Android :: Call Java Methods From One Java Class To Another In Android?

Nov 3, 2010

i hav two classes...both classes are extends activity.. i need call other class method on main class on android development..its urgent..please.. i done something like subclass sub = new subclass()...its not work..

package org.me.intent_testing;
import android.app.Activity;
import android.os.Bundle;
import android.widget.;
import android.view.;
import android.content.Intent;...........

Android :: call java methods from one java class to another in android?


Android :: Call Java Class Methods To Other Java Class File On Android

Nov 3, 2010

i hav two classes...both classes are extends activity.. i need call other class method on main class on android development..its urgent..please.. i done something like subclass sub = new subclass()...its not work..
In 1st activity class

package org.me.intent_testing;
import android.app.Activity; import android.os.Bundle; import android.widget.; import android.view.; import android.content.Intent;

/** * * @author pavankumar */

public class FirstActivity extends Activity {................

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Android :: Service Unable To Call Java Class Methods / Way To Fix?

Jun 22, 2010

Hi, custom classes which are part of a framework, so nothing graphical. One of those (singleton) classes is a Logging class which send logs to my server. I noticed that even though I can call the classes methods in my service it actually won't be logging anything... In my specific example it's osmething like : Logger.getInstance().log("Whatever I want to Log"); Obviously the getInstance is a static method so it can be accessed from anywhere within my project right away.. I was wondering though why this method for example isn't getting called ? Also how do I debug a Service ? Btw I am using of IPC from one of my Activities which gets bound to the service and can start/stop the music for example...

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Android :: Call Java File On Click In Another Java Class?

May 19, 2010

i have two files

App.java
Gallery.java

App. java contains frontend buttons and functionalities Gallery.java lists the imagesin the sd card. i want to call Gallery.java in click event in app.java

App.java
package gallery.display;
import android.app.Activity;
import android.os.Bundle;
import android.view.View.OnClickListener;
import android.view.View;...........

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Android :: How To Call Java Methods From C++ In JNI?

Oct 10, 2010

So I'm writing an Android app which uses a large c++ library. I have everything working so that the java app can call the c++ delegation methods, but I'm finding myself wishing I could log messages from c++ to the Android log. This is easy from java, but I'm at a loss as to how to call a java method from c++. My searches found methods for opening a jvm from c++, which is not at all what I want to do. Ideally, I'd like to pass a log method pointer to c++, which could then be used whenever I wanted. Of course, java doesn't support method pointers.

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Android :: Call Activity Class From Other Java Class?

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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Android :: Call A Value Entered In A UI To Your Java Class?

Jan 23, 2010

Making a simple app for my android.

in my xml interface there is a text box in which the user will input a number (for example: 10). the id of this text box is "input1"

how do I call the value of input1 in Java and then perform a calculation on it?

For example...

suppose input1 = x

x + 5 or x*2

and for that matter, how do I have the resulting value appear as constantly updated text output in a specified place on the UI?

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Android : Program Crashes When I Call A Class From Another Java File

Oct 26, 2010

I am new at android development and java programming, but I have decided to program a drinking game app in android. This app basically simulates a deck a cards, a player clicks a button to draw a card then based on the card thats drawn the player plays a drinking game (ie takes 1 drink, takes 2 drinks ect).

I have the main program in one java file, and the code that shuffles the card deck and puts the card sequence in an array in other java file. My problem is that whenever a class from the other java file (classicMode.java) is called from the main program (fubar.java), my android program crashes and gives the error : "The application Drinking Game - FUBAR (process com.games.dg) has stopped unexpectedly. Please try again". Code...

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Android :: Java Reflection To Call Higher API Level Function / Abstract Class

Jul 6, 2010

My point is to be able to call a 2.1 API if it exists, while the application should be able to run in 1.5
Specifically, I am making a GPS application which would like to call android.location.LocationManager.addNmeaListener if available. My problem is that this call takes as parameter an abstract class (GpsStatus.NmeaListener) which I cannot pass directly to Class.GetMethod (or my application won't work in 1.5). What I am currently trying is a) to create a wrapper class for GpsStatus.NmeaListener:......................

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Android :: Java Compatibility With GetFields Method In Android Java.lang.Class

Feb 11, 2009

I'm having some problems porting a Java application to work in Android platform. I detected an incompatibility problem between java sun and Adroid sdk in java.lang.Class. I oberved that: public Field[] getFields() Returns an array containing Field objects describing all fields which are defined. That's array is sorted as attributes are declared in the main Class in sun jdk. For example, next Class is defined as: public class Example { public boolean stop; public int atr1; public String name; ....
}

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Android : Can Not Call A Java Method Using Add Java Script Interface()

Mar 16, 2009

I'm trying to call a java method from javascript using addJavascriptInterface(); but seems does not work, it always display "failure"; java code...

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Android :: How Java Generate Signatures For Methods

Oct 1, 2010

I have an Java class with a static final method getAll:

CODE:..............

Now I want to hand in null as a value for the where statemant so that it will just be ignored later on in the code. Anyway in the testcase for this method I have: Vector<Category> categories = Category.getAll(context, null);

Which then in turn gives me a NoSuchMethodError. I don't know exactly why it does that. The only thing I could imagine is that the null I hand in would not match the signature of the above method. But how can I overcome this? I already thought of overloading. But this would just end in rewriting most of the code. At least when I do it, how I think.

This is the stack trace I get:

CODE:.......................

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Android :: Way To Create Methods / Threads In Java?

Sep 7, 2010

I want to create one method and call the created Thread inside that method in my Android Application, I am new to Java as I had told before. Can anybody giive me an example of how should I create a method and call a Thread inside that method!

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Android :: Android / Java - Call Function In Separate *.java File?

Aug 16, 2010

I do an import of the full package name / java file, and if I do a <classname>.<method>, SOMETIMES I can get it to access - other times I get a lot of can't use a static in a non static bunch of talk. I'll admit I'm new to Java, so what do I need to do? Call a class instance first, then call my methods? I'm rather confused by this, as I want to put all of my 'functions' into a FunctionsList.java file, and all of my main Activity (UI) into a MyActivity.java file.

For example:
<MyActivity.java>
import com.example.FunctionsList;
private class MyActivity extends Activity {
FunctionsList.function();
}


9/10 times I get that static/non-static error. If I put all of my functions into MyActivity.java, I have zero problems!

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Android :: Creating A New Class Using Eclipse New Java Class Dialog Box

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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Android :: Java.lang.VerifyError When Calling Static Methods

Nov 5, 2010

I am working on an Android project that uses classes and methods from a seperate JAR file I am also creating, and the issue is with a specific util class called XpathUtil that is throwing a VerifyError every time I try calling one of its static methods. Here is how my XpathUtil class looks like:........................

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Android :: Can A Native Application Use Java Methods In Telephony Manager?

Sep 17, 2009

I am currently working on porting a application written in C in android platform. I need to know that can i invoke/call the getSystemService from the C application using invocation interface by JNI. Meaning using a .java file which will interact with the interace provided by the android.telephony.TelephonyManager.java for using getCallState() and other mehthods.

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Android :: Call AsyncTask Methods From Another Class - Service - Callbacks?

Jun 1, 2010

I was wondering if it's possible to call specific methods defined within the AsynTask class from another class and/or service ?

In my specific case I have a Service playing some sounds, but the sound is selected from a List with available sounds...

When a sounds is selected it is downloaded from my home server, this takes some time (not much, let's say around the 3-4 seconds, the sounds/effects aren't big in size)...

So my problem at the moment is that I have a service to play those sounds, and when I select one I wanted to show a progressdialog... The way (if I understood correctly) is to use an AsyncTask, but the only thing the AsyncTask will do is telling my Service to play a specific sound from my server... So there is no "callback" from the service to the Asynctask...

How can I call a running AsyncTask, which sits in another class, and tell him all work is done and thus he can stop showing the ProgressDialog ? Or am I over-engineering it and there are other ways ?

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Android :: In Java, What Does A Reference To Class.class Do?

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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Android :: Util Class In Java

Sep 3, 2010

I want to know about the util Class used in Java. I am currently working on one Application in Android where I need to used a class from one file to another different file. I was told to import it like "import com.android.utli.(ClassName)" here the "com.android.util" is a package name.

Can I use thast class in my another file simply by importing the package along with the Class Name?

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Android :: Can Run Java Class Files

Jul 9, 2009

There are a lot of language which compiles into Java class files when can run on JVM (e.g. JRuby, Scala, Rhino). Can you please tell me if I can take those class files (compiles by the JRuby/Scala/Rhion compiler) and run it on Android platform?

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Android :: Java URL Class Can't Use HTTPS In App / Way To Do

Jan 11, 2010

I want to use HTTPS in my application. The Java URL class does not seem to do the job.

Does anyone have any pointers?

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Android :: How To Get Different Package Name For Generated R.Java Class?

Jan 24, 2009

Apt while generating the resources, is it possible to provide a different package name for the generated R.java class. Currently it seems to use the same package name as the one in manfifest defination of AndroidManifest.xml <manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.tejasoft.dialer.mobile.android"> Also, is there a way to give custom class name instead of default R name say Resources.

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Android :: How Do Import A Java Point Class

Sep 17, 2009

I am writing an android game. I need a Point class that stores x and y coordinates. I have found a class called java.awt.Point. Which looks like what I need. I have created an interface for java.awt.Point and put import java.awt.Point in my code. But when I do Point pos = new Point.

I get an error: cannot instantiate Point. Also if I do pos. I don't get x or y member variables. I could code my own Point class but I need to learn how to import stuff.

If I delete the interface for Point I get an error on import java.awt.Point. It says the import cannot be resolved.

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Android :: Class Java.awt.Font Error

Feb 25, 2010

When I try to edit project/res/main.xml using android layout editor in eclipse I get the error "Could not initialize class java.awt.font".

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Android :: Dex To Convert To Java Class Format

Aug 16, 2010

Is there any tool available to convert android dex file format to java class format? I've looked at dex2jar, but it looked very early in development. I'd like something that is stable enought for use.

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Android :: Possible To Put Each Class Into It's Own Java File In Eclispe?

Apr 20, 2010

I'm coming over from C# where I can make a namespace and then have each class placed into its own .cs file if I want, but in all of the examples I've seen for android all of the methods and classes are all in one big java file.

Is it possible to put my classes in to their own java files and then import those classes into a main program java file as needed like I do in C#?

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Android :: Error - Unable To Fnd Class R.java No Such File Or Dir

Oct 18, 2010

I keep getting this when trying to start a new project

ERROR: Unable to open class file C:UsersLeviDesktopAndroidworkspaceDroid1gencomandroidbookdroid1R.java: No such file or directory

I tried changing preferences to alter build path to project, but it still wouldnt work,,,

Is subfolder on desktop a bad place to install Eclipse?

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Android :: Run In Background - Service Vs. Standard Java Class

Jun 18, 2010

In Android, if I want to do some background work, what is the difference between

Creating a Service to do the work, and having the Activity start the Service VS. Creating a standard java class to do the work, and having the Activity create an object of the class and invoke methods, to do the work in separate thread.

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Android :: Accesing Attributes Of Java Class Using Webview

Sep 20, 2010

I am able to bind an object to Javascript through addJavaInterface() of WebView. I am able to access methods from JavaScript, Is there a way to access the java class attributes through JavaScript?

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