在 Android 中尝试登录失败时应用程序崩溃

Question

First of all, I'm a newcomer to android development. I'm trying to develop an app that will login into a specific site and parse a XML file as a response from the site. I've written the code and its working only in successful login but the app crashes when login in unsuccessful (incorrect username/password). I also used AsyncTask but still no luck. Check the code for more info,

@Override
    public void onClick(View view) {
        if (view == ok) {
            new AttemptLogin().execute();
        }
    }

class AttemptLogin extends AsyncTask<String, String, String> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(MainActivity.this);
            pDialog.setMessage("Attempting Login...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        @Override
        protected String doInBackground(String... arg0) {
            // TODO Auto-generated method stub
            // Create a new HttpClient and Post Header
            HttpClient httpclient = new DefaultHttpClient();

            HttpPost httppost = new HttpPost(
                    "http://...");

            try {
                // Add user name, password & pin
                String action = "login";

                EditText uname = (EditText) findViewById(R.id.etUsername);
                String username = uname.getText().toString();

                EditText pword = (EditText) findViewById(R.id.etPassword);
                String password = pword.getText().toString();

                EditText pcode = (EditText) findViewById(R.id.etPin);
                String pin = pcode.getText().toString();

                List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
                        4);
                nameValuePairs.add(new BasicNameValuePair("action", action));
                nameValuePairs
                        .add(new BasicNameValuePair("username", username));
                nameValuePairs
                        .add(new BasicNameValuePair("password", password));
                nameValuePairs.add(new BasicNameValuePair("pin", pin));
                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

                // Execute HTTP Post Request
                HttpResponse response = httpclient.execute(httppost);

                responseXML = httpclient.execute(httppost,
                        new BasicResponseHandler());
                // passing xml data to dom parser 
                dom_parser();

            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }

        protected void onPostExecute(String file_url) {
            // dismiss the dialog once executed
            pDialog.dismiss();
            if (ack.equals("SUCCESS")) {

                Toast.makeText(MainActivity.this, msg, Toast.LENGTH_LONG).show();

                Intent as = new Intent(MainActivity.this, AccountSummary.class);
                // add user data
                SharedPreferences sp = PreferenceManager
                        .getDefaultSharedPreferences(MainActivity.this);
                Editor edit = sp.edit();
                edit.putString("username", username);
                edit.putString("ewallpoints", ewallpoints);
                edit.putString("name", name);
                edit.commit();

                startActivity(as);
                as.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                finish();


            }

            else {
                //setting an error message in the TextBox
                response_xml.setText("Incorrect Login!");

            }

        }
    }
} 


           public void dom_parser() {
    try {

        // File stocks = new File(responseXML);
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory
                .newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(new InputSource(new StringReader(
                responseXML)));
        doc.getDocumentElement().normalize();

        NodeList nodes = doc.getElementsByTagName("member");

        for (int i = 0; i < nodes.getLength(); i++) {
            Node node = nodes.item(i);

            if (node.getNodeType() == Node.ELEMENT_NODE) {
                Element element = (Element) node;

                ack = ((getValue("ack", element)));
                id = ((getValue("id", element)));
                username = ((getValue("username", element)));
                name = ((getValue("name", element)));
                ewallpoints = ((getValue("ewallpoints", element)));
                msg = ((getValue("msg", element)));
            }
        }
    } catch (Exception ex) {
        ex.printStackTrace();
        response_xml.setText("error!");
    }

}

private static String getValue(String tag, Element element) {
    NodeList nodes = element.getElementsByTagName(tag).item(0)
            .getChildNodes();
    Node node = (Node) nodes.item(0);
    return node.getNodeValue();
}

Here 'ack' is the success/failure message which was parsed from the xml output!

<login>
<member>
<id/>
<username/>
<name/>
<ewallpoints/>
<ack>FAILED</ack>
<msg>Wrong Username and Password</msg>
</member>
</login>

