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POAndroid java app works on one version but not the next
 

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  1. POAndroid java app works on one version but not the next
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    <p>I'm very new to android, in fact only started yesterday. I managed to get an application setup with tabs. It works fine on a 2.2 virtual avd (i think it is called). But the version my HTC has is 2.0.1 I'm posting snippets of the code below as well as debug info.</p> <p>Logcat shows the following error</p> <pre><code>08-02 09:56:05.946: WARN/dalvikvm(414): threadid=3: thread exiting with uncaught exception (group=0x4001b188) 08-02 09:56:05.956: ERROR/AndroidRuntime(414): Uncaught handler: thread main exiting due to uncaught exception 08-02 09:56:06.196: ERROR/AndroidRuntime(414): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.hyperActiveSolutions/org.hyperActiveSolutions.Organizer}: java.lang.NullPointerException 08-02 09:56:06.196: ERROR/AndroidRuntime(414): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2481) 08-02 09:56:06.196: ERROR/AndroidRuntime(414): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2497) </code></pre> <p>There is more to that but i thought this was the relevant bit, the rest is just the long stack trace.</p> <p>My android manifest file looks like this</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="org.hyperActiveSolutions" android:versionCode="1" android:versionName="1.0"&gt; &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt; &lt;activity android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar" android:name="Organizer"&gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;activity android:name="Home" &gt;&lt;/activity&gt; &lt;activity android:name="Account"&gt;&lt;/activity&gt; &lt;activity android:name="Agenda" &gt;&lt;/activity&gt; &lt;activity android:name="Lists" &gt;&lt;/activity&gt; &lt;/application&gt; &lt;uses-sdk android:minSdkVersion="6" android:targetSdkVersion="6"&gt;&lt;/uses-sdk&gt; &lt;/manifest&gt; </code></pre> <p>As you can see the minimum sdk and the target have been set to my phone's version. This is the start of my entry class. Below where this snippet ends is 3 other tabs being added in exactly the same way as Home.</p> <pre><code>public class Organizer extends TabActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setContentView(R.layout.main); final TabHost tabHost = getTabHost(); // The activity TabHost // Create an Intent to launch an Activity for the tab (to be reused) // Initialize a TabSpec for each tab and add it to the TabHost tabHost.addTab(tabHost.newTabSpec("home").setIndicator("Home", getResources().getDrawable(R.drawable.home)).setContent(new Intent().setClass(this, Home.class))); </code></pre> <p>All my resources exists including the classes i'm instantiating with each tab. The only other thing i can think of that might be relevant is my main.xml for the layout. It was copied from the android dev site, in one of the tutorials.</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" /&gt; &lt;FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent" /&gt; &lt;/LinearLayout&gt; &lt;/TabHost&gt; </code></pre> <p>As i said it works fine on version 2.2 but dies on 2.0.1 and the message displayed on screen is just "Organizer termintated unexpectedly"....part of the message anyway.</p> <p>So can anyone spot anything i have that would make it not compatible with the 2.0.1 SDK.</p> <p>thanks in advance</p> <p>full stack trace</p> <pre><code>08-02 11:47:54.006: WARN/dalvikvm(2588): threadid=3: thread exiting with uncaught exception (group=0x4001b188) 08-02 11:47:54.016: ERROR/AndroidRuntime(2588): Uncaught handler: thread main exiting due to uncaught exception 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.organizer/com.organizer.Organizer}: java.lang.NullPointerException 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2481) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2497) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1848) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.os.Handler.dispatchMessage(Handler.java:99) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.os.Looper.loop(Looper.java:123) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.app.ActivityThread.main(ActivityThread.java:4338) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at java.lang.reflect.Method.invokeNative(Native Method) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at java.lang.reflect.Method.invoke(Method.java:521) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at dalvik.system.NativeStart.main(Native Method) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): Caused by: java.lang.NullPointerException 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.widget.TabWidget.onFocusChange(TabWidget.java:351) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.View.onFocusChanged(View.java:2622) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.View.handleFocusGainInternal(View.java:2445) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.handleFocusGainInternal(ViewGroup.java:403) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.View.requestFocus(View.java:3562) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.requestFocus(ViewGroup.java:975) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.onRequestFocusInDescendants(ViewGroup.java:1020) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.requestFocus(ViewGroup.java:976) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.onRequestFocusInDescendants(ViewGroup.java:1020) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.requestFocus(ViewGroup.java:979) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.onRequestFocusInDescendants(ViewGroup.java:1020) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.requestFocus(ViewGroup.java:976) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.onRequestFocusInDescendants(ViewGroup.java:1020) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.ViewGroup.requestFocus(ViewGroup.java:979) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.View.requestFocus(View.java:3513) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.view.View.requestFocus(View.java:3491) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.widget.TabHost.setCurrentTab(TabHost.java:334) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.widget.TabHost.addTab(TabHost.java:213) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at com.organizer.Organizer.onCreate(Organizer.java:25) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2444) 08-02 11:47:54.256: ERROR/AndroidRuntime(2588): ... 11 more 08-02 11:47:54.476: INFO/Process(62): Sending signal. PID: 2588 SIG: 3 08-02 11:47:54.476: INFO/dalvikvm(2588): threadid=7: reacting to signal 3 08-02 11:47:54.476: ERROR/dalvikvm(2588): Unable to open stack trace file '/data/anr/traces.txt': Permission denied 08-02 11:48:01.446: INFO/dalvikvm(2588): Debugger has detached; object registry had 306 entries 08-02 11:48:02.466: DEBUG/ddm-heap(2588): Got feature list request </code></pre>
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    1. COThere are roughly 0 devices in the world running Android 2.0.1. http://developer.android.com/resources/dashboard/platform-versions.html
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      1. USCommonsWare
    2. CO@CommonsWare I must be one of the unluckies, when i plug my HTC in eclipse says its 2.0.1
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