Android :: Interaction Between Java And Android
Apr 8, 2010
I am currently trying to research how to use Android with an existing java based system. Basically, I need to communicate to/from an Android application.The system currently passes object data from computer to computer using ActiveMQ as the JMS provider. On one of the computers is a display which shows object data to the user.
What we want to do now is use a phone (running Android) as another option to show this object data to a user with wifi/network access.Ideally we would like to have a native application on the Android that would listen to the ActiveMQ topic and publish to another Topic and read/write/display the object data, but from some research I have done, I am not sure if this is possible.What are some other ways to approach this problem? The android Phone needs to be able to send/receive data. I have been using the AndroidEmulator for testing.
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Sep 30, 2010
I have found that there is a significant lack of documentation of WebView's ability to communicate with Java via WebView.addJavaScript() method. First, the debug document http://developer.android.com/guide/developing/debug-tasks.html#Debugg... appears to no longer work. Second, what object types should we expect when going to and from JavaScript. I have done some trial and error and it appears that complex types can cross the boundary, for example java.util.Vector. However when a Java method returns a byte array to JavaScript it has a type of undefined and I have been unable to coerce it to any other type. Finally, there is great potential with this interface and with some more attention we could go far.
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Jul 26, 2010
In Android 2.1 can we suppress the pairing dialog while exchange data between 2 android devices using bluetooth API. or is there any way that pragmatically we can do this without the user interaction.
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Oct 15, 2010
I'm working on a small application and basically, want I want to do, is to ask for a user confirmation before he performs a given set of phone calls.
So I'm trying to find a way to create a UI when the onReceive() function of my BroadcastReceiver is fired. It seems that I can show an Activity thanks to Context.startActivity(), however, I need to wait for the user to interact with that Activity (by giving its confirmation) before my BroadcastReceiver can continue its processing and I can't seem to find a way to do it...
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Jun 1, 2010
I am currently finding about how to build a XMPP client application on android 2.1.I came across this link which somewhat talks about the same problem.I am a newbie to android dev and thus found the solution given there to be difficult to digest.
The system currently has Active MQ as a JMS provider.My job is to fed the messages coming from JMS to the XMPP server and then develope XMPP client on android 2.1 which will listen and show notification to the events pushed by the server. I have following concerns(which might sound foolish)
1.How do I push the events from JMS to the XMPP server which will in turn push them on android?
2.Which XMPP server implementation I should use?I have 3 options....................
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Jun 16, 2010
Is there any way to make it so my app can set itself as the default Home app without any user interaction?
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Jan 19, 2010
A long press on an EditText brings up a menu of options that the user can select. The only messages or options that I want users of my apps to get, I want to come from me via the app. How do you disable this so that nothing happens when you long press the EditText? What other situations like this should I be aware of?
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Jun 29, 2012
Ive been porting the S3 lockscreen to S2.
Little progress update....
Got the animated circle working with a switch for ripple on/off,weather and live wallpaper lockscreen support.
I just cannot get the ripple interaction when screen locked. When the movement to unlock is made the ripple appears.
Logcat shows the ripple renderer runs when screen is locked and touched but whilst locked the screen does not display the interaction.....
https:[url]......
I think its possibly phonewindowmanager or keyguardmediator which is stopping the screen displaying interaction until the movement to unlock is made. Any process that links what is shown on screen and interaction when locked (for lockscreen music widgets for example which allow interaction when locked)
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Sep 29, 2013
I have been able to achieve WIRELESS display and audio mirroring with my AppRadio!
I just connected my adapter to the HDMI input, powered it via USB and then used the wireless display feature in the phone to connect.
I am using tasker to force landscape and manage screen timeout etc etc.
This is all really awesome but there is one major caveat, the display will mirror but I cannot interact with it through the head unit. How get that to work?
ADAPTER: Netgear Push2TV Wireless Adapter PTV3000-100NAS
APPRADIO: AppRadio 3 (SPH-DA210)
PHONE: VZW, MOTOROLA DROID MAXX
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May 24, 2010
Merely turning your phone on may be enough to prevent it from sleeping. What I'm about to tell you is 100% repeatable. I've done it about ten times now; it has happened every time. I'm running the stock Android 2.1 ROM from Sprint. <Background> When Android boots, it preloads a huge number of apps into RAM. Essentially, it's starting JVM processes and loading the classes of applications without actually executing any of their code. Android does this to reduce the lag you would feel when activating one of these apps. These preloaded apps are said to be EMPTY. There's no real penalty for preloading these apps since they're loaded in the background in otherwise idle CPU cycles and their processes will be terminated as needed to free up RAM for applications you begin using. </Background>
Although it should be impossible, one of those preloaded apps is preventing the Hero from sleeping. By process of elimination, I have found which one it is: Footprints.............