here is the logcat output,

06-18 11:13:18.216: I/ActivityManager(294): Start proc com.p2r.mobifin for activity com.p2r.mobifin/.MainActivity: pid=17984 uid=10050 gids={50050, 3003, 1028}
06-18 11:13:18.526: E/SurfaceFlinger(36): ro.sf.lcd_density must be defined as a build property
06-18 11:13:18.656: E/Trace(17984): error opening trace file: No such file or directory (2)
06-18 11:13:19.406: D/dalvikvm(17984): GC_FOR_ALLOC freed 57K, 7% free 2499K/2676K, paused 56ms, total 58ms
06-18 11:13:19.436: I/dalvikvm-heap(17984): Grow heap (frag case) to 5.802MB for 3404596-byte allocation
06-18 11:13:19.546: D/dalvikvm(17984): GC_FOR_ALLOC freed 2K, 4% free 5821K/6004K, paused 109ms, total 109ms
06-18 11:13:19.596: D/dalvikvm(17984): GC_CONCURRENT freed <1K, 4% free 5821K/6004K, paused 4ms+17ms, total 55ms
06-18 11:13:19.766: E/ActivityThread(434): Failed to find provider info for com.android.inputmethod.latin.dictionarypack
06-18 11:13:19.766: E/BinaryDictionaryGetter(434): Could not find a dictionary pack
06-18 11:13:19.906: E/SurfaceFlinger(36): ro.sf.lcd_density must be defined as a build property
06-18 11:13:20.016: D/gralloc_goldfish(17984): Emulator without GPU emulation detected.
06-18 11:13:20.105: I/ActivityManager(294): Displayed com.p2r.mobifin/.MainActivity: +1s947ms
06-18 11:13:25.146: E/SurfaceFlinger(36): ro.sf.lcd_density must be defined as a build property
06-18 11:13:26.866: E/SurfaceFlinger(36): ro.sf.lcd_density must be defined as a build property
06-18 11:13:27.996: D/dalvikvm(17984): GC_CONCURRENT freed 96K, 4% free 6749K/6968K, paused 79ms+173ms, total 394ms
06-18 11:13:27.996: I/Choreographer(17984): Skipped 100 frames!  The application may be doing too much work on its main thread.
06-18 11:13:28.396: I/Choreographer(17984): Skipped 37 frames!  The application may be doing too much work on its main thread.
06-18 11:13:28.646: I/Choreographer(17984): Skipped 34 frames!  The application may be doing too much work on its main thread.
06-18 11:13:29.306: I/Choreographer(17984): Skipped 33 frames!  The application may be doing too much work on its main thread.
06-18 11:13:29.436: I/Choreographer(17984): Skipped 34 frames!  The application may be doing too much work on its main thread.
06-18 11:13:29.666: I/Choreographer(17984): Skipped 30 frames!  The application may be doing too much work on its main thread.
06-18 11:13:29.776: W/SingleClientConnManager(17984): Invalid use of SingleClientConnManager: connection still allocated.
06-18 11:13:29.776: W/SingleClientConnManager(17984): Make sure to release the connection before allocating another one.
06-18 11:13:30.145: I/Choreographer(17984): Skipped 32 frames!  The application may be doing too much work on its main thread.
06-18 11:13:30.416: I/Choreographer(17984): Skipped 37 frames!  The application may be doing too much work on its main thread.
06-18 11:13:30.826: W/System.err(17984): java.lang.NullPointerException
06-18 11:13:30.856: W/System.err(17984):    at com.p2r.mobifin.MainActivity.getValue(MainActivity.java:104)
06-18 11:13:30.856: W/System.err(17984):    at com.p2r.mobifin.MainActivity.dom_parser(MainActivity.java:86)
06-18 11:13:30.856: W/System.err(17984):    at com.p2r.mobifin.MainActivity$AttemptLogin.doInBackground(MainActivity.java:165)
06-18 11:13:30.856: W/System.err(17984):    at com.p2r.mobifin.MainActivity$AttemptLogin.doInBackground(MainActivity.java:1)
06-18 11:13:30.856: W/System.err(17984):    at android.os.AsyncTask$2.call(AsyncTask.java:287)
06-18 11:13:30.856: W/System.err(17984):    at java.util.concurrent.FutureTask.run(FutureTask.java:234)
06-18 11:13:30.856: W/System.err(17984):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
06-18 11:13:30.856: W/System.err(17984):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
06-18 11:13:30.866: W/System.err(17984):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
06-18 11:13:30.866: W/System.err(17984):    at java.lang.Thread.run(Thread.java:856)
06-18 11:13:30.916: W/dalvikvm(17984): threadid=13: thread exiting with uncaught exception (group=0x40a71930)
06-18 11:13:31.066: E/AndroidRuntime(17984): FATAL EXCEPTION: AsyncTask #3
06-18 11:13:31.066: E/AndroidRuntime(17984): java.lang.RuntimeException: An error occured while executing doInBackground()
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.os.AsyncTask$3.done(AsyncTask.java:299)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at java.util.concurrent.FutureTask.run(FutureTask.java:239)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at java.lang.Thread.run(Thread.java:856)
