SharedPreferences设置用户参数

首先活动页面

package com.example.myproject3;

import java.util.HashMap;
import java.util.Map;

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

import com.example.myproject3.service.PerfernceService;

public class MainActivity extends Activity {
private final static String Tag="MainActivity.class";
private EditText editage;
private EditText editname;
private PerfernceService service;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  editage=(EditText)findViewById(R.id.age);
  editname=(EditText)findViewById(R.id.username);
  service=new PerfernceService(getApplicationContext());
  Map<String, String> params=service.getperfence();
  editname.setText(params.get("name"));
  editage.setText(params.get("age"));
  
  
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }
 
 
 public void save(View v)
 {
  Log.i(Tag, "人生总是无奈");
  service.saveInfo(editname.getText().toString(),  Integer.valueOf(editage.getText().toString()));
  Toast.makeText(getApplicationContext(), "成功保存", 1).show();
  
 }
 

}
--------------

服务处理业务

 

 

package com.example.myproject3.service;

import java.util.HashMap;
import java.util.Map;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;

public class PerfernceService {

 
    private Context context;
   
    public PerfernceService(){}
    /**
     *
     * 保存参数
     *
     * @param name 
     * @param age
     */
    public PerfernceService(Context context)
    {
   this.context=context;
    
    }
   
    public void saveInfo(String name,Integer age)
    {
     SharedPreferences perfence=context.getSharedPreferences("itcast", context.MODE_PRIVATE);
     Editor editor=perfence.edit();
     editor.putString("name", name);
     editor.putInt("age", age);
     editor.commit();
    }
   
  public  Map<String,String> getperfence()
  {
   Map<String,String> params=new HashMap<String, String>();
   SharedPreferences perfence=context.getSharedPreferences("itcast", Context.MODE_PRIVATE);
   params.put("name",perfence.getString("name", ""));
   params.put("age", String.valueOf(perfence.getInt("age", 0)));
   return params;
  }
 
}