Attempt to fix selector memeory leak. Add update checker

app/src/main/java/com/stardust/widget/BindableViewHolder.java

@@ -0,0 +1,18 @@
+package com.stardust.widget;
+
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+
+/**
+ * Created by Stardust on 2017/4/8.
+ */
+
+public abstract class BindableViewHolder<DataType> extends RecyclerView.ViewHolder{
+
+
+    public BindableViewHolder(View itemView) {
+        super(itemView);
+    }
+
+    public abstract void bind(DataType data);
+}

app/src/main/java/com/stardust/widget/ItemTouchHelperSimpleCallback.java

@@ -0,0 +1,39 @@
+package com.stardust.widget;
+
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.helper.ItemTouchHelper;
+
+/**
+ * Created by Stardust on 2017/4/6.
+ */
+
+public class ItemTouchHelperSimpleCallback extends ItemTouchHelper.SimpleCallback {
+
+    private boolean mLongPressDragEnabled, mItemViewSwipeEnabled;
+
+    public ItemTouchHelperSimpleCallback(int dragDirs, int swipeDirs) {
+        super(dragDirs, swipeDirs);
+        mItemViewSwipeEnabled = swipeDirs != 0;
+        mLongPressDragEnabled = dragDirs != 0;
+    }
+
+    @Override
+    public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
+        return false;
+    }
+
+    @Override
+    public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
+
+    }
+
+    @Override
+    public boolean isLongPressDragEnabled() {
+        return mLongPressDragEnabled;
+    }
+
+    @Override
+    public boolean isItemViewSwipeEnabled() {
+        return mItemViewSwipeEnabled;
+    }
+}

app/src/main/java/com/stardust/widget/ViewHolderMutableAdapter.java

@@ -0,0 +1,28 @@
+package com.stardust.widget;
+
+import android.support.v7.widget.RecyclerView;
+import android.view.ViewGroup;
+
+/**
+ * Created by Stardust on 2017/4/8.
+ */
+
+public abstract class ViewHolderMutableAdapter<VH extends RecyclerView.ViewHolder> extends RecyclerView.Adapter<VH> {
+
+    private ViewHolderSupplier<VH> mViewHolderSupplier;
+
+    public ViewHolderMutableAdapter(ViewHolderSupplier<VH> viewHolderSupplier) {
+        mViewHolderSupplier = viewHolderSupplier;
+    }
+
+    @Override
+    public VH onCreateViewHolder(ViewGroup parent, int viewType) {
+        return mViewHolderSupplier.createViewHolder(parent, viewType);
+    }
+
+    public void setViewHolderSupplier(ViewHolderSupplier<VH> viewHolderSupplier) {
+        mViewHolderSupplier = viewHolderSupplier;
+        notifyDataSetChanged();
+    }
+
+}

app/src/main/java/com/stardust/widget/ViewHolderSupplier.java

@@ -0,0 +1,14 @@
+package com.stardust.widget;
+
+import android.support.v7.widget.RecyclerView;
+import android.view.ViewGroup;
+
+/**
+ * Created by Stardust on 2017/4/8.
+ */
+
+public abstract class ViewHolderSupplier<VH extends RecyclerView.ViewHolder> {
+
+    public abstract VH createViewHolder(ViewGroup parent, int viewType);
+
+}