From f361b4e5c3e71d5c3444bba955410cb2b1431e72 Mon Sep 17 00:00:00 2001
From: lijian <lijian@codyy.com>
Date: Mon, 20 Apr 2020 15:25:16 +0800
Subject: [PATCH] =?UTF-8?q?feat:=E6=96=B0=E5=A2=9E=E5=90=B8=E9=A1=B6view?=
 =?UTF-8?q?=E5=B8=B8=E9=A9=BB=E9=85=8D=E7=BD=AE=E6=95=88=E6=9E=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/src/main/AndroidManifest.xml              |   3 +-
 .../consecutivescrollerdemo/MainActivity.java |   7 +
 .../PermanentStickyActivity.java              |  50 +++++++
 app/src/main/res/layout/activity_main.xml     |   5 +
 .../res/layout/activity_sticky_permanent.xml  | 135 ++++++++++++++++++
 .../ConsecutiveScrollerLayout.java            |  82 ++++++++---
 .../src/main/res/values/attrs.xml             |   3 +
 7 files changed, 261 insertions(+), 24 deletions(-)
 create mode 100644 app/src/main/java/com/donkingliang/consecutivescrollerdemo/PermanentStickyActivity.java
 create mode 100644 app/src/main/res/layout/activity_sticky_permanent.xml

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 626284f..6f83bb2 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -11,10 +11,11 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".ConsecutiveActivity"/>
+        <activity android:name=".ConsecutiveActivity"></activity>
         <activity android:name=".StickyActivity" />
         <activity android:name=".SampleActivity" />
         <activity android:name=".ViewPagerActivity" />
+        <activity android:name=".PermanentStickyActivity" />
         <activity android:name=".MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
diff --git a/app/src/main/java/com/donkingliang/consecutivescrollerdemo/MainActivity.java b/app/src/main/java/com/donkingliang/consecutivescrollerdemo/MainActivity.java
index 188e376..de3380e 100644
--- a/app/src/main/java/com/donkingliang/consecutivescrollerdemo/MainActivity.java
+++ b/app/src/main/java/com/donkingliang/consecutivescrollerdemo/MainActivity.java
@@ -44,6 +44,13 @@ public void onClick(View v) {
                 startActivity(intent);
             }
         });
+        findViewById(R.id.sticky_permanent).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent = new Intent(MainActivity.this, PermanentStickyActivity.class);
+                startActivity(intent);
+            }
+        });
 
     }
 
diff --git a/app/src/main/java/com/donkingliang/consecutivescrollerdemo/PermanentStickyActivity.java b/app/src/main/java/com/donkingliang/consecutivescrollerdemo/PermanentStickyActivity.java
new file mode 100644
index 0000000..b5fd6e0
--- /dev/null
+++ b/app/src/main/java/com/donkingliang/consecutivescrollerdemo/PermanentStickyActivity.java
@@ -0,0 +1,50 @@
+package com.donkingliang.consecutivescrollerdemo;
+
+import android.os.Bundle;
+import android.webkit.WebChromeClient;
+import android.webkit.WebView;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.donkingliang.consecutivescroller.ConsecutiveScrollerLayout;
+import com.donkingliang.consecutivescrollerdemo.adapter.RecyclerViewAdapter;
+
+public class PermanentStickyActivity extends AppCompatActivity {
+
+    private ConsecutiveScrollerLayout scrollerLayout;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_sticky_permanent);
+
+        scrollerLayout = findViewById(R.id.scrollerLayout);
+
+        WebView webView = findViewById(R.id.webView);
+        webView.loadUrl("https://github.com/donkingliang");
+
+        webView.setWebChromeClient(new WebChromeClient() {
+            @Override
+            public void onProgressChanged(WebView view, int newProgress) {
+                super.onProgressChanged(view, newProgress);
+                // 在webView加载的过程中，用户滚动了webView内容，可能会使webView的显示与scrollerLayout断层，
+                // 需要让scrollerLayout重新检查一下所有View的显示位置
+                scrollerLayout.checkLayoutChange();
+            }
+        });
+
+
+        RecyclerView recyclerView1 = findViewById(R.id.recyclerView1);
+        recyclerView1.setLayoutManager(new LinearLayoutManager(this));
+        RecyclerViewAdapter adapter1 = new RecyclerViewAdapter(this,"RecyclerView1-");
+        recyclerView1.setAdapter(adapter1);
+
+        RecyclerView recyclerView2 = findViewById(R.id.recyclerView2);
+        recyclerView2.setLayoutManager(new LinearLayoutManager(this));
+        RecyclerViewAdapter adapter2 = new RecyclerViewAdapter(this,"RecyclerView2-");
+        recyclerView2.setAdapter(adapter2);
+
+    }
+}
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 274857d..0398ce0 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -29,5 +29,10 @@
         android:layout_height="wrap_content"
         android:text="支持ViewPager"
         android:textAllCaps="false" />
+    <Button
+        android:id="@+id/sticky_permanent"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="布局吸顶常驻" />
 
