Created
May 4, 2018 14:20
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CollapsingHeaderView
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<?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" | |
android:layout_width="match_parent" | |
android:layout_height="match_parent" | |
android:fitsSystemWindows="true"> | |
<android.support.design.widget.AppBarLayout | |
android:id="@+id/app_bar_layout" | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
android:fitsSystemWindows="true"> | |
<android.support.design.widget.CollapsingToolbarLayout | |
android:id="@+id/collapsing_toolbar" | |
android:layout_width="match_parent" | |
android:layout_height="match_parent" | |
app:layout_scrollFlags="scroll|exitUntilCollapsed" | |
android:fitsSystemWindows="true" | |
app:contentScrim="@android:color/transparent"> | |
<FrameLayout | |
android:id="@+id/collapsing_header_view_top" | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
app:layout_collapseMode="none"/> | |
</android.support.design.widget.CollapsingToolbarLayout> | |
</android.support.design.widget.AppBarLayout> | |
<FrameLayout | |
android:id="@+id/collapsing_header_view_bottom" | |
android:layout_width="match_parent" | |
android:layout_height="match_parent" | |
android:clipToPadding="false" | |
app:layout_behavior="@string/appbar_scrolling_view_behavior"/> | |
<FrameLayout | |
android:id="@+id/collapsing_header_view_divider" | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
android:visibility="gone" | |
app:layout_anchor="@id/collapsing_header_view_bottom" | |
app:layout_anchorGravity="top" | |
app:layout_collapseMode="none"/> | |
</android.support.design.widget.CoordinatorLayout> |
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package com.savrov.collapsingheaderview | |
import android.annotation.SuppressLint | |
import android.content.Context | |
import android.support.design.widget.AppBarLayout | |
import android.support.design.widget.CollapsingToolbarLayout | |
import android.support.design.widget.CoordinatorLayout | |
import android.support.v4.app.Fragment | |
import android.support.v7.widget.RecyclerView | |
import android.util.AttributeSet | |
import android.util.Log | |
import android.view.View | |
import android.widget.FrameLayout | |
import android.opengl.ETC1.getHeight | |
import android.view.ViewTreeObserver | |
import android.R.attr.data | |
import android.util.TypedValue | |
import android.view.ViewGroup | |
import android.widget.LinearLayout | |
@SuppressLint("LongLogTag") | |
class CollapsingHeaderView : CoordinatorLayout { | |
companion object { | |
private const val TAG = "CollapsingHeaderView::class" | |
} | |
lateinit var view: View | |
lateinit var viewTop: FrameLayout | |
lateinit var viewBottom: FrameLayout | |
lateinit var viewDivider: FrameLayout | |
constructor(context: Context): super(context) { | |
init(context) | |
} | |
constructor(context: Context, attributeSet: AttributeSet): super(context, attributeSet) { | |
init(context, attributeSet) | |
} | |
private fun init(context: Context, attributeSet: AttributeSet? = null) { | |
view = inflate(context, R.layout.collapsing_header_view, this) | |
viewTop = view.findViewById<FrameLayout>(R.id.collapsing_header_view_top) | |
viewDivider = view.findViewById<FrameLayout>(R.id.collapsing_header_view_divider) | |
viewBottom = view.findViewById<FrameLayout>(R.id.collapsing_header_view_bottom) | |
} | |
fun addViewTop(top: View) { | |
viewTop.addView(top) | |
} | |
fun addViewBottom(bottom: View) { | |
viewBottom.addView(bottom) | |
} | |
fun addViewDivider(divider: View) { | |
viewDivider.apply { | |
addView(divider) | |
visibility = View.VISIBLE | |
viewTreeObserver.addOnGlobalLayoutListener(object: ViewTreeObserver.OnGlobalLayoutListener { | |
override fun onGlobalLayout() { | |
viewDivider.viewTreeObserver.removeOnGlobalLayoutListener(this) | |
val bottomParams = viewBottom.layoutParams as MarginLayoutParams | |
bottomParams.topMargin = viewDivider.height/2 | |
viewBottom.apply { | |
layoutParams = bottomParams | |
setPadding(0, viewDivider.height/2, 0, 0) | |
requestLayout() | |
invalidate() | |
} | |
} | |
}) | |
} | |
} | |
fun setViewTopScrollFlags(scrollFlags: Int) { | |
val collapsingToolbar = view.findViewById<CollapsingToolbarLayout>(R.id.collapsing_toolbar) | |
val params = collapsingToolbar.layoutParams as AppBarLayout.LayoutParams | |
params.scrollFlags = scrollFlags | |
collapsingToolbar.layoutParams = params | |
} | |
} |
Author
Savrov
commented
May 4, 2018
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