Android :: Problem Running Android HelloTabWidget Example - NullPointerException On AddTab
Feb 21, 2010
I've tried the Tab Layout example, and I've also fixed the few typos in the example (and added all the activities to the manifest). However, when I run it on the emulator I get a NullPointerException on the first line that says
tabHost.addTab(spec);
So my question, of course, is. What is wrong with the example that would cause this exception? I'm using Eclipse Galileo and set the target package as Android 1.5. So far I've had no other problems with the other examples on the android dev site.
CODE:................
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Aug 31, 2010
When I view the following xml file in the layout view (eclispse), I got NullPointerException:null message, but when I run the code, it works.
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Nov 15, 2010
This does not refer to anywhere in my code at all.
How do I go about getting to the bottom of it?
CODE:..........................
Here is the draw method of the ItemizedOverlay
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I now print out the stacktrace and no difference!
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Oct 15, 2010
I am (supposedly) catching NullPointerException and returning 0 if that happens. But occasionally I get NullPointerException failure anyway. Is catching it this way no enough to prevent this failure?
private char getCharBehindCursor (int offset){ // get a single char behind cursor + offsett CharSequence cSeq; InputConnection inputConnection = getCurrentInputConnection(); if (inputConnection != null){ try { cSeq = inputConnection.getTextBeforeCursor (offset + 1, 0); } catch (NullPointerException npe) { /* failure*/ return (char)0; }
if (cSeq.length() == offset+1){ return cSeq.charAt(0); } } return (char)0;
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Jul 28, 2010
i get NullPointerException at the start of the for where am i going wrong?
public void checkzone(Location loc)
{
X = new List<float[]>() {
};
Y = new List<float[]>() {
};
X.clear();
Y.clear();
float x = (float) loc.getLatitude();
float y = (float) loc.getLongitude();
float A1X[] = {(float) 41.992853, (float) 41.994815, (float) 41.995158, (float) 41.993065};//DOMA..........................
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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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Jun 23, 2010
I am trying to save the date of file parsing, so that when next time user, opens the application, the date can be checked against the last parsing date. I am using shared preference to save the data and retrieve it, but getting error. here is the code:
SharedPreferences settings = getPreferences(0);
String today = new Date(System.currentTimeMillis()).toString();
SharedPreferences.Editor edit = settings.edit();
System.out.println("******** Today : " + today);
edit.putString("lastdate", today);
String fetch = settings.getString("lastdate", "0");
System.out.println("******** Fetch : " + fetch);
txtTest.setText(fetch);
but I am getting null pointer error. am I missing something?
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Oct 12, 2009
I'm trying to use NinePatchDrawables in a LayerDrawable, but for some reason I get a NullPointerException. I've isolated the problem to the getPadding() method; the following code reproduces the problem:
CODE:...............
What am I missing? Do I have to do anything special with the NinePatch? The program seems to work if I use the NinePatch directly (instead of putting it in a LayerDrawable).
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Oct 3, 2010
This is the code for my custom provider, mostly copied from the SDK notepad project i cant understand why am i getting nullPointException, why doesnt the provider instance get created?
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LogCat
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Mar 8, 2010
I'm trying to change the content of a row in ListView programmatically. In one row there are 3 TextView and a ProgressBar. I want to animate the ProgressBar if the 'result' column of the current row is zero.
After reading some tutorials and docs, I came to the conclusion that LayoutInflater has to be used and getView() - overriden. Maybe I am wrong on this. code...
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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:
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The error i was getting was:
CODE:..................................
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Jun 12, 2009
I created a custom SurfaceView called CaptureView and tried to add it into main.xml file.The application seems to work fine but if I switch from main.xml tab to Layout in Eclipse the text NullPointerException appears instead of layout preview.Does anyone know how this issue could be solved?
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Jun 28, 2010
I am using Eclipse 3.6.0, when I try to edit the strings.xml the Eclipse show me NullPointerException.
Any solution or advice how to handle this?
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Jun 30, 2010
I have looked and looked, and cant seem to get to the bottom of this.
I am getting the error: "java.lang.NullPointerException"
whenever I try to change anything at all within "strings.xml" when using eclipse, does anyone know of a reason behind this? I havnt changed anything else in the project at all, I'm just going straight into strings to try editting a few things.
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Jun 28, 2010
it has taken more than i expected to get the dev environment up and running - mostly a PATH issue which was solved using: http://groups.google.com/group/android-developers/browse_thread/threa...
My emulator now works (and i can run it and get the default android screen) however when i try to run the hello world sample code i get this error message:
An internal error occurred during: "Launching HelloAndroid". java.lang.NullPointerException
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Oct 20, 2010
I'm getting this crazy error on multiple projects, even when I revert back to prior versions that compiled just fine. Unknown Error - java.lang.NullPointerException Android Packaging Problem Path is blank Location is Unknown. 1 - Project -> Clean -> All 2 - Deleting .metadata folder 3 - reimporting projects into the eclipse 4 - reverting my projects back to prior working versions using git. I just can't get anything to compile now, and I've searched for solutions here and on eclipse forums.
