parcelable

I am trying to send a Parcelable object which also contains another Parcelable object with Intent. However, I am getting NullPointer Exception. Could you please tell me where I am doing wrong? A.java public class A implements Parcelable { private ArrayList<B> var; public A() { this.var = new ArrayList<B>(); } public void addToB(B b) { var.add(b); } public ArrayList<B> getB() { return var; } public void setB(ArrayList<B> b) { this.var = b; } @Override public int describeContents() { return 0; } @Override public void writeToParcel(Parcel dest, int flags) { dest.writeTypedList(this.var); }

I Tried To Pass An Object Class From An Activity To Another Using Parcelable I've Create A Class And Name it Student package com.example.test08_passobjectoverintent; import android.os.Parcel; import android.os.Parcelable; public class Student implements Parcelable { private String st_AcadimicNumber ; private String st_Name ; private String st_Class ; public String getSt_AcadimicNumber() { return st_AcadimicNumber; } public void setSt_AcadimicNumber(String st_AcadimicNumber) { this.st_AcadimicNumber = st_AcadimicNumber; } public String getSt_Name() { return st_Name; } public void setSt_Name

so I am implementing a test app in which I will create a Tournament object as Parcelable and will pass them between intents. A tournament include: . A tournament name . Rule . Rule for matching players (random/manual) . An array list of Players This is what I have so far: Tournament.java public class TournamentData implements Parcelable { private String tourName; private int bestOf; private boolean isRandom; private ArrayList<Player> playerList; public TournamentData(String name, int tourBestOf, boolean random) { this.tourName = name; this.bestOf = tourBestOf; this.isRandom = random; } public

I have the following implementation of a Parcelable class: public class DemoModel implements Parcelable { private String para1; private int para2; public DemoModel(){} protected DemoModel(Parcel in) { para1 = in.readString(); para2 = in.readInt(); } @Override public void writeToParcel(Parcel parcel, int i) { parcel.writeString(para1); parcel.writeInt(para2); } //other methods } Is it important to maintain order while write/read to the parcel? And why? Yes it does . Order of write variables is up to you and you can do it as you want, but you must read them in that same exact order. It will give

I seem to be getting a strange error in my app (see GitHub ), which occurs when I pass objects to different activities that implement Parcelable . I have checked other questions and answers here on Stack Overflow, but I was unable to find a solution. I've tried the answer here , for example - here it is for reference: -keepclassmembers class * implements android.os.Parcelable { static ** CREATOR; } I've also made sure that the method calls in writeToParcel are in order. Most other questions on Stack Overflow about this issue don't have answers. Moreover, the reason I am asking a new question

I want to know is there any size limitation on Parcelable that attached to an Intent ? I Read some docs about Intents , Bundles , Parcelable again and there was nothing about size limitation. But I read some answers , that say size of attached Parcelable is limited (for example, 1 MB). So are Parcelable s limited by size or it only depends to the device? Its explained on the docs here . The transaction buffer for each process is 1 mb. In my understanding the factors to be considered are: Individual size of transactions(maximum 1 mb) The number of transactions(the sum of size of all