Android :: How To Understand The Cause Of Exception Having Stacktrace
Aug 24, 2010
We have written an Android application which sends stack traces to our server, if any occur. Sometimes we get weird stack traces that seem not to be an exception from our application.
For example:
CODE:........
There is no mention of our own classes, only Android's standard classes. It's obvious that this exception takes place when scrolling of item list (ListView) occurs, but I can't even uderstand how I can fix this bug. I can't reproduce this bug.
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Aug 18, 2009
Getting a bunch of these errors logged on one of our apps... Not sure exactly whats causing it (doesn't show our app anywhere in the stacktrace)
CODE:......................
Anyone know where to start looking?
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Aug 12, 2009
My app has been pretty stable so forth, and suddenly I keep getting these crashes that kill the entire process. What do they mean and how should I deal with them? Since I dont get any usefull stacktrace I really dont know how to debug this. Below is the dump from my error log.
CODE:...................
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Dec 5, 2009
I'm trying to display a remote video (mp4 format). When I launch prepare (or prepareSync), Android is crashing (see log view after my piece of code).
I tried with emulator, ADP1 and Hero...
CODE:.........
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Jul 14, 2010
I created a sql lite database with the following columns:
static final String dbName="demoDB";
static final String tableName="Employees";
static final String colID="EmployeeID";
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE "+tableName+" ("+colID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+
colName+" TEXT, "+colAge+" Integer);");
I want to select all the records in the database like this and display them in a gridview:SQLiteDatabase db=this.getWritableDatabase();Cursor cur= db.rawQuery("Select "+colName+", "+colAge+" from "+tableName, new String [] {});String [] from=new String []{DatabaseHelper.colName,DatabaseHelper.colAge};
int [] to=new int [] {R.id.colName,R.id.colAge};
SimpleCursorAdapter sca=new SimpleCursorAdapter(this,R.layout.gridrow,c,from,to);
GridView grid=(GridView)findViewById(R.id.grid);
grid.setAdapter(sca);but i receive the following exception:java.lang.IllegalArgumentException: column '_id' does not exist.the db table does not have a column with name '_id'so what is wrong with this code
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Oct 26, 2009
I've seen posts on how, but don't understand what rooting is. Been anxiously awaiting the first VZW android phones, so am now trying to quickly immerse myself.
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Aug 17, 2009
I have an application that uses an extended Broadcast Receiver class inside the Activity. I have the extended Broadcast Receiver class as a member variable of the Activity class. But it looks like the receiver references keep changing between its construction and 'on Receive' method call. I would like to understand this better. Here are some details. public class MyEventReceiver extends Broadcast Receiver
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Nov 18, 2010
I am using a system() call in a program , that is in c library. For 1st 9 calls it returns '0'(zero) after 10th call it returns 256. I do not know what does it mean. Please anybody help me. Following is the line of code int returnValue= system("/system/bin/cat /dev/graphics/fb0 > /tmpdata/Screenshot/screenshot.bin");
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Apr 28, 2010
I am trying to create a list view which as TextView that can display html content , an WebView and other basic TextViews.I tried to extend SimpleAdapter but i struck with the problem ,I will be glad if someone can point out the mistake i am doing.
In onCreate method:
CODE:.............
And my row.xml file looks like:
CODE:.............
The error i was getting was:
CODE:..................................
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Nov 3, 2010
I did not understand the notepad sample in android.when i import this to my workspace it shows there are no projects.Its having sqlite code i want to see how this application running,Please explain it once.
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Jun 6, 2010
In order to use hotspot a rep tells me I have to sign up for $29/month fee.. it will connect up to 8 devices or so.I also see peeps tethering their ipad etc. I doubt they are paying the fee.i also hear it will soon be free with an upcoming update?
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Apr 6, 2010
Below are the only instructions i managed to find from google on how to install the android NDK, it is written as if we all run Linux and presumes we all understand what these obscure tools are. My comments and questions appear in Italics if somone who knows unix and windows would translate for google that would be great!
