Question

我第一次使用Fragments，并且尝试从Activity导航到Fragment。导航应该由将我带到所述片段的OnClickListener（ImageView）处理。但是，我的片段并没有占据整个屏幕。我在传入的视图以及本应保存Fragment的帧上设置了match-parent。因此，总的来说，我不确定是否遇到XML误解或Java。我将在下面提供尽可能多的信息；

public class recipe_detail extends AppCompatActivity {


    TextView mIngredientsTV;
    RecyclerView ingredientsRecyclerView;
    RecyclerView stepsRecyclerView;
    ImageView mBakingGif;


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


        mBakingGif.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
                ft.add(R.id.frag_container, new VideoFragment());
                ft.commit();
            }
        });


}



public class VideoFragment extends Fragment {

    ImageView mThumbnailImage;


    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {


        return inflater.inflate(R.layout.video_fragment, container, true);

    }


    // This event is triggered soon after onCreateView().
    // Any view setup should occur here.  E.g., view lookups and attaching view listeners.
    @Override
    public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {


        mThumbnailImage = view.findViewById(R.id.exo_player_view);


        Drawable myDrawable = getResources().getDrawable(R.drawable.ic_launcher_background);
        mThumbnailImage.setImageDrawable(myDrawable);


    }

}

<!--Activity to be Replaced-->

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/ScrollView01"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">


    <RelativeLayout
        android:id="@+id/parent_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <LinearLayout
            android:id="@+id/ingredients_header"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:orientation="vertical">
            <TextView
                android:id="@+id/ingredients_text_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/Ingredients_header"
                android:textColor="#000"
                android:textSize="18sp"
                android:textStyle="bold"
                tools:text="INGREDIENTS" />


            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginTop="10dp"
                android:background="#E0F2F1"
                android:orientation="vertical">


                <android.support.v7.widget.RecyclerView
                    android:id="@+id/ingredients_recycler_view"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />


            </LinearLayout>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp"
                android:text="@string/steps_label"
                android:textColor="#000"
                android:textSize="20sp"
                android:textStyle="bold" />


            <ImageView
                android:id="@+id/video_thumbnail"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                android:layout_marginTop="20dp"
                android:background="@color/colorPrimaryDark" />

        </LinearLayout>


     <!-- Frame to hold fragment-->
        <FrameLayout
            android:id="@+id/frag_container"
            android:background="@android:color/darker_gray"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

    </RelativeLayout>

</ScrollView>

<!--Fragment to be infalted-->

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/exo_content_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">


    <ImageView
        android:id="@+id/exo_player_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />


    <TextView
        android:id="@+id/description_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/exo_player_view" />


    <TextView
        android:id="@+id/short_description_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/description_tv" />

    <Button
        android:id="@+id/previous_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:text="Prev" />

    <Button
        android:id="@+id/next_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentBottom="true"
        android:text="Next" />

</RelativeLayout>

Answer 1

您要膨胀的片段将始终占用与其所在的容器一样多的空间。在您的情况下，容器（FrameLayout）的高度为WRAP_CONTENT。因此，该片段将仅占用其显示其内容所需的空间量。您可以做的是将FrameLayout的高度设置为MATCH_PARENT。这样，片段将占据整个屏幕空间。

仅需注意，在另一个视图之上添加片段时，请始终记住为片段布局提供一些背景颜色（默认情况下为透明）。否则，您以前的视图在整个片段中也将保持可见。

编辑（解释注释）

您需要像这样将FrameLayout从ScrollView中移出

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ScrollView
        android:id="@+id/ScrollView01"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

        <RelativeLayout
            android:id="@+id/parent_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <LinearLayout
                android:id="@+id/ingredients_header"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:gravity="center"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/ingredients_text_view"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/Ingredients_header"
                    android:textColor="#000"
                    android:textSize="18sp"
                    android:textStyle="bold"
                    tools:text="INGREDIENTS" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_marginTop="10dp"
                    android:background="#E0F2F1"
                    android:orientation="vertical">

                    <android.support.v7.widget.RecyclerView
                        android:id="@+id/ingredients_recycler_view"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content" />
                </LinearLayout>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="20dp"
                    android:text="@string/steps_label"
                    android:textColor="#000"
                    android:textSize="20sp"
                    android:textStyle="bold" />

                <ImageView
                    android:id="@+id/video_thumbnail"
                    android:layout_width="match_parent"
                    android:layout_height="250dp"
                    android:layout_marginTop="20dp"
                    android:background="@color/colorPrimaryDark" />
            </LinearLayout>
        </RelativeLayout>
    </ScrollView>

    <!-- Frame to hold fragment-->
    <FrameLayout
        android:id="@+id/frag_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</FrameLayout>

我所做的是将片段容器移出ScrollView。但是，由于活动/片段只能有1个根元素，所以我为ScrollView和FrameLayout添加了一个FrameLayout作为父项。

分割活动

1 个答案: