Android parcelling test

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.issuu.parcelerarraytest.app.MainActivity">

    <TextView
        android:id="@+id/text_view"
        android:text="@string/hello_world"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

MainActivity.java

package com.issuu.parcelerarraytest.app;

import android.app.Activity;
import android.os.Parcelable;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

import org.parceler.Parcel;
import org.parceler.ParcelConstructor;
import org.parceler.ParcelerRuntimeException;
import org.parceler.Parcels;

import java.lang.reflect.Field;
import java.util.Arrays;


public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        IntArrayClass prewrap = new IntArrayClass(10, new int[] { 1,2,3,4 });
        IntArrayClass unwrapped = Parcels.unwrap(wrap(prewrap));

        if (unwrapped.arr != null && unwrapped.arr.length == 4
                && Arrays.toString(prewrap.arr).equals(Arrays.toString(unwrapped.arr))) {
            ((TextView)findViewById(R.id.text_view)).setText(Arrays.toString(unwrapped.arr));
        } else {
            ((TextView)findViewById(R.id.text_view)).setText("failed :-(");
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


    @Parcel(Parcel.Serialization.METHOD)
    public static class IntArrayClass {

        int[] arr;
        int i;

        @ParcelConstructor
        public IntArrayClass(int i, int[] arr) {
            this.arr = arr;
            this.i = i;
        }

        public IntArrayClass() {}

        public int[] getArr() { return arr; }
        public void setArr(int arr[]) { this.arr = arr; }
        public int getI() { return i; }
        public void setI(int i) { this.i = i; }
    }

    public static Parcelable wrap(Object input){
        try{
            android.os.Parcel parcel = android.os.Parcel.obtain();
            Parcelable parcelable = Parcels.wrap(input);
            parcelable.writeToParcel(parcel, 0);
            Field creatorField = parcelable.getClass().getField("CREATOR");
            return (Parcelable)((Parcelable.Creator)creatorField.get(parcelable)).createFromParcel(parcel);
        } catch (IllegalAccessException e) {
            throw new ParcelerRuntimeException("IllegalAccessException", e);
        } catch (NoSuchFieldException e) {
            throw new ParcelerRuntimeException("NoSuchFieldException", e);
        }
    }
}