Steps to Implement the Parcelable over AIDL: Here I am giving some steps to implement the Parcelable.
Step1 : Create a different .aidl file that will be used for define the Student class (Parcelable class).
(Student.aidl)
package com.aidl;
parcelable Student;
we write this because aidl can detect Student class.
Step 2: Define the class as Parcelable by Implement the Parcelable.
(Student.java)
package com.aidl;
import android.os.Parcel;
import android.os.Parcelable;
public class Student implements Parcelable {
public String name;
public String father_name;
public Student(Parcel source)
{
name = source.readString();
father_name = source.readString();
}
public Student()
{}
public void setName(String name)
{
this.name = name;
}
public void setFatherName(String father_name)
{
this.father_name = father_name;
}
@Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
// TODO Auto-generated method stub
dest.writeString(name);
dest.writeString(father_name);
}
public static final Parcelable.Creator<Student> CREATOR = new Parcelable.Creator<Student>() {
@Override
public Student createFromParcel(Parcel source) {
// TODO Auto-generated method stub
return new Student(source);
}
@Override
public Student[] newArray(int size) {
// TODO Auto-generated method stub
return new Student[size];
}
};
}
Explanation:
Yellow Color code : Parcelable interface has two abstract methods that we need to implement in class Student
- writeToParcel(Parcel dest, int flag) : This is the main method where we add data member to parcel using writeInt(), writeStirng () etc methods.
It has two methods –
1- T createFromParcel(Parcel parcel) :This method is called when UnMarshalling happen during receiving the data. Keep care that we receive the data member in same sequence as we write in writeToPacel(). Here we create a constructor in which we demarshalling the data.
2- NewArray(int size) : Here we just create an array of given size and return.
For set the data in class I write setter methods setName() and setFatherName(). Its optional.
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| (Folder Structure) |
Note : Better to keep this Student.java and Student.aidl in same package. And both should be copied in service side as well as client side.
Step 3: In the IRemoteInterface.aidl we change the argument type of methods
Student getName();
void setName(in Student st);
When we are passing any User defined object in AIDL then we need to specify in/out with argument
in – when the object is an IN Parameter
out – when the object is an OUT Parameter
Change should be in both side client as well as service.
Step 4: client side, we create the T (Student) type object , set the name and father name. And send using setName(Student ) method.
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
// TODO Auto-generated method stub
Log.i("RemoteClient","In onServicen binded...");
try {
serviceInterface = IRemoteInterface.Stub.asInterface(service);
Student st1 = new Student();
st1.setName("Rahul");
st1.setFatherName("Nand Kishor Kushwaha");
serviceInterface.setName(st1);
Log.i("RemoteClient","User Name = "+serviceInterface.getName().name);
Toast.makeText(localContext, ""+serviceInterface.getName().name, Toast.LENGTH_SHORT).show();
} catch (RemoteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
Step 5: Client side, In the next line I am getting the class Student from service using getName().
Log.i("RemoteClient","User Name = "+serviceInterface.getName().name);
Step 6: : Service Side, Here simply we receive the Student object in setName(). In getName() I alter the name field of object and return it.
private IRemoteInterface.Stub mBinder = new IRemoteInterface.Stub() {
@Override
public Student getName() throws RemoteException {
// TODO Auto-generated method stub
stuInfo.name = stuInfo.name.toUpperCase();
return stuInfo;
}
@Override
public void setName(Student st) throws RemoteException {
// TODO Auto-generated method stub
stuInfo = st;
}
};
Thus we pass the user defined Object (Student object) from client to server and vice versa.
NOTE : AIDL also not able to send Date type object. In the next Post I will show How to send Date Type object.
It simply copied from another site , wanted to have stuff in my blog :)