06-18 11:13:31.066: E/AndroidRuntime(17984): Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4746)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:823)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.view.View.requestLayout(View.java:15473)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.view.View.requestLayout(View.java:15473)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.view.View.requestLayout(View.java:15473)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.view.View.requestLayout(View.java:15473)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.widget.RelativeLayout.requestLayout(RelativeLayout.java:318)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.view.View.requestLayout(View.java:15473)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.view.View.requestLayout(View.java:15473)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.widget.TextView.checkForRelayout(TextView.java:6452)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.widget.TextView.setText(TextView.java:3696)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.widget.TextView.setText(TextView.java:3554)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.widget.TextView.setText(TextView.java:3529)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at com.p2r.mobifin.MainActivity.dom_parser(MainActivity.java:95)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at com.p2r.mobifin.MainActivity$AttemptLogin.doInBackground(MainActivity.java:165)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at com.p2r.mobifin.MainActivity$AttemptLogin.doInBackground(MainActivity.java:1)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at android.os.AsyncTask$2.call(AsyncTask.java:287)
06-18 11:13:31.066: E/AndroidRuntime(17984):    at java.util.concurrent.FutureTask.run(FutureTask.java:234)
06-18 11:13:31.066: E/AndroidRuntime(17984):    ... 4 more
06-18 11:13:31.275: W/ActivityManager(294):   Force finishing activity com.p2r.mobifin/.MainActivity
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: E/libEGL(36): called unimplemented OpenGL ES API
06-18 11:13:31.285: W/WindowManager(294): Failure taking screenshot for (246x410) to layer 21015
06-18 11:13:31.586: I/Choreographer(17984): Skipped 65 frames!  The application may be doing too much work on its main thread.
06-18 11:13:31.736: I/Choreographer(557): Skipped 44 frames!  The application may be doing too much work on its main thread.
06-18 11:13:31.856: I/Choreographer(294): Skipped 70 frames!  The application may be doing too much work on its main thread.
06-18 11:13:31.856: E/SurfaceFlinger(36): ro.sf.lcd_density must be defined as a build property
06-18 11:13:31.956: E/SurfaceFlinger(36): ro.sf.lcd_density must be defined as a build property
06-18 11:13:32.886: I/Choreographer(294): Skipped 53 frames!  The application may be doing too much work on its main thread.
06-18 11:13:33.976: E/WindowManager(17984): Activity com.p2r.mobifin.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{41063e50 V.E..... R.....ID 0,0-456,144} that was originally added here
06-18 11:13:33.976: E/WindowManager(17984): android.view.WindowLeaked: Activity com.p2r.mobifin.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{41063e50 V.E..... R.....ID 0,0-456,144} that was originally added here
06-18 11:13:33.976: E/WindowManager(17984):     at android.view.ViewRootImpl.<init>(ViewRootImpl.java:354)
06-18 11:13:33.976: E/WindowManager(17984):     at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:216)
06-18 11:13:33.976: E/WindowManager(17984):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
06-18 11:13:33.976: E/WindowManager(17984):     at android.app.Dialog.show(Dialog.java:281)
06-18 11:13:33.976: E/WindowManager(17984):     at com.p2r.mobifin.MainActivity$AttemptLogin.onPreExecute(MainActivity.java:123)
06-18 11:13:33.976: E/WindowManager(17984):     at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
06-18 11:13:33.976: E/WindowManager(17984):     at android.os.AsyncTask.execute(AsyncTask.java:534)
06-18 11:13:33.976: E/WindowManager(17984):     at com.p2r.mobifin.MainActivity.onClick(MainActivity.java:110)
06-18 11:13:33.976: E/WindowManager(17984):     at android.view.View.performClick(View.java:4204)
06-18 11:13:33.976: E/WindowManager(17984):     at android.view.View$PerformClick.run(View.java:17355)
06-18 11:13:33.976: E/WindowManager(17984):     at android.os.Handler.handleCallback(Handler.java:725)
06-18 11:13:33.976: E/WindowManager(17984):     at android.os.Handler.dispatchMessage(Handler.java:92)
06-18 11:13:33.976: E/WindowManager(17984):     at android.os.Looper.loop(Looper.java:137)
06-18 11:13:33.976: E/WindowManager(17984):     at android.app.ActivityThread.main(ActivityThread.java:5041)
06-18 11:13:33.976: E/WindowManager(17984):     at java.lang.reflect.Method.invokeNative(Native Method)
06-18 11:13:33.976: E/WindowManager(17984):     at java.lang.reflect.Method.invoke(Method.java:511)
06-18 11:13:33.976: E/WindowManager(17984):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
06-18 11:13:33.976: E/WindowManager(17984):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
06-18 11:13:33.976: E/WindowManager(17984):     at dalvik.system.NativeStart.main(Native Method)
