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PONullPointerException when changing android:name value
 

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    <p>In an Android project I needed a way to retrieve a string value not from a Context but from a static method.</p> <p>For this, I've implemented the solution <a href="https://stackoverflow.com/questions/4391720/how-can-i-get-a-esource-content-from-a-static-context">How can I get a resource content from a static context?</a> and I've added to the application tag the android:name attribute: </p> <pre><code>&lt;application android:label="@string/app_name" android:allowBackup="true" android:name=".App"&gt; </code></pre> <p>Now, the application starts, but throws a NullPointerException when executing the following line of code in the OnCreate() of a secondary page:</p> <pre><code>findViewById(R.layout.level).setDrawingCacheEnabled(true); </code></pre> <p>The important part is <code>R.layout.level</code> ("level" is the name of the document that describes the page, level.xml), this object seems to be null now. Here the stack trace:</p> <pre><code>23:42:33.255 3550 com.UpMap ERROR AndroidRuntime FATAL EXCEPTION: main 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime java.lang.RuntimeException: Unable to start activity ComponentInfo{com.UpMap/com.UpMap.LevelActivity}: java.lang.NullPointerException 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at android.app.ActivityThread.access$2300(ActivityThread.java:125) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at android.os.Handler.dispatchMessage(Handler.java:99) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at android.os.Looper.loop(Looper.java:123) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at android.app.ActivityThread.main(ActivityThread.java:4627) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at java.lang.reflect.Method.invokeNative(Native Method) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at java.lang.reflect.Method.invoke(Method.java:521) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at dalvik.system.NativeStart.main(Native Method) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime Caused by: java.lang.NullPointerException 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at com.UpMap.LevelActivity.onCreate(LevelActivity.java:64) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 23:42:33.255 3550 com.UpMap ERROR AndroidRuntime ... 11 more </code></pre> <p>How can I fix this? The original solution seems ok for most of the people, but not for me! Is that something related to the android:name attribute?</p>
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    1. COTry to put the full name of the attribute like "com.google.gms.maps.GoogleMaps" (I mean the name of the activity that raises the NPE)
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