android - 如何在android中的共享首选项中存储多个值？

Question

文件名 = MainActivity.java

公共(public)类 MainActivity 扩展 Activity {

TextView textView1;
EditText editText1,editText2;
Button button1,button2;
public static final String Default = "NA";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    textView1 = (TextView)findViewById(R.id.textViewSignup);        
    textView1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
        Intent i = new Intent(MainActivity.this,Sign_up.class);
        startActivity(i);
        }
    });
    editText1=(EditText)findViewById(R.id.editText1);
    editText2=(EditText)findViewById(R.id.editText2);
    button1 =(Button)findViewById(R.id.button1);
    button2 =(Button)findViewById(R.id.button2);


    button1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            SharedPreferences preferences = getSharedPreferences("Login Credentials",MODE_PRIVATE);

            String firstname=preferences.getString("Name",Default );
            String email= preferences.getString("Email",Default );
            String password=preferences.getString("Password", Default);




            if(editText1.getText().toString().equals(firstname)&&
                    editText2.getText().toString().equals(password)){

                Toast.makeText(getApplicationContext(), "Welcome User", Toast.LENGTH_SHORT).show();
        }else
        {
            Toast.makeText(getApplicationContext(), "Wrong User", Toast.LENGTH_SHORT).show();

        }
            }
    });
    button2.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
        finish();   
        }
    });



}

第二个文件名 = Signup.java

公共(public)类 Sign_up 扩展 MainActivity 实现 OnClickListener{

   public static final String Default = "MyPrefs" ;


  String name,email,password,confirmpassword;
  EditText et1,et2,et3,et4;
  TextView textView;
  Button button;
  SharedPreferences preferences;
  Editor editor;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.sign_up);

    et1 = (EditText)findViewById(R.id.editTextName);
    et2 = (EditText)findViewById(R.id.editEmail);
    et3 = (EditText)findViewById(R.id.editPassword);
    et4 = (EditText)findViewById(R.id.editConPassword);
    button = (Button)findViewById(R.id.buttonSignup);
    textView = (TextView)findViewById(R.id.textViewLoginhere);
    button.setOnClickListener(this);


    textView.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent intent = new Intent(Sign_up.this,MainActivity.class);
            startActivity(intent);
        }
    });


}
//public void sharedPrefarence(){


//}
@Override
public void onClick(View arg0) {
    // TODO Auto-generated method stub
    preferences = getSharedPreferences("Login Credentials", MODE_PRIVATE);
    SharedPreferences.Editor editor=preferences.edit();
    //editor = preferences.edit();
    editor.putString("Name", et1.getText().toString());
    editor.putString("Email",et2.getText().toString());
    editor.putString("Password", et3.getText().toString());
    editor.putString("Confirmpassword", et4.getText().toString());
    editor.commit();

    Toast.makeText(getApplicationContext(), "Added Successful",
            Toast.LENGTH_SHORT).show();
}

此代码有效，但当我添加新用户时， key 被覆盖，这就是为什么它无法存储多个值，所以请给我正确的建议

感谢和问候拉克什

Answer 1

共享首选项仅存储简单的名称/值对。它们的键名是唯一的，因此当您为“姓名”、“电子邮件”、“密码”和“确认密码”输入值时，它总是会覆盖原来的内容。

看起来您需要多组这些字段，因此您可能希望将数据存储在 sqllite 数据库中。