0
我有我的項目問題。 1.我在www.kinandayu.com上有一個網絡服務器，我成功登錄www.kinandayu.com/data_signup.php 2.我想在我的應用程序中創建一個登錄系統。我有一個像下面的代碼：與登錄網絡服務器問題
package com.example.mdesigntemp;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class SignInJSON {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
public SignInJSON() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if (method == "POST") {
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} else if (method == "GET") {
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
這是signinactivity.java
package com.example.mdesigntemp;
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.ActionBar;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.Toast;
public class LoginActivity extends Activity {
ActionBar actionbar;
TextView textview;
LayoutParams layoutparams;
Button btlogin;
EditText edEmail, edPassword;
SessionManager session;
String url, success;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
getActionBar().hide();
setContentView(R.layout.login_activity);
session = new SessionManager(getApplicationContext());
Toast.makeText(getApplicationContext(),
"User Login Status: " + session.isLoggedIn(), Toast.LENGTH_LONG)
.show();
btlogin = (Button)findViewById(R.id.btlogin);
edEmail = (EditText) findViewById(R.id.edEmail);
edPassword = (EditText) findViewById(R.id.edPassword);
TextView registerScreen = (TextView) findViewById(R.id.btDaftar);
registerScreen.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(getApplicationContext(), SignupActivity.class);
startActivity(i);
finish();
}
});
btlogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//String email = edEmail.getText().toString();
//String password = edPassword.getText().toString();
//String theemail = email.replace("" , "%20");
//String thepassword = password.replace("", "%20");
url = "http://www.kinandayu.com/data_login.php" + "email="
+ edEmail.getText().toString() + "password="
+ edPassword.getText().toString();
if (edEmail.getText().toString().trim().length() > 0
&& edPassword.getText().toString().trim().length() > 0)
{
new Masuk().execute();
}
else
{
Toast.makeText(getApplicationContext(), "Field is empty!!", Toast.LENGTH_LONG).show();
}
}
});
}
public class Masuk extends AsyncTask<String, String, String>
{
ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(LoginActivity.this);
pDialog.setMessage("Please wait a moment ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... params) {
SignInJSON jParser = new SignInJSON();
JSONObject json = jParser.getJSONFromUrl(url);
try {
success = json.getString("success");
Log.e("error", "nilai sukses=" + success);
JSONArray result = json.getJSONArray("kinanday_TesDB");
if (success.equals("1")) {
for (int i = 0; i < result.length(); i++) {
JSONObject c = result.getJSONObject(i);
//String password = c.getString("password").trim();
String email = c.getString("email").trim();
session.createLoginSession(email);
Log.e("ok", " ambil data");
}
} else {
Log.e("erro", "tidak bisa ambil data 0");
}
} catch (Exception e) {
Log.e("erro", "tidak bisa ambil data 1");
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
pDialog.dismiss();
if (success.equals("1")) {
Intent in = new Intent(LoginActivity.this, MainActivity.class);
startActivity(in);
finish();
} else {
Toast.makeText(getApplicationContext(), "Incorrect Email Or Password", Toast.LENGTH_LONG).show();
}
}
}
}
這是sessionmanager.java：
package com.example.mdesigntemp;
import java.util.HashMap;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.text.LoginFilter.UsernameFilterGeneric;
@SuppressLint("CommitPrefEdits")
public class SessionManager {
// Shared Preferences
SharedPreferences pref;
// Editor for Shared preferences
Editor editor;
// Context
Context _context;
// Shared pref mode
int PRIVATE_MODE = 0;
// nama sharepreference
private static final String PREF_USERNAME = "Sesi";
// All Shared Preferences Keys
private static final String IS_LOGIN = "IsLoggedIn";
public static final String KEY_USERNAME = "username";
public static final String KEY_EMAIL = "email";
// Constructor
public SessionManager(Context context){
this._context = context;
pref = _context.getSharedPreferences(PREF_USERNAME, PRIVATE_MODE);
editor = pref.edit();
}
/**
* Create login session
* */
public void createLoginSession(String email){
// Storing login value as TRUE
editor.putBoolean(IS_LOGIN, true);
editor.putString(KEY_EMAIL, email);
editor.commit();
}
/**
* Check login method wil check user login status
* If false it will redirect user to login page
* Else won't do anything
* */
public void checkLogin(){
// Check login status
if(!this.isLoggedIn()){
Intent i = new Intent(_context, MainActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
_context.startActivity(i);
//((Activity)_context).finish();
}
}
/**
* Get stored session data
* */
public HashMap<String, String> getUserDetails(){
HashMap<String, String> user = new HashMap<String, String>();
user.put(KEY_USERNAME, pref.getString(KEY_USERNAME, null));
user.put(KEY_EMAIL, pref.getString(KEY_EMAIL, null));
return user;
}
/**
* Clear session details
* */
public void logoutUser(){
// Clearing all data from Shared Preferences
editor.clear();
editor.commit();
Intent i = new Intent(_context, MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
_context.startActivity(i);
}
public boolean isLoggedIn(){
return pref.getBoolean(IS_LOGIN, false);
}
}
問題是，當我嘗試用正確的用戶名登錄並正確的密碼，應用程序將帶我活動主要（工作）。但是當用戶名正確但密碼不正確時，它會將我帶到活動中。而當電子郵件是錯誤的應用程序將強制停止。我從這個（http://adi-hidayat.com/android-login-logout-dengan-android-mysql/）教程中獲取這段代碼，但我不知道錯誤在哪裏。任何答案對我都很有幫助。
我應該用https改變我的web服務器嗎？ –
這肯定是一個開始:)這裏是另一篇文章，講述如何製作可以從移動應用程序中使用的安全API：https://stormpath.com/blog/secure-your-rest-api-right-way –