为什么可见性改变 before/after 嵌套片段插入

Question

我正在尝试解决与动画嵌套片段相关的更大问题，因此我创建了一个单独的项目并尝试在模块中解决它。

第一部分是在 childFragment 中切换可见性 - 我一直在尝试不同类型的代码，但不确定为什么要添加 layoutReturn.setVisibility(View.INVISIBLE);

父片段已隐藏。然而，当我在插入子片段后添加这一行时：

 @Override
public void onClick(View v) {

    //layoutReturn.setVisibility(View.INVISIBLE);

    FragmentManager childFrag = getFragmentManager();
    FragmentTransaction childFragTrans = childFrag.beginTransaction();
    addressCard_fragment addressCardChild = new addressCard_fragment();
    childFragTrans.add(R.id.bottom_row_fragment_container, addressCardChild);
    //childFragTrans.setCustomAnimations(R.animator.slide_in_card, R.animator.slide_out_card);
    childFragTrans.commit();
    Toast.makeText(getActivity().getBaseContext(), "yo", Toast.LENGTH_SHORT).show();
    layoutReturn.setVisibility(View.INVISIBLE);


}

更改无效。父片段仍然可见，Toast 出现但 childFragment 仍然看不见。任何帮助将不胜感激！

主要Activity:

public class MainActivity extends AppCompatActivity {

private topRow_fragment fragmentTopRow;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    if (savedInstanceState == null) {
        fragmentTopRow = new topRow_fragment();
    }

    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.add(R.id.top_row_fragment_container, fragmentTopRow);
    fragmentTransaction.commit();
}}

parentFragment class:

public class topRow_fragment extends Fragment implements View.OnClickListener{

ImageButton btn;
View layoutReturn;

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

    btn = (ImageButton) layoutReturn.findViewById(R.id.imageLeft);
    btn.setOnClickListener(this);

    return layoutReturn;
}

@Override
public void onClick(View v) {

    //layoutReturn.setVisibility(View.INVISIBLE);

    FragmentManager childFrag = getFragmentManager();
    FragmentTransaction childFragTrans = childFrag.beginTransaction();
    addressCard_fragment addressCardChild = new addressCard_fragment();
    childFragTrans.add(R.id.bottom_row_fragment_container, addressCardChild);
    //childFragTrans.setCustomAnimations(R.animator.slide_in_card, R.animator.slide_out_card);
    childFragTrans.commit();
    Toast.makeText(getActivity().getBaseContext(), "yo", Toast.LENGTH_SHORT).show();
    layoutReturn.setVisibility(View.INVISIBLE);


}}

childFragment class 就是典型的 onCreateView 方法。

Update01：当我使用 getChildFragmentManager 时，我收到以 09-14 22:54:34.933 20795-20795/com.example.bryanjordan.nestedfragmentstest E/FragmentManager: No view found for id 0x7f0c0060 (com.example.bryanjordan.nestedfragmentstest:id/bottom_row_fragment_container) for fragment addressCard_fragment{7d09836 #0 id=0x7f0c0060}

开头的大量错误

总结为：java.lang.IllegalArgumentException: No view found for id 0x7f0c0060 (com.example.bryanjordan.nestedfragmentstest:id/bottom_row_fragment_container) for fragment addressCard_fragment{7d09836 #0 id=0x7f0c0060}

XML 个文件：

主要Activity:

<?xml version="1.0" encoding="utf-8"?><RelativeLayout 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="wrap_content"
tools:context="com.example.bryanjordan.nestedfragmentstest.MainActivity">

<android.support.constraint.ConstraintLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <android.support.constraint.ConstraintLayout
        android:layout_width="368dp"
        android:layout_height="wrap_content"
        tools:layout_editor_absoluteY="8dp"
        android:id="@+id/constraintLayout"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent">

        <RelativeLayout
            android:id="@+id/top_row_fragment_container"
            android:layout_width="367dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            tools:layout_editor_absoluteY="8dp"
            tools:layout_editor_absoluteX="1dp">
        </RelativeLayout>

