【发布时间】：2017-04-11 13:57:37
【问题描述】：
在我使用 webview 的应用程序中，登录后会显示用户数据，但一旦从应用程序注销并在 webview 中使用新用户登录。它显示旧的用户数据而不是新的。登录前已经清理了 cookie、会话和数据库，但它不起作用。
这是我的登录页面代码
public class Login_Activity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
private EditText et_username, et_password;
private List<String> categories = new ArrayList<String>();
private List<String> categoriesLink = new ArrayList<String>();
private ArrayAdapter<String> dataAdapter;
private Spinner spinner;
private ProgressDialog prDialog;
private CheckBox saveLoginCheckBox;
private SharedPreferences loginPreferences;
private SharedPreferences.Editor loginPrefsEditor;
private Boolean saveLogin;
private DatabaseHandler databaseHandler;
private String txt_username, txt_password;
private String pre_username;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
getSupportActionBar().setTitle("");
/* .. NewworkonMain ThradException error solution*/
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
databaseHandler = new DatabaseHandler(Login_Activity.this);
setcontent();
}
private void setcontent() {
et_username = (EditText) findViewById(R.id.et_username);
et_password = (EditText) findViewById(R.id.et_password);
saveLoginCheckBox = (CheckBox) findViewById(R.id.saveLoginCheckBox);
loginPreferences = getSharedPreferences("loginPrefs", MODE_PRIVATE);
loginPrefsEditor = loginPreferences.edit();
// Spinner element
spinner = (Spinner) findViewById(R.id.spinner);
// spinner.setPrompt("Service Name");
saveLogin = loginPreferences.getBoolean(AppConstant.PREF_SAVE_LOGIN, false);
if (saveLogin == true) {
et_username.setText(loginPreferences.getString(AppConstant.PREF_USER_NAME, ""));
// et_password.setText(loginPreferences.getString("password1", ""));
saveLoginCheckBox.setChecked(true);
}
// Login Button
Button btn_login = (Button) findViewById(R.id.btn_login);
btn_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Internet Connection
if (!Common.isInternetOn(Login_Activity.this)) {
Toast.makeText(Login_Activity.this, "Please check your Internet Connection", Toast.LENGTH_SHORT).show();
return;
}
// Null Value Validation
int pos = spinner.getSelectedItemPosition();
if (pos == 0 || pos == -1) {
Toast.makeText(Login_Activity.this, "Please add service name", Toast.LENGTH_SHORT).show();
return;
}
if (TextUtils.isEmpty((et_username.getText().toString().trim()))) {
Toast.makeText(Login_Activity.this, "Please add username", Toast.LENGTH_SHORT).show();
return;
}
if (TextUtils.isEmpty((et_password.getText().toString().trim()))) {
Toast.makeText(Login_Activity.this, "Please add password", Toast.LENGTH_SHORT).show();
return;
}
pre_username = et_username.getText().toString();
// String passoed1 = et_password.getText().toString();
if (saveLoginCheckBox.isChecked()) {
loginPrefsEditor.putBoolean(AppConstant.PREF_SAVE_LOGIN, true);
loginPrefsEditor.putString(AppConstant.PREF_USER_NAME, pre_username);
loginPrefsEditor.putString(AppConstant.PREF_SELECTED_SERVICE, spinner.getSelectedItem().toString());
// loginPrefsEditor.putString("password1", passoed1);
loginPrefsEditor.commit();
} else {
loginPrefsEditor.clear();
loginPrefsEditor.commit();
}
// add http logic
if (categories != null && categories.size() > 0) {
selectedPath = categoriesLink.get(pos);
if (!TextUtils.isEmpty(selectedPath)) {
if (!selectedPath.toLowerCase().contains("http"))
selectedPath = "http://" + selectedPath;
new SaveAppData().execute();
}
}
}
});
//Add Button
Button btn_add = (Button) findViewById(R.id.btn_add);
btn_add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Login_Activity.this, AddServiceName_Activity.class);
startActivityForResult(intent, 999);
}
});
checkPermission();
}
private void fillUpSpinner() {
categories.clear();
categoriesLink.clear();
List<ServiceDetails> serviceList = databaseHandler.getAllServiceList();
for (int i = 0; i < serviceList.size(); i++) {
ServiceDetails serviceDetail = serviceList.get(i);
categories.add(serviceDetail.getName());
categoriesLink.add(serviceDetail.getUrl());
}
if (categories.size() > 0) {
categories.add(0, "Select service name");
categoriesLink.add(0, "");
} else {
categories.add("Add service name");
categoriesLink.add("");
}
if (dataAdapter == null) {
dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, categories);
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
spinner.setAdapter(dataAdapter);
if (saveLogin) {
String selectedService = loginPreferences.getString("selected_service", "");
if (!TextUtils.isEmpty(selectedService)) {
int pos = categories.indexOf(selectedService);
spinner.setSelection(pos);
}
}
spinner.setOnItemSelectedListener(this);
} else {
dataAdapter.notifyDataSetChanged();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 999) {
if (resultCode == Activity.RESULT_OK) {
/* String serName = data.getStringExtra("serName");
String serUrl = data.getStringExtra("serUrl");*/
fillUpSpinner();
/*categories.clear();
categoriesLink.clear();*/
/*categories.add(0, serName);
categoriesLink.add(0, serUrl);
dataAdapter.notifyDataSetChanged();
spinner.setSelection(0);*/
} else {
if (!saveLoginCheckBox.isChecked()) {
// spinner.setSelection(0);
et_username.setText("");
et_password.setText("");
}
}
}
}
String selectedPath = null;
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
// On selecting a spinner item
