知识的领域是无限的,我们的学习也是无限期的。这篇文章主要讲述在Android中登录尝试失败时app崩溃了相关的知识，希望能为你提供帮助。
首先，我是android开发的新手。我正在尝试开发一个将在特定站点登录的应用程序，并将xml文件解析为来自该站点的响应。我已经编写了代码并且只在成功登录时才起作用，但是当登录失败时（不正确的用户名/密码），应用程序崩溃了。我也使用AsyncTask但仍然没有运气。检查代码以获取更多信息，
@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://www.mysite.com/finalplus/apiservice.php");
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();
}
这里'ack'是从xml输出解析的成功/失败消息！
<
login>
<
member>
<
id/>
<
username/>
<
name/>
<
ewallpoints/>
<
ack>
FAILED<
/ack>
<
msg>
Wrong Username and Password<
/msg>
<
/member>
<
/login>
这是logcat输出，
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
答案我想你需要修改
getValue()，如下所示。该方法的参数element应该是成员节点。调用getElementsByTagName()将返回后代，后代应该是您要解析的标记。调用getChildNodes（）试图找到那些不存在的标记内的标记。相反，
element.getElementsByTagName(tag).item(0)应返回与您要查找的标记匹配的节点。private static String getValue(String tag, Element element) {
Node node = element.getElementsByTagName(tag).item(0);
return node.getNodeValue();
}
此外，请注意，根据
Node的文档，getValue（）仍然可以为<
username/>
（来自您的示例x??ml）等项目返回null。【在Android中登录尝试失败时app崩溃了】https://developer.android.com/reference/org/w3c/dom/Node.html
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