有 2 种方法可以通过以下方式创建自定义对话框DialogFragment
.
- 覆盖
onCreateDialog
并使用返回一个对话框AlertDialog.Builder
.
- 覆盖
onCreateView
.
我们注意到,如果我们覆盖onCreateDialog
,之前显示的软键盘不会被隐藏。
但是,如果我们覆盖onCreateView
, 先前显示的软键盘将被隐藏。
onCreateDialog不会隐藏软键盘
onCreateView将隐藏软键盘
隐藏软键盘不是我们想要的行为。我们希望软键盘保持原样。
但是,我们无法使用onCreateDialog
方式,由于提到的限制DialogFragment 中的 ViewPager - IllegalStateException:片段没有视图 https://stackoverflow.com/questions/20303865/viewpager-in-dialogfragment-illegalstateexception-fragment-does-not-have-a-vi。简而言之,如果您需要ViewPager
为了在对话框中正常工作,您不能使用以下方法实现自定义对话框onCreateDialog
.
如果我们使用onCreateView
,我们可以实现想要的一切,除了“不隐藏软键盘”。
你知道为什么要覆盖吗onCreateView
创建自定义对话框,会隐藏键盘吗?我们怎样才能防止这种行为呢?
Code
我的对话框风格是:
<style name="CustomDialog" parent="@style/Theme.AppCompat.Light.Dialog">
<item name="android:windowNoTitle">false</item>
</style>
ColorDialogFragment.java:
public class ColorDialogFragment extends DialogFragment {
private TabLayout tabLayout;
private ViewPager viewPager;
private ColorFragmentPagerAdapter colorFragmentPagerAdapter;
public static ColorDialogFragment newInstance() {
ColorDialogFragment colorDialogFragment = new ColorDialogFragment();
// We provide custom style, because we need title.
colorDialogFragment.setStyle(DialogFragment.STYLE_NORMAL, R.style.CustomDialog);
return colorDialogFragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onResume() {
super.onResume();
getDialog().getWindow().setLayout(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
}
private View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container) {
View view = inflater.inflate(R.layout.color_dialog_fragment, container, false);
this.tabLayout = view.findViewById(R.id.tab_layout);
this.viewPager = view.findViewById(R.id.view_pager);
this.colorFragmentPagerAdapter = new ColorFragmentPagerAdapter(this.getChildFragmentManager());
this.viewPager.setAdapter(this.colorFragmentPagerAdapter);
this.tabLayout.setupWithViewPager(this.viewPager);
return view;
}
// We overwrite onCreateView because ViewPager in DialogFragment, can hardly play well with
// onCreateDialog + AlertDialog.Builder.
//
// https://stackoverflow.com/questions/20303865/viewpager-in-dialogfragment-illegalstateexception-fragment-does-not-have-a-vi
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return onCreateView(inflater, container);
}
// We overwrite onCreateDialog, because we need title.
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Dialog dialog = super.onCreateDialog(savedInstanceState);
dialog.setTitle(R.string.select_a_color);
return dialog;
}
}