// String item = parent.getItemAtPosition(position).toString();
// Showing selected spinner item
// Toast.makeText(parent.getContext(), "Selected: " + item, Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
// SaveAppData Web API Method
public class SaveAppData extends AsyncTask<String, Void, String> {
String str = "A";
@Override
protected void onPreExecute() {
super.onPreExecute();
prDialog = new ProgressDialog(Login_Activity.this);
prDialog.setMessage("Please wait ...");
prDialog.show();
}
Response responseValue;
@Override
protected String doInBackground(String... params) {
TelephonyManager telephonyManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
String device_id = telephonyManager.getDeviceId();
// String url = "http://192.168.0.122:5000/api/Login/SaveAppData?deviceID=" + device_id + "&deviceType=" + str;
if (!selectedPath.endsWith("/")) {
selectedPath = selectedPath + "/";
}
SharedPreferences sp = getApplicationContext().getSharedPreferences(AppConstant.PREF_SELECTED_PATH, 0);
SharedPreferences.Editor editor = sp.edit();
editor.putString(AppConstant.PREF_URI_SELECTEDPATH, selectedPath);
editor.commit();
String url = (selectedPath + "api/Login/SaveAppData?deviceID=" + device_id + "&deviceType=" + str);
JSONObject jsonObject = new JSONObject();
//WebAPI.PostData(url, jsonObject.toString());
responseValue = WebAPI.PostDataWithStatusCode(Login_Activity.this, url, jsonObject.toString());
return null;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
/* if(prDialog!=null){
prDialog.dismiss();
}*/
try {
if (responseValue != null) {
int code = responseValue.code();
String str = responseValue.body().string();
if (code == 200) {
parseResponseAndSaveDefaultURL(str);
new AuthenticateUser().execute();
} else {
Toast.makeText(Login_Activity.this, "Please enter valid Host Name", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(Login_Activity.this, "Please enter valid Host Name", Toast.LENGTH_SHORT).show();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
// get WebURL from SaveAppData Response
private void parseResponseAndSaveDefaultURL(String str) {
try {
String res = str;
JSONArray jsonArray = new JSONArray(res);
JSONObject jsonObject = jsonArray.getJSONObject(1);
String url = jsonObject.getString("value");
if (!TextUtils.isEmpty(url)) {
SharedPreferences pref_token = PreferenceManager.getDefaultSharedPreferences(Login_Activity.this);
SharedPreferences.Editor editor = pref_token.edit();
editor.putString(AppConstant.PREF_RESPONCE_DEFAULT_URL, url);
editor.commit();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
// AuthenticateUser Web API Method
public class AuthenticateUser extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
/* prDialog = new ProgressDialog(Login_Activity.this);
prDialog.setMessage("Please wait ...");
prDialog.show();*/
txt_username = et_username.getText().toString();
txt_password = et_password.getText().toString();
}
Response responseValue;
@Override
protected String doInBackground(String... params) {
TelephonyManager telephonyManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
String device_id = telephonyManager.getDeviceId();
try {
JSONObject jsonObject = new JSONObject();
jsonObject.put("username", txt_username);
jsonObject.put("password", txt_password);
jsonObject.put("deviceID", device_id);
/*String response = WebAPI.PostData("http://192.168.0.122:5000//api/Login/AuthenticateUser", jsonObject.toString());*/
if (!selectedPath.endsWith("/")) {
selectedPath = selectedPath + "/";
}
// String response = WebAPI.PostData(Login_Activity.this,selectedPath+"api/Login/AuthenticateUser",jsonObject.toString());
responseValue = WebAPI.PostDataWithStatusCode(Login_Activity.this, selectedPath + "api/Login/AuthenticateUser", jsonObject.toString());
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
if (prDialog != null) {
prDialog.dismiss();
}
try {
if (responseValue != null) {
int code = responseValue.code();
String str = responseValue.body().string();
if (code == 200) {
CookieSyncManager.createInstance(Login_Activity.this);
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.removeAllCookie();
cookieManager.removeSessionCookie();
cookieManager.setAcceptCookie(false);
clearCacheFromWebView();
WebViewDatabase.getInstance(Login_Activity.this).clearHttpAuthUsernamePassword();
WebViewDatabase.getInstance(Login_Activity.this).clearUsernamePassword();
WebViewDatabase.getInstance(Login_Activity.this).clearFormData();
deleteDatabase("webview.db");
deleteDatabase("webviewCache,db");
Intent intent = new Intent(Login_Activity.this, Home_Activity.class);
startActivity(intent);
finish();
SharedPreferences pref_token = PreferenceManager.getDefaultSharedPreferences(Login_Activity.this);
SharedPreferences.Editor editor = pref_token.edit();
editor.putString(AppConstant.PREF_RESPONCE_TOKEN, str);
editor.commit();
} else {
Toast.makeText(Login_Activity.this, "Please enter valid username or password", Toast.LENGTH_SHORT).show();
}
}
} catch (IOException e) {
e.printStackTrace();
}
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(Login_Activity.this);
SharedPreferences.Editor editor = pref.edit();
editor.putString(AppConstant.PREF_USER_NAME, txt_username);
editor.putString(AppConstant.PREF_PASSWORD, txt_password);
editor.commit();
}
}
【问题讨论】：