Android :: How To Reference R.java Of Other Apps In Android - Like Com.android.music
Sep 29, 2010
I am trying to develop an app to supplement the built-in music player. I've used git to download the com.android.music package and looked around at its code. I can launch the music player by copying some of its code and launching activities with intents.
Now what I need to do is get a handle to its current view. In the MusicUtils.java file, I see a line that says
View nowPlayingView = a.findViewById(R.id.nowplaying);
I'd like to do the same thing. Only I don't have access to the R.java file, so I can't write e.g. R.id.nowplaying. How do I do this? How do I reference the music players R.java? I do know the R.java stuff is declared public so that shouldn't be a problem. Right?
Is it even possible? I saw this related question and am now wondering: http://stackoverflow.com/questions/2437271/how-to-load-com-android-music-code-into-eclipse-and-compile
I'm working against the Android 2.2 SDK, but it'd be helpful to know if the answer is different for older versions such as 1.5.
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Mar 9, 2009
In my layout xml, I have: <TabHost android:id="@+id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent">
<TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content"/>
</TabHost>
My question is how can I get a reference to TabWidget object. I tried this: mTabWidget = (TabWidget) findViewById(com.android.internal.R.id.tabs); but this won't compile since 'com.android.internal.R is not visible. And then I try change the id to android:id="@+id/tabs" but I get a run time error saying: "Your TabHost must have a TabWidget whose id attribute is 'android.R.id.tabs'"
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Aug 16, 2010
Trying to assign a key to each field in android to reference in Java.
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Sep 29, 2010
I thought when you passed objects to methods in Java, they were supposed to be by value.
public class MyClass{
int mRows;
int mCols;
Tile mTiles[][]; //Custom class
//Constructor
public MyClass(Tile[][] tiles, int rows, int cols) {..........
At this point, any changes to the mTiles object are reflected back to the tiles object.
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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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Jan 9, 2010
I would like to know whats some free ringer apps? browser apps? fb apps? music apps? and theme apps?
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Oct 16, 2009
I know Java apps can be run in Android. But what I want to know is this: I have a perfectly normal Java app and I want to port it to an android platform. What changes would I need to do to my app in terms of GUI and other code to make it usable in Android? I know Android uses XML file to control the look and feel of its app. So would I need to change my GUI completely? I just want to know the general overview of how porting may be done. If anyone could point me to right resources, that would be great. Also, for your info I'm a newbie to developing android app.
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Apr 2, 2010
In an Android app I have a utility class that I use to parse strings for 2 regEx's. I compile the 2 patterns in a static initializer so they only get compiled once, then activities can use the parsing methods statically.
This works fine except that the first time the class is accessed and loaded, and the static initializer compiles the pattern, the UI hangs for close to a MINUTE while it compiles the pattern! After the first time, it flies on all subsequent calls to parseString().
My regEx that I am using is rather large - 847 characters, but in a normal java webapp this is lightning fast. I am testing this so far only in the emulator with a 1.5 AVD.
Could this just be an emulator issue or is there some other reason that this pattern is taking so long to compile?
CODE:.......................
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Sep 21, 2010
Apart from knowing a bit of C, I have no experience in software development.I want to know from where to start learning to build android applications apart from learning java? What are the steps?
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Sep 10, 2010
Possible Duplicate:
Alternatives to Java for Android development?
I want to make apps for Android (Mobile OS) what other language(s) can i make them in EXCEPT java?
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Jun 24, 2010
How to import/compile and deploy existing Java (standard edition - 1.5+ ) apps into the Android platform? Or would generating a project from scratch and importing the classes incrementally into the project from the existing project the best way?
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Sep 10, 2010
I'd like to start creating Android apps but I don't like Java. I read that scala can be used to do it. Are there another option?(Clojure?) I'm a Python/Django developer so it would be great to learn a pretty different language.
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Nov 17, 2010
I'm looking for apps which allow me to make music. Preferably something which does not just make crappy loops. Something with a staff or matrix would be nice.
