i am working on one of C++ Application, where i need to interface with Android Source Code, i got this Source Code from below URL
https://github.com/android
Now When i am Compiling my application which uses Camera module, then it has many dependencies like utils,binder,gui,system. by this way i am including every header files which camera module of Android depends depends on.
but i am stuck with following error:
In file included from jni/headers/camera/ICamera.h:22:0,
from jni/headers/MyCamera.h:4,
from jni/headers/VideoWrapper.h:4,
from jni/src/com_example_jnitest_VideoJava.cpp:2
jni/headers/binder/Parcel.h:31:7: error: template argument
required for 'class Flattenable'
class Flattenable;
^
jni/headers/binder/Parcel.h:105:37: error: invalid use of
template-name 'android::Flattenable' without an argument list
status_t write(const Flattenable& val);
^
jni/headers/binder/Parcel.h:160:30: error: 'Flattenable' is not a type
status_t read(F
my Question is:How to get out of this error??
Whenever Any class Template need to be pre-declaration in another class or Anywhere then we need to give it with template
e.g:
in Parcel.h file of Android source, pre-declaration of class Flattenable is done as below:
class Flattenable;
but actually it should be:
template <typename T> class Flattenable;
because class Flattenable is Template class.
However i Amazed how this things not taken care into Android Source Code..!!
Related
I developed a Android Binding Library to bind a printer Android AAR file (The AAR has its build action set to LibraryProjectZip), and the project is compiled using Android 7.1, using class-parse android class parser, and AndroidCodeGen Target: XAJavaInterop1. I can provide the simple Project in order to have full access to the code and library.
But I have the following error: 'The type or namespace 'ILibrary' does not exist in the namespace 'Com.Sun.Jna' at Com.Sun.Jna.Native.cs. So I decided to check at the Android library using a decompiler and here is what I found:
The AAR file contains an interface 'Library' (not ILibrary), and the Native.class file contains a method whose signature is the following and is the source of the error and which requires a Library object as input
public static Library synchronizeLibrary(final Library library){...}
The C# generated code contains a Com.Sun.Jna.ILibrary.cs file which contains a public abstract class 'Library':
[Register ("com/sun/jna/Library", DoNotGenerateAcw=true)] public abstract class Library : Java.Lang.Object {...}
but the generated Native.cs file has the counterpart method SynchronizeLibrary :
// Metadata.xml XPath method reference: [Register ("synchronizedLibrary", "(Lcom/sun/jna/Library;)Lcom/sun/jna/Library;", "")] public static unsafe global::Com.Sun.Jna.ILibrary SynchronizedLibrary(global::Com.Sun.Jna.ILibrary library) {...}
I do not understand why the C# generated method SynchronizedLibrary demands an ILibrary and not the Library.
I tried to modify the Metadata.xml file to rename the class Library to ILibrary but with no success. Moreover I have a warning saying that:
class-parse: warning: could not load .jar entry 'libjnidispatch.jnilib': System.Argument.OutOfRangeException,
I tried to change the name of the interface from Library to ILibrary using <attr path="/api/package[#name='com.sun.jna']/class[#name='Library']" name="managedName">ILibrary</attr> but the definition of the interface does not change. It is strange that I have a reference path for the members of the interface but not the interface itself
[Register ("com/sun/jna/Library", DoNotGenerateAcw=true)]
public abstract class Library : Java.Lang.Object {
internal Library ()
{
}
// Metadata.xml XPath field reference: path="/api/package[#name='com.sun.jna']/interface[#name='Library']/field[#name='OPTION_ALLOW_OBJECTS']"
[Register ("OPTION_ALLOW_OBJECTS")]
public const string OptionAllowObjects = (string) "allow-objects";,
and I do not know if it is related to the prior problem.
Thank you for any suggestion
Finally, I found the way to correct the error by modifying the name of the interfaces by adding the following lines to the Metadata file:
<attr path="/api/package[#name='com.sun.jna']/interface[#name='Library']" name="name">ILibrary</attr>
But now I have errors telling me that JNIENv does not contain method like NewString. And I am wondering if it is related to the warning i have telling me that It cannot load .jar entry libjnidispatch.jnilib
Any ideas, thanks
I have an .aar third party library that I want to use in Xamarin Android. So I created a new Android Bindings Library, added the aar-library and changed the Build action of the aar file to LibraryProjectZip like described here: https://learn.microsoft.com/en-us/xamarin/android/platform/binding-java-library/binding-an-aar
Nothing else was changed and I would expect the project to compile and generate a dll file.
Instead I get a lot of errors saying Error CS0542 'xy': member names cannot be the same as their enclosing type.
When I jump to the origin of the error, I find the errors in generated code by Visual Studio with the classes looking something like:
public abstract class Albumin : Java.Lang.Object {
internal Albumin ()
{
}
// (removed for readability)
[Register ("ALBUMIN")]
public const string Albumin = (string) "albumin";
I cannot modify the source code of the library.
What can I do in order to build the Binding Library successfully?
Thank you very much #Leo Zhu for the answer in the comments:
The solution is Renaming Members.
So in my case the Metadata.xml in die Binings Library would look like the following:
<attr path="/api/package[#name='com.company.android.sdk.dataclass']/interface[#name='DataClass.Albumin']/field[#name='ALBUMIN']" name="name">ALBUMIN_Binding</attr>
I am trying to extend android.hardware.audio#2.0::IDevicesFactory to add a new Audio HAL.