06-18 11:13:33.976: I/Choreographer(17984): Skipped 50 frames!  The application may be doing too much work on its main thread.
06-18 11:13:59.272: D/ExchangeService(720): Received deviceId from Email app: null
06-18 11:13:59.272: D/ExchangeService(720): !!! deviceId unknown; stopping self and retrying
06-18 11:14:04.317: D/ExchangeService(720): !!! EAS ExchangeService, onCreate
06-18 11:14:04.336: D/ExchangeService(720): !!! EAS ExchangeService, onStartCommand, startingUp = false, running = false
06-18 11:14:04.345: W/ActivityManager(294): Unable to start service Intent { act=com.android.email.ACCOUNT_INTENT } U=0: not found
06-18 11:14:04.356: D/ExchangeService(720): !!! EAS ExchangeService, onStartCommand, startingUp = true, running = false
06-18 11:14:04.356: D/ExchangeService(720): !!! Email application not found; stopping self
06-18 11:14:04.366: W/ActivityManager(294): Unable to start service Intent { act=com.android.email.ACCOUNT_INTENT } U=0: not found
06-18 11:14:04.386: E/ActivityThread(720): Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d045c8 that was originally bound here
06-18 11:14:04.386: E/ActivityThread(720): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d045c8 that was originally bound here
06-18 11:14:04.386: E/ActivityThread(720):  at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969)
06-18 11:14:04.386: E/ActivityThread(720):  at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
06-18 11:14:04.386: E/ActivityThread(720):  at android.app.ContextImpl.bindService(ContextImpl.java:1418)
06-18 11:14:04.386: E/ActivityThread(720):  at android.app.ContextImpl.bindService(ContextImpl.java:1407)
06-18 11:14:04.386: E/ActivityThread(720):  at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
06-18 11:14:04.386: E/ActivityThread(720):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
06-18 11:14:04.386: E/ActivityThread(720):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145)
06-18 11:14:04.386: E/ActivityThread(720):  at com.android.emailcommon.service.AccountServiceProxy.getDeviceId(AccountServiceProxy.java:116)
06-18 11:14:04.386: E/ActivityThread(720):  at com.android.exchange.ExchangeService.getDeviceId(ExchangeService.java:1249)
06-18 11:14:04.386: E/ActivityThread(720):  at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1856)
06-18 11:14:04.386: E/ActivityThread(720):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551)
06-18 11:14:04.386: E/ActivityThread(720):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549)
06-18 11:14:04.386: E/ActivityThread(720):  at android.os.AsyncTask$2.call(AsyncTask.java:287)
06-18 11:14:04.386: E/ActivityThread(720):  at java.util.concurrent.FutureTask.run(FutureTask.java:234)
06-18 11:14:04.386: E/ActivityThread(720):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
06-18 11:14:04.386: E/ActivityThread(720):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
06-18 11:14:04.386: E/ActivityThread(720):  at java.lang.Thread.run(Thread.java:856)
06-18 11:14:04.386: E/StrictMode(720): null
06-18 11:14:04.386: E/StrictMode(720): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d045c8 that was originally bound here
06-18 11:14:04.386: E/StrictMode(720):  at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969)
06-18 11:14:04.386: E/StrictMode(720):  at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
06-18 11:14:04.386: E/StrictMode(720):  at android.app.ContextImpl.bindService(ContextImpl.java:1418)
06-18 11:14:04.386: E/StrictMode(720):  at android.app.ContextImpl.bindService(ContextImpl.java:1407)
06-18 11:14:04.386: E/StrictMode(720):  at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
06-18 11:14:04.386: E/StrictMode(720):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
06-18 11:14:04.386: E/StrictMode(720):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145)
06-18 11:14:04.386: E/StrictMode(720):  at com.android.emailcommon.service.AccountServiceProxy.getDeviceId(AccountServiceProxy.java:116)
06-18 11:14:04.386: E/StrictMode(720):  at com.android.exchange.ExchangeService.getDeviceId(ExchangeService.java:1249)
06-18 11:14:04.386: E/StrictMode(720):  at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1856)
06-18 11:14:04.386: E/StrictMode(720):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551)
06-18 11:14:04.386: E/StrictMode(720):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549)
06-18 11:14:04.386: E/StrictMode(720):  at android.os.AsyncTask$2.call(AsyncTask.java:287)
06-18 11:14:04.386: E/StrictMode(720):  at java.util.concurrent.FutureTask.run(FutureTask.java:234)
06-18 11:14:04.386: E/StrictMode(720):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
06-18 11:14:04.386: E/StrictMode(720):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
06-18 11:14:04.386: E/StrictMode(720):  at java.lang.Thread.run(Thread.java:856)