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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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Jul 20, 2010
I've noticed that the stock music app's random feature has no regard for repeating songs. Sometimes I'll hear the same song 2-3 times in one hour! Are there any music apps that will randomize a playlist without playing any songs more than once? Sorry, I kind of reposted this Evo thread, thought it might get more exposure in the apps forum: "Random" music not random
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Jun 24, 2010
Does anyone know of any good music making apps for android? This is one thing I miss about my iPhone, there are a lot of very powerful music creation apps available. Anyone who's used Beat maker knows what Im talking about. So any suggestions guys?
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Nov 25, 2009
I haven't seen much about music apps for Android. I just saw a video of NESynth for iPhone. Is there anything similar on Android. I hope there will be.
I have Musical, Synthesizer and Rock Out. They are ok apps for free. I'd pay for NESynth though.
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Mar 1, 2009
To be plain, the android / xml widget reference material is poor at best.Rather than approaching the controls from an xml point of view, its all driven from a class point of view, which is clunky when you want to figure out how to build a good xml UI.Is there any decent documentation with design in mind (tag names, attribute names, etc) or is it just figure it out and struggle through the best you can? I'm on my 2nd android app and losing patience with hunting and pecking for the correct attributes / tags.
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Jul 15, 2010
Is there one? I have "Professional Android 2 Application Development" by Meier and "Teach Yourself Android Application Development in 24 Hours" by Darcy/Conder. Both are mediocre at best. Neither is a decent REFERENCE, but rather they are basically structured as tutorials, without nothing in the way of reasonably comprehensive API documentation (which also, BTW, is woefully inadequate on the android.com site). And no sort of in-depth discussion of the structure of the system, so one could perhaps understand it rather than simply using the (inadequate) cookbooks.
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Aug 31, 2009
Is there any sort of xml reference?
I found this which turned out to be invaluable for me http://groups.google.com/group/android-developers/msg/d334017d72909c79
but I can't figure out how I was supposed to know how to do that, had I not found that post.
I know that the api reference has xml attributes listed for many of the classes... but what about xml tags? Where is it documented that I could build a shape using <padding>, <corners>, <solid> tags?
I'd really like to know where I can find such documentation.
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Oct 19, 2010
I want to write an application that will log down whatever I type using the Android keyboard.
The purpose is to have a backup of all the keyboard entries.
Is it possible?
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Feb 9, 2010
I've seen a couple of apps that make using the stock music player better, enough so that i quit using meridian and went back to the stock one, even though i really like meridian's gesture control. anyone else want to share others they've found/used/liked?
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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 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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Oct 28, 2009
I have a custom view that needs a reference to the activity that created it.Dianne Hackborn said in another thread: >Give your view a reference to the activity (or a Java interface it implements) and call back through that. >Much much MUCH more efficient than sending a broadcast. >See all of the standard view and view subclass callbacks for examples.
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Apr 28, 2009
How i can get a reference to the digital keyboard? is the keyboard added to the activity? how i can set a other style to the keyboard? Where i get a documentation of the digital keyboard?
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Aug 25, 2010
I have a jar that I need to reference from my Android project. I also have the src of the jar, so I could include it in the project itself. I was wondering if referencing a jar vs. compiling it in with the project using Dalvik makes any difference in terms of final Dalvik package size that gets generated.
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Jul 29, 2010
I have an object that is used for calling callback functions ----- static jobject o;
I have assigned the callback function to that object through a pointer, env -----
o=env->NewGlobalRef(callback);
The same pointer, env, points towards the function CallVoidMethod( ) that uses JNI to reach to the java code.
env->CallVoidMethod(o, methodId, pDeviceId, deviceStatus, statusReason, connectionProgressInfo);
However on calling this function, the system is getting crashed, and VM says that it's an invalid reference to static jobject o and then it crashes.
My code is as follows :
CODE:..........................
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Nov 3, 2010
Object getThisObjName= new Object();
I'd like to get the name of an object reference.
Is this possible via reflection in Android?
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