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我已經在android &上登錄我已經提到過它的代碼。這是寫在IIS服務器中的PHP函數文件。我將登錄成功顯示爲1，表示登錄工作。但是，登錄後我無法進行下一個活動。JSON對象的VIew項目
<?php
require("config.inc.php");
if (!empty($_POST)) {
$query = "SELECT * FROM bpusers WHERE Email= :email ";
$query_params = array(':email' => $_POST['email'] );
try {
$stmt = $db->prepare($query);
$result = $stmt->execute($query_params);
}
catch (PDOException $ex) {
$response["success"] = 0;
$response["message"] = "Database Error. Please Try Again!";
die(json_encode($response));
}
$validated_info = false;
//fetching all the rows from the query
$row = $stmt->fetch();
if ($row) {
if ($_POST['password'] === $row['Password']) {
try {
$login_ok = true;
}
catch (PDOException $ex) {
$response["success"] = 0;
$response["message"] = "Cannot register with GCM". $ex->getMessage();
die(json_encode($response));
}
}
}
if ($login_ok) {
$response["success"] = 1;
$response["message"] = "Login successful to php!";
$response["email"] = $row[Email];
//$response["phone"] = $row[Phone_No];
//$response["nic"] = $row[NIC];
die(json_encode($response));
} else {
$response["success"] = 0;
$response["message"] = "Invalid Credentials!". $ex->getMessage();;
die(json_encode($response));
}
}
?>
login.java文件。
package cdap.park;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.loopj.android.http.RequestParams;
import cdap.billpark.dbconn.JSONParser;
import android.R.string;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Login extends Activity implements View.OnClickListener {
private EditText emailField, passwordField;
private Button btnlogin;
private Button btnforgotPwd;
private ProgressDialog pDialog;
String dbemail;
String passengerID;
JSONParser jsonParser = new JSONParser();
private static final String LOGIN_URL = "http://192.168.1.4/park/passengerLogin.php";
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
public Login() {
}
RequestParams params1 = new RequestParams();
Context applicationContext;
private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
AsyncTask<Void, Void, String> createRegIdTask;
public static final String EMAIL_ID = "emailId";
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
SharedPreferences pref = getApplicationContext().getSharedPreferences( "Location", 0);
pref.edit().clear().commit();
SharedPreferences prefBook = getApplicationContext().getSharedPreferences("BookLocation", 0);
prefBook.edit().clear().commit();
btnlogin = (Button) findViewById(R.id.button);
// btnlogin.setOnClickListener(this);
btnlogin.setOnClickListener((OnClickListener) this);
applicationContext = getApplicationContext();
// getSupportActionBar().hide();
emailField = (EditText) findViewById(R.id.editTextEmail);
passwordField = (EditText) findViewById(R.id.editTextPassword);
// btnforgotPwd = (Button)findViewById(R.id.button2);
/*
* btnforgotPwd.setOnClickListener(new View.OnClickListener() {
*
* @Override public void onClick(View v) { Intent intent = new
* Intent(Login.this, ResetPassword.class); startActivity(intent); } });
*/
emailField.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
@Override
public void afterTextChanged(Editable s) {
if (emailField.getText().length() == 0) {
emailField.setError("Email Field Cannot be empty");
}
// int x = email.indexOf("@");
// int y = email.indexOf(".");
}
});
passwordField.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
String email = emailField.getText().toString();
if (!(email.matches("[a-zA-Z0-9._-][email protected][a-z]+.[a-z]+"))) {
emailField.setError("Email is incorrect");
}
}
@Override
public void afterTextChanged(Editable s) {
if (passwordField.getText().length() == 0) {
passwordField.setError("Password Cannot be empty");
}
if (passwordField.getText().length() <= 2) {
}
}
});
}
class PassengerLogin extends AsyncTask<String, String, String> {
boolean failure = false;
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Attempting login...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
private boolean isValidPassword(String pass) {
if (pass != null && pass.length() >= 2) {
return true;
}
return false;
}
@Override
protected String doInBackground(String... args) {
int success;
String email = emailField.getText().toString();
String password = passwordField.getText().toString();
String msg = "";
try {
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("password", password));
Log.d("request!", "starting");
JSONObject json = jsonParser.makeHttpRequest(LOGIN_URL, "POST", params);
//Log.d("Login attempt", json.toString());
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
dbemail = json.getString("email");
//Log.d("Login Successful!", json.toString());
Intent intent = new Intent(getApplicationContext(), Welcome.class);
// Create a bundle object
Bundle b = new Bundle();
// Inserts a String value into the mapping of this Bundle
b.putString("email", email);
b.putString("password", password);
// Add the bundle to the intent.
