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POsetText will crush the app
 

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    <p>Hi I am starting my first android app and trying to get the TextView changed the words after some time.</p> <pre><code>public class Game1Activity extends Activity { GameViews ngv; private static String gameId = "game1Activity-game"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.game1_layout); ngv = (GameViews)findViewById(R.id.Game1); ngv.setTextView((TextView)findViewById(R.id.Text)); }; } public class GameViews extends View { private TextView gameText; private long time1 = System.currentTimeMillis(); public GameViews(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initGameViews(); } public GameViews(Context context, AttributeSet attrs) { super(context, attrs); initGameViews(); } public void setTextView(TextView tv) { gameText = tv; } public void initGameViews() { setFocusable(true); Resources r = this.getContext().getResources(); changeGameText(); } public void changeGameText() { while (true) { if (System.currentTimeMillis() - time1 &gt; 100) { gameText.setText(R.string.hi2); return; } } } } </code></pre> <p>the layout XML file is:</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;game1.code.GameViews android:id="@+id/Game1" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="center" tileSize="24" /&gt; &lt;RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="center_vertical" android:gravity="center" &gt; &lt;TextView android:id="@+id/Text" android:text="@string/hi1" android:visibility="visible" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:gravity="center_horizontal" android:textColor="#ff8888ff" android:textSize="24sp"/&gt; &lt;/RelativeLayout&gt; &lt;/FrameLayout&gt; </code></pre> <p>and the strings.xml is:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;resources&gt; &lt;string name="hi1"&gt;hi1&lt;/string&gt; &lt;string name="hi2"&gt;hi2&lt;/string&gt; &lt;/resources&gt; </code></pre> <p>When I try to run, the logCat tells me that：</p> <pre><code>03-08 03:19:28.067: E/AndroidRuntime(602): Caused by: java.lang.NullPointerException 03-08 03:19:28.067: E/AndroidRuntime(602): game1.code.GameViews.changeGameText(GameViews.java:67) 03-08 03:19:28.067: E/AndroidRuntime(602): game1.code.GameViews.initGameViews(GameViews.java:52) </code></pre> <p>It seems that the setText is causing the issue, as when I commented out this line there is no problem occurring.</p> <p>Did I miss anything? </p>
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