title: Android Parcel.obtain() returns null?
body: <p>i am just developing an Android Application (API 15) and got the following Problem, when trying to write a unit test:</p>
  
  <p>I use android.os.Parcel for saving a class (e.g. if the screen is turned around) and send it to another Activity. If i try to unit test the Parcel Method like this (i got this from the internet):</p>
  
  <pre><code>@Test
  public void testParcel() {
      Comment test = new Comment();
      test.setId(testNr0Id);
      test.setComment(testNr0String);
  
  
      // Obtain a Parcel object and write the parcelable object to it:
      Parcel parcel = Parcel.obtain();
      test.writeToParcel(parcel, 0);
  
      // After you're done with writing, you need to reset the parcel for reading:
      parcel.setDataPosition(0);
  
      // Reconstruct object from parcel and asserts:
      Comment createdFromParcel = Comment.CREATOR.createFromParcel(parcel);
      assertEquals(test, createdFromParcel);
  }
  </code></pre>
  
  <p>then i get a NullPointerException, because the Parcel returned from Parcel.obtain() is null. The JavaDoc is just saying that this Method "returns an parcel Object from the pool". Now my question is: Which pool? And why is this Parcel-Object null? Any suggestions how to make this test run?</p>
  
  <p>Thanks for your help</p>
  
  <p>Michael</p>