Android :: How To Pass Class Instances Between Applications In Droid
Mar 18, 2010
I have an application App1 which defines class A and uses instances of this class. What I want to achieve is - after App1 is installed on the device to be able to load App2 which defines and implements class B which is subclass of class A (imported from App1 package); and be able to get an instance of class B in the App1. Class B doesn't add any new interfaces, so using it as class A is ok. But I am not sure how to pass the instance of class B to App1 (preferrably without any user interaction).
Can anyone advise if this is feasible?
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Sep 18, 2010
I am writing a basic game engine and have an abstract class that represents any object that can be drawn in the 3D world, however inside this class is an abstract method Render() which I would like called automatically by the engine on each draw phase.
How could I implement this so that every class extending from my abstract class will automatically have Render() called? I am using java, android sdk 2.2, and opengl es
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May 5, 2010
How to create arrays of class instances in JAVA. code...
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May 11, 2010
I have an activity (called Sender) with the most basic UI, only a button that sends a message when clicked.This works ok, the message is sent but every time a message is sent a new instance of Sender is started on top of the other. If I call sendSMS method three times, three new instances are started. I'm quite new to android so I need some help with this, I only want the same Sender to be on all the time
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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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Nov 24, 2010
this is the first class, displays listview from sql and pops up a option on longpress. I wanted to pass the ID number of the current select row to be processed on another class.
CODE:............................
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Feb 17, 2010
Class AddText(extends Activity), Grafitti(extends MapActivity) and MarkerOverlay. Grafitti calls AddText, and AddText opens a new Activity that gets an input from user (EditText), then when that is successful Grafitti calls MarkerOverlay. The problem is I can't access the input in AddText. I need to use that input in MarkerOverlay, I tried creating a setter and getter but it won't work. (error) I've tried searching the web and I think the solution is Bundle. I'm having a hard time understanding how Bundle works. Is there any other way? or any code snippet on how to use Bundle. A code snippet would really help me a lot.
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Oct 15, 2010
I have been trying to get "getExtra" to work but without success, I have a listview with 4 choices which launch a webpage within a webView class, when the user selects the option lets say option 3 I want to pass the value of 3 to the webView class so that it will load the correct webpage, at the moment all I get is errors, can somebody help with where I am going wrong.
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Aug 12, 2010
I split my inner View class from my Main class into its own file. In my main class, I have the view set as an onTouchListener which records user movement into a matrix so it can translate and scale the view. After separating it everything works but im unsure how to pass the matrix to the View for onDraw to update. Any suggestions?
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Apr 12, 2009
I am looking for an example that allows me to pass a custom class to a remote process. So far in the doc remote service example only an integer is passed i would like to pass a class on my own. I have implemented the parcelable protocol but i am really not sure how to pass that class. Any help please?
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Jul 22, 2009
I need to correctly be able to differentiate between emulator instances. I know it's easily done with real devices. With real devices, you can use getDeviceId or getLine1Number from TelephonyManager. With emulators, all the instances have the same device id, same subscriber id, and same line1 number. Is there a way to differentiate them? Using NetworkInfo, I can call the toString method and I get my ip and the port on the computer. The problem with that is that the port is always different. I would like something more stable. Like when you use "adb devices" in command line. Emulator #1 is almost always "emulator-5556" and emulator#2 is almost always "emulator-5554". Is there a way to get the same info I get from "adb devices" in my code? If not, is it possible to use a command line parameter to force the emulator to use a certain phone number?
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Oct 29, 2010
I am writing a class in Android that requires certain parameters from the class that calls its functions.
For Example my class is called "DoStuff"
DoStuff has 3 functions:
CODE:.....................
Is there a way for me to have canvas, tick and toggle implicetly passed to the "DoStuff" when I call on it's functions from somewhere else (that somewhere is unknown to DoStuff).
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May 31, 2010
To describe my problem, everytime my location changes, it redraws the center maker on the map. Only catch is that it doesn't delete the previous one. I can get it to delete the previous one when the location is changed, but I have no idea how to pass the original overlay in-between classes.
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Sep 3, 2010
Can I pass a singleton class's object from one activity to another activity using intent? I am using singleton class as image class img = image class.get Instance();, so i need the img instance for another activity, how can i pass an object instance in Android.
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Mar 9, 2009
I want to pass a class reference to an activity, and then the activity will construct the view according to the content of the class.
How could I implement this function?