06-18 11:14:04.386: W/ActivityManager(294): Unbind failed: could not find connection for android.os.BinderProxy@412abcd0
06-18 11:14:04.406: E/ActivityThread(720): Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d0dbc8 that was originally bound here
06-18 11:14:04.406: E/ActivityThread(720): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d0dbc8 that was originally bound here
06-18 11:14:04.406: E/ActivityThread(720):  at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969)
06-18 11:14:04.406: E/ActivityThread(720):  at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
06-18 11:14:04.406: E/ActivityThread(720):  at android.app.ContextImpl.bindService(ContextImpl.java:1418)
06-18 11:14:04.406: E/ActivityThread(720):  at android.app.ContextImpl.bindService(ContextImpl.java:1407)
06-18 11:14:04.406: E/ActivityThread(720):  at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
06-18 11:14:04.406: E/ActivityThread(720):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
06-18 11:14:04.406: E/ActivityThread(720):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145)
06-18 11:14:04.406: E/ActivityThread(720):  at com.android.emailcommon.service.ServiceProxy.test(ServiceProxy.java:191)
06-18 11:14:04.406: E/ActivityThread(720):  at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1850)
06-18 11:14:04.406: E/ActivityThread(720):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551)
06-18 11:14:04.406: E/ActivityThread(720):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549)
06-18 11:14:04.406: E/ActivityThread(720):  at android.os.AsyncTask$2.call(AsyncTask.java:287)
06-18 11:14:04.406: E/ActivityThread(720):  at java.util.concurrent.FutureTask.run(FutureTask.java:234)
06-18 11:14:04.406: E/ActivityThread(720):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
06-18 11:14:04.406: E/ActivityThread(720):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
06-18 11:14:04.406: E/ActivityThread(720):  at java.lang.Thread.run(Thread.java:856)
06-18 11:14:04.406: E/StrictMode(720): null
06-18 11:14:04.406: E/StrictMode(720): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d0dbc8 that was originally bound here
06-18 11:14:04.406: E/StrictMode(720):  at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969)
06-18 11:14:04.406: E/StrictMode(720):  at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
06-18 11:14:04.406: E/StrictMode(720):  at android.app.ContextImpl.bindService(ContextImpl.java:1418)
06-18 11:14:04.406: E/StrictMode(720):  at android.app.ContextImpl.bindService(ContextImpl.java:1407)
06-18 11:14:04.406: E/StrictMode(720):  at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
06-18 11:14:04.406: E/StrictMode(720):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
06-18 11:14:04.406: E/StrictMode(720):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145)
06-18 11:14:04.406: E/StrictMode(720):  at com.android.emailcommon.service.ServiceProxy.test(ServiceProxy.java:191)
06-18 11:14:04.406: E/StrictMode(720):  at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1850)
06-18 11:14:04.406: E/StrictMode(720):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551)
06-18 11:14:04.406: E/StrictMode(720):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549)
06-18 11:14:04.406: E/StrictMode(720):  at android.os.AsyncTask$2.call(AsyncTask.java:287)
06-18 11:14:04.406: E/StrictMode(720):  at java.util.concurrent.FutureTask.run(FutureTask.java:234)
06-18 11:14:04.406: E/StrictMode(720):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
06-18 11:14:04.406: E/StrictMode(720):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
06-18 11:14:04.406: E/StrictMode(720):  at java.lang.Thread.run(Thread.java:856)
06-18 11:14:04.416: W/ActivityManager(294): Unbind failed: could not find connection for android.os.BinderProxy@413e8d38
06-18 11:14:10.936: I/Process(17984): Sending signal. PID: 17984 SIG: 9
06-18 11:14:10.956: I/ActivityManager(294): Process com.p2r.mobifin (pid 17984) has died.
06-18 11:14:11.056: W/InputMethodManagerService(294): Got RemoteException sending setActive(false) notification to pid 17984 uid 10050

Answer 1

I think you need to modify getValue() as I did below. The parameter element to that method should be a member node. Calling getElementsByTagName() will return descendents, which should be the tags you are trying to parse. Calling getChildNodes() was attempting to find the tag inside of those tags, which wouldn't exist.

Instead element.getElementsByTagName(tag).item(0) should return the node matching the tag you are trying to find.

private static String getValue(String tag, Element element) {
    Node node = element.getElementsByTagName(tag).item(0);
    return node.getNodeValue();
}

Also, please note, per the documentation for Node , getValue() may still return null for items like <username/> (from your sample xml).

https://developer.android.com/reference/org/w3c/dom/Node.html