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_sticky_permanent.xml b/app/src/main/res/layout/activity_sticky_permanent.xml
new file mode 100644
index 0000000..c626442
--- /dev/null
+++ b/app/src/main/res/layout/activity_sticky_permanent.xml
@@ -0,0 +1,135 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.donkingliang.consecutivescroller.ConsecutiveScrollerLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/scrollerLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:layout_isPermanent="true"
+    android:scrollbars="vertical">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@android:color/white"
+        android:padding="10dp"
+        android:text="吸顶View - 1"
+        android:textColor="@android:color/black"
+        android:textSize="18sp"
+        app:layout_isSticky="true" />
+
+    <WebView
+        android:id="@+id/webView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@android:color/white"
+        android:orientation="vertical"
+        app:layout_isSticky="true">
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:padding="10dp"
+            android:text="吸顶View - 2 我是个LinearLayout"
+            android:textColor="@android:color/black"
+            android:textSize="18sp" />
+
+    </LinearLayout>
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recyclerView1"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@android:color/white"
+        android:padding="10dp"
+        android:text="吸顶View - 3"
+        android:textColor="@android:color/black"
+        android:textSize="18sp"
+        app:layout_isSticky="true" />
+
+    <androidx.core.widget.NestedScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:background="@android:color/holo_blue_bright"
+            android:gravity="center"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="200dp"
+                android:gravity="center"
+                android:text="NestedScrollView"
+                android:textColor="@android:color/black"
+                android:textSize="24sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="200dp"
+                android:gravity="center"
+                android:text="NestedScrollView"
+                android:textColor="@android:color/black"
+                android:textSize="24sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="200dp"
+                android:gravity="center"
+                android:text="NestedScrollView"
+                android:textColor="@android:color/black"
+                android:textSize="24sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="200dp"
+                android:gravity="center"
+                android:text="NestedScrollView"
+                android:textColor="@android:color/black"
+                android:textSize="24sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="200dp"
+                android:gravity="center"
+                android:text="NestedScrollView"
+                android:textColor="@android:color/black"
+                android:textSize="24sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="200dp"
+                android:gravity="center"
+                android:text="NestedScrollView"
+                android:textColor="@android:color/black"
+                android:textSize="24sp" />
+
+        </LinearLayout>
+    </androidx.core.widget.NestedScrollView>
+
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@android:color/white"
+        android:padding="10dp"
+        android:text="吸顶View - 4"
+        android:textColor="@android:color/black"
+        android:textSize="18sp"
+        app:layout_isSticky="true" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recyclerView2"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+</com.donkingliang.consecutivescroller.ConsecutiveScrollerLayout>
\ No newline at end of file
diff --git a/consecutivescroller/src/main/java/com/donkingliang/consecutivescroller/ConsecutiveScrollerLayout.java b/consecutivescroller/src/main/java/com/donkingliang/consecutivescroller/ConsecutiveScrollerLayout.java
index 477cab0..c943e54 100644
--- a/consecutivescroller/src/main/java/com/donkingliang/consecutivescroller/ConsecutiveScrollerLayout.java
+++ b/consecutivescroller/src/main/java/com/donkingliang/consecutivescroller/ConsecutiveScrollerLayout.java
@@ -98,7 +98,7 @@ public class ConsecutiveScrollerLayout extends ViewGroup implements NestedScroll
 
     private View mScrollToTopView;
     private int mAdjust;
-
+    private boolean isPermanent;
     // 这是RecyclerView的代码，让ConsecutiveScrollerLayout的fling效果更接近于RecyclerView。
     static final Interpolator sQuinticInterpolator = new Interpolator() {
         @Override
@@ -118,7 +118,14 @@ public ConsecutiveScrollerLayout(Context context, AttributeSet attrs) {
 
