java
package com.example.malik.blog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.IOException;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
EditText name, email, contact, city;
Button insert, view, homeActivity;
public static final String mainKey = "mainKey";
public static final String nameKey = "nameKey";
public static final String emailKey = "emailKey";
public static final String contactKey = "contactKey";
public static final String cityKey = "cityKey";
SharedPreferences sharedPreferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
name = (EditText) findViewById(R.id.name);
email = (EditText) findViewById(R.id.email);
contact = (EditText) findViewById(R.id.contact);
city = (EditText) findViewById(R.id.city);
insert = (Button) findViewById(R.id.btnInsert);
view = (Button) findViewById(R.id.btnView);
homeActivity = (Button) findViewById(R.id.btnHOmeActivity);
insert.setOnClickListener(this);
view.setOnClickListener(this);
homeActivity.setOnClickListener(this);
sharedPreferences = getSharedPreferences(mainKey,MODE_PRIVATE);
if(sharedPreferences.contains(nameKey)){
name.setText(sharedPreferences.getString(nameKey,""));
}
if(sharedPreferences.contains(emailKey)){
email.setText(sharedPreferences.getString(emailKey,""));
}
if(sharedPreferences.contains(contactKey)){
contact.setText(sharedPreferences.getString(contactKey,""));
}
if(sharedPreferences.contains(cityKey)){
city.setText(sharedPreferences.getString(cityKey,""));
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnInsert:
String NAME = name.getText().toString();
String EMAIL = email.getText().toString();
String CONTACT = contact.getText().toString();
String CITY = city.getText().toString();
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(nameKey,NAME);
editor.putString(emailKey,EMAIL);
editor.putString(contactKey,CONTACT);
editor.putString(cityKey,CITY);
editor.commit();
Toast.makeText(getApplicationContext(),"Data inserted",Toast.LENGTH_LONG).show();
name.setText("");
email.setText("");
contact.setText("");
city.setText("");
break;
case R.id.btnView:
sharedPreferences = getSharedPreferences(mainKey,MODE_PRIVATE);
if(sharedPreferences.contains(nameKey)){
name.setText(sharedPreferences.getString(nameKey,""));
}
if(sharedPreferences.contains(emailKey)){
email.setText(sharedPreferences.getString(emailKey,""));
}
if(sharedPreferences.contains(contactKey)){
contact.setText(sharedPreferences.getString(contactKey,""));
}
if(sharedPreferences.contains(cityKey)){
city.setText(sharedPreferences.getString(cityKey,""));
}
break;
case R.id.btnHOmeActivity:
Intent intent = new Intent(MainActivity.this, HomeActivity.class);
startActivity(intent);
break;
}
}
}
activity_home.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".HomeActivity">
<Button
android:id="@+id/showValues"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="50dp"
android:text="Show Value" />
<TextView
android:id="@+id/name_here"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="6dp"
android:text="Name here"
android:textSize="25sp" />
<TextView
android:id="@+id/email_here"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="6dp"
android:text="Email here"
android:textSize="25sp" />
<TextView
android:id="@+id/contact_here"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="6dp"
android:text="Contact here"
android:textSize="25sp" />
<TextView
android:id="@+id/city_here"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="6dp"
android:text="City here"
android:textSize="25sp" />
</LinearLayout>
HomeActivity.java
package com.example.malik.blog;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class HomeActivity extends AppCompatActivity {
Button buttonShowValue;
TextView name, email, contact, city;
public static final String mainKey = "mainKey";
public static final String nameKey = "nameKey";
public static final String emailKey = "emailKey";
public static final String contactKey = "contactKey";
public static final String cityKey = "cityKey";
SharedPreferences sharedPreferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
buttonShowValue = (Button) findViewById(R.id.showValues);
name = (TextView) findViewById(R.id.name_here);
email = (TextView) findViewById(R.id.email_here);
contact = (TextView) findViewById(R.id.contact_here);
city = (TextView) findViewById(R.id.city_here);
buttonShowValue.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sharedPreferences = getSharedPreferences(mainKey,MODE_PRIVATE);
if(sharedPreferences.contains(nameKey)){
name.setText(sharedPreferences.getString(nameKey,""));
}
if(sharedPreferences.contains(emailKey)){
email.setText(sharedPreferences.getString(emailKey,""));
}
if(sharedPreferences.contains(contactKey)){
contact.setText(sharedPreferences.getString(contactKey,""));
}
if(sharedPreferences.contains(cityKey)){
city.setText(sharedPreferences.getString(cityKey,""));
}
}
});
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.malik.blog">
<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>
<activity android:name=".HomeActivity"/>
</application>
</manifest>
build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.example.malik.blog"
minSdkVersion 18
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
testCompile 'junit:junit:4.12'
}
Example ::
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:focusableInTouchMode="true"
android:orientation="vertical"
android:padding="10dp"
tools:context=".MainActivity">
<EditText
android:id="@+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Name" />
<EditText
android:id="@+id/email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email" />
<EditText
android:id="@+id/contact"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Contact" />
<EditText
android:id="@+id/city"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="City" />
<Button
android:layout_width="250dp"