Android NDK Installation
Introduction:
Please read docs/OVERVIEW.TXT to understand what the Android NDK is and is not. This file gives instructions on how to properly setup your NDK.
I. Requirements:
The Android NDK currently requires a Linux, OS X or Windows host operating system. Windows users will need to install Cygwin (http://www.cygwin.com) to use it. Note that running the NDK under MSys is not supported.
You will need to have the Android SDK and its dependencies installed. The NDK cannot generate final application packages (.apk files), only the shared library files that can go into them.
IMPORTANT:
The Android NDK can only be used to target system images using the Cupcake (1.5) or later releases of the platform. This is due to subtle toolchain and ABI related changed that make it incompatible with 1.0 and 1.1 system images.
The NDK requires GNU Make 3.81 or later being available on your development system. Earlier versions of GNU Make might work but have not been tested.
You can check this by running 'make -v' from the command-line. The output should look like:
GNU Make 3.81 Copyright (C) 2006 Free Software Foundation, Inc.
...
On certain systems, GNU Make might be available through a different command like 'gmake' or 'gnumake'. For these systems, replace 'make' by the appropriate command when invoking the NDK build system as described in the documentation.
Great some strange thing called gnu make.. if your not going to tell me what it does maybe you then at least you could give me a URL to it?
The NDK also requires a Nawk or GNU Awk executable being available on your development system. Note that the original 'awk' program doesn't implement the 'match' and 'substr' functions used by the NDK build system.
Ok another tool, with 1 of 2 possible names, but not the third... and again where should i download this?
On Windows, you will need to install a recent release of Cygwin to use the NDK.
See http://www.cygwin.com for instructions.
Woohoo a URL! download took about a day because these install instructions do not specify what parts to download.
II. Preparing your installation prebuilt cross-toolchain binaries:
After installing and unarchiving the NDK, you will need to run the following
command from the root folder:
build/host-setup.sh
hello? windows dont run nothing but .exe .com or .dll, just tell me how you want me to run it..
This will test your setup and make sure the NDK can work properly.
Nothing is said about where any of these things need to be installed to (what directory)
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Jul 22, 2010
I am VERY interested in rooting my Droid Eris...but I am VERY new to it..I don't understand overclocking or whatnot or even what ROMs are in general..should I root?
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Nov 3, 2010
I just got juice defender, Juice plot and Ultimate juice as well. But I am not able to understand the settings. Any help? I know its very basic question and I did google for it...But still not getting it.
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Jul 20, 2010
People keep asking me to repeat myself on speakerphone, they tell me I sound muffled or low as opposed to other phones I have used. Is anyone else having problems with this? It's very annoying being that I use my speakerphone daily.
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Aug 12, 2010
My wife's name is Marilyn. Not Maryland. No, I don't want to send a text to the state of Maryland. Or call the state. :0)
Is there a way to "train" Android to associate a certain spoken word with a certain result?
Oh, and it can't get "U2" or "REM" right either! I have been messing around with the new voice commands (after downloading the app and widget replacement), and I figured these would be popular enough (although oddly spelled) to be configured in. It got the Beatles, though!
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Sep 2, 2010
I have a problem with a strange out of memory exception that only occurs on some devices (mostly HTC Desire). It happens there every time a user starts a certain activity (no matter how - there are two paths to that activity) and i'm really puzzled as to why (i checked for leaks and couldn't find any)...
The error is either thrown when calling setContentView or shortly after.
This is the code block that throws the error:
CODE:.........
As i said - the error is usually thrown when calling setContentView or when calling getMonthTimeStamps()
getMonthTimeStamps is a helper function which creates a list of dates available in the internal database. It creates a couple of (small objects) and returns an ArrayList.
Here is the function:
CODE:.............
I'm not claiming that my code is flawless or perfect, but i really don't understand why this error is thrown. The XML-layout doesn't contain any references to images and not very complicated (textview, spinner, tablelayout).
Here is the error log i received from one user:
CODE:.....................
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Nov 22, 2010
I think the error is from this manifest file? when i want to start this activity "SearchResultForm" i have the exception?
CODE:................
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Oct 30, 2010
I have next stuff:
CODE:..............
As i see in debug mode db.execSql proceeds w/o any exceptions, but then in this code:
CODE:.........
Is triggered by exception with message like 'There is no table with name "Preferences"'
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May 7, 2010
Why I m getting the following exception.
CODE:...................
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Sep 22, 2010
I try and open up a new activity, pointing to the market, with the following code:
CODE:......
It works fine on the device, but the Emulator throws an Exception:
CODE:....
I'm not sure if this is just an emulator thing, or whether this could replicate on a real device?
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Aug 9, 2010
I read somewhere not to exception handle when developing in Android, is that true?
If one does need to exception handle are there any logging tools for 2.1 and above?
If shouldn't exception handle, why is it not recommended to at least use the below?
try {body-code} catch (exception-classname variable-name) {handler-code}
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May 17, 2010
I am working on the task to search a location which stored in DB. After that i have to drop a pin on the corresponding location. I made a modification on Quick Search Box(QSB) to search the DB which is in my app. for that QSB performance i followed the Search Dictionary example in API Demos. when i click the search suggestion it reloads the current activity and drop the pin on it. when click the back button it shows the below exception in the Logcat. why it happens.
My Log CAT Value:
CODE:..............
What is the Activity Thread Exception in Android? Please Help.
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Aug 5, 2010
I don't know why this is generating an ArrayOutOfBoundsException! It's likely I've overlooked something because I'm so tired but if someone could tell me what is wrong I'd appreciate it. Code...
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Nov 21, 2010
I'm getting a "SAXParseException: Unexpected end of document" error when trying to parse an xml document on android. The document in question is from the google weather api, but it seems to throw the same error regardless of the xml file in question (as long as the xml is valid) so I suspect it's a problem with my approach, rather than the xml. This is being done as a learning exercise, so I've probably (hopefully) overlooked something obvious. I've run the xml through an online validator, and it comes back as being well formed. (Can't tell me if it's valid as I don't have a DTD, but I dont think I need the DTD to parse the xml). This is the code that I'm using to try and parse the file:
private void refreshForecast() URL url;
try { url = new URL( "http://192.168.1.66:8000/google4.xml");
URLConnection connection = url.openConnection();
HttpURLConnection httpConnection = (HttpURLConnection)connection;
int responseCode = httpConnection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
InputStream in = httpConnection.getInputStream();
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
// falls over here parsing the xml.Document dom = db.parse(in);
} } catch (ManyExceptions e) { ....
