In this tutorial how to store data in Shared Preference\u00a0in an Android Application is shown.<\/p>\n
By using Shared Preference, we can store the data in pair of key & values.<\/p>\n
By using Shared Preference, we can store the small collection of data.<\/p>\n
A SharedPreference object points to a file containing key & value pairs and it provides a simple method to read and write.<\/p>\n
The SharedPreference file is accessed by calling getSharedPreference() method and getPreference() method.<\/p>\n
The getSharedPreference() method will access the multiple shared preferences where as getPreference() method will access only one shared preference.<\/p>\n
It is widely used to get information from user such as in settings.<\/p>\n
For ex. Synchronised Gmail Account.<\/p>\n
Point to Remember:<\/p>\n
Code:<\/p>\n
activity_main.xml<\/p>\n
<RelativeLayout xmlns:android=”http:\/\/schemas.android.com\/apk\/res\/android”
\nxmlns:tools=”http:\/\/schemas.android.com\/tools”
\nandroid:layout_width=”match_parent”
\nandroid:layout_height=”match_parent”
\nandroid:paddingBottom=”@dimen\/activity_vertical_margin”
\nandroid:paddingLeft=”@dimen\/activity_horizontal_margin”
\nandroid:paddingRight=”@dimen\/activity_horizontal_margin”
\nandroid:paddingTop=”@dimen\/activity_vertical_margin”
\ntools:context=”.MainActivity” ><\/p>\n
<TextView
\nandroid:id=”@+id\/textPrefs”
\nandroid:layout_width=”wrap_content”
\nandroid:layout_height=”wrap_content”
\nandroid:layout_below=”@+id\/showinfo”
\nandroid:layout_centerHorizontal=”true”
\nandroid:layout_marginTop=”54dp” \/><\/p>\n
<TextView
\nandroid:id=”@+id\/textView2″
\nandroid:layout_width=”wrap_content”
\nandroid:layout_height=”wrap_content”
\nandroid:layout_alignBottom=”@+id\/storeinfo”
\nandroid:layout_centerHorizontal=”true”
\nandroid:layout_marginBottom=”78dp”
\nandroid:text=”Data Preference Example” \/><\/p>\n
<Button
\nandroid:id=”@+id\/storeinfo”
\nandroid:layout_width=”wrap_content”
\nandroid:layout_height=”wrap_content”
\nandroid:layout_alignParentTop=”true”
\nandroid:layout_alignRight=”@+id\/textView2″
\nandroid:layout_marginTop=”139dp”
\nandroid:text=”Store Information” \/><\/p>\n
<Button
\nandroid:id=”@+id\/showinfo”
\nandroid:layout_width=”wrap_content”
\nandroid:layout_height=”wrap_content”
\nandroid:layout_alignRight=”@+id\/storeinfo”
\nandroid:layout_below=”@+id\/textView2″
\nandroid:layout_marginTop=”47dp”
\nandroid:text=”Show Information” \/><\/p>\n
<\/RelativeLayout><\/p>\n
res\/xml\/prefs.xml<\/p>\n
<?xml version=”1.0″ encoding=”utf-8″?>
\n<PreferenceScreen xmlns:android=”http:\/\/schemas.android.com\/apk\/res\/android” >
\n<PreferenceCategory
\nandroid:summary=”Username and Password Information”
\nandroid:title=”Login Information”>
\n<EditTextPreference
\nandroid:key=”username”
\nandroid:summary=”Enter your username”
\nandroid:title=”Username”><\/EditTextPreference>
\n<EditTextPreference
\nandroid:key=”password”
\nandroid:summary=”Enter your password”
\nandroid:title=”Password”><\/EditTextPreference>
\n<\/PreferenceCategory>
\n<PreferenceCategory
\nandroid:summary=”Username and Password Information”
\nandroid:title=”Settings”>
\n<CheckBoxPreference
\nandroid:key=”checkBox”
\nandroid:summary=”On\/Off”
\nandroid:title=”Keep me logged in”\/>
\n<ListPreference
\nandroid:entries=”@array\/listOptions”
\nandroid:entryValues=”@array\/listValues”
\nandroid:key=”listpref”
\nandroid:summary=”List Preference Example”
\nandroid:title=”List Preference”\/>
\n<\/PreferenceCategory><\/p>\n
<\/PreferenceScreen><\/p>\n
res\/values\/array.xml<\/p>\n
<?xml version=”1.0″ encoding=”utf-8″?>
\n<resources>
\n<string-array name=”listOptions”>
\n<item>English<\/item>
\n<item>French<\/item>
\n<item>German<\/item>
\n<item>Arabic<\/item>
\n<item>Hindi<\/item>
\n<item>Other<\/item>
\n<\/string-array>
\n<string-array name=”listValues”>
\n<item>English Language<\/item>
\n<item>French Language<\/item>
\n<item>German Language<\/item>
\n<item>Arabic Language<\/item>
\n<item>Hindi Language<\/item>
\n<item>Other Language<\/item>
\n<\/string-array><\/p>\n
<\/resources><\/p>\n
MainActivity.java<\/p>\n
package com.example.demo;<\/p>\n
import android.os.Bundle;
\nimport android.preference.PreferenceManager;
\nimport android.app.Activity;
\nimport android.content.Intent;
\nimport android.content.SharedPreferences;
\nimport android.view.Menu;
\nimport android.view.View;
\nimport android.widget.Button;
\nimport android.widget.TextView;<\/p>\n
public class MainActivity extends Activity{<\/p>\n
TextView tv;<\/p>\n
@Override
\nprotected void onCreate(Bundle savedInstanceState) {
\nsuper.onCreate(savedInstanceState);
\nsetContentView(R.layout.activity_main);
\nButton storeinfo=(Button)findViewById(R.id.storeinfo);
\nButton showinfo=(Button)findViewById(R.id.showinfo);
\ntv=(TextView)findViewById(R.id.textPrefs);<\/p>\n
View.OnClickListener listener=new View.OnClickListener() {<\/p>\n
@Override
\npublic void onClick(View v) {
\n\/\/ TODO Auto-generated method stub
\nswitch(v.getId())
\n{
\ncase R.id.storeinfo:
\nIntent intent=new Intent(MainActivity.this,PrefsActivity.class);
\nstartActivity(intent);
\nbreak;
\ncase R.id.showinfo:
\ndisplaySharedPreferences();
\nbreak;
\ndefault:
\nbreak;
\n}
\n}
\n};
\nstoreinfo.setOnClickListener(listener);
\nshowinfo.setOnClickListener(listener);
\n}<\/p>\n
private void displaySharedPreferences(){
\nSharedPreferences prefs=PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
\nString username=prefs.getString(“username”, “Default Username”);
\nString password=prefs.getString(“password”, “Default Password”);
\nboolean checkBox=prefs.getBoolean(“checkBox”, false);
\nString listPrefs=prefs.getString(“listpref”,”Default list prefs”);
\nStringBuilder builder=new StringBuilder();
\nbuilder.append(“Username: “+username+”\\n”);
\nbuilder.append(“Password: “+password+”\\n”);
\nbuilder.append(“Keep me logged in: “+String.valueOf(checkBox)+”\\n”);
\nbuilder.append(“List Preference: “+listPrefs);
\ntv.setText(builder.toString());
\n}<\/p>\n
@Override
\npublic boolean onCreateOptionsMenu(Menu menu) {
\n\/\/Inflate the menu; this adds items to the action bar if it is present.
\ngetMenuInflater().inflate(R.menu.main, menu);
\nreturn true;
\n}
\n}<\/p>\n
PrefsActivity.java<\/p>\n
package com.example.demo;<\/p>\n
import android.os.Bundle;
\nimport android.preference.PreferenceActivity;<\/p>\n
public class PrefsActivity extends PreferenceActivity{
\n@Override
\nprotected void onCreate(Bundle savedInstanceState) {
\nsuper.onCreate(savedInstanceState);
\naddPreferencesFromResource(R.xml.prefs);
\n}<\/p>\n
}<\/p>\n
AndroidManifest.xml<\/p>\n
<?xml version=”1.0″ encoding=”utf-8″?>
\n<manifest xmlns:android=”http:\/\/schemas.android.com\/apk\/res\/android”
\npackage=”com.example.demo”
\nandroid:versionCode=”1″
\nandroid:versionName=”1.0″ ><\/p>\n
<uses-sdk
\nandroid:minSdkVersion=”8″
\nandroid:targetSdkVersion=”17″ \/><\/p>\n
<application
\nandroid:allowBackup=”true”
\nandroid:icon=”@drawable\/ic_launcher”
\nandroid:label=”@string\/app_name”
\nandroid:theme=”@style\/AppTheme” >
\n<activity
\nandroid:name=”com.example.demo.MainActivity”
\nandroid:label=”@string\/app_name” >
\n<intent-filter>
\n<action android:name=”android.intent.action.MAIN” \/><\/p>\n
<category android:name=”android.intent.category.LAUNCHER” \/>
\n<\/intent-filter>
\n<\/activity>
\n<activity android:name=”.PrefsActivity”><\/activity><\/p>\n
<\/application><\/p>\n
<\/manifest><\/p>\n