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build library ZXing for android project

hi i want to make QR code scanner to my android app using ZXing library
i already success try it with "Scanning via Intent" method before
now i try different approach
my problem is i always get this error
my step
1. download zxing master from here
2. download jar from repository here
3. import ‘android’ folder from zxing-master in eclipse
4. create libs folder and copy core.jar in there
5. right click in CaptureActivity - properties - java build path - library tab - add core.jar path
i don't know why i still get error after add jar path...
i already try clean project, swith workspace, using latest jar file but still same
any idea?
#update #Nickolai Astashonok
eclipse error
'<>' operator is not allowed for source level below 1.7
i try to change java compiler using 1.7 (default 1.6) by
right click project - properties - java compiler tab
but it's seem my target API not fullfil requirment (my API 15)
how to use ZXing in java compiler 1.6?
Update #Sean Owen
when i changed using java compiler level 1.7 and clean project it's says
Using 1.7 requires compiling with Android 4.4 (KitKat); currently using API 15
i wanna target my aplication runs for ICS (API 15)
i'm not sure if in 'captureActivity androidManifest using minSDK 19' and 'myProject androidManifest using minSDK 15 will be running well
so i guess i better stick with java compiler 1.6
meanwhile i found this link
based on that link i need to use zxing library version 4.5.1 (java compiler 1.6)
because version above using java compiler 1.7
but i can't find any download link to 'zxing library version 4.5.1'

Your question is not clear, but I think the answer is this: the source code indeed requires Java 7. You simply need to set your IDE project to use Java 7. The supplied Maven build already works correctly in this regard. It is not true that API 15 or any other Android API needs Java 6.

I found 4.5.1 but I don't know how to download it! if you figured it out let me know too please.
https://code.google.com/p/zxing/source/browse/?r=2927#svn%2Ftrunk%2Fandroid

I got the same issue and I solve this by doing:
change the java compiler to 1.7 (like what Nickolai Astashonok suggested)
change the target version to 19 (Android 4.4)
Clean the project again, you will see lots of errors removed but there is still some errors related to missing of CameraConfigurationUtils.java
Please go to below link to download and copy the file into your project as per the path suggested.
https://github.com/zxing/zxing/blob/master/android-core/src/main/java/com/google/zxing/client/android/camera/CameraConfigurationUtils.java
Clean the project again, you should be able to clear all the errors and use the sample application in the 'android' folder.

android <uses-sdk> does not update

Using Eclipse, I was using android:minSdkVersion="10", got the error message that this was too low, and updated it to 18. After cleaning the project, refreshing and building Android Environment, I still get the same error message!
In Properties -> Android -> Project Build Target, I have selected Android 4.4.2, with an API level of 19.
in AndroidManifest.xml:
<uses-sdk android:minSdkVersion="18" android:targetSdkVersion="19"/>
ERROR:
"Call requires API level 17(current min is10):android.app.AlertDialog.Builder#setOnDismissListener"
How do I make sure my update in AndroidManifest really works?
Thanks in advance.

It has been a while since I've used Eclipse for Android development. If you're new to Android, I'd highly recommend that you check out Android Studio, instead.
Anyway, this sounds like a build issue. I'm imagining that you're using the default ant build script so in that case the most likely culprit is your project properties file.
Look for a file called "project.properties"
and add/modify a line to contain the following:
# Project target
target=android-18
It sounds like it's currently pointing to android-10. You can find more information on this file and others here.

Android samples - Accelerometer and APIDemos do not build

I am new to Android development. I have succesfully installed eclipse with Android Developer Tool plugin and many of the samples work fine.
But Android samples - Accelerometer and APIDemos do not build. I see many build errors notifying to fix the errors in code. I dont think Google has released APIDemo sample with build errors.
Thanks in advance, please advice how to fix these errors, or if any configuration/setting is required.
I have set the Java compiler compliance level to 1.6.
Error information(for acceralometer sample):
The project contains error(s) in application. Please fix them before running
Error details:
The method onAccuracyChanged(Sensor, int) of type AccelerometerPlayActivity.SimulationView must override a superclass method
AccelerometerPlayActivity.java /AccelerometerPlay/src/com/example/android/accelerometerplay line 456
Java Problem
Call requires API level 8 (current min is 5):
android.view.Display#getRotation AccelerometerPlayActivity.java /AccelerometerPlay/src/com/example/android/accelerometerplay
line 389 Android Lint Problem
Regards,
Jai

