Android :: Way I Can Load Class Based On SDK Version?
Jun 7, 2010
Is there any way I can load a class based on what version of the OS the phone is running? For example:
I made an app which requires 1.6+ Android. Is there a way for me to load one class or the other based on what OS the phone is running? I'm asking this specifically for contacts. The database was changed from 1.6 to 2.0 and the old version doesn't retrieve contacts on the new OS phone. I'd still like to keep my 1.6 requirement, but at the same time I'd like 2.0+ phones to access the contact part of the app.
So can I make 2 APIs, somehow pack them with the app and decide on the fly which I choose to import?
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Jan 11, 2010
I have been trying to find a solution for this for the last 3 days but i just failed hit a final answer!
I am creating a View-based class where i show a ball bouncing of the sides. I use a Timer to control the animation.
I want to add a TextView programmatically in my view class. I am trying to instantiate an object of TextView with reference to the context as follows code...
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Sep 29, 2010
I am new in android
I have created 2 classes.first extends activity and 2nd extends View.
I want to add buttons,image Views etc. into the second class.
how can I do this.
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Nov 2, 2010
Is it possible to dynamically load classes from a URL into your application in the same way as a desktop application can? For example, can you do a simple boot-strap application which you install onto the device, that boots up loads the main jars required for the applications from a server, or from a local jar on the SD for example?
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Feb 11, 2009
Is it possible to have the android load up another UI from a different class through a Onclicklistener? What I mean is that if I have two UI classes (c1 using m1.xml and c2 using m2.xml). Is there a way to load the c2 UI though the onlicklistener set on a button?
When I w programming in Java i usually add an actionlistener to the button and create a new instance of c2 in that actionlistener. That doesn't seem to work here, and so I was wondering if theres another way to do this?
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Sep 14, 2010
Is there a way to specify a background in a layout based on OS version?:
android:background_1.5="@color/white"android:background_above_1.5="@drawable/mybackground"
I'm running into a problem where using a 9 png drawable for the background causes a stack overflow exception on a listview item (stack trace shows its related to a child TextView -> drawText()). The layout is simple:
<LinearLayout><ImageView /><TextView /></LinearLayout>
and the background works fine on 1.6 and above. It's just 1.5 that's having the issue. If I set the background to be a color, it works fine.
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Aug 30, 2010
Is it posible to load a class from the internet in Android? My app would download a class with some data, save it on sdcard, and then load the class. I want this because loading data via classloader is much faster then from a file.
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Aug 23, 2010
Is there a simple line of code that would allow only loading the code if the OS version meets the requirements? Lets say I have my target OS as 2.2 but the min sdk is 3 for android 1.5 so even if i have some code in my project that isn't compatable with 1.5 it will still compile since the target OS is 2.2. Anyway, I want to ad a feature that requires code that's not in the 1.5 SDK and will cause a crash if it's loaded on a 1.5 phone. Is there a simple thing like this that I can do? So i dont have to make the entire app not available to 1.5 users?
if (Android OS == >2.1){
//Insert code here that requires 2.1 and up}
else{
//insert code that would appear is OS is <2.1}
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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?
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Sep 1, 2010
What I did was create two .java files. One that can compile and run on a 1.5 phone (SDK3) and then one that works on 2.0(SDK5) So for this example i'll call the 1.5 file ExampleOld and the new one Example. I was wondering if i just made activity like this if it would work sort of like a "portal" and pick the activity to load depending on the SDK so there is no crash or compile errors. Are there any changes I should make to my code? Maybe anyone out there that's had to do this before.
CODE:.................................
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Jun 11, 2010
I'm wondering if and how one can load dex or class files dynamically in dalvik, some quick'n'dirty test function I wrote was this:
CODE:.................
whereas the Foo interface is this
CODE:.................
and f.dex contains some dx'ed implementation of that interface:
CODE:...............
The above test driver throws at defineClass() and it doesn't work and I investigated the dalvik code and found this:
http://www.google.com/codesearch/p?hl=en#atE6BTe41-M/vm/Jni.c&q=Jni.c...
So I'm wondering if anyone can enlighten me if this is possible in some other way or not supposed to be possible.
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Jul 7, 2010
I'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?
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Oct 22, 2010
I have been assigned the task to use an android tablet to run a single app in an enterprise setting. Ideally, when one switches on the tablet this app should be loaded perhaps during startup and the user need not step out of this app. The app logic itself is rather easy but I am wondering if it is at all possible to load a single app during load and not allowing the user to step out of it.
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Jul 14, 2010
I'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.
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Jun 27, 2010
What 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;.......................
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Sep 8, 2010
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:........................................
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Oct 8, 2010
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.
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Sep 4, 2010
Is it possible to load a layout XML at runtime and load into activity?
In my app, I have various types of data like Person, Company, City, etc; The requirement is to dynamically load the layout, find views by tags (property names like Person.name, Person.address) and then fill in data. For example, if user has selected an object of type Company, we want to load a company.xml layout, inflate it and then associate various properties (company name, company slogan, city, address, revenue) to tagged views. One possibility I see here is - each view in the layout will be associated with property-name as tag and then appropriate data will be loaded in appropriate views.
What should be the best design you would recommend?
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Apr 23, 2010
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.
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Jul 20, 2010
I'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?
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May 19, 2009
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?
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Jan 19, 2009
Is it possible to use linux version flash player plug-in on x86 for android x86 version?
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Aug 31, 2010
What are C based services and Java based services in Android? What is similarity and dissimilarity between them ? Are C based services available in Android?
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Apr 5, 2010
I used to be a C/C++ programmer before getting in to android. I am not sure how people maintain 2 versions of a program without using #ifdef preprocessor macros. Right now I am changing the package name in eclipse and changing the code manually, but this seems really inefficient. Can anybody suggest a good way of having 2 or more projects that share most of the code?
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May 25, 2010
I'm planning on getting LockBot when I get my EVO and I was wondering, what's the difference between the free version and paid version. I basically want the Moto Droid lock screen on my EVO for the slide to toggle sound on/off feature due to the lack of an external switch on the EVO. Would I be best to get the paid version or will the free version do that?
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Nov 1, 2010
I created a method called insertTable in a class called Table but i can't use it in my onClick method in the main class :
CODE:.......
I want to do a income.insertTable in the onClick method but eclipse say that i need to create a local variable.
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May 26, 2010
How to get the MIDlet and CLDC version programmatically in android? Regards, Sudeep Warm Regards, Sudeep
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Oct 15, 2010
if there are five text in a text view and we want to pass one of them on click event to the next class text view which method i m used on android
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Dec 1, 2010
is the 2.1 firmware version dj07 baseband version the latest update available for the samsung moment?
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Aug 20, 2010
Possible? ON some sites, the mobile version is horrible...
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