Android开发之SharedPreferences数据存储与提取

<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<Button
android:id="@+id/save_data"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Save data"
/>

<Button
android:id="@+id/restore_data"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="69dp"
android:text="Restore data" />

</RelativeLayout>

package com.example.sharedpreferences;

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

public class MainActivity extends Activity {

private Button saveData;
private Button restoreData;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
saveData=(Button)findViewById(R.id.save_data);
restoreData=(Button)findViewById(R.id.restore_data);
restoreData.setOnClickListener(new OnClickListener(){
public void onClick(View v)
{
SharedPreferences pref=getSharedPreferences("data",MODE_PRIVATE);
String name=pref.getString("name", "");
int age=pref.getInt("age", 0);
boolean married=pref.getBoolean("married", false);

Log.d("MainActivity", "name is "+name);
Log.d("MainActivity","age is "+age);
Log.d("MainActivity","married is"+married);
}
});
saveData.setOnClickListener(new OnClickListener(){
public void onClick(View v)
{
SharedPreferences.Editor editor=getSharedPreferences("data",MODE_PRIVATE).edit();
editor.putString("name", "Tom");
editor.putInt("age", 28);
editor.putBoolean("married", false);
editor.commit();
}
});
}

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

}