So I copied whole 2.0 folder into 2.1 folder, and attempted to extend interface. This is my new IDevicesFactory.hal file:
package android.hardware.audio#2.1;
import android.hardware.audio#2.0::types;
import android.hardware.audio#2.0::IDevicesFactory;
import android.hardware.audio.common#2.0;
import IDevice;
interface IDevicesFactory EXTENDS android.hardware.audio#2.0::IDevicesFactory {
typedef android.hardware.audio#2.0::Result Result;
enum Device : int32_t {
PRIMARY,
A2DP,
USB,
R_SUBMIX,
STUB,
MY_HAL
};
};
[Removed code commentary for readability]
I only wish to add MY_HAL into that enum.
I don't know if I need to extend all interfaces, but I will do that. I will also modify all sources in my 2.1 folder to use #2.1 HIDL (namespaces and types etc).
I tried running hardware/interfaces/update-makefiles.sh and it throws following error:
gps#gps-HP-280-G3-MT:~/andsrc/android-8.0.0_r12$ hardware/interfaces/update-makefiles.sh
Updating makefiles for android.hardware in hardware/interfaces.
Updating android.hardware.audio#2.0
Updating android.hardware.audio#2.1
ERROR: syntax error at hardware/interfaces/audio/2.1/IDevicesFactory.hal:8.27-33
ERROR: syntax error at hardware/interfaces/audio/2.1/IDevicesFactory.hal:19.2
ERROR: Could not parse android.hardware.audio#2.1::IDevicesFactory. Aborting.
I do not understand why is there a Syntax error. Can someone guide me what I missed?
I found my issue.
I misinterpreted the grammar for HIDL, and used upper case EXTENDS instead of lower case extends
I would like to use the Scala (2.11) reflection package's runtime mirror in a Scala application compiled for android which is being build using Scala on android.
I was able to fiddle with ProGuard options in order to make it include the required Scala classes. However when I try to get a mirror instance:
universe.runtimeMirror(this.getClass.getClassLoader)
(Indeed it fails during the lazy computation of universe)
The application crashes in run time:
java.lang.NoClassDefFoundError: Failed resolution of: Ljava/rmi/Remote;
at scala.reflect.internal.Definitions$DefinitionsClass.RemoteInterfaceClass$lzycompute(Definitions.scala:370)
at scala.reflect.internal.Definitions$DefinitionsClass.RemoteInterfaceClass(D efinitions.scala:370)
at scala.reflect.runtime.JavaUniverseForce$class.force(JavaUniverseForce.scal a:255)
at scala.reflect.runtime.JavaUniverse.force(JavaUniverse.scala:16)
at scala.reflect.runtime.JavaUniverse.init(JavaUniverse.scala:147)
at scala.reflect.runtime.JavaUniverse.<init>(JavaUniverse.scala:78)
at scala.reflect.runtime.package$.universe$lzycompute(package.scala:17)
at scala.reflect.runtime.package$.universe(package.scala:17)
This crash is for me as expected as it isn't:
It is expected as java.rmi is not part of the Android API and I should expect any code trying to load its classes to crash.
It is unexpected as I didn't know that Scala's reflect package used java.rmi
I have traced the code to were rmi is required, that is to JavaUniverse (a trait mixed in JavaUniverse class) force method:
...
definitions.RemoteInterfaceClass
...
Which leads to DefinitionsClass:
lazy val RemoteInterfaceClass = requiredClass[java.rmi.Remote]
Am I wrong to think that this is a no-go for Scala reflection in Android?
If I am, what could be a workaround to this problem?
To summarize your solution and a related solution, it is sufficient to add two files, and modify build.sbt to include:
dexAdditionalParams in Android += "--core-library"
Add java/rmi/Remote.java to your project with the content:
package java.rmi;
public interface Remote {}
Add java/rmi/RemoteException.java to your project with the content:
package java.rmi;
public interface RemoteException {}
Iam trying to bind a jar(zubhium sdk jar) file to my mono droid project. I have followed their guide on xamarins website and created a new binding project which I reference I my mono droid project.
I am having some issues with package names. I get the following error:
Error 3 package com.zubhium.interfaces does not exist
com.zubhium.interfaces.ZubhiumListener
C:\Users\jbp\Desktop\ny\CmsApp.Droid\obj\Debug\android\src\mono\com\zubhium\interfaces\ZubhiumListenerImplementor.java 8 25 CmsApp.Droid
from the genrated source:
package mono.com.zubhium.interfaces;
public class ZubhiumListenerImplementor
extends java.lang.Object
implements
mono.android.IGCUserPeer,
com.zubhium.interfaces.ZubhiumListener
And that is because when the project is wrapped it automaticly adds mono(.com.zubhium....) to the package name. I cant find how to remove this mono or if i can set a rule to add this part.
I tried to put <attr path="/api/package[#name='com.zubhium.interfaces']" name="managedName">mono.com.zubhium.interfaces</attr>
in the xmldata.xml file but that did not work.
Do you guys have any sugestions?
Regards
package com.zubhium.interfaces does not exist
When you bind a .jar library and reference the binding project from another project, you need to also add the .jar to your Application project and set its Build action to AndroidJavaLibrary.
Failure to do so means that the .jar won't be added to the javac $CLASSPATH, resulting in javac compilation errors when compiling the Android Callable Wrapper (as you saw), and that the .jar won't included into your final .apk. Both of these are Bad™.
And that is because when the project is wrapped it automaticly adds mono(.com.zubhium....) to the package name.
That's for an "Implementor" type; you can ignore it. It's used as part of the implementation of events. If you look at the generated C# code, there should be:
[global::Android.Runtime.Register ("mono/com/zubhium/interfaces/ZubhiumListenerImplementor")]
internal sealed class ZubhiumListenerImplementor : Java.Lang.Object, IZubhiumListener {
// ...
}
The mono.com.zubhium.interfaces.ZubhiumListenerImplementor is the ACW for the internal ZubhiumListenerImplementor type.
You can't rename this type; it's an internal construct that isn't controlled via metadata.