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who can help me?I get in only Horizontal app [code]java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.systemui/com.android.systemui.recents.RecentsActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setVisibility(int)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2447) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2511) at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4121) at android.app.ActivityThread.-wrap15(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1366) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5480) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setVisibility(int)' on a null object reference at com.android.systemui.recents.RecentsActivity.updateBlurBackgroundImageView(RecentsActivity.java) at com.android.systemui.recents.RecentsActivity.onStart(RecentsActivity.java:554) at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1237) at android.app.Activity.performStart(Activity.java:6334) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2410) ... 11 more

[/code] https://drive.google.com/file/d/0B_0Jcz_4I06tOXRkbGcwb2w4MUE/view?usp=drivesdk

3jlou
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1 Answers1

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I think your view must be null.

If you want to call setVisibility() method of a view object which is not initialized, at that time this error occurs.

Please check, you must be forgotten to use findViewById().

Avijit Karmakar
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