SharedPreferences保存数据以及取出数据

XML布局：两个EditText（账号和密码），两个Button（保存和取出）

代码：

private EditText et_userName, et_passWord; private Button bt2, bt3;

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_userName = (EditText) findViewById(R.id.editText1); et_passWord = (EditText) findViewById(R.id.editText2); bt2 = (Button) findViewById(R.id.button2); bt3 = (Button) findViewById(R.id.button3); bt2.setOnClickListener(this); bt3.setOnClickListener(this);

}

@Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.button2: // 用SharedPreferences保存数据（SharedPreferences可在stop()方法之后保存当前的数据） SharedPreferences sp = getSharedPreferences("User", 0); Editor edit = sp.edit(); edit.putString("name", et_userName.getText().toString().trim()); edit.putString("pwd", et_passWord.getText().toString().trim()); edit.commit(); break; case R.id.button3:(取出数据) SharedPreferences sp1 = getSharedPreferences("User", 0); String name = sp1.getString("name",""); String pwd = sp1.getString("pwd", ""); et_userName.setText(name); et_passWord.setText(pwd); break; }

}

关键代码：

SharedPreferences保存数据：

                            SharedPreferences   sp  = getSharedPreferences("表名", 0)；                             Editor edit = sp.edit();                              edit.putString("键名","值");

                              edit.commit()；//提交

SharedPreferences取出数据：

                            SharedPreferences   sp1  = getSharedPreferences("表名", 0)                            String name = sp1.getString("键名","如果键名不存在，默认显示当前String")；