exampleuse SharedPreferences

exampleuse.java

/*
 * to access from: data/data/com.android.SharedPreferences/share_prefs
 */
public class exampleuse extends Activity {
    public final static String COLUMN_NAME ="name";
    public final static String COLUMN_MOBILE ="mobile";
    
    exampleHelper sp;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.main);
        
        sp = new exampleHelper(this, "contacts");
        
        //1. to store some value
        sp.putValue(COLUMN_NAME, "Mr WANG");
        sp.putValue(COLUMN_MOBILE, "XXXXXXXXXX");
        
        
        //2. to fetch the value
        String name = sp.getValue(COLUMN_NAME);
        String mobile = sp.getValue(COLUMN_MOBILE);
        
        TextView tv = new TextView(this);
        tv.setText("NAME:"+ name + "\n" + "MOBILE:" + mobile);
        
        setContentView(tv);
    }
}

exampleHelper

public class exampleHelper {
  SharedPreferences sp;
  SharedPreferences.Editor editor;
  
  Context context;
  
  public exampleHelper(Context c,String name){
    context = c;
    sp = context.getSharedPreferences(name, 0);
    editor = sp.edit();
  }
  
  public void putValue(String key, String value){
    editor = sp.edit();
    editor.putString(key, value);
    editor.commit();
  }

  public String getValue(String key){
    return sp.getString(key, null);
  }
  
}

main.xml

<?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:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
</LinearLayout>