今天我们讲下SharedPreferences的使用，就是读取或写入数据到内存中，比较简单，我们直接看代码吧。

package com.example.sharedpreferences_01;

import android.os.Bundle;
import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;
import android.view.Menu;

public class MainActivity extends Activity {
	
	private SharedPreferences pref;
	Editor editor;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //实例化一个SharedPreferences对象
        pref = getSharedPreferences("myPref", MODE_PRIVATE);
        //实例化editor对象的方法
        editor = pref.edit();
        //存放数据
        editor.putString("name", "张三");
        editor.putInt("age", 20);
        editor.putBoolean("isMarry", false);
        editor.putLong("time", System.currentTimeMillis());
    
        editor.commit();
        editor.remove("time");
        editor.commit();
        
        Log.i("main", pref.getString("name", ""));    //获取数据
        Log.i("main", "" + pref.getInt("age", 0));
        
    }

    
}