Android Parcelable -- RetailerOrderActivity.java return null

Question

I have to pass one activity to another activity: I have SalesProduct enetity class: ``` public class Product implements Parcelable{ private double availableQuantity; private double price; private String productCode; private String description; private String description2; private String productGroup; private String alternateSearch; private String productTypeCode; private String nonStockItemFlag; private String salableFlag; private double weight; private double qty; private double grossValue; private double value; private ArrayList product; public Product() { } public Product(Parcel in) { this(); readFromParcel(in); } /* * Constructor calls read to create object */ private void readFromParcel(Parcel in) { in.readTypedList(product, Product.CREATOR); /* NULLPOINTER HERE */ } public int describeContents() { return 0; } public void writeToParcel(Parcel dest, int flags) { dest.writeList(product); } public static final Parcelable.Creator CREATOR = new Parcelable.Creator

Accepted Answer

Here is how you can pass an ArrayList as I tried it. MyListClass.java - Custom class ``` public class MyListClass implements Parcelable{ private int test; public MyListClass() {} public MyListClass(Parcel read){ test = read.readInt(); } public int getTest() { return test; } public void setTest(int test) { this.test = test; } public static final Parcelable.Creator CREATOR = new Parcelable.Creator() { @Override public MyListClass createFromParcel(Parcel source) { return new MyListClass(source); } @Override public MyListClass[] newArray(int size) { return new MyListClass[size]; } }; @Override public int describeContents() { return 0; } @Override public void writeToParcel(Parcel arg0, int arg1) { arg0.writeInt(test); } } ``` MyParcelable.java ``` public class MyParcelable implements Parcelable { private List arrList = new ArrayList(); private int myInt = 0; private String str = null; public String getStr() { return str; } public void setStr(String str) { this.str = str; } public List getArrList() { return arrList; } public void setArrList(List arrList) { this.arrList = arrList; } public int getMyInt() { return myInt; } public void setMyInt(int myInt) { this.myInt = myInt; } MyParcelable() { // initialization arrList = new ArrayList(); } public MyParcelable(Parcel in) { myInt = in.readInt(); str = in.readString(); in.readTypedList(arrList, MyListClass.CREATOR); } @Override public int describeContents() { return 0; } @Override public void writeToParcel(Parcel outParcel, int flags) { outParcel.writeInt(myInt); outParcel.writeString(str); outParcel.writeTypedList(arrList); } public static final Parcelable.Creator CREATOR = new Parcelable.Creator() { @Override public MyParcelable createFromParcel(Parcel in) { return new MyParcelable(in); } @Override public MyParcelable[] newArray(int size) { return new MyParcelable[size]; } }; } ``` MainAcitivty.java ``` @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); arrList.add(new MyListClass()); arrList.get(0).setTest(200); MyParcelable object = new MyParcelable(); object.setMyInt(100); object.setArrList(arrList); Intent intent = new Intent(MainActivity.this,ReceiverParcel.class); intent.putExtra("parcel", object); startActivity(intent); } ``` ReceiverParcel.java ``` @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle b = getIntent().getExtras(); MyParcelable object = b.getParcelable("parcel"); System.out.println(object.getArrList().get(0).getTest()); System.out.println(object.getMyInt()); } ```

Android Parcelable -- RetailerOrderActivity.java return null

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