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PONull Pointer Exception when assigned a View to an Activity?
 

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    <p>I have built an activity to handle gestures in my Android game and want it to respond to a gesture anywhere on the screen but I am getting this error on the Log:</p> <pre><code>07-27 13:55:07.268: ERROR/AndroidRuntime(751): java.lang.NullPointerException 07-27 13:55:07.268: ERROR/AndroidRuntime(751): at android.app.Activity.findViewById(Activity.java:1637) 07-27 13:55:07.268: ERROR/AndroidRuntime(751): at com.darius.android.distractions.DistractionsView$DistractionsThread$GestureActivity.onCreate(DistractionsView.java:282) 07-27 13:55:07.268: ERROR/AndroidRuntime(751): at com.darius.android.distractions.DistractionsView$DistractionsThread.doStart(DistractionsView.java:559) 07-27 13:55:07.268: ERROR/AndroidRuntime(751): at com.darius.android.distractions.DistractionsView$DistractionsThread.doKeyDown(DistractionsView.java:829) 07-27 13:55:07.268: ERROR/AndroidRuntime(751): at com.darius.android.distractions.DistractionsView.onKeyDown(DistractionsView.java:1278) </code></pre> <p>I understand I need to allocate a view to the activity and as you will see in my XML, a view called gestures will serve this purpose but I keep getting Inflation errors when trying to inflate the view. Before when this happened to me it was a misspelling of the view name in the XML but that's not it this time I don't think. </p> <p>How would I properly assign the 'gesture' view to this activity to prevent the errors?</p> <p>I do hope someone knows the answer and can help me!! Many thanks</p> <p>I have defined my activity in my code like this:</p> <pre><code>public class GestureActivity extends Activity implements GestureOverlayView.OnGesturePerformedListener{ public void onCreate(Bundle savedInstanceState){ GestureOverlayView gestures = (GestureOverlayView) findViewById(R.id.gestures); gestures.addOnGesturePerformedListener(this); Log.w(getClass().getName(), "GESTURE ACTIVITY CREATED"); // Load the gesture library Log.w(getClass().getName(), "LOADING GESTURE LIBRARY"); mLibrary = GestureLibraries.fromRawResource(this, R.raw.gestures); if(!mLibrary.load()){ finish(); } /* GestureOverlayView gestures = (GestureOverlayView) findViewById(R.id.gestures); gestures.addOnGesturePerformedListener(this); Log.w(getClass().getName(), "GESTURE ACTIVITY CREATED"); */ } public void onStart(){ //I replicated the code here from onCreate but will change this!! GestureOverlayView gestures = (GestureOverlayView) findViewById (R.id.gestures); gestures.addOnGesturePerformedListener(this); Log.w(getClass().getName(), "GESTURE ACTIVITY CREATED"); // Load the gesture library Log.w(getClass().getName(), "LOADING GESTURE LIBRARY"); mLibrary = GestureLibraries.fromRawResource(this, R.raw.gestures); if(!mLibrary.load()){ finish(); } } public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture){ ...} } </code></pre> <p>I have created the activity in the main thread in it's doStart() method by saying:</p> <pre><code>GestureActivity mGestureActivity = new GestureActivity(); mGestureActivity.onCreate(null); </code></pre> <p>And my XML layout looks like this:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" &gt; &lt;com.darius.android.distractions.DistractionsView android:id="@+id/distractions_layout" android:layout_width="match_parent" android:layout_height="match_parent"/&gt; &lt;android.gesture.GestureOverlayView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/gestures" android:layout_width="match_parent" android:layout_height="match_parent" android:gestureStrokeType="multiple" android:eventsInterceptionEnabled="true"/&gt; &lt;RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" &gt; &lt;TextView android:id="@+id/text" android:text="Hello" android:visibility="visible" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:gravity="center_horizontal" android:textColor="#88ffffff" android:textSize="24sp"/&gt; &lt;TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/concentration_bar" android:textColor = "#EB0000" android:textSize="10sp" android:id="@+id/conbartext" android:visibility="visible" &gt;&lt;/TextView&gt; &lt;/RelativeLayout&gt; </code></pre> <p></p>
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