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POWhat is wrong with my Android class implementing Parcelable? NullPointerException in activity?
 

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  1. POWhat is wrong with my Android class implementing Parcelable? NullPointerException in activity?
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    <p>The issue is following - I start the activity and when I want to take a image I call the camera (button onclick) with startActivityForResult(intent) and the intent with bitmap returns as normal where I assign the bitmap to a property in my CounterUser object (it's class implements parcelable) and at last show it on a ImageView - this works fine..but to handle the orientation change I added the following code in the activity - this causes and NullPointerException and closes the activity: </p> <p>NOTE - counterObj is my instance of the CounterUser class which implements the Parcelable interface. </p> <pre><code>@Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putParcelable("counterObj", counterObj); } @Override protected void onRestoreInstanceState(Bundle savedInstanceState) { super.onRestoreInstanceState(savedInstanceState); if(savedInstanceState != null){ counterObj = savedInstanceState.getParcelable("counterObj"); counterImgView.setImageBitmap(counterObj.counterImg); } } </code></pre> <p>The error:</p> <p><img src="https://i.stack.imgur.com/rowUW.png" alt="enter image description here"></p> <p>This is my class implementing the Parcelable interface - it has also a Bitmap property... it uses two constructor - In the activity I use the first no argument constructor to assign null values to all instance properties </p> <pre><code>public class CounterUser implements Parcelable { String fname; String lname; String adresse; Integer counterID; Integer counterValue; Bitmap counterImg; Boolean damageExists; String damageDescript; //---- Double longitude; Double latitude; Integer workerID; String updateDate; public CounterUser(){ this(null,null,null,null,null,null,null,null,null,null,null,null); } public CounterUser(String fname, String lname, String adresse, Integer counterID, Integer counterValue, Bitmap counterImg, Boolean damageExists, String damageDescript, Double longitude, Double latitude, Integer workerID, String updateDate){ this.fname = fname; this.lname = lname; this.adresse = adresse; this.counterID = counterID; this.counterValue = counterValue; this.counterImg = counterImg; this.damageExists = damageExists; this.damageDescript = damageDescript; this.longitude = longitude; this.latitude = latitude; this.workerID = workerID; this.updateDate = updateDate; } @Override public int describeContents() { return 0; } @Override public void writeToParcel(Parcel dest, int flags) { dest.writeString(this.fname); dest.writeString(this.lname); dest.writeString(this.adresse); dest.writeInt(this.counterID); dest.writeInt(this.counterValue); //Bitmap je parcelable this.counterImg.writeToParcel(dest, flags); dest.writeByte((byte) (this.damageExists ? 1 : 0)); dest.writeString(this.damageDescript); dest.writeDouble(this.longitude); dest.writeDouble(this.latitude); dest.writeInt(this.workerID); dest.writeString(this.updateDate); } public static final Parcelable.Creator&lt;CounterUser&gt; CREATOR = new Parcelable.Creator&lt;CounterUser&gt;() { public CounterUser createFromParcel(Parcel in) { return new CounterUser(in); } public CounterUser[] newArray(int size) { return new CounterUser[size]; } }; private CounterUser(Parcel in) { this.fname = in.readString(); this.lname = in.readString(); this.adresse = in.readString(); this.counterID = in.readInt(); this.counterValue = in.readInt(); //Bitmap je parcelable this.counterImg = Bitmap.CREATOR.createFromParcel(in); this.damageExists = in.readByte() == 1; this.damageDescript = in.readString(); this.longitude = in.readDouble(); this.latitude = in.readDouble(); this.workerID = in.readInt(); this.updateDate = in.readString(); } </code></pre> <p>}</p>
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      1. POWhat is wrong with my Android class implementing Parcelable? NullPointerException in activity?
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      1. VTUpMod
    1. COUpon a quick look, it looks like your default constructor sets every property to null. So counterImg is null and not a Bitmap. So, you are trying to call the writeToParcel function of null, which does not exist.
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      1. POWhat is wrong with my Android class implementing Parcelable? NullPointerException in activity?
      1. USMatt
    2. COSomething in CounterUser.java on line 58 is null
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      1. POWhat is wrong with my Android class implementing Parcelable? NullPointerException in activity?
      1. USpetey
    3. COWell yes, I am creating an instance of CounterUser in onCreate() with empty constructor meaning that all fields of the instance will be assigned with NULL....Because the activity is sort of Form ...editText, image, firsname, etc, chechboxes....so when the user enters in the edittext something it will assign that value to the appropriate instance property (counterObj.fname = "Mark"), etc...but how should I circumvent the non null instance properties of CounterUser for Bitmaps field, etc - or in some cases the user do not enter the value and that property of counterObj will be null.
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      1. POWhat is wrong with my Android class implementing Parcelable? NullPointerException in activity?
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