Ich habe eine ClassCastException beim Versuch, AppBarLayout-Parameter festzulegen. Unten ist mein XML-CodeAndroid: App stürzt beim Versuch ab, AppBarLayout zu erhalten LayoutParams
<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"
tools:context="com.example.testapp.ConsoleActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="280dp"
android:theme="@style/AppTheme.AppBarOverlay"
android:id="@+id/app_bar_layout">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="220dp"
android:id="@+id/app_bar_account_cards_pager"
app:layout_collapseMode="parallax"
android:layout_marginTop="?attr/actionBarSize" />
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay"
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"
android:id="@+id/nested_scroll_bar"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<include layout="@layout/content_console"
android:layout_height="match_parent"
android:layout_width="match_parent"/>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
Und ich versuche Instanz AppBarLayoutParams folgenden Java-Code verwenden zu bekommen
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
AppBarLayout.LayoutParams p = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
p.setScrollFlags(0);
toolbar.setLayoutParams(p);
Aber ich java.lang.ClassCastException: android.support.design.widget.CollapsingToolbarLayout$LayoutParams cannot be cast to android.support.design.widget.AppBarLayout$LayoutParams
mit dieser Linie AppBarLayout.LayoutParams p = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
bin immer. Wie kann ich das lösen?
Ihre Symbolleiste ist in einem 'Android. support.design.widget.CollapsingToolbarLayout' –
Verwenden Sie CollapsingToolbarLayout anstelle von AppBarLayout. –
das ist, weil Ihre Symbolleiste nicht in AppBarLayout, sondern in CollapsingToolbarLayout –