android:layout_height="wrap_content"
android:text="Insert"
android:id="@+id/btnInsert"
android:layout_gravity="center"
android:layout_marginTop="30dp"
/>
<Button
android:layout_width="250dp"
android:layout_height="wrap_content"
android:text="View"
android:id="@+id/btnView"
android:layout_gravity="center"
android:layout_marginTop="10dp"
/>
<Button
android:layout_width="250dp"
android:layout_height="wrap_content"
android:text="Open HomeActivity"
android:id="@+id/btnHOmeActivity"
android:layout_gravity="center"
android:layout_marginTop="10dp"
/>
</LinearLayout>
MainActivity.java
package com.example.malik.blog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.IOException;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
EditText name, email, contact, city;
Button insert, view, homeActivity;
public static final String mainKey = "mainKey";
public static final String nameKey = "nameKey";
public static final String emailKey = "emailKey";
public static final String contactKey = "contactKey";
public static final String cityKey = "cityKey";
SharedPreferences sharedPreferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
name = (EditText) findViewById(R.id.name);
email = (EditText) findViewById(R.id.email);
contact = (EditText) findViewById(R.id.contact);
city = (EditText) findViewById(R.id.city);
insert = (Button) findViewById(R.id.btnInsert);
view = (Button) findViewById(R.id.btnView);
homeActivity = (Button) findViewById(R.id.btnHOmeActivity);
insert.setOnClickListener(this);
view.setOnClickListener(this);
homeActivity.setOnClickListener(this);
sharedPreferences = getSharedPreferences(mainKey,MODE_PRIVATE);
if(sharedPreferences.contains(nameKey)){
name.setText(sharedPreferences.getString(nameKey,""));
}
if(sharedPreferences.contains(emailKey)){
email.setText(sharedPreferences.getString(emailKey,""));
}
if(sharedPreferences.contains(contactKey)){
contact.setText(sharedPreferences.getString(contactKey,""));
}
if(sharedPreferences.contains(cityKey)){
city.setText(sharedPreferences.getString(cityKey,""));
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnInsert:
String NAME = name.getText().toString();
String EMAIL = email.getText().toString();
String CONTACT = contact.getText().toString();
String CITY = city.getText().toString();
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(nameKey,NAME);
editor.putString(emailKey,EMAIL);
editor.putString(contactKey,CONTACT);
editor.putString(cityKey,CITY);
editor.commit();
Toast.makeText(getApplicationContext(),"Data inserted",Toast.LENGTH_LONG).show();
name.setText("");
email.setText("");
contact.setText("");
city.setText("");
break;
case R.id.btnView:
sharedPreferences = getSharedPreferences(mainKey,MODE_PRIVATE);
if(sharedPreferences.contains(nameKey)){
name.setText(sharedPreferences.getString(nameKey,""));
}
if(sharedPreferences.contains(emailKey)){
email.setText(sharedPreferences.getString(emailKey,""));
}
if(sharedPreferences.contains(contactKey)){
contact.setText(sharedPreferences.getString(contactKey,""));
}
if(sharedPreferences.contains(cityKey)){
city.setText(sharedPreferences.getString(cityKey,""));
}
break;
case R.id.btnHOmeActivity:
Intent intent = new Intent(MainActivity.this, HomeActivity.class);
startActivity(intent);
break;
}
}
}
activity_home.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".HomeActivity">
<Button
android:id="@+id/showValues"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="50dp"
android:text="Show Value" />
<TextView
android:id="@+id/name_here"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="6dp"
android:text="Name here"
android:textSize="25sp" />
<TextView
android:id="@+id/email_here"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="6dp"
android:text="Email here"
android:textSize="25sp" />
<TextView
android:id="@+id/contact_here"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="6dp"
android:text="Contact here"
android:textSize="25sp" />
<TextView
android:id="@+id/city_here"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="6dp"
android:text="City here"
android:textSize="25sp" />
</LinearLayout>
HomeActivity.java
package com.example.malik.blog;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class HomeActivity extends AppCompatActivity {
Button buttonShowValue;
TextView name, email, contact, city;
public static final String mainKey = "mainKey";
public static final String nameKey = "nameKey";
public static final String emailKey = "emailKey";
public static final String contactKey = "contactKey";
public static final String cityKey = "cityKey";
SharedPreferences sharedPreferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
buttonShowValue = (Button) findViewById(R.id.showValues);
name = (TextView) findViewById(R.id.name_here);
email = (TextView) findViewById(R.id.email_here);
contact = (TextView) findViewById(R.id.contact_here);
city = (TextView) findViewById(R.id.city_here);
buttonShowValue.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sharedPreferences = getSharedPreferences(mainKey,MODE_PRIVATE);
if(sharedPreferences.contains(nameKey)){
name.setText(sharedPreferences.getString(nameKey,""));
}
if(sharedPreferences.contains(emailKey)){
email.setText(sharedPreferences.getString(emailKey,""));
}
if(sharedPreferences.contains(contactKey)){
contact.setText(sharedPreferences.getString(contactKey,""));
}
if(sharedPreferences.contains(cityKey)){
city.setText(sharedPreferences.getString(cityKey,""));
}
}
});
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.malik.blog">
<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>
<activity android:name=".HomeActivity"/>
</application>
</manifest>
build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.example.malik.blog"
minSdkVersion 18
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
testCompile 'junit:junit:4.12'
}
