这种存储方式是用来保存用户的设置的参数的
private Context context;
public PreferenceService(Context context)
{
this.context = context;
}
public void save(String name, Integer valueOf)
{
//第一个参数为文件名称，千万不要指定后缀名
SharedPreferences preferences =
context.getSharedPreferences("zhao", Context.MODE_PRIVATE);
Editor editor =
preferences.edit();//获取编辑器
editor.putString("name",
name);
editor.putInt("age", valueOf);
editor.commit();
//一定不能忘了这句代码，把数据提交回去
}
public Map<String,String>
getPreferences(){
Map<String,String> params= new HashMap<String,
String>();
SharedPreferences preferences =
context.getSharedPreferences("zhao",
Context.MODE_PRIVATE);
params.put("name", preferences.getString("name",
""));
params.put("age",String.valueOf(preferences.getInt("age",0)));
return
params;
}
public class MainActivity extends Activity {
private EditText nameText;
private EditText
ageText;
PreferenceService service;
@Override
protected void
onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
nameText=(EditText)this.findViewById(R.id.name);
ageText=(EditText)this.findViewById(R.id.age);
service
= new PreferenceService(getApplicationContext());
Map<String,String>
params =
service.getPreferences();
nameText.setText(params.get("name"));
ageText.setText(params.get("age"));
}
public void save(View v){
//this.getPreferences(MainActivity.this.MODE_PRIVATE);
//可直接操作,默认名称使用Activity的名称就是MainActivity
String name =
nameText.getText().toString();
String age =
ageText.getText().toString();
service.save(name,Integer.valueOf(age));
Toast.makeText(getApplicationContext(), R.string.success,
Toast.LENGTH_LONG).show();
}
@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;
}
}