Question

我使用Android Studio中提供的示例协调器layour，我将FloatingActionButton替换为自定义视图。我注意到当应用程序使用CollapsingToolbarLayout向下滚动时，FloatingActionButton会隐藏，我需要使用自定义视图复制该行为。

以下是布局的XML：

<?xml version="1.0" encoding="utf-8"?>

<android.support.design.widget.AppBarLayout
    android:id="@+id/app_bar"
    android:layout_width="match_parent"
    android:layout_height="@dimen/app_bar_height"
    android:fitsSystemWindows="true"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/toolbar_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

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

<com.github.lzyzsd.circleprogress.CircleProgress
    android:id="@+id/day_circle"
    android:layout_width="110dp"
    android:layout_height="110dp"
    android:layout_margin="@dimen/fab_margin"
    app:layout_anchor="@id/app_bar"
    app:layout_anchorGravity="bottom|end"
    custom:circle_prefix_text="$ "
    custom:circle_suffix_text=""/>

这是它展开时的样子：

这就是它倒塌时的样子：

您是否知道如何在工具栏崩溃时复制FloatingActionButton行为并隐藏自定义视图（循环进度条）？

提前谢谢。

Answer 1

URL url = new URL("http://www.android.com/");
   HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
   try {
     InputStream in = new BufferedInputStream(urlConnection.getInputStream());
     readStream(in);
    finally {
     urlConnection.disconnect();
   }
 }

布局XML

public class CircleProgressBehavior extends CoordinatorLayout.Behavior<CircleProgress> {
    public CircleProgressBehavior(Context context, AttributeSet attrs) {
    ...
    }

    @Override
    public boolean layoutDependsOn(CoordinatorLayout parent, CircleImageView child, View dependency) {
    ...
    }

    @Override
    public boolean onDependentViewChanged(CoordinatorLayout parent, CircleImageView child, View dependency) {
    ...
    }

    @Override
    private void shouldInitProperties(CircleImageView child, View dependency) {
    ...
    }
}

Github上的

Sample Code

在ScrollView中隐藏像FloatingActionButton这样的自定义视图

1 个答案: