android-fragments

来源： https://stackoverflow.com/questions/63658694/why-does-toolbar-shadow-not-removing-in-android

来源： https://stackoverflow.com/questions/63658694/why-does-toolbar-shadow-not-removing-in-android

来源： https://stackoverflow.com/questions/50792885/supertype-initialization-is-impossible-without-primary-constructor

来源： https://stackoverflow.com/questions/50792885/supertype-initialization-is-impossible-without-primary-constructor

来源： https://stackoverflow.com/questions/63540973/how-to-enable-file-upload-in-webview

来源： https://stackoverflow.com/questions/63669116/android-navigation-components-how-to-know-if-result-is-set-onviewcreated

来源： https://stackoverflow.com/questions/59965336/calling-method-on-navigation-host-fragment-inside-mainactivity

问题 I am trying to send some data from a dialogfragment to the targeted fragment but its not working. I have written the following code, but it through exception : java.lang.NullPointerException: Attempt to invoke interface method 'void com.x.x.FragmentAlertDialog$Communicator.setI(java.lang.String)' on a null object reference Code: public class FragmentAlertDialog extends DialogFragment { Communicator callback; public interface Communicator { void setI(String name); } public static

问题 Hey guys i have a fragmentPagerAdapter with 3 fragments in it. How would i disable the swiping between the 3 fragments so the user only uses the tabview to go between fragments? Cheers! private class ViewPagerAdapter extends FragmentPagerAdapter { ArrayList<Fragment> fragments = new ArrayList<>(); ArrayList<String> tabTitles = new ArrayList<>(); public ViewPagerAdapter(android.support.v4.app.FragmentManager fragmentManager) { super(fragmentManager); } @Override public Fragment getItem(int

问题 I just implemented a bottom navigation (AS's default - File -> New -> Activity -> Bottom Navigation Activity) Everything is fine except for a space on the top of the nav_host_fragment . Since it was generated in a ConstraintLayout, I tried to clean the constraints and set the top constraint with parent , setting margin to '0dp' and set height to match_constraint . I unsuccessfully deleted the constraints and tried over and over again. I used Clean Project . I changed to RelativeLayout and set