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Friday, May 17, 2013

Shared Preference Demo

Demo example of shared preference how to work in android.


MainActivity.java

package com.demosharedpreference;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       
        Button next = (Button) findViewById(R.id.btn_next);
       
        next.setOnClickListener(new OnClickListener() {
           
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
               
                SharedPreferences preferences = getSharedPreferences("myPrefss",  getApplicationContext().MODE_PRIVATE);
                SharedPreferences.Editor editor = preferences.edit();
                editor.putString("CurrentPlace", "abcd");
                editor.commit();
               
                Intent intent = new Intent(getApplicationContext(),Next.class);
                startActivity(intent);
               
            }
        });
    }

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

}


activity_main.xml

<RelativeLayout 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"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/btn_next"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Next" />

</RelativeLayout>


Next.java

package com.demosharedpreference;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.TextView;

public class Next extends Activity{
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
   
        setContentView(R.layout.next);
       
        SharedPreferences preferences = getSharedPreferences("myPrefss",  getApplicationContext().MODE_PRIVATE);
   
        TextView text = (TextView) findViewById(R.id.textView1);
       
        String str = preferences.getString("CurrentPlace", "");
        text.setText(str);
       
    }

}


next.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Large Text"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>

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