Android :: ClassCastException When Casting Custom View Subclass
May 23, 2010
I've run into an early problem with developing for android. I've made my own custom View (which works well). In the beginning i just added it to the layout programmatically, but i figured i could try putting it into the XML layout instead (for consistency).
So what i got is this:
main.xml:
CODE:..........
(Theres obviously more, but you get the point)
Now, this is the stacktrace:
CODE:...........
Why cant i cast my custom view? I need it to be that type since it has a few extra methods in it that i want to access. Should i restructure it and have another class handle the logic, and then just having the view being a view? I'd really like this to work though.
View 2 Replies
Jul 3, 2009
Why do I get java.lang.ClassCastException when I tried to cast back an array of custom object that implements Parcelable?
Here is the custom class:
CODE:..........................
View 2 Replies
View Related
Mar 16, 2010
I'm sure there's a simple answer to this, but...Why can't I nest another view type within a View element? In my layout file I try:
CODE:...
And this gives me a ClassCastException. Why?
View 11 Replies
View Related
Jun 6, 2010
I'm subclassing Android's view class, but whenever I make an instance of the view from another class, the constructor never gets called (or so it seems). I've implemented both public myclass (Context context) and public myclass (Context context, AttributeSet, attrs) I can't figure out what I'm doing wrong. Do I need to override onDraw and onMeasure?
View 1 Replies
View Related
Apr 19, 2010
I'm implementing custom widget exdending a View class. But I've found that View's protected field (e.g. mLeft) is not accessible from subClass
View 2 Replies
View Related
Aug 17, 2010
I want to build my own custom view which should look like the Crysis-GUI.At first I designed a XML-based Layout and made it visible via the setContentView(int resid)-Method. Worked pretty well.But now I wan't to go a step further and draw in my Layout. So I created a new Class, let it extend View and overrode the onDraw()-Method. So far so good.But how can I still use my XML-Layout? I can't do setContentView anymore, so how could the same effect be achieved?
View 1 Replies
View Related
Jun 14, 2010
Calling a .net SOAP1.1 web service from android using ksoap2 lib I met a problem of casting response to a custom object. For instance the code below is called correct after httpTransport.call(soap Action, soapEnvelope); and have data inside. But I cant't cast it to specific object neither to SoapObject or Vector as I saw in several examples, I get CastException or simple nothing. If somebody knows how to deal with it,Code...
View 1 Replies
View Related
May 26, 2010
I have a custom view that works fine and I'm trying to get gestures into it. The most common technique I see is to add XML, such as this (from Android docs.Can someone point out my errors, suggest a better way that will allow me to get gesture callbacks and/or suggest diagnostic approaches?
View 1 Replies
View Related
Nov 3, 2010
I am on Android 2.1 and I have one multi column Custom listview Using BaseAdapter with an editable edittext at the end of the listview. If the data in the listview do not contain the data of user choice then user should be able to enter data. If the data is already there in the list user will be able to select the data using custom selector. If a selection is made in the list view and user wanted to enter data in the text field at the bottom after selection then the marker in the list view should be unselected. I tried to use onclick() method on edit text using click listener. First time when it is clicked, edit text is getting focus and onclick() method is not fired. And when it is clicked second time, onclick() method is fired and notifyDataSetChanged() method is called. I tried to call the notifyDataSetChanged() method from the Focus Listener, list view selection is gone in my first attempt and edit text is not receiving any data input from the keyboard (frozen).
View 1 Replies
View Related
Jul 16, 2010
I've created a custom view in an SQLite database for an Android application. I'm using Sqliteman on Ubuntu to test my SQL statements before I put them in my app. I'm trying to do a simple select statement on my view. The select statement works fine in SQLiteman but when I put the same statement in my code it throws an error. The statement: select * from item_view where parent_item_id = 0;........
View 2 Replies
View Related
Jul 8, 2009
I'm creating my own View class, and defining custom xml attributes with a attrs.xml. As long as I provide each attribute manually, there is no problem, but
code:...................
The android:text is properly set in my instance, but the borderDrawable is not. I guess this has something to do with namespaces, because inside the styles.xml, the name="mypack:borderDrawable" is not handled by the XML parser's namespace facility, because its inside an attribute value. So "mypack" is in no way connected to "http://some.weird.url.com/seems/not/to/ matter" and adding it via xmlns:mypack... to the stylefile would not help, I guess. In the same file, "android:text" is somehow recognized, even though "android" is AFAIK only a ns-defintion for [url], which is also not declared in that file.
So what is the proper way to set a custom attribute in a style?
View 3 Replies
View Related
Aug 30, 2010
I try to establisch a HttpsURLConnection with:
CODE:.................
But I get an Exception:
CODE:......................
But I can't find out, why. The same example is everywhere across the web.
