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java.lang.NullPointerException at android.view.ViewGroup.addViewInner(ViewGroup.java:3671) at android.view.ViewGroup.addView(ViewGroup.java:3543) at android.view.ViewGroup.addView(ViewGroup.java:3519) at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:335) at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:325) at android.app.Activity.setContentView(Activity.java:1944)