intent.putExtras(b);
// start the DisplayActivity
startActivity(intent);
SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", 0);
SharedPreferences.Editor editor = pref.edit();
editor.putString("email", dbemail);
editor.commit();
Log.e("email", dbemail);
Intent i = new Intent(Login.this, Welcome.class);
i.putExtra("email", dbemail);
finish();
startActivity(i);
return json.getString(TAG_MESSAGE);
} else {
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String file_url) {
pDialog.dismiss();
if (file_url != null) {
Toast.makeText(Login.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:
new PassengerLogin().execute();
break;
}
}
}
我在日誌貓中得到以下內容。
11-12 01:09:43.058: D/json string(24238): Connected successfully
11-12 01:09:43.058: D/json string(24238): {"success":1,"message":"Login successful to php!","email":"[email protected]"}
11-12 01:09:43.058: E/JSON Parser(24238): Error parsing data org.json.JSONException: Value Connected of type java.lang.String cannot be converted to JSONObject
11-12 01:09:43.088: W/dalvikvm(24238): threadid=11: thread exiting with uncaught exception (group=0x41689e18)
11-12 01:09:43.118: E/AndroidRuntime(24238): FATAL EXCEPTION: AsyncTask #1
11-12 01:09:43.118: E/AndroidRuntime(24238): Process: cdap.park, PID: 24238
11-12 01:09:43.118: E/AndroidRuntime(24238): java.lang.RuntimeException: An error occured while executing doInBackground()
11-12 01:09:43.118: E/AndroidRuntime(24238): at android.os.AsyncTask$3.done(AsyncTask.java:300)
11-12 01:09:43.118: E/AndroidRuntime(24238): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
11-12 01:09:43.118: E/AndroidRuntime(24238): at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
11-12 01:09:43.118: E/AndroidRuntime(24238): at java.util.concurrent.FutureTask.run(FutureTask.java:242)
11-12 01:09:43.118: E/AndroidRuntime(24238): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
11-12 01:09:43.118: E/AndroidRuntime(24238): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
11-12 01:09:43.118: E/AndroidRuntime(24238): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
11-12 01:09:43.118: E/AndroidRuntime(24238): at java.lang.Thread.run(Thread.java:864)
11-12 01:09:43.118: E/AndroidRuntime(24238): Caused by: java.lang.NullPointerException
11-12 01:09:43.118: E/AndroidRuntime(24238): at cdap.park.Login$PassengerLogin.doInBackground(Login.java:189)
11-12 01:09:43.118: E/AndroidRuntime(24238): at cdap.park.Login$PassengerLogin.doInBackground(Login.java:1)
11-12 01:09:43.118: E/AndroidRuntime(24238): at android.os.AsyncTask$2.call(AsyncTask.java:288)
11-12 01:09:43.118: E/AndroidRuntime(24238): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
11-12 01:09:43.118: E/AndroidRuntime(24238): ... 4 more
11-12 01:09:43.689: D/HardwareRenderer(24238): startTrimMemory(level >=TRIM_MEMORY_COMPLETE)
11-12 01:09:43.779: E/WindowManager(24238): android.view.WindowLeaked: Activity cdap.park.Login has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{41e1cb58 V.E..... R......D 0,0-684,192} that was originally added here
11-12 01:09:43.779: E/WindowManager(24238): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:393)
11-12 01:09:43.779: E/WindowManager(24238): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:248)
11-12 01:09:43.779: E/WindowManager(24238): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:95)
11-12 01:09:43.779: E/WindowManager(24238): at android.app.Dialog.show(Dialog.java:291)
11-12 01:09:43.779: E/WindowManager(24238): at cdap.park.Login$PassengerLogin.onPreExecute(Login.java:157)
11-12 01:09:43.779: E/WindowManager(24238): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
11-12 01:09:43.779: E/WindowManager(24238): at android.os.AsyncTask.execute(AsyncTask.java:535)
11-12 01:09:43.779: E/WindowManager(24238): at cdap.park.Login.onClick(Login.java:258)
11-12 01:09:43.779: E/WindowManager(24238): at android.view.View.performClick(View.java:4480)
11-12 01:09:43.779: E/WindowManager(24238): at android.view.View$PerformClick.run(View.java:18686)
11-12 01:09:43.779: E/WindowManager(24238): at android.os.Handler.handleCallback(Handler.java:733)
11-12 01:09:43.779: E/WindowManager(24238): at android.os.Handler.dispatchMessage(Handler.java:95)
11-12 01:09:43.779: E/WindowManager(24238): at android.os.Looper.loop(Looper.java:157)
11-12 01:09:43.779: E/WindowManager(24238): at android.app.ActivityThread.main(ActivityThread.java:5872)
11-12 01:09:43.779: E/WindowManager(24238): at java.lang.reflect.Method.invokeNative(Native Method)
11-12 01:09:43.779: E/WindowManager(24238): at java.lang.reflect.Method.invoke(Method.java:515)
11-12 01:09:43.779: E/WindowManager(24238): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
11-12 01:09:43.779: E/WindowManager(24238): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
11-12 01:09:43.779: E/WindowManager(24238): at dalvik.system.NativeStart.main(Native Method)