Develop Reference

Trying to use code from another project by including it in my build path

I'm trying to figure out a way to share code across projets. this is what i did
created a project called sharecode and made the following class
package codelib.com;
public class cShape {
}
made a android project called testsharecode
whent to properties->java build path and clicked on projects at the top.
clicked add, and added sharecode
created a class to try include the cShape class from the sharecode project
package com.example.testsharecode;
import codelib.com
public class parent {
cShape test;
}
On my import i get a error saying
"only a type can be imported, cadelib resolves to a package"
on cShape i get a error saying the def does not exist.
How can project testsharecode use the code in projetc sharecode?

have you tried the following method :
right click on the distination projet, Build Path -> configure build path
chose project then select testsharecode
back in your distiation project now you should be able to use your public classes.
hope this helps

Could not find class XXX referenced from method XXX.<YYY>

I'm working on a libGDX project and I have a class called CheerVArachnids that has another inline class which is an event listener. When I run this project on the desktop it works fine. BUT when I run on my Android device, it can't find that inline class and I get the following error:
Could not find class 'com.bbj.cva.CheerVArachnids$PlaceUnitListener', referenced from method com.bbj.cva.CheerVArachnids.<init>
Here are the important parts of my class:
package com.bbj.cva;
public class CheerVArachnids implements ApplicationListener {
class PlaceUnitListener implements EventSubscriber<PlaceUnitEvent> {
#Override
public void onEvent(PlaceUnitEvent event)
{
//
}
}
public CheerVArachnids() {
EventBus.subscribe(PlaceUnitEvent.class, new PlaceUnitListener());
EventBus.subscribe(RemoveScreenObjectEvent.class,
new RemoveScreenObjectListener());
}
}
Any ideas why on Android, at runtime it can't find that inline class?

Since some ADT-Version you have to set which libraries / projects should be exported too.
Project-Propiertes -> Java Build Path -> Order and Export -> Check your Sources and other Libraries you are using.
Do these Export-Settings for your Core- and Android-Project.
Then it should work fine on Android.

In my case, everything worked fine until I installed the new updates for the SDK and Eclipse.
I got an error: "Could not find class..."
I found solution in another stackoverflow site.
I have a similar problem when using external jar (in my case openCSV). The reason I had a problem was due to a change in ADT 17 (or above). What I needed to do to resolve the problem was
In Eclipse go to Properties -> Java build path -> Order and export.
Mark my jar.
Move jar to top of the list.
The solution was found in the following page which reference to a very good article.

First you should: import XXX(Class).java,
If you added external library jar file import them to the LIB folder.
After that:
Right Click to your Project -> Properties -> Java Build Path -> Order and Export(tab) -> select All -> press OK -> Clean your Project.
Hope this solve this issue

Error in Android projects (in Eclipse) without a reason

I have a problem with the Android projects in Eclipse.
I am working on Mac OS Lion and when I went to continue an Android project it gives me an error on the project icon. Moreover when I went to see the error Eclipse does not gives me an error anywhere in code.
What can I do to solve this problem? Any suggestions?
Thanks!
After a lot of work I have this problem now:
Eclipse it gives me error on override methods of class preference activity. for example for the code below:
#Override
public boolean onPreferenceClick(Preference preference) {
// TODO Auto-generated method stub
AlertDialog.Builder builder = new AlertDialog.Builder(view.getContext());
builder.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// Show something if does not exit the app
dialog.dismiss();
}
});
}
I get the error: The method onPreferenceClick(Preference) of type new Preference.OnPreferenceClickListener(){} must override a superclass method
This problem is only on Mac OS X Lion. I don't know where is the problem. All tools are installed.
On windows is just fine on the other hand.
Do you have any idea where is the problem now ?

The common reason is a error in project. Recheck references for all jars and path to android-sdk

Try doing a Project --> Clean and see if that helps. Restart Eclipse too.
Ensure that you have installed all of the necessary SDKs/APIs in the Android SDK Manager. Perhaps the reason it works on your Windows machine but not your Mac is because your Mac does not have the necessary SDKs installed to ensure that your application compiles/builds.
Also, please post the errors that Eclipse is giving you... if you want others to help you solve the problem, I suggest you improve the quality of your question :).

Facebook Android SDK source will not compile with Eclipse Indigo

After finally getting the Android Facebook SDK to properly import thanks to this, I found that eclipse does not recognize the override of onclick in FbDialog.java:
mCrossImage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mListener.onCancel();
FbDialog.this.dismiss();
}
});
Nor does it recognize the overrides of onServiceConnected and onServiceDisconnected in the TokenRefreshServiceConnection implementation of ServiceConnection
#Override
public void onServiceConnected(ComponentName className, IBinder service) {
messageSender = new Messenger(service);
refreshToken();
}
#Override
public void onServiceDisconnected(ComponentName arg) {
serviceListener.onError(new Error("Service disconnected"));
// We returned an error so there's no point in
// keeping the binding open.
mAuthActivity.unbindService(TokenRefreshServiceConnection.this);
}
All three methods say, in the warning, that the method must override a superclass method. I have not modified the code at all yet. I checked that Eclipse recognizes the types as the same ones in the respective superclasses, and I have tried pressing control-shift-o to organize the imports, which was a fix suggested in this answer for a similar problem.
These overrides are part of the SDK, not any separate project. I set up the project to use Android SDK 2.2 as was shown on Facebook's instructions, and 4.0.3, which should be, theoretically, compatible with all previous versions. I have yet to get Facebook's own code to work. As a side note, is there a jar I can use instead? It would make this much easier.

Guessing your Project Properties -> Java Compiler Compiler compliance level is set to 1.5, not 1.6 (or higher).
Change this.
Why is javac failing on #Override annotation

The lazy, fast and easy fix is to remove the #Override annotations. The correct fix is to check that the project compiles to Java 1.5 or above, to use "fix project properties" from Eclipse, and possibly to check that the Facebook library project uses the same Android SDK for compiling against, as your project.

Importing projects

I had many Android projects that were working fine in my old pc. now, when I tried to re import them, they are not running. Problem is that onClickListener is not working. Wherever there is onClick method, it throws an Error:
The method onClick(View) of type new View.OnClickListener(){} must override a superclass method
My actual method is :
myBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//my code
}
});
What would be the problem?In every project wherever there is onClick method it shows the same.

Using my supehuman guessing powers I assume that you are using eclipse. Eclipse projects are not portable between machines as they contain absolute paths ( but that does not stop developers from checking them in into source control system ).
Your options are:
recreate eclipse project from sources
create maven build with android plugin and make it create you an fresh eclipse project
spring 150 bucks and buy you license for IntelliJ IDEA ( or just use free community edition which also has android plugins )

simply remove all #Override annotation above the onClick() methods

Goto project menu and clean the project.

Option 1: Simply remove all #Override
Option 2: In Eclipse -> Window -> Preferences -> Java -> Compiler, set "Compiler compliance level" to 1.6 or higher.