        <RelativeLayout
            android:id="@+id/bottom_row_fragment_container"
            android:layout_width="367dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            tools:layout_editor_absoluteY="8dp"
            tools:layout_editor_absoluteX="1dp">
        </RelativeLayout>



    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        app:layout_constraintTop_toBottomOf="@+id/constraintLayout"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent">

        <RelativeLayout
            android:id="@+id/second_Row_container"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginLeft="6dp"
            android:layout_marginRight="8dp"
            android:layout_marginStart="8dp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_editor_absoluteY="25dp">

        </RelativeLayout>
    </android.support.constraint.ConstraintLayout>

</android.support.constraint.ConstraintLayout>

firstrow_fragment

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/parent_row_container"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
tools:context="com.example.bryanjordan.nestedfragmentstest.MainActivity">

<android.support.constraint.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.CardView
        android:id="@+id/cardTop"
        android:layout_width="340dp"
        android:layout_height="80dp"
        android:layout_margin="5dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginTop="3dp"
        android:elevation="5dp"
        app:cardCornerRadius="5dp"
        app:contentPadding="5dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_goneMarginLeft="5dp"
        app:layout_goneMarginRight="5dp"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp">

        <android.support.constraint.ConstraintLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:paddingLeft="5dp"
            android:paddingRight="5dp">

            <ImageButton
                android:id="@+id/imageLeft"
                android:layout_width="60dp"
                android:layout_height="60dp"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:adjustViewBounds="true"
                android:background="@drawable/square"
                android:clickable="true"
                android:scaleType="centerCrop"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <ImageView
                android:id="@+id/imageCentre"
                android:layout_width="60dp"
                android:layout_height="60dp"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="13dp"
                android:layout_marginStart="13dp"
                android:layout_marginTop="8dp"
                android:background="@drawable/square"
                android:clickable="true"
                android:scaleType="centerCrop"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toRightOf="@+id/imageLeft"
                app:layout_constraintTop_toTopOf="parent" />

            <ImageView
                android:id="@+id/imageRight"
                android:layout_width="60dp"
                android:layout_height="60dp"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="13dp"
                android:layout_marginStart="13dp"
                android:layout_marginTop="8dp"
                android:background="@drawable/square"
                android:clickable="true"
                android:scaleType="centerCrop"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toRightOf="@+id/imageCentre"
                app:layout_constraintTop_toTopOf="parent" />
        </android.support.constraint.ConstraintLayout>


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


</android.support.constraint.ConstraintLayout>

地址卡

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/address_card_container"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:context="com.example.bryanjordan.nestedfragmentstest.MainActivity">

<android.support.constraint.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.CardView
        android:id="@+id/years_of_cooking_xp_cardView"
        android:layout_width="337dp"
        android:layout_height="240dp"
        android:layout_margin="5dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:elevation="50dp"
        app:cardCornerRadius="5dp"
        app:contentPadding="5dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_goneMarginLeft="5dp"
        app:layout_goneMarginRight="5dp"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        tools:layout_editor_absoluteY="20dp">
        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal"
            android:paddingLeft="5dp"
            android:paddingRight="5dp">

            <TextView
                android:id="@+id/textView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:layout_marginRight="8dp"
                android:layout_marginTop="8dp"
                android:text="Test"
                android:textAlignment="center"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintRight_toRightOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <ImageButton
                android:id="@+id/experience_left_button"
                android:layout_width="60dp"
                android:layout_height="60dp"
                android:layout_marginRight="40dp"
                android:layout_marginTop="8dp"
                android:adjustViewBounds="true"
                android:background="@drawable/square"
                android:clickable="true"
                android:scaleType="centerCrop"
                app:layout_constraintRight_toLeftOf="@+id/experience_centre_button"
                app:layout_constraintTop_toBottomOf="@+id/textView" />

            <ImageButton
                android:id="@+id/experience_centre_button"
                android:layout_width="60dp"
                android:layout_height="60dp"
                android:layout_marginLeft="8dp"
                android:layout_marginRight="8dp"
                android:layout_marginTop="8dp"
                android:adjustViewBounds="true"
                android:background="@drawable/square"
                android:clickable="true"
                android:scaleType="centerCrop"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintRight_toRightOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/textView"
                app:layout_constraintHorizontal_bias="0.498" />

