第一次启动活动时，不显示图像，但在u滚动时，显示图像。我真的很困惑这个问题，请帮忙。是因为我使用的是ConstraintLayout还是RecyclerView或LinearLayout？
下面是我使用的XML代码
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.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=".InsideActivity">
<android.support.design.widget.AppBarLayout
android:id="@+id/collapsing_toolbar_appbarlayout"
android:layout_width="match_parent"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:layout_height="200dp"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:contentScrim="@android:color/transparent"
android:fitsSystemWindows="true"
>
<ImageView
android:id="@+id/collapsing_toolbar_image_view"//this where i add image to toolbar
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar //this where the toolbar asign
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView //Im using to this, to make it scrollable
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView 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"
app:cardCornerRadius="4dp">
<com.facebook.shimmer.ShimmerFrameLayout // this to make shimmer effect when loading
android:id="@+id/shimmer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
app:shimmer_clip_to_children="true"
app:shimmer_direction="left_to_right"
app:shimmer_shape="linear"
android:layout_alignParentLeft="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<include layout="@layout/placeholder_inside_item"></include>
</LinearLayout>
</com.facebook.shimmer.ShimmerFrameLayout>
<android.support.constraint.ConstraintLayout 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">
<ImageView
android:id="@+id/image_penulis"
android:layout_width="60dp"
android:layout_height="57dp"
android:layout_marginLeft="24dp"
android:layout_marginStart="24dp"
android:layout_marginTop="18dp"
android:src="@mipmap/ic_launcher_round"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/text_judul" />
<TextView
android:id="@+id/text_penulis"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="24dp"
android:text="TextView"
android:textAppearance="@android:style/TextAppearance.Medium"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/image_penulis"
app:layout_constraintTop_toBottomOf="@+id/text_judul"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="@+id/text_tanggal_tulis"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="TextView"
android:textAppearance="@style/TextAppearance.AppCompat.Small"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="@+id/image_penulis"
app:layout_constraintTop_toBottomOf="@+id/text_penulis"
app:layout_constraintVertical_bias="0.0" />
<ImageView
android:id="@+id/image_thumbnail"
android:layout_width="0dp"
android:layout_height="200dp"
android:scaleType="fitXY"
app:layout_constraintBottom_toTopOf="@+id/text_judul"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
app:layout_constraintVertical_chainStyle="packed"
android:visibility="invisible"/>
<TextView
android:id="@+id/text_judul"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="24dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="24dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:text="TextView"
android:textAppearance="@android:style/TextAppearance.Medium"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/image_thumbnail" />
<TextView
android:id="@+id/text_isi_berita"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="8dp"
android:layout_marginStart="16dp"
android:layout_marginTop="24dp"
android:text="TextView"
android:textAppearance="@android:style/TextAppearance.Medium"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/image_penulis" />
<Button
android:id="@+id/btn_comment"
android:layout_width="200dp"
android:layout_height="30dp"
android:layout_marginBottom="24dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="24dp"
android:background="@drawable/rounded_corner_button"
android:text="COMMENT"
android:textColor="@android:color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.51"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/text_isi_berita"
app:layout_constraintVertical_bias="0.0" />
</android.support.constraint.ConstraintLayout>
</android.support.v7.widget.CardView>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
下面是主要活动中的代码：
Toolbar toolbar = (Toolbar)findViewById(R.id.collapsing_toolbar);
setSupportActionBar(toolbar);
ActionBar actionBar = getSupportActionBar();
if(actionBar!=null)
{
// Display home menu item.
actionBar.setDisplayHomeAsUpEnabled(true);
}
CollapsingToolbarLayout collapsingToolbarLayout = (CollapsingToolbarLayout)findViewById(R.id.collapsing_toolbar_layout);
collapsingToolbarLayout.setTitle("");
ImageView collapsingToolbarImageView = (ImageView)findViewById(R.id.collapsing_toolbar_image_view);
collapsingToolbarImageView.setImageResource(R.drawable.food);
我遵循了可以解决我的问题的所有解决方案，但事实并非如此。请帮助
答案 0 :(得分：2)
尝试一下
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.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"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="@+id/collapsing_toolbar_appbarlayout"
android:layout_width="match_parent"
android:layout_height="200dp"
android:fitsSystemWindows="true"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="@android:color/transparent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="@+id/collapsing_toolbar_image_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="@drawable/kid"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<android.support.v7.widget.CardView 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"
app:cardCornerRadius="4dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.facebook.shimmer.ShimmerFrameLayout
android:id="@+id/shimmer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
app:shimmer_clip_to_children="true"
app:shimmer_direction="left_to_right"
app:shimmer_shape="linear">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<include layout="@layout/placeholder_inside_item"></include>
</LinearLayout>
</com.facebook.shimmer.ShimmerFrameLayout>
<android.support.constraint.ConstraintLayout 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">
<ImageView
android:id="@+id/image_penulis"
android:layout_width="60dp"
android:layout_height="57dp"
android:layout_marginLeft="24dp"
android:layout_marginStart="24dp"
android:layout_marginTop="18dp"
android:src="@mipmap/ic_launcher_round"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/text_judul" />
<TextView
android:id="@+id/text_penulis"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="24dp"
android:text="TextView"
android:textAppearance="@android:style/TextAppearance.Medium"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/image_penulis"
app:layout_constraintTop_toBottomOf="@+id/text_judul"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="@+id/text_tanggal_tulis"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="TextView"
android:textAppearance="@style/TextAppearance.AppCompat.Small"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="@+id/image_penulis"
app:layout_constraintTop_toBottomOf="@+id/text_penulis"
app:layout_constraintVertical_bias="0.0" />
<ImageView
android:id="@+id/image_thumbnail"
android:layout_width="0dp"
android:layout_height="200dp"
android:scaleType="fitXY"
android:visibility="invisible"
app:layout_constraintBottom_toTopOf="@+id/text_judul"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
app:layout_constraintVertical_chainStyle="packed" />
<TextView
android:id="@+id/text_judul"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="24dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="24dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:text="TextView"
android:textAppearance="@android:style/TextAppearance.Medium"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/image_thumbnail" />
<TextView
android:id="@+id/text_isi_berita"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="8dp"
android:layout_marginStart="16dp"
android:layout_marginTop="24dp"
android:text="TextView"
android:textAppearance="@android:style/TextAppearance.Medium"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/image_penulis" />
<Button
android:id="@+id/btn_comment"
android:layout_width="200dp"
android:layout_height="30dp"
android:layout_marginBottom="24dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="24dp"
android:background="@drawable/rounded_corner_button"
android:text="COMMENT"
android:textColor="@android:color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.51"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/text_isi_berita"
app:layout_constraintVertical_bias="0.0" />
</android.support.constraint.ConstraintLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>