Question

所以我在Coordinator Layout内创建了一个持久的底部工作表。我可以将LinearLayout的高度设置为某个值500dp，但是我要达到的目标是将其高度设置为屏幕的一半。我认为我必须通过DisplayMetrics获取屏幕高度，并以某种方式将其应用于LinearLayout


<androidx.coordinatorlayout.widget.CoordinatorLayout 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"
    tools:context=".post.PostActivity">

    <LinearLayout
        android:id="@+id/gallery_bottom_sheet"
        android:layout_width="match_parent"
        android:layout_height="500dp"
        android:layout_marginHorizontal="@dimen/margin_very_small"
        android:background="@drawable/background_sheet"
        android:orientation="vertical"
        app:behavior_peekHeight="@dimen/peek_height"
        app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">

        <View
            android:layout_width="@dimen/width_forty"
            android:layout_height="@dimen/divider_large"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="@dimen/margin_small"
            android:layout_marginBottom="@dimen/margin_small"
            android:background="?android:listDivider" />

        <GridView
            android:id="@+id/gallery_grid_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:horizontalSpacing="@dimen/grid_spacing"
            android:nestedScrollingEnabled="true"
            android:numColumns="4"
            android:verticalSpacing="@dimen/grid_spacing" />

    </LinearLayout>


</androidx.coordinatorlayout.widget.CoordinatorLayout>

Answer 1

DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int requiredHeight = height/2;
LinearLayout linearLayout = findViewById(R.id.gallery_bottom_sheet);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, requiredHeight);
linearLayout.setLayoutParams(layoutParams);

只需将上面的代码粘贴到您的java文件中即可。

Answer 2

DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
LinearLayout linearLayout = findViewById(R.id.gallery_bottom_sheet);
LayoutParams params = layout.getLayoutParams();
params.height = (int) displayMetrics.heightPixels/2;
linearLayout.setLayoutParams(params);

只需将上面的代码复制粘贴到您的java文件中的“ onCreate”方法中即可。

Answer 3

首先通过DisplayMetrics

计算了所需的屏幕高度

DisplayMetrics displayMetrics = new DisplayMetrics();

getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);

int halfScreenHeight = displayMetrics.heightPixels / 2;

然后获取现有getLayoutParams()中的linearLayout。设置高度并应用。（也将其投射到CoordinatorLayout.LayoutParams上）

LinearLayout linearLayout = findViewById(R.id.gallery_bottom_sheet);

CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) linearLayout.getLayoutParams();

params.height = halfScreenHeight;

linearLayout.setLayoutParams(params);

是否将“材质持久底纸高度”设置为屏幕高度的一半？

3 个答案: