1
当我在我的移动应用程序上测试我的登录时，editor.clear();不起作用，我猜是因为无论何时我注销并单击登录时没有任何用户名和密码值，它仍然会登录到以前你们能帮我解决我的问题吗？这是我的代码。Android sharedpreference注销不清除值
public class loginFragment extends Fragment implements CompoundButton.OnCheckedChangeListener {
final String TAG = this.getClass().getName();
Button btnLogin;
EditText etUsername, etPassword;
TextView tvRegister;
CheckBox cbRemember;
SharedPreferences pref;
SharedPreferences.Editor editor;
boolean checkFlag;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_login, container, false);
etUsername = (EditText) v.findViewById(R.id.etFirstname);
etPassword = (EditText) v.findViewById(R.id.etPassword);
btnLogin = (Button) v.findViewById(R.id.btnLogin);
tvRegister = (TextView) v.findViewById(R.id.tvRegister);
cbRemember = (CheckBox) v.findViewById(R.id.cbRemember);
cbRemember.setOnCheckedChangeListener(this);
checkFlag = cbRemember.isChecked();
etUsername.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, etUsername.getText().toString());
}
});
pref = getActivity().getSharedPreferences("Login.conf", Context.MODE_PRIVATE);
editor = pref.edit();
final String username = pref.getString("username", "");
final String password = pref.getString("password", "");
HashMap postData = new HashMap();
postData.put("username", username);
postData.put("password", password);
if (!username.equals("") && (!password.equals(""))) {
PostResponseAsyncTask task1 = new PostResponseAsyncTask(getActivity(), postData,
new AsyncResponse() {
@Override
public void processFinish(String s) {
if (s.contains("renter")) {
Log.d(TAG, s);
Toast.makeText(getActivity(), "Renter Login Successful!", Toast.LENGTH_SHORT).show();
Intent in = new Intent(getActivity(), RenterTabs.class);
startActivity(in);
getActivity().finish();
} else if (s.contains("owner")) {
Log.d(TAG, s);
Toast.makeText(getActivity(), "Owner Login Successful!", Toast.LENGTH_SHORT).show();
Intent in = new Intent(getActivity(), OwnerTabs.class);
startActivity(in);
getActivity().finish();
} else {
Toast.makeText(getActivity(), "Wrong username or password...", Toast.LENGTH_SHORT).show();
}
}
});
task1.execute("http://carkila.esy.es/carkila/authenticate.php");
}
btnLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
HashMap postData = new HashMap();
postData.put("username", etUsername.getText().toString());
postData.put("password", MD5.encrypt(etPassword.getText().toString()));
PostResponseAsyncTask task1 = new PostResponseAsyncTask(getActivity(), postData,
new AsyncResponse() {
@Override
public void processFinish(String s) {
Log.d(TAG,s);
if (s.contains("renter")) {
if (checkFlag) {
editor.putString("username", etUsername.getText().toString());
editor.putString("password", MD5.encrypt(etPassword.getText().toString()));
editor.apply();
Log.d(TAG, pref.getString("password", ""));
}
Intent in = new Intent(getActivity(), RenterTabs.class);
startActivity(in);
getActivity().finish();
} else if (s.contains("owner")) {
if (checkFlag) {
editor.putString("username", etUsername.getText().toString());
editor.putString("password", MD5.encrypt(etPassword.getText().toString()));
editor.apply();
}
editor.putString("username", etUsername.getText().toString());
editor.putString("password", MD5.encrypt(etPassword.getText().toString()));
editor.apply();
Intent in = new Intent(getActivity(), OwnerTabs.class);
startActivity(in);
getActivity().finish();
} else {
Toast.makeText(getActivity(), "Wrong username or password...", Toast.LENGTH_SHORT).show();
}
}
});
task1.execute("http://carkila.esy.es/carkila/authenticate.php");
}
});
tvRegister.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent in = new Intent(getActivity(), RegisterActivity.class);
startActivity(in);
}
});
return v;
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
checkFlag = isChecked;
Log.d(TAG, "checkflag: " + checkFlag);
}
}
类具有注销
public class OwnerTabs extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
SharedPreferences pref;
SharedPreferences.Editor editor;
FloatingActionButton fab;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_owner_tabs);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
pref = getSharedPreferences("Login.conf", Context.MODE_PRIVATE);
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setOffscreenPageLimit(2);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent in = new Intent(OwnerTabs.this, InsertActivity.class);
startActivity(in);
}
});
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
switch (position){
case 0:
fab.show();
break;
default:
fab.hide();
break;
}
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main,menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.action_logout){
editor = pref.edit();
editor.clear();
editor.commit();
Intent in = new Intent (getApplicationContext(), MainActivity.class);
startActivity(in);
finish();
}
return super.onOptionsItemSelected(item);
}
<?php
require 'database-config.php';
session_destroy();
$username = "";
$password = "";
if(isset($_POST['username'])){
$username = $_POST['username'];
}
if (isset($_POST['password'])) {
$password = $_POST['password'];
}
$q = 'SELECT * FROM tbl_user WHERE username=:username AND password=:password';
$query = $dbh->prepare($q);
$query->execute(array(':username' => $username, ':password' => $password));
if($query->rowCount() == 0){
header('Location: Login.php?err=1');
}else{
$row = $query->fetch(PDO::FETCH_ASSOC);
$_POST['sess_user_id'] = $row['userID'];
$_POST['sess_userrole'] = $row['roles'];
if($_POST['sess_userrole'] == "renter"){
echo "renter";
}else if ($_POST['sess_userrole'] == "owner"){
echo "owner";
}
}
?>
<?php
$database = '****';
$host = '****';
$user = '****';
$pass = '****';
$dbh = new PDO("mysql:dbname={$database};host={$host}", $user, $pass);
try{
if(!$dbh){
echo "unable to connect to database";
}
}catch (PDOException $e){
echo $e->getMessage();
}
?>
之后拨打
editor.commit();清除编辑器后，您没有应用或处理更改。 –哎呀，编辑过。它应该在课堂上用注销的按钮。 Sry基因。 @MohammedAtif – Jengjeng
您是否尝试添加断点以查看这种情况是否属实？在你的代码中？ if（id == R.id.action_logout）{编辑= pref.edit（）; editor.clear（）; editor.commit（）; Intent in = new Intent（getApplicationContext（），MainActivity.class）; startActivity（in）; finish（）; } – Seelass