creating parcelable in android from some of the fields of a class

Question

i have the following class which i intent to pass from one activity to another:

public class Ad extends ListItem implements parcelable{
    private String _type;         


        

Answer 1

Try design your class like this..

public class Form implements Parcelable {

private String formdata1;
private String formdata2;
private String formdata3;
private String formdata4;

public Form() {
}

public Form(Parcel in) {
    setFormdata1(in.readString());
    setFormdata2(in.readString());
    setFormdata3(in.readString());
    setFormdata4(in.readString());
}

public String getFormdata1() {
    return formdata1;
}

public void setFormdata1(String formdata1) {
    this.formdata1 = formdata1;
}

public String getFormdata2() {
    return formdata2;
}

public void setFormdata2(String formdata2) {
    this.formdata2 = formdata2;
}

public String getFormdata3() {
    return formdata3;
}

public void setFormdata3(String formdata3) {
    this.formdata3 = formdata3;
}

public String getFormdata4() {
    return formdata4;
}

public void setFormdata4(String formdata4) {
    this.formdata4 = formdata4;
}

@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel in, int arg1) {
    in.writeString(getFormdata1());
    in.writeString(getFormdata2());
    in.writeString(getFormdata3());
    in.writeString(getFormdata4());
}

public static final Parcelable.Creator<Form> CREATOR = new Parcelable.Creator<Form>() {

    @Override
    public Form createFromParcel(Parcel in) {
        return new Form(in);
    }

    @Override
    public Form[] newArray(int size) {
        return new Form[size];
    }

};

}

Answer 2

It's your code that writes to Parcel and your code that reads from Parcel. So basically yes. You can write whatever you want. Content of all members, content of some, no members, but other values you use to restore state of the object etc, etc.