public abstract SharedPreferences getSharedPreferences (String name, int mode);

getBoolean,getInt,getFloat,getLong.
   public abstract String getString (String key, String defValue);

   public abstract SharedPreferences.Editor edit ();
   public abstract SharedPreferences.Editor putString (String key, String value);
   public abstract boolean commit ();

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:orientation="vertical" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent"> 
   
  <TextView  
    android:id="@+id/textview" 
    android:layout_width="fill_parent"  
    android:layout_height="wrap_content"  
    android:text="@string/hello"/> 
   
</LinearLayout> 

package com.android.test; 
import android.app.Activity; 
import android.content.SharedPreferences; 
import android.os.Bundle; 
import android.preference.PreferenceManager; 
import android.widget.TextView; 
public class TestSharedPreferences extends Activity { 
  /** Called when the activity is first created. */ 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
     
    SharedPreferences mSharedPreferences = getSharedPreferences("TestSharedPreferences", 0); 
//    SharedPreferences mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); 
     
    int counter = mSharedPreferences.getInt("counter", 0); 
     
    TextView mTextView = (TextView)findViewById(R.id.textview); 
    mTextView.setText("This app has been started " + counter + " times."); 
     
    SharedPreferences.Editor mEditor = mSharedPreferences.edit(); 
    mEditor.putInt("counter", ++counter); 
    mEditor.commit(); 
     
  } 
}