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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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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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Aug 8, 2009
Java packages like Java.io, Java.Lang etc used in android, are they different from Java packages in windows ? means specially made for android ?
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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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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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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;...........
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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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Sep 29, 2009
I was going through the code for Activity.java and ApplicationContext.
Both these classes define many functions of Context Interface. Take for example startActivity.java
Activity Class has its own implementation of startActivity ApplicationContext class also has an implemenetaion of startActivity.
Now there are 2 observations...
CODE:..........
Questions: 1. Who uses ApplicationContext class? 2. Does Activity class ever deal with ApplicationContext class (as given in the javadoc comments of ApplicationContext.java).
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Feb 5, 2014
I am trying to install the ADT Plugin. It is not working.
Tried:
This is after Hello->Install New Software
Name: ADT Plugin
Location: https:[code]....
How do I install ADT Plugin?I am using Java 6 instead of Java 7 per recommendation of posts elsewhere. It didn't work.
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Sep 2, 2010
Want to know if there is an app to run Java on my HTC EVO.
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Sep 18, 2010
I know there are plenty of tutorials about integrating C++ into Java, but whats about the other way around, a Bridge from Java to C++?
The reason i'm asking this is Android.
Every C++ developer who wanted to write applications for the android noticed at some point that there is no serious (mature) C++ api for android (infact, android is lacking an implementation of the STL).
The only API that is mature enough to write android applications in, is Java. So instead of writing an api from scratch, wouldn't it be possible to use the Java Classes from C++?
I know that this sounds merely like an unrealistic dream, but that way most C++ developers weren't forced to learn a new Language.
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Aug 30, 2010
I've seen this question asked many times but none of the answers really made sense in what I'm doing... I have an android game (see source at Google source control: http://code.google.com/p/bestcardgameever-android/source/browse/#svn/...) It's a card game, and I've used a method that redraws each hand every round - that might be wasteful but I couldn't think of a better way to do it. Code...
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Feb 20, 2009
I can debug the Android Java code using eclipse and using the Remote Java Application debug configuration. This does not step into C/C++ code however as expected. I understand I have to attach the gdbserver to do this. Can someone provide a step by step tutorial on how to debug the native code of Android?Is there a eclipse plugin that makes this easier?
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Sep 27, 2010
How can I add a layout to another layout in java? In xml, you can do it with include. How can you do it in Java without the help of XML? (I need to know this because the number if includes changes dynamically).
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Jul 11, 2010
The API I need to work with does not support xpath, which is a bit of a headache! The xml I want to parse is as a String. My questions: Is there a Java equivalent of "simplexml_load_string", where it makes the string into an xml document for parsing? Which is better for parsing, SAX or DOM? I need to get a couple of values out of the XML and the structure isn't that deep. [3 levels]
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Oct 5, 2010
I wanted to use the ApiDemos in the SDK samples but I have a problem in finding the R.java file, I don't know why is it missing.
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Dec 19, 2009
When i started learning android i learned that R.java files goes to /gen folder recently i saw it on /src file (in WROX-Professional Android App Dev- sample code downloads). How does this work and also in some code i saw (xml layout) android:id="@+id/R.id.someName"(i don't remember in which web page i saw this code) I don't understand this, can somebody help me with this.
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Nov 5, 2010
We are implementing a sever-client architecture and some of the client apps are supposed to run on android OS. The first idea that came to mind was to use Java RMI, but the RMI api is obviously not implemented for android.So
1) Is there a way to use the Java RMI api in an android application? Can I just import it from the standard java library?
2) What are the possible substitutes for RMI which will work for both android and desktop applications?
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Aug 25, 2010
I am learning Android development, specifically to eventually do OpengL 2.0 ES on it. So far I have read that the NDK supports Opengl 2.0 ES. However, is there also a Java API for it? If there is a Java API for it, which one is recommended? I know both C++ and Java, so it is not a big deal if I have to use the NDK, but I would prefer to work only in Java if possible and without a big performance hit.
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Jul 23, 2009
I've been working on a project for several weeks now, and just tonight I started having a problem. The R.java file is no longer being generated. I've attempted to clean the project (the first time I do this it removes the R.java file but doesn't regenerate it) and have tried uninstalling and reinstalling the SDK. I've also tried resetting adb to no avail.
This problem does not occur in my other Android projects. They clean just fine and regenerate the R.java file like nothing is wrong. This particular project is the only one suffering from this problem.
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