Question

我附上了DialogFragment的3个屏幕截图。在此对话框中，我想显示RecyclerView。对话框打开时，前2项的宽度缩小。但是当第3项出现后稍微滚动一下，它会以预期的宽度显示[查看截图1＆amp; 2]。如果我继续从上到下滚动，那么我会看到正常显示的其余项目。然后我再次从下往上滚动，令人惊讶地注意到第1和第2项也按预期显示。
[查看截图号。 3]

我想分享我的代码。

来自我的适配器类：

@Override
public CustomViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
    return new CustomViewHolder(view);
}

item.xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:paddingTop="8dp"
    android:paddingStart="16dp"
    android:paddingEnd="16dp">

    <TextView
        android:id="@+id/modalityTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toRightOf="@id/modalityTitle"
        tools:text="X-Ray"
        android:textSize="22sp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="4dp"/>

    <ImageView
        android:id="@+id/statusImageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="@id/modalityTextView"
        app:layout_constraintBottom_toBottomOf="@id/modalityTextView"
        app:layout_constraintRight_toRightOf="parent"
        android:src="@drawable/ic_remove_circle_outline_black_24dp"/>

    <TextView
        android:id="@+id/contrastTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/modalityTextView"
        app:layout_constraintLeft_toLeftOf="parent"
        android:text="@string/contrast"
        android:textStyle="bold"
        android:layout_marginTop="4dp"/>

    <TextView
        android:id="@+id/contrastTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/modalityTextView"
        app:layout_constraintLeft_toRightOf="@id/contrastTitle"
        tools:text="Oral contrast"
        android:layout_marginStart="8dp"
        android:layout_marginTop="4dp"/>


    <TextView
        android:id="@+id/bodyPartTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/contrastTitle"
        app:layout_constraintLeft_toLeftOf="parent"
        android:text="@string/bodyPart"
        android:textStyle="bold"
        android:layout_marginTop="4dp"/>

    <TextView
        android:id="@+id/bodyPartTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/contrastTextView"
        app:layout_constraintLeft_toRightOf="@id/bodyPartTitle"
        tools:text="Chest"
        android:layout_marginStart="8dp"
        android:layout_marginTop="4dp"/>

    <TextView
        android:id="@+id/procedureTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/bodyPartTitle"
        app:layout_constraintLeft_toLeftOf="parent"
        android:text="@string/procedureDescription"
        android:textStyle="bold"
        android:layout_marginTop="4dp"/>

    <TextView
        android:id="@+id/procedureDescriptionTextView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/bodyPartTitle"
        app:layout_constraintLeft_toRightOf="@id/procedureTitle"
        app:layout_constraintRight_toRightOf="parent"
        android:text="This is a procedure description. It will be a long text"
        android:layout_marginStart="8dp"
        android:layout_marginTop="4dp"/>

    <TextView
        android:id="@+id/checkedInAtTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/procedureDescriptionTextView"
        app:layout_constraintLeft_toLeftOf="parent"
        android:text="@string/checked_in_at"
        android:textStyle="bold"
        android:layout_marginTop="4dp"/>

    <TextView
        android:id="@+id/checkedInAtTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/procedureDescriptionTextView"
        app:layout_constraintLeft_toRightOf="@id/checkedInAtTitle"
        tools:text="5:00 PM"
        android:layout_marginStart="8dp"
        android:layout_marginTop="4dp"/>

    <View
        android:layout_width="0dp"
        android:layout_height="2dp"
        android:background="@color/grey"
        app:layout_constraintTop_toBottomOf="@id/checkedInAtTextView"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginTop="8dp"/>

</android.support.constraint.ConstraintLayout>

DialogFragment xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    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="400dp"
    tools:context="com.alemhealth.ticketcapture.Features.CheckInListShow.StudyListDialog.CheckInDialogFragment">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="0dp"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/colorPrimary"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent">

        <TextView
            android:id="@+id/toolbarTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/check_in_information"
            android:textColor="@color/white"
            android:textSize="18sp" />

    </android.support.v7.widget.Toolbar>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/studyListRecyclerView"
        android:layout_width="0dp"
        android:layout_height="250dp"
        app:layout_constraintTop_toBottomOf="@id/toolbar"
        app:layout_constraintBottom_toTopOf="@+id/closeButton"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginBottom="16dp">

    </android.support.v7.widget.RecyclerView>

    <Button
        android:id="@+id/closeButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@id/studyListRecyclerView"
        app:layout_constraintBottom_toBottomOf="parent"
        android:background="@drawable/custom_button"
        android:textColor="@color/buttonTextColor"
        android:text="@string/close"
        android:layout_marginBottom="8dp"/>


</android.support.constraint.ConstraintLayout>

DialogFragment的自定义主题：

<style name="DialogStyle" parent="Base.Theme.AppCompat.Dialog">
    <item name="android:windowMinWidthMajor">57%</item>
    <item name="android:windowMinWidthMinor">57%</item>
    <item name="android:textColor">@color/text_color</item>
</style>

关于DialogFragment的onCreateView：

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_check_in_dialog, container, false);

        StudyListForDialog studyListForDialog = (StudyListForDialog) getArguments().getSerializable("data");

        if(studyListForDialog!=null){
            toolbarTextView.setText(studyListForDialog.getPatientName() + " - " + studyListForDialog.getPatientAge() + " - " + studyListForDialog.getPatientGender());

            studyListRecyclerViewAdapter = new StudyListRecyclerViewAdapter(studyListForDialog, getActivity(), this);
            recyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false));
            recyclerView.setAdapter(studyListRecyclerViewAdapter);
        }    

        return view;
    }

以这种方式打开我的DialogFragment：

Bundle bundle = new Bundle();
bundle.putSerializable("data", data);

FragmentManager fragmentManager = ((Activity)view.getContext()).getFragmentManager();

CheckInDialogFragment checkInDialogFragment = new CheckInDialogFragment();
checkInDialogFragment.setStyle(DialogFragment.STYLE_NORMAL, R.style.DialogStyle);
checkInDialogFragment.setArguments(bundle);
checkInDialogFragment.show(fragmentManager, "check-in");

请帮我解决这个奇怪的问题。

Answer 1

可能是ConstaintLayout的错误。

我使用LinearLayout而不是ConstraintLayout更新了 DialogFragment XML root 。它解决了萎缩问题。

我更新的DialogFragment xml是：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/colorPrimary">

        <TextView
            android:id="@+id/toolbarTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/check_in_information"
            android:textColor="@color/white"
            android:textSize="18sp" />

    </android.support.v7.widget.Toolbar>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/studyListRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="250dp"
        app:layout_constraintTop_toBottomOf="@id/toolbar"
        app:layout_constraintBottom_toTopOf="@+id/closeButton"
        android:layout_marginBottom="16dp">

    </android.support.v7.widget.RecyclerView>

    <Button
        android:id="@+id/closeButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/custom_button"
        android:textColor="@color/buttonTextColor"
        android:text="@string/close"
        android:layout_marginBottom="8dp"
        android:layout_gravity="center"/>

</LinearLayout>

在DialogFragment内部，RecyclerView项目宽度在滚动前缩小

1 个答案: