将支持库更新到版本 23.2.0 后
compile 'com.android.support:design:23.2.0'
我在选项卡之间切换时开始出现此错误(Android 版本 5.0.2):
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.drawable.Drawable.setAlpha(int)' on a null object reference
at android.support.v4.widget.SwipeRefreshLayout.setColorViewAlpha(SwipeRefreshLayout.java:217)
at android.support.v4.widget.SwipeRefreshLayout.reset(SwipeRefreshLayout.java:199)
at android.support.v4.widget.SwipeRefreshLayout.onDetachedFromWindow(SwipeRefreshLayout.java:213)
at android.view.View.dispatchDetachedFromWindow(View.java:14579)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3138)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3135)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3135)
at android.view.ViewGroup.removeViewInternal(ViewGroup.java:4502)
at android.view.ViewGroup.removeViewInternal(ViewGroup.java:4475)
at android.view.ViewGroup.removeView(ViewGroup.java:4407)
at android.support.v4.view.ViewPager.removeView(ViewPager.java:1430)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1165)
at android.support.v4.app.FragmentManagerImpl.removeFragment(FragmentManager.java:1349)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:708)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:570)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:164)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1177)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:608)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:570)
at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:551)
at android.support.design.widget.TabLayout$ViewPagerOnTabSelectedListener.onTabSelected(TabLayout.java:1991)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:1024)
at android.support.design.widget.TabLayout.selectTab(TabLayout.java:994)
at android.support.design.widget.TabLayout$Tab.select(TabLayout.java:1262)
at android.support.design.widget.TabLayout$TabView.performClick(TabLayout.java:1360)
at android.view.View$PerformClick.run(View.java:20978)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6134)
at java.lang.reflect.Method.invoke(Method.java)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
似乎是一个支持库错误，有人也有这个问题吗？任何解决方法？
最佳答案
检查所有库是否覆盖了一些资源“void android.graphics.drawable.Drawable.setAlpha(int)”。 void setAlpha(null)
关于android - 在 SwipeRefreshLayout @ v23.2.0 上切换选项卡时出现 NPE，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35713793/