Question

此示例直接来自Android Studio＆gt;新项目向导＆gt; “全屏活动”。为此，我刚刚在水平线性布局中添加了一些按钮。

所有布局都设置为与父级相匹配。问题是，为什么按钮不会调整大小/重新对齐/重新分隔空间并在全屏模式下适应整个屏幕宽度？

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:background="#0099cc"
    tools:context=".FullscreenActivity">

    <!-- The primary full-screen view. This can be replaced with whatever view
         is needed to present your content, e.g. VideoView, SurfaceView,
         TextureView, etc. -->
    <TextView
        android:id="@+id/fullscreen_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:keepScreenOn="true"
        android:text="@string/dummy_content"
        android:textColor="#33b5e5"
        android:textSize="50sp"
        android:textStyle="bold" />

    <!-- This FrameLayout insets its children based on system windows using
         android:fitsSystemWindows. -->
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">

            <Button
                android:id="@+id/button4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Button" />

            <Button
                android:id="@+id/button3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Button" />

            <Button
                android:id="@+id/button2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Button" />

            <Button
                android:id="@+id/button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Button" />
        </LinearLayout>

        <LinearLayout
            android:id="@+id/fullscreen_content_controls"
            style="?metaButtonBarStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|center_horizontal"
            android:background="@color/black_overlay"
            android:orientation="horizontal"
            tools:ignore="UselessParent">

            <Button
                android:id="@+id/dummy_button"
                style="?metaButtonBarButtonStyle"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="@string/dummy_button" />

        </LinearLayout>
    </FrameLayout>

</FrameLayout>

Answer 1

我觉得你的问题很有意思。我玩了一下，发现这些变化将解决问题。我不完全确定为什么这个修复工作，但它确实...

在FullScreenActivity中，进行此更改：

private final Runnable mHidePart2Runnable = new Runnable（）{ @SuppressLint（ “InlinedApi”） @覆盖 public void run（）{ //延迟删除状态和导航栏

  // Note that some of these constants are new as of API 16 (Jelly Bean)
  // and API 19 (KitKat). It is safe to use them, as they are inlined
  // at compile-time and do nothing on earlier devices.
  mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
          | View.SYSTEM_UI_FLAG_FULLSCREEN);
    /*      | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
          | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
          | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
          | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);*/
}

};

切换到全屏不会拉伸水平线性布局

1 个答案: