实例教程五：采用SharedPreferences保存用户偏好设置参数

android水管工人游戏源码
http://www.eoeandroid.com/thread-207446-1-1.html

Android推箱子小游戏
http://www.eoeandroid.com/thread-207439-1-1.html

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http://www.eoeandroid.com/thread-207522-1-1.html

<?xml version="1.0" encoding="utf-8"?>
 
<resources>
 
    <string name="hello">Hello World, MainActivity!</string>
    <string name="app_name">软件参数设置</string>
    <string name="name">姓名</string>
    <string name="age">年龄</string>
    <string name="save">保存参数</string>
    <string name="success">保存完成</string>
 
</resources>

package cn.itcast.service;
 
import java.util.HashMap;
import java.util.Map;
import android.content.Context; 
import android.content.SharedPreferences; 
import android.content.SharedPreferences.Editor;
 

public class PrefercesService {
 
        private Context context;        
        public PrefercesService(Context context){ 
                this.context = context; 
        }
 

        /** 
         * 保存参数 
         * @param name 姓名
         * @param age 年龄 
         */
 
        public void save(String name, Integer age) {
 
                SharedPreferences perferences = context.getSharedPreferences("itcast", Context.MODE_PRIVATE); 
                Editor editor = perferences.edit(); 
                editor.putString("name", name); 
                editor.putInt("age", age); 
                editor.commit();
 
        } 
        
        /** 
         * 获取各项配置参数 
         * @return 
         */
 
        public Map<String, String> getPreferces(){
 
                Map<String, String> params = new HashMap<String, String>();
                SharedPreferences perferences = context.getSharedPreferences("itcast", Context.MODE_PRIVATE);
                params.put("name", perferences.getString("name", null));
                params.put("age", String.valueOf(perferences.getInt("age", 0)));
                return params;
 
        }
 
}
 

package cn.itcast.settings;
 

import java.util.Map;
 

import cn.itcast.service.PrefercesService;
 
import android.app.Activity;
 
import android.os.Bundle;
 
import android.view.View;
 
import android.widget.EditText;
 
import android.widget.Toast;
 

public class MainActivity extends Activity {
 
    private EditText edtName;
 
    private EditText edtAge;
 
    private PrefercesService service;
 
    
    @Override
 
    public void onCreate(Bundle savedInstanceState) {
 
        super.onCreate(savedInstanceState);
 
        setContentView(R.layout.main);
 
        
 
        edtName = (EditText)this.findViewById(R.id.edtName);
 
        edtAge = (EditText)this.findViewById(R.id.edtAge);
 
        
 
        service = new PrefercesService(this);
 
        
 
        Map<String, String> params = service.getPreferces();
 
        edtName.setText(params.get("name"));
 
        edtAge.setText(params.get("age"));
 
    }
 
    
    public void save(View v){
 
            String name = edtName.getText().toString();
 
            String age = edtAge.getText().toString();
 
            
            
            service.save(name, Integer.valueOf(age));            
            Toast.makeText(getApplicationContext(), R.string.success, 1).show();
 
    }
 
}