View 2 Replies
View Related
May 27, 2010
I'm suffering from this for a week, i was trying to use the famous SeekBarPreference in a dialog - http://android.hlidskialf.com/blog/code/android-seekbar-preference
I copied the class from above link into my project. Then created the xml as brightness.xml:
CODE:............
Finally I try to integrate it as custom dialog:
CODE:...................
But always getting error: "Error inflating class java.lang.reflect.Constructor" at this line "<com.yoomap.anymode.SeekBarPreference" in the xml
Root cause: ClassCastException on SeekBarPreference.
View 3 Replies
View Related
May 2, 2010
I defined a local Service:
CODE:.....
The corresponding interface:
CODE:...
Then i try to bind the service in another activity in another application, where the same interface is available:
CODE:........
And
CODE:.........
But the line
CODE:......
Always throws a
CODE:...........
I can't explain why, I followed the app sample on http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/app/LocalServiceBinding.html.
View 1 Replies
View Related
May 15, 2009
I have a Activity and I have a class which extends this Activity. In this subclass I call:
startActivity(new Intent(this, CameraView.class))
Which should start the "CameraView" Activity. However, I always get this error:
CODE:...........
If it makes any difference the subclass creates a ListView and when a row of the ListView is clicked it calls startActivity();
View 5 Replies
View Related
Jan 16, 2010
I am new to java, eclipse, and android development, so I may be missing something simple although I have checked basic stuff like spelling several times.
Because there is no number picker control (such as that used in the date picker) in the public Android SDK, the conventional wisdom is to "clone and own" the control that exists in the Android source.
In an attempt to do that, I have copied the code for NumberPicker into my project and its dependency, NumberPickerButton. I have also copied the supporting resources.
The problem I am having is that when I try to include the NumberPicker in a layout, the rendered version of the layout within Eclipse does not work.
CODE:...............
Adding that tag causes the Layout view of the XML file to only show the following error.
ClassCastException: com.spencerandbrown.PatientTracker1.NumberPickerButton cannot be cast to com.spencerandbrown.PatientTracker1.NumberPickerButton
I have tried both the fully qualified name and the unqualified name and it makes no difference.
The strange thing is that the control works at run time, it just will not render in Eclipse.
Is there a solution for this issue? Am I just doing something wrong?
If necessary, I can include more code from my project to clarify.
If I reference the internal Android widget, it works fine in the Eclipse layout view, but it is clumsy to interact with that way and it might break in the future.
CODE:............
Here is the stack trace from Eclipse.
CODE:........................
View 2 Replies
View Related
Nov 24, 2010
I have one subclass which extends Dialog class, it seems I can not use startActivity() function to start a new Activity in this subclass which extends Dialog class, how to resolve it?
How to start a new Activity in a Dialog subclass? (In my customized dialog subclass, I have one button, when pressed, I would like to have a new Activity start).
View 3 Replies
View Related
Nov 4, 2009
I have subclassed ArrayAdapter to set the color of text to RED if the string does not contain 100%, this has been added to a ListView. The problem is that some of the rows show as red when they contain 100%.
CODE:.....................
View 7 Replies
View Related
Aug 8, 2010
This is probably related to this question. I want to know if anyone else gets the same error as me and if there is a way to get around this. I did the following: Followed the instructions from this page. From the top, go to File -> Create a new project -> Android Project -> Create project from existing sample. Checked Android 2.2. From the drop-down menu picked SkeletonApp. Clicked finish. From the package explorer, went to SkeletonActivity -> res -> layout -> skeleton_activity.xml. In the tabs at the bottom of the editor area (editor area is the center of the screen) clicked on Layout. Then I got the error "ClassCastException: android.widget.EditText cannot be cast to andoid.text.ViewGroup". The full text of the error message is given below.
java.lang.ClassCastException: android.widget.EditText cannot be cast to android.view.ViewGroup
at android.view.LayoutInflater.rInflate(LayoutInflater.java:619)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
at android.view.LayoutInflater.inflate(LayoutInflater.java:296)
at com.android.layoutlib.bridge.Bridge.computeLayout(Bridge.java:397)......................
View 1 Replies
View Related
Jun 18, 2009
I've been trying to add a linear layout to a listview header. The listview appears fine and is working as expected, but when i try to add a linearlayout to the header i get a java.lang.ClassCastException: android.view.ViewGroup$LayoutParams occuring at the list.addHeaderView (ll); line. I thought it might be something in the complex layout i had so i switched it to just a linearlayout with a colored background and still got the same error. The end result i an trying to get is a list with a header that is all scrollable.
View 3 Replies
View Related
Jun 22, 2010
I am using service class to play the mp3 file using media player object on Android platform, problem is, i am not able to handle the alarm interruption.When any previous set alarm clock reach to it's alarm time it starts to play in parallel with mp3.I want that mp3 should become paused and after alarm it again start to play,same thing should happen with snooze.
View 1 Replies
View Related
Aug 1, 2010
I don't think this problem is caused from my ListActivity subclass. I think it has something to do with with my BaseAdapter subclass:
package com.mohit.gtodo;
import com.mohit.gtodo.database.TasksDBAdapter;
import android.content.Context;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CursorAdapter;
import android.widget.TextView;............................
View 1 Replies
View Related
Mar 19, 2010
From the documentation for android.app.Application:
"Base class for those who need to maintain global application state"
I am using my own subclass to maintain an object that I'm using to query a server. Also from the documentation:
"onTerminate() Called when the application is stopping."
However, onTerminate() in my class is never called. I press the back button while viewing my main activity, and everything seems to shut down. My main Activity's onDestroy() method is called and isFinishing() returns true, but my android.app.Application's onTerminate() method is never called.
View 1 Replies
View Related
Mar 11, 2010
I am writing a adapter for a specific app, the problem I met is:
I have only 1 listview in main.xml, and the row style is defined in file_row.xml. If I simply use list.setAdapter(new ArrayAdapter<String>(this, R.layout.file_row, R.id.file_name, items)); where items is a ArrayList<String>, everything works well.
But if I use my custom Adapter, say, list.setAdapter(new MyOwnListAdapter(this, filename)); and in the class of MyOwnListAdapter, the code has been simplified as
CODE:................
But I always met the problem which is:
CODE:.........
I thought the self-defined Adapter class actually has only one line of valid execution, which is super(context, R.layout.file_row, R.id.file_name, filename_list); It's essentially identical to direct calling of list.setAdapter(new ArrayAdapter<String>(this, R.layout.file_row, R.id.file_name, items)); Then why I always got this error if I call my own Adapter?
View 2 Replies
View Related
Nov 16, 2010
I've found a example on this site on how to make a subclass of the application for android.
I've created this code
package mensand.test;
class TestApp extends android.app.Application { }
Added this line to the manifest
android:name="mensand.test.TestApp"
And when i run the app it's starts with a force close message.
When i remove the line from the manifest all runs ok
View 2 Replies
View Related
Jun 2, 2010
I have a ListActivity which is being filled via an internal class "OrderAdapter" - while the list is being populated I set various OnClickListeners on the TextView elements which should open the same view with different parameter values per line. My problem I have is that no matter which entry in the list I click I will always get to a view with the same parameter ID (it's always the ID of the last line in the list) - even though the output of the ID varies if I output it to the TextView.
Here is the code of the internal class which populates the list in the ListActivity:
CODE:.............
Any ideas why it always opens the view with the same ID even though the TextView "tvCheatTitle" displays a different value in every line?
View 4 Replies
View Related
Jun 11, 2010
I have put some instructions in onLowMemory() callback and want to test the same. Is there a "direct" way to test onLowMemory function of the application subclass?
Or will I have to just overload the phone by starting many apps and doing memory intensive tasks?
View 2 Replies
View Related
Mar 16, 2010
I am having a problem with an application I am in the middle of writing which is causing me some serious headaches.
The situation is this:
The application allows the user to configure several different kinds of information in several activities.
One of the activities, which is a subclass of Activity, takes data from the user and stores it in a shared preferences instance that I create manually and edit in code. This activity requires a complex screen layout that I do not believe would work well with a PreferenceActivity, hence me rolling my own in this case.
Another one of the activities, which is a subclass of PreferenceActivity, is a straight forward list of preferences, each with a list options - standard stuff.
I am finding that any data that I store from the first activity, my bespoke preference screen which manually adds the data using a StoredPreferences.Editor instance is overwritten once the user selects an option in my activity that extends PreferenceActivity.
View 4 Replies
View Related
Apr 30, 2010
I get a NullPointerException calling a Superclass Method in Subclass Inner Class Constructor... What's the Deal?
In my application's main class (subclass of Application), I have a public inner class that simply contains 3 public string objects. In the parent class I declare an object of that inner class.
CODE:...................
After I instantiate the object in the constructor, I get a runtime error when I try to assign a value in the inner class with a superclass method.
Can you not call superclass methods in the subclass constructor?
View 3 Replies
View Related
Oct 9, 2010
I'm writing my own custom view, a keyboard, which I think the ArrayList in the keyboard view is causing the application to quit in the emulator.
public static ArrayList<HexButton> hexButtons = new ArrayList<HexButton>();
The application ran fine when I did
setContentView(myKeyboardView);
But I want to nest my keyboard with a TextView so I'd like to be able to do
setContentView(R.layout.main);
View 2 Replies
View Related
