我从Firebase Crashlytics获得异常
Fatal Exception: java.lang.IllegalStateException: Fragment MyFragment{122418b (05b123e6-aa8d-4de4-8f7e-49c95018234b)} not attached to a context.
at androidx.fragment.app.Fragment.requireContext(Fragment.java:774)
at androidx.fragment.app.Fragment.getResources(Fragment.java:838)
at com.timskiy.pregnancy.fragments.MyFragment$1$1.run(MyFragment.java:156)
at android.os.Handler.handleCallback(Handler.java:907)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:216)
at android.app.ActivityThread.main(ActivityThread.java:7625)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)
来自片段的错误行
imageView.setColorFilter(ContextCompat.getColor(getContext(), R.color.blue));
也尝试过
imageView.setColorFilter(getResources().getColor(R.color.blue));
我在Activity和FragmentStatePagerAdapter中使用viewPager。我需要在片段中使用什么上下文来设置颜色滤镜? Thx
将此添加到您的片段中:
private Context mContext;
@Override
public void onAttach(Context context) {
super.onAttach(activity);
mContext = context;
}
@Override
public void onDetach() {
super.onDetach();
mContext = null;
}
并且在您的图像视图中
imageView.setColorFilter(ContextCompat.getColor(mContext, R.color.blue));
在您的片段中,可以安全地使用requireContext() / requireActivity()
内的onViewCreated
而不是getContext() / getActivity()
。
imageView.setColorFilter(ContextCompat.getColor(requireContext(), R.color.blue));