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POView -> getParent() works fine in Android 2.3 but throwing NullPointerException in Android 4+
 

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  1. POView -> getParent() works fine in Android 2.3 but throwing NullPointerException in Android 4+
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    <pre><code>private void swapLayouts(final int currentLayoutId, final int requestedLayout) { View layout = (View) this.findViewById(currentLayoutId); ViewGroup parent = (ViewGroup) layout.getParent(); int index = parent.indexOfChild(layout); parent.removeView(layout); layout = getLayoutInflater().inflate(requestedLayout, parent, false); parent.addView(layout, index); } </code></pre> <p>The <code>NullPointerException</code> is thrown at <code>ViewGroup parent = (ViewGroup) layout.getParent();</code></p> <p>This is the LogCat output :</p> <pre><code>09-30 19:04:34.465: E/AndroidRuntime(4059): FATAL EXCEPTION: main 09-30 19:04:34.465: E/AndroidRuntime(4059): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.blah.blah/com.blah.blah.VideoActivity}: java.lang.NullPointerException 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.app.ActivityThread.access$600(ActivityThread.java:141) 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.os.Handler.dispatchMessage(Handler.java:99) 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.os.Looper.loop(Looper.java:137) 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.app.ActivityThread.main(ActivityThread.java:5103) 09-30 19:04:34.465: E/AndroidRuntime(4059): at java.lang.reflect.Method.invokeNative(Native Method) 09-30 19:04:34.465: E/AndroidRuntime(4059): at java.lang.reflect.Method.invoke(Method.java:525) 09-30 19:04:34.465: E/AndroidRuntime(4059): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 09-30 19:04:34.465: E/AndroidRuntime(4059): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 09-30 19:04:34.465: E/AndroidRuntime(4059): at dalvik.system.NativeStart.main(Native Method) 09-30 19:04:34.465: E/AndroidRuntime(4059): Caused by: java.lang.NullPointerException 09-30 19:04:34.465: E/AndroidRuntime(4059): at com.blah.blah.VideoActivity.swapLayouts(VideoActivity.java:287) 09-30 19:04:34.465: E/AndroidRuntime(4059): at com.blah.blah.VideoActivity.onCreate(VideoActivity.java:75) 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.app.Activity.performCreate(Activity.java:5133) 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 09-30 19:04:34.465: E/AndroidRuntime(4059): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 09-30 19:04:34.465: E/AndroidRuntime(4059): ... 11 more </code></pre>
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    1. USGeobits
    1. USEd_Fernando
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      1. POView -> getParent() works fine in Android 2.3 but throwing NullPointerException in Android 4+
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      1. VTUpMod
    1. COAnd `layout` is non-null?
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      1. POView -> getParent() works fine in Android 2.3 but throwing NullPointerException in Android 4+
      1. USlaalto
    2. COIn that case layout must be null, check for that.
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      1. POView -> getParent() works fine in Android 2.3 but throwing NullPointerException in Android 4+
      1. USSwetank
    3. COI am pretty new to Java programming. I'm assuming it is non-null as I have initialized it with a valid layout id. The code works perfect in a Android 2.3.4 emulator and device but the exception is thrown on Android 4.0.3 and 4.3 emulators and a 4.3 device. Please ask for more info if needed. Thank you.
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      1. POView -> getParent() works fine in Android 2.3 but throwing NullPointerException in Android 4+
      1. USEd_Fernando
 

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