Android BottomSheetDialogFragment中的findViewById返回null
现在,我正在研究底部碎片。 所以我想创建一个自定义按钮来关闭对话框内部,如下所示Android BottomSheetDialogFragment中的findViewById返回null,android,android-dialogfragment,bottom-sheet,Android,Android Dialogfragment,Bottom Sheet,现在,我正在研究底部碎片。 所以我想创建一个自定义按钮来关闭对话框内部,如下所示 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="@dimen/level_12"
android:paddingRight="@dimen/level_12"
android:paddingBottom="@dimen/level_20">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="end">
<TextView
android:id="@+id/taste_filter_close_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:padding="@dimen/level_10"
android:text="@string/bottom_close_button" />
</RelativeLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/basic_taste_filter_title"
android:textColor="@color/colorPrimaryDark"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/level_10"
android:text="@string/basic_taste_filter_subtitle_default" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:baselineAligned="false"
android:orientation="horizontal"
android:weightSum="1">
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.2"
android:paddingStart="@dimen/level_flat"
android:paddingLeft="@dimen/level_flat"
android:paddingEnd="@dimen/level_2"
android:paddingRight="@dimen/level_2">
<Button
style="?android:attr/buttonBarButtonStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/green_filter_button_bg"
android:drawableTop="@drawable/ic_filter"
android:paddingTop="@dimen/level_8"
android:paddingBottom="@dimen/level_8"
android:text="@string/sweet"
android:textColor="@color/green_filter_button_text" />
</FrameLayout>
</LinearLayout>
</LinearLayout>
因此,在这之后,我尝试通过如下方式在其内部调用disclose()
来消除它
public class TasteFilterBottomDialogFragment extends BottomSheetDialogFragment {
public static TasteFilterBottomDialogFragment newInstance() {
return new TasteFilterBottomDialogFragment();
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.bottom_filter_dialog, container, false);
// get the views and attach the listener
return view;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
TextView closeBtn = (TextView) getActivity().findViewById(R.id.taste_filter_close_button);
closeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dismiss();
}
});
}
}
但是当我点击taste\u filter\u close\u按钮
时,我得到了这个错误
'void android.widget.TextView.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
那么,我该如何解决这个问题,或者我遗漏了什么
谢谢 由于该按钮在
onCreateView
期间充气,因此您可以在onCreateView()期间设置侦听器:
请注意,我正在执行view.findViewById()
而不是getActivity().findViewById()
'void android.widget.TextView.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.bottom_filter_dialog, container, false);
// get the views and attach the listener
TextView closeBtn = (TextView) view.findViewById(R.id.taste_filter_close_button);
closeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dismiss();
}
});
return view;
}