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안녕하세요. 사용자 인증을 위해 서버의 사용자 이름과 암호를 확인하는 로그인 활동이 있습니다. 나는 사용자가 매번 로그인하지 않을 수 있도록 username과 password를 저장하기 위해 sharedpermissions를 사용하고 싶다. 나는 또한 로그인 버튼을 만들고 싶다. 나는 그것을 구현하려했지만 로그인 활동을 건너 뛴다. 나의 두 번째 활동으로 나를 데려 간다. 나는 sharedpermission 코드 중 일부를 의견 (//)으로 남겼습니다.SHARED PREFERENCE (java, sql database LOGIN) 구현 방법
누구나 내가 할 수있는 최선의 것을 말해 줄 수 있습니까?
public class LoginActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//String username = "";
//String password = "";
//SharedPreferences pre;
final EditText etUsername = (EditText) findViewById(R.id.etUsername);
final EditText etPassword = (EditText) findViewById(R.id.etPassword);
final TextView tvRegisterLink = (TextView) findViewById(R.id.tvRegisterhere);
final Button bLogin = (Button) findViewById(R.id.bLogin);
if(TextUtils.isEmpty(etUsername.getText().toString())||TextUtils.isEmpty(etPassword.getText().toString())){
Intent intent = new Intent(LoginActivity.this, UserAreaActivity.class);
LoginActivity.this.startActivity(intent);
} else {
Intent registerIntent = new Intent(LoginActivity.this, LoginActivity.class);
LoginActivity.this.startActivity(registerIntent);
}
final String username1 = SharedPreferenceUtils.getUsername(this);
final String password1 = SharedPreferenceUtils.getPassword(this);
// pre = getSharedPreferences("pref",MODE_PRIVATE);
//if(pre.getBoolean("username",true) && pre.getBoolean("password",true)){
tvRegisterLink.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent registerIntent = new Intent(LoginActivity.this, RegisterActivity.class);
LoginActivity.this.startActivity(registerIntent);
}
});
bLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String username = etUsername.getText().toString();
final String password = etPassword.getText().toString();
// Response received from the server
Response.Listener<String> responseListener = new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonResponse = new JSONObject(response);
boolean success = jsonResponse.getBoolean("success");
if (success) {
String name = jsonResponse.getString("name");
SharedPreferenceUtils.createSP(LoginActivity.this,username1,password1);
Intent intent = new Intent(LoginActivity.this, UserAreaActivity.class);
intent.putExtra("name", name);
intent.putExtra("username", username);
LoginActivity.this.startActivity(intent);
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(LoginActivity.this);
builder.setMessage("Login Failed")
.setNegativeButton("Retry", null)
.create()
.show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
};
LoginRequest loginRequest = new LoginRequest(username, password, responseListener);
RequestQueue queue = Volley.newRequestQueue(LoginActivity.this);
queue.add(loginRequest);
}
});
}
}
public class UserAreaActivity extends AppCompatActivity {
@Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_area);
final TextView etusername = (TextView) findViewById(R.id.textView2);
final TextView etwelcome = (TextView) findViewById(R.id.textView);
final ImageButton red = (ImageButton) findViewById(R.id.imageButton);
final ImageButton messages = (ImageButton) findViewById(R.id.imageButton2);
final ImageButton blue = (ImageButton) findViewById(R.id.imageButton3);
final ImageButton ping = (ImageButton) findViewById(R.id.imageButton4);
final TextView etuname = (TextView) findViewById(R.id.textView3);
final Button Logout = (Button) findViewById(R.id.logout);
//String Name = SharedPreferenceUtils.getName(this);
//etwelcome.setText(Name);
red.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent registerIntent = new Intent(UserAreaActivity.this, Report.class);
UserAreaActivity.this.startActivity(registerIntent);
}
});
messages.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent registerIntent = new Intent(UserAreaActivity.this, Messages.class);
UserAreaActivity.this.startActivity(registerIntent);
}
});
Logout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
boolean isClear = SharedPreferenceUtils.clearSP(UserAreaActivity.this);
if(isClear){
Intent registerIntent = new Intent(UserAreaActivity.this, LoginActivity.class);
UserAreaActivity.this.startActivity(registerIntent);
}
}
});
Intent intent = getIntent();
String name = intent.getStringExtra("name");
String username = intent.getStringExtra("username");
String message = "Welcome " + name;
etwelcome.setText(message);
etusername.setText(username);
//Intent in = new Intent(getApplicationContext(), Messages.class);
//in.putExtra("username", username);
//UserAreaActivity.this.startActivity(in);
}
}