移除 SmartAdapter 对 LayoutManger 依赖

songhanghang · Apr 27, 2016 · a2a9dc1 · a2a9dc1
1 parent ed67766
commit a2a9dc1
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Showing 3 changed files with 30 additions and 13 deletions.
diff --git a/app/src/main/java/com/headerfooter/songhang/smartheaderfooterrecyclerview/MainActivity.java b/app/src/main/java/com/headerfooter/songhang/smartheaderfooterrecyclerview/MainActivity.java
@@ -65,7 +65,7 @@ public int getItemCount() {
         initHeadAndFooterView();
 
         GridLayoutManager linearLayoutManager = new GridLayoutManager(this, 3);
-        SmartRecyclerAdapter smartRecyclerAdapter = new SmartRecyclerAdapter(adapter, linearLayoutManager);
+        SmartRecyclerAdapter smartRecyclerAdapter = new SmartRecyclerAdapter(adapter);
         smartRecyclerAdapter.setFooterView(footerView);
         smartRecyclerAdapter.setHeaderView(headerView);
         recyclerView.setLayoutManager(linearLayoutManager);
@@ -103,7 +103,7 @@ public void switchLayout(View view) {
         if (recyclerView.getLayoutManager() instanceof GridLayoutManager) {
             Toast.makeText(this, "LinearLayoutManager", Toast.LENGTH_SHORT).show();
             LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
-            SmartRecyclerAdapter smartRecyclerAdapter = new SmartRecyclerAdapter(adapter, linearLayoutManager);
+            SmartRecyclerAdapter smartRecyclerAdapter = new SmartRecyclerAdapter(adapter);
             smartRecyclerAdapter.setFooterView(footerView);
             smartRecyclerAdapter.setHeaderView(headerView);
 
@@ -112,7 +112,7 @@ public void switchLayout(View view) {
         } else {
             Toast.makeText(this, "GridLayoutManager", Toast.LENGTH_SHORT).show();
             GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 3);
-            SmartRecyclerAdapter smartRecyclerAdapter = new SmartRecyclerAdapter(adapter, gridLayoutManager);
+            SmartRecyclerAdapter smartRecyclerAdapter = new SmartRecyclerAdapter(adapter);
             smartRecyclerAdapter.setFooterView(footerView);
             smartRecyclerAdapter.setHeaderView(headerView);
 

diff --git a/build.gradle b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.0.0'
+        classpath 'com.android.tools.build:gradle:2.1.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

diff --git a/library/src/main/java/com/headerfooter/songhang/library/SmartRecyclerAdapter.java b/library/src/main/java/com/headerfooter/songhang/library/SmartRecyclerAdapter.java
@@ -3,6 +3,7 @@
 import android.support.annotation.NonNull;
 import android.support.v7.widget.GridLayoutManager;
 import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.StaggeredGridLayoutManager;
 import android.view.View;
 import android.view.ViewGroup;
 
@@ -13,11 +14,12 @@ public class SmartRecyclerAdapter extends RecyclerViewAdapterWrapper {
     public static final int TYPE_HEADER = 111;
     public static final int TYPE_FOOTER = 112;
 
+    private RecyclerView.LayoutManager layoutManager;
+
     private View headerView, footerView;
 
-    public SmartRecyclerAdapter(@NonNull RecyclerView.Adapter targetAdapter, @NonNull RecyclerView.LayoutManager layoutManager) {
+    public SmartRecyclerAdapter(@NonNull RecyclerView.Adapter targetAdapter) {
         super(targetAdapter);
-        setGirdSpanSize(layoutManager);
     }
 
     public void setHeaderView(View view) {
@@ -40,7 +42,7 @@ public void removeFooterView() {
         getWrappedAdapter().notifyDataSetChanged();
     }
 
-    private void setGirdSpanSize(RecyclerView.LayoutManager layoutManager) {
+    private void setGridHeaderFooter(RecyclerView.LayoutManager layoutManager) {
         if (layoutManager instanceof GridLayoutManager) {
             final GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
             gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
@@ -65,6 +67,13 @@ private boolean hasFooter() {
         return footerView != null;
     }
 
+    @Override
+    public void onAttachedToRecyclerView(RecyclerView recyclerView) {
+        super.onAttachedToRecyclerView(recyclerView);
+        layoutManager = recyclerView.getLayoutManager();
+        setGridHeaderFooter(layoutManager);
+    }
+
     @Override
     public int getItemCount() {
         return super.getItemCount() + (hasHeader() ? 1 : 0) + (hasFooter() ? 1 : 0);
@@ -79,18 +88,25 @@ public int getItemViewType(int position) {
         if (hasFooter() && position == getItemCount() - 1) {
             return TYPE_FOOTER;
         }
-        return super.getItemViewType(hasHeader() ? position - 1: position);
+        return super.getItemViewType(hasHeader() ? position - 1 : position);
     }
 
     @Override
     public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        View itemView = null;
         if (viewType == TYPE_HEADER) {
-            return new RecyclerView.ViewHolder(headerView) {
-            };
+            itemView = headerView;
+        } else if (viewType == TYPE_FOOTER) {
+            itemView = footerView;
         }
-
-        if (viewType == TYPE_FOOTER) {
-            return new RecyclerView.ViewHolder(footerView) {
+        if (itemView != null) {
+            //set StaggeredGridLayoutManager header & footer view
+            if (layoutManager instanceof StaggeredGridLayoutManager) {
+                StaggeredGridLayoutManager.LayoutParams layoutParams = new StaggeredGridLayoutManager.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
+                layoutParams.setFullSpan(true);
+                itemView.setLayoutParams(layoutParams);
+            }
+            return new RecyclerView.ViewHolder(itemView) {
             };
         }
         return super.onCreateViewHolder(parent, viewType);
@@ -99,6 +115,7 @@ public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType
     @Override
     public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
         if (getItemViewType(position) == TYPE_HEADER || getItemViewType(position) == TYPE_FOOTER) {
+            //if you need get header & footer state , do here
             return;
         }
         super.onBindViewHolder(holder, hasHeader() ? position - 1 : position);