在我的应用程序中，我使用rest api来获取用户和信息的json对象。身份验证系统是Oauth2。首先要使用该应用程序，用户需要编写他们的电子邮件地址和密码。如果用户在网络上存在电子邮件和密码，他们可以成功登录并查看所有信息。现在，我使用cookiemanager来保存并传递cookie，以便在其他的api中使用它。我是非常新的处理那种情况。问题是cookie没有使用用户名和密码刷新。我想通过每次刷新coockie永远保持会话。但现在不知道我怎么能这样做。我用以下代码解释
用户提供用户名和密码的登录代码。我用了Volley Library。并且方法是POST。
public class LoginPage extends AppCompatActivity {
public static final String MyPREFERENCES = "MyPrefs";
public static final String LOGIN_URL = "url_of_my_app";
public static final String KEY_EMAIL = "username";
public static final String KEY_PASSWORD = "password";
public static final String KEY_IS_USER_LOGED_IN = "is-user-logged-in";
private String mEmail;
private String mPassword;
public static CookieManager cookieManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
//login credential
mEmail = sharedpreferences.getString(KEY_EMAIL, null);
mPassword = sharedpreferences.getString(KEY_PASSWORD, null);
if (mEmail != null && mPassword != null && sharedpreferences.getBoolean(KEY_IS_USER_LOGED_IN, false)) {
final GlobalClass globalClass = new GlobalClass();
globalClass.setEmail_info(mEmail);
Intent loginIntent = new Intent(LoginPage.this, MainOptionPage.class);
loginIntent.putExtra(KEY_EMAIL, mEmail);
startActivity(loginIntent);
finish();
} else {
});
}
}
private void attemptLogin() {
...
}
//volley library to hit the request
private void loginUser(final String mEmail, final String mPassword) {
final GlobalClass globalClass = new GlobalClass();
globalClass.setEmail_info(mEmail);
setFilePath();
this.trustAllCertificates();
cookieManager = new CookieManager(new PersistentCookieStore(getApplicationContext()), CookiePolicy.ACCEPT_ALL);
CookieHandler.setDefault(cookieManager);
RequestQueue queue = Volley.newRequestQueue(LoginPage.this);
StringRequest strReq = new StringRequest(Request.Method.POST,
LOGIN_URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Register Response: " + response.toString());
//parse your response here
if (response.contains("overview")) {
showProgress(true);
if (!globalClass.ifUserDataExist(mEmail)) {
Log.d("----After Login---", "After Login");
....
}
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putString(KEY_EMAIL, mEmail);
editor.putString(KEY_PASSWORD, mPassword);
editor.putBoolean(KEY_IS_USER_LOGED_IN, true);
editor.commit();
loginIntent.putExtra(KEY_EMAIL, mEmail);
startActivity(loginIntent);
finish();
} else {
userEmail.setError(getString(R.string.error_incorrect_login));
userEmail.requestFocus();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Log.e(TAG, "Inside getParams");
Map<String, String> params = new HashMap<>();
params.put(KEY_EMAIL, mEmail);
Log.d("email address", mEmail);
params.put(KEY_PASSWORD, mPassword);
return params;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<>();
headers.put("Content-Type", "application/x-www-form-urlencoded");
Log.d("headers", String.valueOf(headers));
return headers;
}
};
// Adding request to request queue
queue.add(strReq);
}
现在在UserActivity中，如果登录成功，我将从Rest API获取用户信息。因此我得到了这些信息。在会话过期的某个时间之后，回收者视图为空白。
我只给出了这个活动课的Volley部分。如果cookie为null，我使用了alett对话框。但实际上我不想这样做。如何永久保留登录凭证，这使我可以随时使用所有api。
public void sendRequest() {
trustAllCertificates();
CookieHandler.setDefault( cookieManager );
if (cookieManager==null) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Your session has expired");
builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//dialog.dismiss();
Intent intent = new Intent( MyColleaguesPage.this, LoginPage.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
SharedPreferences sharedPreferences = getSharedPreferences("MyPrefs", MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
//editor.remove("username");
//editor.remove("password");
editor.remove(LoginPage.KEY_IS_USER_LOGED_IN);
editor.apply();
finish();
}
});
AlertDialog alert = builder.create();
alert.show();
} else {
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest( Request.Method.GET, UPLOAD_URL + "/api/users", null, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
for (int i = 0; i < response.length(); i++) {
MyColleagueModel mycolleague = new MyColleagueModel();
try {
JSONObject object = response.getJSONObject( i );
mycolleague.setName( object.optString( "name" ) );
mycolleague.setGivenName( object.optString( "givenName" ) );
mycolleague.setCompany( object.optString( "company" ) );
mycolleague.setTitle( object.optString( "title" ) );
mycolleague.setMail( object.optString( "mail" ) );
mycolleague.setMobile( object.optString( "mobile" ) );
mycolleague.setDepartment( object.optString( "department" ) );
} catch (JSONException e) {
e.printStackTrace();
}
myColleagueList.add( mycolleague );
}
adapter = new MyColleaguesAdapter( myColleagueList, MyColleaguesPage.this );
recyclerView.setAdapter( adapter );
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.i( "Volley Error: ", error.toString() );
}
} );
rq.add( jsonArrayRequest );
}
}