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Jul 22, 2009
I have one Activity, that starts one Service and my service will lunch one Activity, i wanna to stop the Activity which one started my my Service after few seconds. Is there any way to achieve. Has anyone experienced this type of scenario.
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Oct 6, 2010
I have a Service Receiver and a phone state listener class to determine the status of the phone. When the state is "CALL_STATE_RINGING", I call upon the method stopAllPlayback() in my main Activity. It is at this point that users report "Forced Close" messages. Can you help me determine where the problem might be? I'm new to Java so I'm not 100% sure how to troubleshoot based on a stack trace.
Here's the stack trace:...............
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Aug 23, 2010
Thread [<1> main] (Suspended (exception NullPointerException)) ArrayAdapter.createViewFromResource(int, View, ViewGroup, int) line: 355 ArrayAdapter.getView(int, View, ViewGroup) line: 323 ListView(AbsListView).obtainView(int, boolean[]) line: 1294 ListView.measureHeightOfChildren(int, int, int, int, int) line: 1198 My symptomremedyActivity.java looks like:................
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Jul 18, 2010
Im trying to display this listview, but I keep getting a: 07-17 21:14:22.233: ERROR/AndroidRuntime(349): java.lang.NullPointerException
I think I know what the problem is but I dont know how to fix it.
I have a String array which I will be using to be displayed in my list
CODE:.....
Dont worry the parser works great. the only problem I see with it is that the parser doesnt know how many strings the website will have so I am setting the String array in the parser to be very big: String substr[] = new String[250];
But I know that mostly there are only like 11 to 13 values that I will be storing in that array, the problem I think is when i do this:
CODE:..............
Since the String array is set to have up to 250 values in it and I only actually store say 12 then there are a null entries so when I run the code it shows me my list view, but when I get to the bottom of the view it force closes and the log tells me that there was nullpointer. I can tell how many entries I collected while I am parsing, but how do I tell my listview to only show say 12 items in the list so there wont be any null entries. or is there any other solution for my problem.
I tried doing what you said, but now I am getting a:
CODE:......
This is what I did:
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Sep 9, 2010
i am getting this error java.lang.NullPointerException at android.content.ContextWrapper.getPackageManager when am trying to get list of all installed applications on the device. Well let me explain what my program is doing. I have a server that starts when my application is started, and the client pings the server and asks to get a list of installed applications. The Server then asks the getPackageManager() and gets all the installed applications. But the getPackageManager returns the nullpointerexception. The Server is written in a java environment and is started from my android application. Could someone please tell me what am missing and why i am getting this error? hanks alot!!!Please find the code...
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Jun 8, 2010
I cannot for the life of me figure out why I'm getting a NullPointerException.
When a user clicks on a particular image, a dialog window is supposed to pop-up and display a larger version of said image:
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The associated onCreateDialog looks like this:
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For reference, this is cover_dialog.xml:
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Now, when the image previously described is clicked, the application immediately crashes and throws the following error through LogCat:
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The line in question refers to this line inside of onCreateDialog:
coverLarge.setImageBitmap(book.getCover());
I don't get why coverLarge is null at that point.
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Feb 25, 2013
I am getting a nullpointerexception. Only thing is, it doesn't appear to be there at all devices, so is rather strange to me.. an idea is that it would be Bitmap, but since I declare it myself I guess this is not correct? Since it is not happening on my own device I just have to be sure...
[HIGH]Bitmap bm = BitmapFactory.decodeResource(C.getResources(), resId);
Bitmap result = mark(bm);
public static Bitmap mark(Bitmap src) {
int w = src.getWidth();
// int w = 150;
[code]...
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Jul 10, 2009
I am getting a NullPointerException at android.app.ActivityThread$PackageInfo$ServiceDispatcher.doConnected(ActivityThread.java:1012). My application is not even in the stack trace, so I have no idea what is going on. I am trying to connect to a service when it happens.
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Jun 28, 2010
I have a project that builds against Android v2.1 . I can run it fine on a phone running 1.5 but when I try to launch it with an emulator running 1.5, the emulator doesn't show up on the list of available AVDs. I have the <uses-sdk android:minSdkVersion="3"/> tag in my manifest but it doesn't make a difference.
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Aug 19, 2009
I am trying to get the list of process running in the background.
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May 16, 2009
If the value of imageFileName is null, why can I not change null into a string? It was working before 1.5. String imageFileName = myFile.imageFileName.toString(); This gives me the a NullPointerException Error.
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Nov 4, 2010
I've created a class which is an extension of Thread. This class hits a web service and throws some data on screen. I don't care about persisting this data (the screen displays search results).
Currently, the user simply types into an EditText and clicks a search button. I'd like to take away the search button and implement something similar to Google's Instant Search where, as you type, the search results get updated.
This means, as the user types, the search parameters change. I want to be able to kill the currently running thread (if one is currently running) and spawn a new one with the new search string. How can this be achieved? Can I do it with Thread or will I need to use a new object?
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Oct 19, 2009
I noticed that if i dont use the app to kill running apps after i exit them they are still running in the background is this normal for the Android? I am coming from Pre so not sure if they are killed when exited.
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Nov 9, 2010
Does anyone know if its possible to run an app within another? My app has 2 panels, and each runs an independent instance of gmail?
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