Android的SharedPreferences存储

我是 用于保存用户名

//////////登录
	private SharedPreferences share;// 信息存储类
	private SharedPreferences.Editor edit;
// 创建userinfo文件
		share = LoginActivity.this.getSharedPreferences("userinfo",
				Context.MODE_PRIVATE);

		login = (Button) findViewById(R.id.login);
		username = (EditText) findViewById(R.id.username);
		password = (EditText) findViewById(R.id.password);

	login.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				// TODO Auto-generated method stub
				// rs=new ArrayList<Map<String,Object>>();
			
					/*
					 * 登录成功后 将用户信息写入到sharedpreferences文件userinfo中
					 */
					edit = share.edit();
					s
					edit.commit();
					/*
					 * 跳转到主页面
					 */
					Toast.makeText(LoginActivity.this, "登录成功", 3000).show();

			}
		});

 @Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
super.onCreateOptionsMenu(menu);
menu.add(0, ITEM0, 0, "注销登录");
return true;


}


@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case ITEM0:

Toast.makeText(this, "执行注销！", 1000).show();
startActivity(new Intent(this, LoginActivity.class));
editor = share.edit();
editor.clear();
editor.commit();
finish();
break;
}
return super.onOptionsItemSelected(item);
}