            <ImageButton
                android:id="@+id/experience_right_button"
                android:layout_width="60dp"
                android:layout_height="60dp"
                android:layout_marginLeft="40dp"
                android:layout_marginTop="8dp"
                android:adjustViewBounds="true"
                android:background="@drawable/square"
                android:clickable="true"
                android:scaleType="centerCrop"
                app:layout_constraintLeft_toRightOf="@+id/experience_centre_button"
                app:layout_constraintTop_toBottomOf="@+id/textView" />

            <TextView
                android:id="@+id/zero_to_one_Year"
                android:layout_width="40dp"
                android:layout_height="wrap_content"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="8dp"
                android:layout_marginRight="8dp"
                android:layout_marginTop="8dp"
                android:text="0 - 1 Year"
                android:textAlignment="center"
                app:layout_constraintBottom_toBottomOf="@+id/experience_left_button"
                app:layout_constraintLeft_toLeftOf="@+id/experience_left_button"
                app:layout_constraintRight_toRightOf="@+id/experience_left_button"
                app:layout_constraintTop_toTopOf="@+id/experience_left_button" />

            <TextView
                android:id="@+id/one_to_three_years"
                android:layout_width="40dp"
                android:layout_height="wrap_content"
                android:text="1 - 3 Years"
                android:textAlignment="center"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="8dp"
                android:layout_marginRight="8dp"
                android:layout_marginTop="8dp"
                app:layout_constraintBottom_toBottomOf="@+id/experience_centre_button"
                app:layout_constraintLeft_toLeftOf="@+id/experience_centre_button"
                app:layout_constraintRight_toRightOf="@+id/experience_centre_button"
                app:layout_constraintTop_toTopOf="@+id/experience_centre_button"
                />

            <TextView
                android:id="@+id/three_plus_years"
                android:layout_width="40dp"
                android:layout_height="wrap_content"
                android:text="3+ Years"
                android:textAlignment="center"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="8dp"
                android:layout_marginRight="8dp"
                android:layout_marginTop="8dp"
                app:layout_constraintBottom_toBottomOf="@+id/experience_right_button"
                app:layout_constraintLeft_toLeftOf="@+id/experience_right_button"
                app:layout_constraintRight_toRightOf="@+id/experience_right_button"
                app:layout_constraintTop_toTopOf="@+id/experience_right_button"
                />

        </android.support.constraint.ConstraintLayout>


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

</android.support.constraint.ConstraintLayout>

Answer 1

您的 top_row_fragment_container 和 bottom_row_fragment_container 容器都在 MainActivity 中。那么它可能不是嵌套片段。

嵌套片段意味着片段位于片段.

内

您的容器高度为 wrap_content。

android:layout_height="wrap_content"

设置一些高度以使您的两个片段都可见。

从您的代码中删除 layoutReturn.setVisibility(View.INVISIBLE);。

Answer 2

解决方案

首先感谢 Bhuvanesh Bs 和 JRamesh 的帮助。

对于那些面临类似问题的人，我建议您尽快考虑以下事项：

确保您在另一个片段中初始化您的子片段。虽然 Bhuvanesh 建议不要将 FrameLayout 移动到父片段中，但我发现这很有效。不幸的是，子片段现在正在父片段的 CardView 中初始化。
通过引用子片段的容器来解决切换可见性问题，该子片段是 FrameLayout 添加到第 1 点中所述的父片段。
关于切换 layoutReturn 的可见性，我认为这是因为我在返回 layoutReturn 时没有更新任何更改。这解释了为什么没有任何添加，activity 会变成空白。但是，一旦添加新片段，布局就会发生变化，因此更改布局的可见性现在已经过时了。应该注意的是，我对这个答案没有信心，所以请半信半疑。

干杯

为什么可见性改变 before/after 嵌套片段插入

Why does visibility change before/after nested fragment insertion

android

android-layout

android-fragments

android-fragmentactivity