Shared Preferences Demo

Demo:

1)main.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="#ffffff"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="50dp"

        android:text="Enter Name"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:textColor="@color/color_black" />

    <EditText

        android:id="@+id/edt1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" >

        <requestFocus />

    </EditText>

    <Button

        android:id="@+id/btnSave"

        android:layout_width="100dp"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:text="Save" />

    <Button

        android:id="@+id/btnShowData"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginTop="50dp"

        android:text="Show Saved Data"

        android:textSize="15dp" />

</LinearLayout>

2)Activity: 

package com.venky.sharedpreferences;

import android.app.Activity;

import android.content.SharedPreferences;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class SharedPreferencesActivity extends Activity {

      /** Called when the activity is first created. */

      EditText edt1;

      @Override

      public void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.main);

            edt1 = (EditText) findViewById(R.id.edt1);

            Button btnSave = (Button) findViewById(R.id.btnSave);

            Button btnShowData = (Button) findViewById(R.id.btnShowData);

            btnSave.setOnClickListener(new OnClickListener() {

                  @Override

                  public void onClick(View v) {

                        // TODO Auto-generated method stub

                        String data = edt1.getText().toString().trim();

                        SharedPreferences sp = getSharedPreferences("shared_db", 1);

                        SharedPreferences.Editor editor = sp.edit();

                        editor.putString("data", data);

                        editor.commit();

                        Toast.makeText(getApplicationContext(),

                                    "Successfully Saved your Name", Toast.LENGTH_SHORT)

                                    .show();

                        edt1.setText("");

                  }

            });

            btnShowData.setOnClickListener(new OnClickListener() {

                  @Override

                  public void onClick(View v) {

                        // TODO Auto-generated method stub

                        SharedPreferences sp = getSharedPreferences("shared_db", 1);

                        String savedData = sp.getString("data", "no value in sp");

                        Toast.makeText(getApplicationContext(),

                                    "Saved Name is => " + savedData, Toast.LENGTH_SHORT)

                                    .show();

                  }

            });

      }

}