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?????? //?当你第一次登录时,输入用户名、密码之后,按“登录”键,在其onclick函数中:
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???????// 保存用户名与密码
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?????? ?Username = (EditText) findViewById(R.id.mainEdit_01);????????//编辑框对象
??????? Password = (EditText) findViewById(R.id.mainEdit_02);
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?????? ??User = Username.getText().toString();??????????????
???????? Psw = Password.getText().toString();
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??????? SharedPreferences preference = getSharedPreferences("person",Context.MODE_PRIVATE);
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??????? Editor edit = preference.edit();
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??????? edit.putString("User",User);??????
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??????? edit.putString("Psw",Psw);
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??????? edit.commit();
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?????? //在主界面初始化时,加载上一次保存的用户名与密码
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??????? public void onCreate(Bundle savedInstanceState) {
???? ?? super.onCreate(savedInstanceState);
?????? ?setContentView(R.layout.main);
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?????? ?Username = (EditText) findViewById(R.id.mainEdit_01);????????//编辑框对象
??????? Password = (EditText) findViewById(R.id.mainEdit_02);
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??????? SharedPreferences preference = getSharedPreferences("person",Context.MODE_PRIVATE);
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????????Username.setText(preference.getString("User",""));????????????//preference.getString(标示符,默认值<这里为空>)
????????Password.setText(preference.getString("Psw", ""));
注意:这里的preference要分开定义,不能用同一个preference,不然无法生效