I'm new to android development so sorry if this is a stupid question.
The SurfaceView doesn't seam to have an onMotionEvent to override. Is there anyway to capture onMotionEvents with a class extending SurfaceView?
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I'm very new to Android programming, so this is probably something pretty basic. I just have an xml layout with a few buttons. I'm trying to follow the model given by the JetBoy demo, so I'm adding a view to the layout which extends SurfaceView. When this new view is put in my xml layout, I just get a blank screen.
Here's the XML layout if it helps. The gameview element is what causes the screen to be blank
CODE:......................
I have an application with various tabs (on a tabhost), each tab is an activity that extends activity, and haves some textfields and things on it
now i need that my tabs have inside a listview, but in the example from android developer guide says that you have to extend ListActivity and not Activity
basically i need to merge these two tutorials:
http://developer.android.com/resources/tutorials/views/hello-listview.html
http://developer.android.com/resources/tutorials/views/hello-tabwidget.html
i want to know how can i use a listview without extending listactivity on my class
someone knows? code...
I was experimenting with extending the Intent class but don't seem to make it work properly. I am wondering if extending is even possible. Here is the snippets.
Code for custom intent: Code...
In a book I read, the author suggests to extend the application class in order to have a place to be used as a singleton. In this way, it is easy to make some initialization stuff in it onCreate().Now my question: if my application has also some broadcast receivers declared in the manifest, and the application was not started explicitly, or it was but then the os reclaimed it resources back, what will be happening if the broadcast receiver is triggered? Will the onCreate of the application class be called first?
View 7 Replies View RelatedI was informed in a later answer that I have to add the GestureOverlayView I create in code to my view hierarchy, and I am not 100% how to do that. Below is the original question for completeness.
I want my game to be able to recognize gestures. I have this nice SurfaceView class that I do an onDraw to draw my sprites, and I have a thread thats running it to call the onDraw etc .
This all works great.
I am trying to add the GestureOverlayView to this and it just isn't working. Finally hacked to where it doesn't crash but this is what i have
CODE:..........
The onGesturePerformed is never called. Their example has the GestureOverlay in the xml, I am not using that, my activity is simple:
CODE:................
So I am at a bit of a loss of the missing piece of information here, it doesn't call the onGesturePerformed and the nice pretty yellow "you are drawing a gesture" never shows up.
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 RelatedOne using a Surfaceview, and the other using a custom view. According to the android SDK development guide, using a surface view is better because you can spawn a separate thread to handle graphics. Th SDK development guide claims that using a custom view with invalidate calls is only good for slower animations, less intense graphics.However, in my simple app, I can clearly see that using a custom view with calls to invalidate seems to render faster.What do you guys know/think about this?My touchEvent code is exactly the same, and my drawing code is exactly the same. The only difference is that one is all in the UI thread, and the other is using a tread to handle the drawing.
View 1 Replies View RelatedI'm creating a new class, using eclipse "New Java Class" dialog box. I can write the superclass I want (I can't find using "browse" button), but I can't write or select an interface to implement. I click "add" but ther is nothing to select. What I'm doing wrong?
View 4 Replies View RelatedI'm just getting into Android development, and I have a question about communicating between a receiver class and an activity class. I'm very new to JAVA and Android so I hope I don't sound too stupid. I'm developing an application where I intercept an SMS message and then based on various elements of that SMS I might delete it once it's been saved to the inbox. I have a receiver class that intercepts the txt message, and I am also able to delete messages from my inbox with code in the activity class using a button at the moment. The problem I have is communicating between the receiver class and the activity class where the code to delete a message resides. I tried putting that code directly into the receiver class but as I'm sure most of you already know the BroadcastReceiver class doesn't seem to support what I need to delete messages. I've been searching for an answer to this for a while, but haven't been able to find anything. Honestly I'm not sure I know enough about JAVA and Android to even recognize a solution if I saw it.
View 2 Replies View RelatedWhat I want to do, is be able to access the object neoApi inside the Neoseeker class, from its inner class RunningTimer. Now, in my code, you can see what I would think to work, but when I run my application, nothing pops up. Nothing inside my TextView, no Toast, nothing at all. How can I remedy this?
package com.neoseeker.android.app;
import java.util.Timer;
import java.util.TimerTask;
import org.json.JSONObject;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;.......................
