android - 为什么可见性在嵌套 fragment 插入之前/之后发生变化

标签 android android-layout android-fragments android-fragmentactivity

我正在尝试解决与动画嵌套 fragment 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) ;

After adding the child fragment, the parent fragment remains

父 fragment 是隐藏的。然而，当我在插入子 fragment 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 fragment 仍然可见，Toast 出现但 childFragment 仍然不可见。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类:

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 类就是典型的 onCreateView 方法。

Update01:当我使用 getChildFragmentManager 时，我收到一个以 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) fragment addressCard_fragment{7d09836 #0 id=0x7f0c0060}

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 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>

最佳答案

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

嵌套 fragment 是指 fragment 内的 fragment 。

您将 wrap_content 作为容器高度。

android:layout_height="wrap_content"

设置一些高度以使您的两个 fragment 都可见。

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

关于android - 为什么可见性在嵌套 fragment 插入之前/之后发生变化，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46219627/

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