Android :: MyException Which Shows Toast Causes Trouble While Thrown In Threads - How Should Reorganize Exception Handling?
Oct 4, 2010
I have written my own Exception (MyException) and implemented Logging and showing Error Messages in Form of Toasts. Here is the shortform of it...
CODE:............
Everything was fine until I now implemented Threads where Exceptions are being thrown and caught.
You probably already have seen, that I played with the Looper Class, but honestly I don't know how to make it work. Is that the right approach? You also can see that I already store a reference of the ApplicationContext in my Controller. Shall I do it with the ActivityContext as well and than make the Toast from this ActivityContext? (But I heard that this is not a good practice in terms of performance)
Update
Is this the way I should go, when an Exception is being caught in a Thread in an Activ ity?
CODE:...........................
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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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Aug 18, 2009
AsyncTask blocks exceptions? Please see the below code. My "getOffersStatus" function catches certain exceptions and show them in a AlertDialog. But instead of getting my custom exceptions message I get default error dialog "The application ... has stopped unexpectdly. Please try again".
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Nov 24, 2010
I'm developing a media file app that is meant to play sounds stored in my raw folder. There are about 32 sounds in all. And this is what i'm doing on the click of each button:
CODE:.......
I get a runtime exception saying "app stops unexpectedly" with the follow messages in my logcat window:
CODE:................
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Sep 3, 2010
Have a dump_log which points to "Out of Memory exception". How do I fix the issue as we have a number of applications running on the Android target?
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Oct 11, 2010
I'm trying to run this piece of code inside my onCreate method as an initial test into writing private data for my app to use. This code is straight out of the Android SDK development guide located here (http://developer.android.com/guide/topics/data/data-storage.html#filesInternal)
CODE:................
However, this code give me errors for the 3 lines of code at the bottom. The error is an unhanded exception. The suggested quick fix is do to the following:
CODE:..........
But after doing that I get an error for the bottom two lines which states that fos may not be uninitialized. How can I fix this code? It's kind of annoying that the Android SDK gives you an example that doesn't even work.
I can't say I'm an expert at exception handling either.
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Jun 22, 2010
I'm trying to catch a login exception thrown by the class that readerAccount belongs to in the code below.
CODE:......................
However, the only part of the catch statement that happens is is the Log.w() function. I was under the impression that during a catch statement, you have the opportunity to recover from errors, but the program blacks out the screen altogether and the dialog is not displayed, nor is the Toast.
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Aug 13, 2010
I am using AsyncTask in my application.
The problem is that when server is down the AsyncTask throws an Interrupted exception. How to track that whether server is down or not.
CODE:.........
This same problem also occurs when the handset is kept idle for some time then keyguard gets lock and I suppose that WI-FI also gets disabled. So, when I enable the keyguard and if my application is in foreground then it gives the same exception. What should I do in order to remove this exception?
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Sep 16, 2010
This is the sequence part of this question: http://stackoverflow.com/questions/3674441/combining-2-images-overlayed
so the problem is: if the image size is too big - it'll got an exception (out of memory exception)
what i want is, to handle even if the handset got the lower spec hardware, it doesn't go to that exception (but it'll take a longer time to process the image) is it possible to do that?
The code snippet is like this:
CODE:......
And that block of code is inside the async task.
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Sep 4, 2010
I have class A in which I have a method openfileConnec().
It was written like the below:
CODE:...............
Now I come to class B where I will call this method like the below:
CODE:.............
I was asked a question in an interview as follows:
Why does the method have a throws Exception in its declaration? Is it that on of the methods called in the implementation throws the base class exception? Also If we get a exception during calling the method (fileConnect( )) control goes to catch block. After executing catch where should the control go, what should be sent to base case?
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Aug 14, 2010
We are converting out suite of iPhone apps written in .NEt MonoTouch to Android.
How do we catch, then publish exceptions so that they are reported via the Android Market?
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Jul 10, 2010
I am trying to make APP native code for Android. The Native code is in cplusplus. Whenever I try to make, the following error appears.
H236Plus.cpp:135: error: exception handling disabled, use -fexceptions to enable
How do I use -fexceptions to enable exception handling, and where do I use it?
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Feb 8, 2010
When using setDuration for a Toast is it possible to set a custom length or at least something longer than Toast.LENGTH_LONG?
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Dec 29, 2009
I want to alphabetize them, but there doesn't seem a way to move them in the bookmark list. Thanks!
