Android™ Application Development - Bahar Ali Khan

Chapter 11: Advanced Android Development
358
}
}
out.writeDouble(location.getLatitude());
out.writeDouble(location.getLongitude());
out.writeString(link);
public static final Parcelable.Creator CREATOR =
new Parcelable.Creator() {
public Quake createFromParcel(Parcel in) {
return new Quake(in);
}
public Quake[] newArray(int size) {
return new Quake[size];
}
};
public int describeContents() {
return 0;
}
Now that you’ve got a Parcelable class, you need to create an AIDL defi nition to make it available when
defi ning your Service’s AIDL interface.
The following code snippet shows the contents of the Quake.aidl fi le you need to create for the Quake
class defi ned above:
package com.paad.earthquake;
parcelable Quake;
Remember that when you’re passing class objects between processes, the client process must understand
the defi nition of the object being passed.
Creating the AIDL Defi nition
In this section, you will be defi ning a new AIDL interface defi nition for a Service you’d like to use
across processes.
Start by creating a new .aidl fi le within your project. This will defi ne the methods and fi elds to include
in an Interface that your Service will implement.
The syntax for creating AIDL defi nitions is similar to that used for standard Java interface defi nitions.
Start by specifying a fully qualifi ed package name, then import all the packages required. Unlike
normal Java interfaces, AIDL defi nitions need to import packages for any class or interface that isn’t a
native Java type even if it’s defi ned in the same project.
Defi ne a new interface, adding the properties and methods you want to make available.