     public ConsecutiveScrollerLayout(Context context, AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
-
+        TypedArray a = null;
+        try {
+            a = context.obtainStyledAttributes(attrs, R.styleable.ConsecutiveScrollerLayout);
+            isPermanent = a.getBoolean(R.styleable.ConsecutiveScrollerLayout_layout_isPermanent, false);
+        } finally {
+            if (a != null)
+                a.recycle();
+        }
         mScroller = new OverScroller(getContext(), sQuinticInterpolator);
         ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
         mMaximumVelocity = viewConfiguration.getScaledMaximumFlingVelocity();
@@ -852,38 +859,41 @@ private void resetSticky() {
             List<View> children = getStickyChildren();
             if (!children.isEmpty()) {
                 int count = children.size();
-
                 // 让所有的View恢复原来的状态
                 for (int i = 0; i < count; i++) {
                     View child = children.get(i);
                     child.setTranslationY(0);
                     child.setTranslationZ(0);
                 }
-
-                // 需要吸顶的View
-                View stickyView = null;
-                // 下一个需要吸顶的View
-                View nextStickyView = null;
-
-                // 找到需要吸顶的View
-                for (int i = count - 1; i >= 0; i--) {
-                    View child = children.get(i);
-                    if (child.getTop() <= getScrollY()) {
-                        stickyView = child;
-                        if (i != count - 1) {
-                            nextStickyView = children.get(i + 1);
+                if (isPermanent) {//常驻
+                    permanentStickyChild(children);
+                } else {//
+                    // 需要吸顶的View
+                    View stickyView = null;
+                    // 下一个需要吸顶的View
+                    View nextStickyView = null;
+
+                    // 找到需要吸顶的View
+                    for (int i = count - 1; i >= 0; i--) {
+                        View child = children.get(i);
+                        if (child.getTop() <= getScrollY()) {
+                            stickyView = child;
+                            if (i != count - 1) {
+                                nextStickyView = children.get(i + 1);
+                            }
+                            break;
                         }
-                        break;
                     }
-                }
 
-                if (stickyView != null) {
-                    int offset = 0;
-                    if (nextStickyView != null) {
-                        offset = Math.max(0, stickyView.getHeight() - (nextStickyView.getTop() - getScrollY()));
+                    if (stickyView != null) {
+                        int offset = 0;
+                        if (nextStickyView != null) {
+                            offset = Math.max(0, stickyView.getHeight() - (nextStickyView.getTop() - getScrollY()));
+                        }
+                        stickyChild(stickyView, offset);
                     }
-                    stickyChild(stickyView, offset);
                 }
+
             }
         }
     }
@@ -904,6 +914,32 @@ private void stickyChild(View child, int offset) {
         child.setClickable(true);
     }
 
+    /**
+     * 子View吸顶常驻
+     * @param children
+     */
+    @SuppressLint("NewApi")
+    private void permanentStickyChild(List<View> children) {
+        for (int i = 0; i < children.size(); i++) {
+            View child = children.get(i);
+            int permanentHeight = getPermanentHeight(children, i);
+            if (child.getTop() <= getScrollY() + permanentHeight) {
+                child.setY(getScrollY() + permanentHeight);
+                child.setTranslationZ(1);
+                child.setClickable(true);
+            }
+        }
+    }
+
+    private int getPermanentHeight(List<View> children, int currentPosition) {
+        int height = 0;
+        for (int i = 0; i < currentPosition; i++) {
+            View child = children.get(i);
+            height += child.getMeasuredHeight();
+        }
+        return height;
+    }
+
     /**
      * 使用这个方法取代View的getScrollY
      *
diff --git a/consecutivescroller/src/main/res/values/attrs.xml b/consecutivescroller/src/main/res/values/attrs.xml
index cf35add..aece890 100644
--- a/consecutivescroller/src/main/res/values/attrs.xml
+++ b/consecutivescroller/src/main/res/values/attrs.xml
@@ -5,4 +5,7 @@
         <attr name="layout_isNestedScroll" format="boolean"/>
         <attr name="layout_isSticky" format="boolean"/>
     </declare-styleable>
+    <declare-styleable name="ConsecutiveScrollerLayout">
+        <attr name="layout_isPermanent" format="boolean"/>
+    </declare-styleable>
 </resources>
\ No newline at end of file