DrawerLayout 内部的内部视图布局总是返回 FrameLayout答案

【问题标题】：Inner View Layout inside of DrawerLayout always returns FrameLayoutDrawerLayout 内部的内部视图布局总是返回 FrameLayout
【发布时间】：2017-04-18 13:17:02
【问题描述】：

我在 DrawerLayout 中有 LinearLayout，它根据 layout_weight 呈现抽屉项目和视图。我试图通过将其高度设置为 0 或使用 View.Visibility - GONE 属性以编程方式隐藏该视图。

试过

通过将其可见性设置为 GONE，它充当 INVISIBLE

通过获取其 LayoutParams 并将其高度设置为 0。虽然它充当 INVISIBLE

父布局：mother.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v4.widget.DrawerLayout
    android:id="@+id/activityMotherDrawerLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <include layout="@layout/activity_mother" />

    <include layout="@layout/motherdrawer" />

  </android.support.v4.widget.DrawerLayout>

布局：motherdrawer.xml

<?xml version="1.0" encoding="utf-8"?>
<com.app.ui.view.ScrimInsetsFrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/drawerRootLayout"
  android:layout_width="@dimen/activity_mother_drawer_width"
  android:layout_height="match_parent"
  android:layout_gravity="start"
  android:background="@color/background_application"
  android:fitsSystemWindows="false"
  android:orientation="vertical">

<RelativeLayout
    android:id="@+id/activityMotherDrawerInnerLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="@dimen/activity_mother_drawer_layout_padding">

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


        <LinearLayout
            android:id="@+id/activityMotherDrawerMyAttendanceLayout"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:clickable="true"
            android:orientation="vertical">

            <ImageView
                android:id="@+id/activityMotherDrawerMyAttendanceIv"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_centerInParent="true"
                android:layout_weight="1.5"
                android:padding="@dimen/activity_mother_drawer_image_padding"
                android:scaleType="centerInside"
                android:src="@drawable/ic_drawer_attendance" />

            <android.support.v7.widget.AppCompatTextView
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_below="@id/activityMotherDrawerMyAttendanceIv"
                android:layout_centerHorizontal="true"
                android:layout_weight="1"
                android:gravity="top|center"
                android:text="@string/activity_mother_drawer_attendance"
                android:textColor="@color/colorGray"
                android:textSize="@dimen/activity_mother_drawer_text_size" />

        </LinearLayout>

        <LinearLayout
            android:id="@+id/activityMotherDrawerDashboardLayout"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:clickable="true"
            android:orientation="vertical">

            <ImageView
                android:id="@+id/activityMotherDrawerDashboardIv"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_centerInParent="true"
                android:layout_weight="1.5"
                android:padding="@dimen/activity_mother_drawer_image_padding"
                android:scaleType="centerInside"
                android:src="@drawable/ic_drawer_dashboard" />

            <android.support.v7.widget.AppCompatTextView
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_below="@id/activityMotherDrawerDashboardIv"
                android:layout_centerHorizontal="true"
                android:layout_weight="1"
                android:gravity="top|center"
                android:text="@string/activity_mother_drawer_dashboard"
                android:textColor="@color/colorGray"
                android:textSize="@dimen/activity_mother_drawer_text_size" />

        </LinearLayout>

        <LinearLayout
            android:id="@+id/activityMotherDrawerSettingsLayout"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:clickable="true"
            android:orientation="vertical">

            <ImageView
                android:id="@+id/activityMotherDrawerSettingsIv"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_centerInParent="true"
                android:layout_weight="1.5"
                android:padding="@dimen/activity_mother_drawer_image_padding"
                android:scaleType="centerInside"
                android:src="@drawable/ic_drawer_settings" />

            <android.support.v7.widget.AppCompatTextView
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_below="@id/activityMotherDrawerSettingsIv"
                android:layout_centerHorizontal="true"
                android:layout_weight="1"
                android:gravity="top|center"
                android:text="@string/activity_mother_drawer_setting"
                android:textColor="@color/colorGray"
                android:textSize="@dimen/activity_mother_drawer_text_size" />

        </LinearLayout>
    </LinearLayout>

   </RelativeLayout>
 </com.app.ui.view.ScrimInsetsFrameLayout>`

每当我尝试使用 getLayoutParams 获取 layoutParam 时，它都会返回 FrameLayout，其中 ParentView 是 LinearLayout。

使用 Java ：

mDashboardLayout = (LinearLayout)mDrawerInnerRootLayout.findViewById(R.id.activityMotherDrawerDashboardLayout);
LinearLayout.LayoutParams mParams = (LinearLayout.LayoutParams) mDashboardLayout.getLayoutParams();//returns FrameLayout instead where it should return LinearLayout

mDashboardLayout.setVisibility(View.GONE); //it acts as INVISIBILITY

谁能告诉我为什么它返回 FrameLayout 而不是 LinearLayout 或者为什么它的 Visibility 变为 INVISIBLE 而不是 GONE？

【问题讨论】：

标签： android android-layout android-drawer

【解决方案1】：

尽管将视图更改为 GONE 或 INVISIBLE 的可见性，但视图始终是不可见的。它确实接受 onClick 事件。按照 SO，我想完全删除该视图。我可以使用以下方法实现它。

我正在相应地以编程方式将 View 添加到 ParentView 层次结构并刷新整个布局。

  View inflatedDashboardView;
  inflatedDashboardView = mInflater.inflate(R.layout.layout_drawer_dashboard, mDrawerInnerRootLayout, false);
  mDashboardLayout = (LinearLayout) inflatedDashboardView.findViewById(R.id.activityMotherDrawerDashboardLayout);
  mDrawerInnerRootLayout.addView(inflatedDashboardView);
  mDrawerInnerRootLayout.forceLayout();

我还是不明白为什么 DrawerLayout 里面的 InnerView Layout 总是返回 FrameLayout。

【讨论】：