I'm new to Java and android development. In my application I need data which is accessible for a few activities. I've read that a good solution is to use Application class for this. So I use it like this:
public class MyApplication extends Application {
private String str;
public String getStr(){
return str;
}
public void setStr(String s){
str = s;
}
}
and I can access this variable from activity like this:........................................
I have just started android. I just want to know that how can i call activity class from other java class. i just want to pass class object to activity class.
public class GsonParser extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
MagazineThread thread=new MagazineThread();
thread.start();
}
public GsonParser(JsonMagazineParser Obj)
{
}
}
and i am just doing like from other class. GsonParser obj=new GsonParser(this);passing obj to activity class.how can i achieve that.
In my app in one package there are some classes. from those classes i want to run one class that is the Gps functionality class. i want to run that class in background. how i do it, i don't know. i am not able to make it solve from any document. if anybody knows the way to solve it please me by run a "hello world" app in the background. i am not able to solve this problem by going through document.
View 2 Replies View RelatedI'm building a small Android application, but this is more of a Java question than an android question. Looking through the tutorials there are lines that look like: startService(new Intent(this, MyService.class));
What exactly does the "MyService.class" field represent? Is that just a reference to the class for a template?
I made a Dialog Class with it's view classI want to pop up the dialog when I got some packets from network. so I made a Thread which parses packets and then I made if clause in Run() method There is no problem with parsing packet but when I enter "if clause" and call showDialog() I got Error message
Is there anyone who knows how to pop up a dialog from different thread?
I'm just getting into Android development, coming from a mostly ruby and scheme with some Java background. For a first project, I decided to try and build a stopwatch.
The included Chronometer widget doesn't quite have the functionality I wanted, so I copied its code into my own package. However, when I try to build it, I get the following error:
CODE:...............
If I remove the RemotableViewMethod annotation, the code compiles, but crashes with an IllegalStateException as soon as I call a method on the widget, as seen in this stacktrace: http://www.pastebin.org/50243 .
Looking through the android source, you can see stock widgets using the RemotableViewMethod all over the place, but for some reason, my code can't.
So, my question is this: What can I do to enable the RemotableViewMethod annotation in my custom widgets? Is there something I should be doing differently in order to code custom widgets?
I have trouble (example<http://groups.google.com/group/android-developers/browse_thread/threa...>) wrapping my head around styles/themes. Can somebody help me or point me to actual documentation?
Let's say I have a drawable that I want to use as the background of a layout:
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle>
<gradient android:startColor="#9F9FA4" android:endColor="#66FFFFFF" android:angle="270" /> </shape>
Now I want to have a dark and a light theme. Depending on the chosen theme I want to have a different value for startColor and endColor. How do I do that? I am aware of extending themes, but what do I put into the items? How do I reference those new values then?
I want to extend the built in media player, however when i grab the sources, there are a lot of external dependencies that are hard to track down. Is there any way to get the source and the dependencies so that i can have it as a standalone and then extend it, is this even possible?
View 1 Replies View RelatedI know this question was asked couple of times in this list, but I haven't found any answer in archives, and last time this subject was debated almost a year ago. Does anyone knows is it now possible to somehow extend contacts functionality (for example: add custom field for VoIP phone number in which case user can use it to start custom activity for voip)? What are Contacts.ExtensionsColumns for?
View 7 Replies View RelatedI get a result as http://i3.6.cn/cvbnm/e1/71/e9/19008bd7258eaf858be73dc6431b1f8b.jpg,
i want to get two tab,could you help me? Code...
Ultimately I wish to produce a compressive Contact Manager with some specific features. I thought it would be good to experiment by extending Contact. So using git I checked out froyo-release and tried to build it. That didn't work so well as it contains things like
Suppress the internal stuff under the assumption that I really don't need it. Start with a toy Contact Manager and implement (reinvent) everything.
My guess is that I am going about this incorrectly. "I want that third alternative" --kirk.
Just for completeness, the new special behavior is to provide an action list for a contact based on the types of that entities data.
Im using the NotePad example as a base for an application. This binds a ListActivity to a Provider.
Its perfect, except it uses SimpleCursorAdaptor, which means the list only binds to and displays one item per row. I want it to display two items, both bound the Provider. Or more accurately display the text from one Content Provider field and an icon which depends on the value of a different field.
This sounds like a pretty simple thing to do, a very slight modification to the NotePad application. Trouble is, I have no idea on *how* to do it. I really need a starting point, and "approach" to use.
So far I have tried (unsuccessfully):
* Hand populating the ListView by reading in the Provider data and populating an array in OnCreate. This works, except as the data is not bound the List does not update when I add an item.
* Extending SimpleCursorAdapter with a custom getViewBinder. Could still only bind to a single column.
* Building my own ListAdaptor. Couldn't get this to work.
* Concatenating both fileds together and "parsing" 2 fields into 1 field read/write.
The next thing I will try is extremely tacky running two separate simpleCursorAdaptors in two views in a Linear Layout, fudged so the row height is identical, and duplicate the logic.
I say this only to show that I really, really have tried.
How I can create a custom CursorAdaptor which binds to two fields instead of just one like SimpleCursorAdapter?
Is there a way to extend Webkit on Android? Can we write plug in for webkit in android? Can we do things like creating our own renderer for a particular type of data embaded in the webpage? Can we track user session or modify data stored in the browser cache/memory?
View 2 Replies View RelatedI am extending a theme by creating a style.xml
View 4 Replies View RelatedI had a basic question. Can my class extend 2 or more classes at a time. What is the syntax. I want to extend Activity as well as Application. Wont this create problems in the manifest file? Activity because, I need to do a couple of things during the onCreate() [binding a service]and Application, because I am creating objects of another class [service class]which needs to be accessible throughout my application.
View 8 Replies View RelatedIs there a way to display a MapView without extending MapActivity? I have other Activity class which I'm extending and I would prefer not to change that... I've seen that you can inflate using MapActivity, but didn't find any spec/examples on how to do it.
View 1 Replies View RelatedI'm creating a custom widget that extends AdapterView. Imagine something like a ListView except that the list items can overlap each other with some transparency. Because of the overlap, I'm trying to control the layout and drawing order of the children.
My issue is that the control renders it's children, but ONLY one level deep. Each child is inflated from an XML resource that contains a FrameLayout and an ImageView. The FrameLayout draws, but the ImageView is never visible. I assume I need to call some method to tell the FrameLayout to layout or draw it's children, but I'm not sure what, why, or where. Does anyone know what I'm missing?
Here is the relevant code for my custom widget: Code...
While programming on Android, I end up writing a parent activity which is extended by several others. A bit like ListActivity. My parent activity extends Activity. if I intend to use a Map or a List, I can't use my parent activity as superclass - the child activity can only extend one activity obviously. As such I end up writing my parent activities with the same logic for Activity, ListActivity, MapActivity and so forth.
What am I looking for is some sort of trait functionality/design pattern which would help in this case. Any suggestions?
I just got my HTC Desire with Android 2.1, and the first problem I'm running into a lot is when using the visual keyboard. Being multilingual and having friends who only speak one particular language, there's no single 'correct' input language setting for the word prediction feature, so I started looking into how much work it might be to extend the keyboard with two rather basic, though essential, features:
1) Showing the current language selection, so that I don't have to type stuff, getting it mis-corrected, then discover the language setting must be wrong, go into the settings, select to change language, select language, etc. until I get back, erase the old text and start over. That gets old real quick.
2) Being able to simple change whatever language is used for the word prediction by just having a button on the keyboard doing that directly, i.e. a button that just cycles through the 'relevant' languages with the key label showing which is currently active. Improving it even further, one might imagine:
3) Having a per contact setting, noting the word-prediction language that should be used when communicating with that user. But searching through the docs, I'm slowly coming to the realization that the input text language setting may not even be available to be changed outside the system settings dialog, making this impossible to implement - is that correct?