Look for the line androidminSdkVersion ="5" in your android.manifest file
and change its value from 5 to 8 or anything more than 8
Alternative is
Go to project properties by right clicking on you project,
thereafter look for Android in properties.
You have to select the build target here equivalent to the api for which it the sample project is build for
Refer Image
Say if you are using the sample from folder android-12 then you have to check the same option(ie API Level 12) here in properties

A possible reason can be a slow PC, which does not build in time. Then errors occur due to absence of R.java
In that case (errors are with something like R.id.stuff), build the project and wait.

I found the fix myself!
Earlier I tried with Andriod version 4.0. Now I just tried ApiDemos sample with Android version 4.1.2. It worked fine. I also deployed the apk in my mobile. It just works fine.

Libgdx setup UI gives 2 unexpected errors in new GWT project

I have run the setup ui, however, I get two different errors in the -html project than what is described in the tutorial: libgdx tutorial
The tutorial error stated is as follows (which is an error I do not see):
To fix the error of the HTML5/GWT project, go to the "Problems" view, right click the error message "The GWT SDK JAR gwt-servlet.jar is missing in the WEB-INF/lib directory" and select "Quick Fix". Click "Finish".
The errors I have are:
The project was not built since its build path is incomplete. Cannot find the class file for com.google.gwt.core.client.EntryPoint. Fix the build path then try building this project ...
The type com.google.gwt.core.client.EntryPoint cannot be resolved. It is indirectly referenced from required .class files
Is there anyway i can fix this? I just updated my eclipse, I also downloaded Version 18 ADT, revision 19 for Android SDK Tools, and revision 11 for Android SDK Platform-tools.

I had the same problem a couple of weeks ago and got around it by installing the GWT SDK.

I know that the post is old, but while the answer of #Rod was close to resolve my problem, it didn't fully. After installing the plugin in his answer I got 3 error messages instead of two: the same previous ones and a new one.
Looking inside the class that was giving the problem made Eclipse to point straight to the problem: the compiler compliance required to be 1.5 or greater but Eclipse had by default 1.4. I changed it through Window > Preferences > Java > Compiler > Compiler compliance level, where I put the correct one, 1.7, and everything compiled cleanly.
PS: Thanks #Rod

use the http://dl.google.com/eclipse/plugin/4.2 to install plugin on eclipse
instead of http://dl.google.com/eclipse/plugin/4.4 or 4.3

ActionBarSherlock not working in eclipse

I have been trying to get ActionBarSherlock ( http://www.actionbarsherlock.com ) working with my eclipse projects. I added ABS into a new project with target version 3.2, and this created fine. When I try to add this as a library to my other project (min version 2.1, target 3.2), I get errors such as
G:\EclipseWorkspace\Android\ActionBarSherlock2\res\values-v11\abs__styles.xml:65: error: Error: No resource found that matches the given name: attr 'android:windowActionModeOverlay'
basically, none of the xml attributes found in 3.0 or higher are recognised. As a consequence, R.java does not generate.
Am I doing anything wrong?

You need to compile with Android 3.2 in addition to targeting at least API 11 both in your app and for the library.
In eclipse, right click on the project and go to "Properties". Under the "Android" tab you'll need to select Android 3.2.

Eclipse is giving me strange Errors too, when implementing external libraries. What always helped for me after some tries:
try multiple times:
*rightclick on your project => Source => Clean Up
*delete and readd the library project
*restart eclipse several
you might also try to delete the generated files to force it to regenerate, but do this on your own risk :)
have fun w/ the open source libraries :)

Try upgrading the version of the sdk and target version 2.1:
<uses-sdk android:minSdkVersion="7" android:targetSdkVersion="15"/>
This will allow using last sdk features and the app will work on version 2.1.
Maybe, you'll see issues even after fixing this. Then you can clean the project.