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Mar 26, 2010
I want to show messageBox or notification when connection lost in Static DB class but i cant use getApplicationContext() because its a static class and i tried to call other class called notification but i have error so how i could pass activity object to my new class .
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Oct 3, 2010
I have a class A which is responsible for fetching data from web services in android and i have a class B which is responsible for creating and rendering List View in android
Now how can i populate data on List View once the data is fetched successfully.
well i have following options but which one is better .. (if someone has anyother then i don't mind)
1) Create an intent of Class B and
pass the data that need to be
populated
2) Creating a static method int Class
B which will accept the data as an
argument and call setListAdapter
in class B i have used Holder Patter to create ListActivity. ( for reference List14.java in samples of Android )
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Feb 17, 2009
What intents do I use to pass a variable to another class? And also which intent do I use to receive it?
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Apr 19, 2010
I'm building an android application, which has a list view, and in the list view, a click listener, containing an onItemClick method. So I have something like this:
public class myList extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
getListView().setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
/* Do something*/
}
}
}
Normally, this works fine. However, many times I find myself needing too preform an application using the outer class as a context. thusfar, I've used: parent.getContext(); to do this, but I would like to know, is that a bad idea? I can't really call: because it's not really a subclass, just an embedded one. So is there any better way, or is that considered cosure? Also, if it is the right way, what should I do if the embedded method doesn't have a parameter to get the outside class?
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Nov 25, 2010
OK maybe I'm being paranoid and behind the rest of the world who has already done this: I'm afraid of adding my credit card to my Google Checkout account! My main concern being a super intelligent user of my Android phone who will buy a million apps (potentially!) - my 5 year old son
I used to have a credit card on my account - but that's expired
Knowing that the card had expired, I thought I would test out the buying of an app
I was surprised that it only took a few pages of my clicking yes to buy the app
(The purchase didn't go through - I got an email saying this because my credit card couldn't be charged)
Question: is there a secure pass code system to buy applications?
Like needing to input a code at the last step of buying
(I think this is how iPhone works - I say this not having owned one)
I don't think there is a secure pass system - I've played around with my phone loads and have never come across anything. BUT, EVEN if there was such a pass system: there's still something wrong!
I've bought my phone. Not made any changes. Just started using. I would imagine that's what everyone does - as opposed to buying and then customising and making secure (and maybe optimizing the use of energy so that it doesn't die within a few hours of use)
Buying an application: you can cancel within 24 hours (I think that's the time limit) Over the weekend, I let go of business life and only pick up on Monday - so if my son purchased and installed an application on Friday evening, I wouldn't find out until some time later - because I don't look at my phone OR my emails over the weekend! (+ Say if an application was purchased that I then managed to cancel - I then lose the right to buy again and trial with the right to cancel - a small point, but valid regardless I think)
Would be interested to hear what others say - maybe I'm missing something and maybe I'm using incorrectly.
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Mar 9, 2009
If you're interested in learning how to develop top class games and applications for the iPhone, HTC Touch (Android), Instinct, WinMobile, or any other mobile device or platforms - then you should definitely have a look at what they offer...http://EDUmobile.org
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Jul 13, 2010
I was just on there yesterday i go into browse tonight and now all of a sudden it says pass world invalid from last night till this morning i tried typing in the little letters they had and I cant read it so I go to the google site. I put the info in and it says sorry account has been terminated for terms and conditions I didnt even do any thing to violate them?
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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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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 14, 2010
is it possible to run multiple instances of the same app on android? What I mean if the app does not support multiple identities is it possible to install it twice and configure each instance separately?
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Apr 14, 2009
My app has 4 activities on the stack A->B->C->D (top)
If you press home and re-enter the application, another instance of A is started, so the stack is A->B->C->D->A (top). I know this because when I press BACK, A is popped off and I now see D (instead of going to the Home screen).
What I want is that when the user re-enters the app, they re-enter on the same activity they were in before (D).
CODE:................
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Mar 17, 2009
Is it possible to re-use all the instances of Activities and Services when an application is launched twice. For instance: 1/ I start my application APP1. Some activities are launched and a service is started. 2/ I click "Home" device button 3/ I can see the icon the launch again my application APP1 4/ I click on it and the APP1 is launched twice
I would like to re-use the existing the instances of Activities and Services from the first launch. I guess it is related to "SingleTop" or "SingleTask" but it doesn't seem to work.
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