} A cutdown version of the xml that produces the error is:
<?xml version="1.0"?>
<xml_api_reply version="1">
<weather>
<forecast_information>
<city>Hamilton</city>
</forecast_information>
</weather>
</xml_api_reply>
The stacktrace is:
11-20 06:17:24.416: WARN/System.err(406): org.xml.sax.SAXParseException: Unexpected end of document
11-20 06:17:24.416: WARN/System.err(406): at org.apache.harmony.xml.parsers.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:131)
11-20 06:17:24.416: WARN/System.err(406): at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:110)
11-20 06:17:24.426: WARN/System.err(406): at com.dave.nzweather.WeatherApp.refreshForecast(WeatherApp.java:159)
11-20 06:17:24.426: WARN/System.err(406): at com.dave.nzweather.WeatherApp.onCreate(WeatherApp.java:100)
11-20 06:17:24.426: WARN/System.err(406): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-20 06:17:24.438: WARN/System.err(406): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
11-20 06:17:24.438: WARN/System.err(406): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-20 06:17:24.446: WARN/System.err(406): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-20 06:17:24.446: WARN/System.err(406): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-20 06:17:24.456: WARN/System.err(406): at android.os.Handler.dispatchMessage(Handler.java:99)
11-20 06:17:24.456: WARN/System.err(406): at android.os.Looper.loop(Looper.java:123)
11-20 06:17:24.456: WARN/System.err(406): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-20 06:17:24.466: WARN/System.err(406): at java.lang.reflect.Method.invokeNative(Native Method)
11-20 06:17:24.466: WARN/System.err(406): at java.lang.reflect.Method.invoke(Method.java:521)
11-20 06:17:24.466: WARN/System.err(406): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-20 06:17:24.476: WARN/System.err(406): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-20 06:17:24.476: WARN/System.err(406): at dalvik.system.NativeStart.main(Native Method)
11-20 06:17:24.486: WARN/ROGER(406): org.xml.sax.SAXParseException: Unexpected end of document
In the interest of brevity, I've not included the original xml, but it's just the standard weather xml from googles feed. I've also tried a few completely different xml files, (including the sample from http://www.ibm.com/developerworks/xml/library/x-android/) and they all give the same error. (They also all validate as well formed when I run them through an online xml validator). This makes me think that it's not a problem with the xml, but rather with how I'm trying to feed it into the parser.
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Sep 18, 2010
I am use OpenHttpConnection(URL) method to connect internet in my android application. But getting "java.io.IOException:Error Conneting".How i can avoid this. Permissions in android manifest had given.
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Apr 8, 2009
My application uses WebView to load javascript which calls into Java class (through webview javascript iterface). Can the JavaScript catch exceptions thrown from Java?
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Mar 4, 2010
I have some well-debugged XML-RPC interfaces on a site that work wonderfully from both PHP and from JAVA. Using Eclipse I am able to write Java apps using either the Redstone or Apache XML-RPC libraries quite simply. These test cases using the 2 libraries utilize JavaSE-1.6 (jre6) libraries as well as one of the 2 xml-rpc libs referenced above.
My problem is making this work on Android. I have added ADT to my Eclipse setup and easily executed the HelloWorld test using a virtual 1.6 or 2.1 Android device - no problems. Whenever I go into the Build Path in Eclipse and add the external jars for either the apache or redstone XML-RPC libs my console goes wacky with a ton of the following:
Ignoring InnerClasses attribute for an anonymous inner class that doesn't come with an associated EnclosingMethod attribute. (This class was probably produced by a broken compiler.)
If I push ahead and debug the code when it actually ships off the XML request I get an exception out of the XML library on permissions of some sort. Why does this only happen in an "Android" project. These libraries seem to have no problem running in Non-Android standard java configs. Once we proof the ability to talk to our server we can proceed down the road of actually porting our app to Android.
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Jun 12, 2010
I wanna add three layout in a TabActivity, but it was force closed when I ran it.
Here is the code:
import android.app.TabActivity;
import android.content.res.Resources;
import android.os.Bundle;
import android.widget.TabHost;
public class Test1 extends TabActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Resources res = getResources();
TabHost tabHost = getTabHost();
tabHost.addTab(tabHost.newTabSpec("egcquery").setIndicator("EGCQuery").setContent(R.layout.main1));
tabHost.addTab(tabHost.newTabSpec("PatientInfo").setIndicator("PatientInfo").setContent(R.layout.main2));
tabHost.addTab(tabHost.newTabSpec("Comp_Interp").setIndicator("Comp_Interp").setContent(R.layout.main3));}
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Sep 30, 2009
i'm andrea from androidiani.com, i'm working on a library that will help developers about managing unexpected exceptions. The library is quite simple on it's idea, but i can't grab the unexpected exception withouth the use of a "global" try catch clausole. I saw the instrumentation class but i think it can't be useful for me..
Obviously the library will be free and the webservice too.. ( unless for the applications that generates quite low traffic ) But i personally don't love the way of global try catch..
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