android基础开发之sharedPreference

SharePreference存储技术在android中主要应用于保存一些简单信息&＃xff0c;提高用户体验性&＃xff0c;通常用于保存用户登录信息中&＃xff0c;下面是一个使用SharePreference存储的小示例。代码如下&＃xff1a;

首先是部局文件&＃xff1a; 

主程序代码&＃xff1a;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.CompoundButton.OnCheckedChangeListener;public class Main extends Activity implements OnCheckedChangeListener
{//定义存在文件名称private final String PREFERENCE_NAME &＃61; "survey";private EditText name;private EditText habit;private CheckBox cbEmployee;private RadioGroup rgCompanyType;private RadioButton rbCompany1;private RadioButton rbCompany2;private RadioButton rbCompany3;&＃64;Overrideprotected void onStop(){/*** 关闭程序调用&＃xff0c;保存信息*/SharedPreferences mySharedPreferences &＃61; getSharedPreferences(PREFERENCE_NAME, Activity.MODE_PRIVATE);SharedPreferences.Editor editor &＃61; mySharedPreferences.edit();//获取要保持信息&＃xff0c;进行存储editor.putString("name", name.getText().toString());editor.putString("habit", habit.getText().toString());editor.putBoolean("employee", cbEmployee.isChecked());editor.putInt("companyTypeId", rgCompanyType.getCheckedRadioButtonId());//提交事务editor.commit();super.onStop();}&＃64;Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked){rbCompany1.setEnabled(isChecked);rbCompany2.setEnabled(isChecked);rbCompany3.setEnabled(isChecked);}&＃64;Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);name &＃61; (EditText) findViewById(R.id.etName);habit &＃61; (EditText) findViewById(R.id.etHabit);cbEmployee &＃61; (CheckBox) findViewById(R.id.cbEmployee);rgCompanyType &＃61; (RadioGroup) findViewById(R.id.rgCompanyType);rbCompany1 &＃61; (RadioButton) findViewById(R.id.rbCompany1);rbCompany2 &＃61; (RadioButton) findViewById(R.id.rbCompany2);rbCompany3 &＃61; (RadioButton) findViewById(R.id.rbCompany3);//为单选按钮设置监听cbEmployee.setOnCheckedChangeListener(this);/*** 获取SharedPreferences对象用于存储操作* &＃64;parma name 文件名称* &＃64;parma mode */SharedPreferences sharedPreferences &＃61; getSharedPreferences(PREFERENCE_NAME, Activity.MODE_PRIVATE);/*** 设置初始默认值* sharedPreferences调用get()方法获取对象中的值* 第一个参数为取值的key&＃xff0c;第二个参数为默认值*/name.setText(sharedPreferences.getString("name", ""));habit.setText(sharedPreferences.getString("habit", ""));cbEmployee.setChecked(sharedPreferences.getBoolean("employee", false));rgCompanyType.check(sharedPreferences.getInt("companyTypeId", -1));onCheckedChanged(cbEmployee, cbEmployee.isChecked());}}