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Apr 13, 2010
What are the advantages/disadvantages in placing a lengthy network access code in a thread in an activity or a thread in a service? How would it affect the application? I am writing a streaming audio player and from what I've read so far putting the code in a service will still end up blocking the application so a new thread is needed, does anyone know if it makes more sense to put this piece of code in a service.
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Jun 4, 2010
Anyone know how to remove or reorganize the widget for favorites?
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Jul 28, 2010
In my application, sometimes the following exception is thrown:
CODE:..........
It's difficult to find the error, because in the stacktrace none of my methods is listed. So, does anyone know when this exception is thrown?
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Oct 9, 2010
I'm using a lazy image loader for my ListView with the following code inside getView():
CODE:.........
And the following inside the AsyncImageLoader class:
CODE:........
For an unknown reason to me, after to switched from using the common SQLiteOpenHelper to a custom one which allows me to store my database on the SD card, every 6th or 7th image that is loaded throws a NullPointer at:
imageCallback.imageLoaded((Bitmap) message.obj, wallpaperNumber);
I've checked everything and don't actually know what variable is actually null.
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Sep 12, 2009
I have the following issue i have an application that uses android.media.MediaPlayer and got this exception:
CODE:.......
In the documentation there are no invalid states for the reset method. From the stack trace it seems that the exception is thrown by the native call. i read about some issues about the same problem but this time for setDataSource method and the solution is the surround with try catch http://code.google.com/p/android/issues/detail?id=957.
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Sep 7, 2010
I am writing an android application for sending email which launches the default mail application of android and asks to allow sending mail or not.
I want to know the type of Exceptions that are expected to throw in this case.
I have gone through Developer guide and some other Android PDFs ,I am finding only base class Exception.
I want to know are there ant other exceptions that will be thrown other that exception, which we need to handle in our program.
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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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Apr 19, 2009
Detail Descriptioin: 1. When I use the same code to access "http://www.google.com", it works. 2. When I use the same code to access "https://www.google.com", it doesn't work and will throw IllegalArgumentException..............
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Oct 7, 2010
When using this class I get this strange exception. It is used to print out a nice timer display for my game, and is created when my main GameView class is created. The error gets thrown at line 26: super(s*1000,1000);
package tommedley.android.game;
import android.content.Context;
import android.graphics.Canvas;...
public static int MODE_COUNTING = 0;
public static int MODE_PAUSED = 1;
public static int MODE_FINISHED = 2;...
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May 5, 2010
I love the fact that I can type words like "im" and it predicts into "I'm". Is it an all or nothing though because I'm continually getting odd words thrown into my texts and not catching it. Mostly happens with slang usage or proper names. Is the only trick to keep entering these things into the personal dictionary until you root out the majority of mishaps or is there a better way. Almost wish there was a list of usual suspects that it'd auto fix but that it'd leave alone proper name entries and abbreviations and so forth. Wishful thinking or possible?
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Jul 26, 2010
On the applications screen, (the one which you drag up from the bottom of the home screen), is there any way to create folders there and re-organise the position of apps? I know that you can create folders on the home screens, but this isn't what I want to do. I would love to be able to create a folder that I can dump all of the programs I will never use but which Sony will not allow me to delete, (you know the ones - moxier etc!!)
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Sep 2, 2010
Android device is much slower and have much lower memory compare to PC/server, So what is the best way to handling XML in Android? And I have a set of very complex xml needed to parse. both SAX or DOM will cause too much code. Anybody have good suggestion? I want to make it clean and fast.
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Sep 11, 2010
By the above code i am able to get the Toast. Instead of Toast I want the Dialog to be appear after the alarm is set. Also I want to play the sound.
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Jan 11, 2010
I have a service that runs in the background. I´d like to be able to show a message to the user when there is an incomming call. Atm i´m using a Toast, because as far as I know it is the only way to display something regardless of the current activity the user is running. But I have seen apps that can show entire views on top of others activities. How can this be done?
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Apr 6, 2010
I'm using a PostMethod, and wondering what try/except handling I should use.
The exception handling here seems to work okay in most scenarios, but is there anything I might be missing? In particular, I'm wondering whether this handles the network connection going down midway through the upload.
CODE:...................
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Jan 1, 2010
I've been wondering if Handcent is supposed to move all my pictures to the top of each thread? And is there anyway to save the pictures with Handcent?
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