Update

app/src/main/java/com/hippo/ehviewer/client/EhClient.java

@@ -71,7 +71,7 @@ public final class EhClient {
         ThreadFactory threadFactory = new PriorityThreadFactory(TAG,
                 Process.THREAD_PRIORITY_BACKGROUND);
         mRequestThreadPool = new ThreadPoolExecutor(poolSize, poolSize,
-                1, TimeUnit.SECONDS, requestWorkQueue, threadFactory);
+                1L, TimeUnit.SECONDS, requestWorkQueue, threadFactory);
     }
 
     public static String getUrlHeader(int mode) {
@@ -86,8 +86,8 @@ public final class EhClient {
         }
     }
 
-    public static interface EhClientListener {
-        public void onFailure(Exception e);
+    public interface EhClientListener {
+        void onFailure(Exception e);
     }
 
     public abstract static class OnGetGalleryListListener implements EhClientListener {
@@ -111,9 +111,9 @@ public final class EhClient {
     }
 
     private interface BgJobHelper {
-        public void doInBackground();
+        void doInBackground();
 
-        public void onPostExecute();
+        void onPostExecute();
     }
 
     private abstract class SimpleBgJobHelper implements BgJobHelper {

app/src/main/java/com/hippo/ehviewer/ui/ContentActivity.java

@@ -24,7 +24,6 @@ import android.support.v4.widget.DrawerLayout;
 import com.hippo.content.VectorContext;
 import com.hippo.ehviewer.R;
 import com.hippo.ehviewer.ui.scene.GalleryListScene;
-import com.hippo.ehviewer.widget.ContentLayout;
 import com.hippo.scene.StageActivity;
 import com.hippo.scene.StageLayout;
 
@@ -33,7 +32,7 @@ public class ContentActivity extends StageActivity {
     private Resources mResources;
 
     private DrawerLayout mDrawerLayout;
-    private ContentLayout mContentLayout;
+    private StageLayout mContentLayout;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -43,21 +42,15 @@ public class ContentActivity extends StageActivity {
         mResources = getResources();
 
         mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
-        mContentLayout = (ContentLayout) mDrawerLayout.findViewById(R.id.stage);
+        mContentLayout = (StageLayout) mDrawerLayout.findViewById(R.id.stage);
 
         mDrawerLayout.setStatusBarBackground(R.color.theme_primary_dark);
 
         if (savedInstanceState == null) {
             startScene(GalleryListScene.class, null);
         }
-    }
 
-    public int getFitPaddingBottom() {
-        return mContentLayout.getFitPaddingBottom();
-    }
-
-    public void setOnGetFitPaddingListener(ContentLayout.OnGetFitPaddingListener listener) {
-        mContentLayout.setOnGetFitPaddingListener(listener);
+        onCreateStageLayout(mContentLayout);
     }
 
     @Override

app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryListScene.java

@@ -16,35 +16,16 @@
 package com.hippo.ehviewer.ui.scene;
 
 import android.annotation.SuppressLint;
-import android.app.Activity;
-import android.content.Intent;
 import android.content.res.Resources;
-import android.database.Cursor;
-import android.net.Uri;
 import android.os.Bundle;
-import android.os.Parcelable;
-import android.provider.MediaStore;
-import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
-import android.support.v4.view.PagerAdapter;
-import android.support.v4.view.ViewPager;
-import android.util.SparseArray;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.Button;
 
 import com.hippo.ehviewer.R;
-import com.hippo.ehviewer.data.ListUrlBuilder;
 import com.hippo.ehviewer.ui.ContentActivity;
 import com.hippo.ehviewer.widget.ContentLayout;
-import com.hippo.ehviewer.widget.SearchLayout;
 import com.hippo.scene.Scene;
-import com.hippo.scene.TransitionCurtain;
-import com.hippo.widget.Appbar;
 
-public class GalleryListScene extends Scene implements SearchLayout.SearhLayoutHelper,
-        Scene.ActivityResultListener, ContentLayout.OnGetFitPaddingListener {
+public class GalleryListScene extends Scene {
 
     private final static int PAGE_INDEX_SEARCH = 0;
     private final static int PAGE_INDEX_LIST = 1;
@@ -53,145 +34,23 @@ public class GalleryListScene extends Scene implements SearchLayout.SearhLayoutH
     private ContentActivity mActivity;
     private Resources mResources;
 
-    private View mSearchView;
-    private SearchLayout mSearchLayout;
-
-    private View mListView;
-
-    private Appbar mAppbar;
-    private ViewPager mViewPager;
-
-    private PagerAdapter mPagerAdapter;
+    private ContentLayout mContentLayout;
 
     @SuppressLint("InflateParams")
     @Override
     public void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        setContentView(R.layout.scene_gallery_list);
 
         mActivity = (ContentActivity) getStageActivity();
         mResources = mActivity.getResources();
 
-        LayoutInflater inflater = mActivity.getLayoutInflater();
+        mContentLayout = (ContentLayout) findViewById(R.id.content_layout);
 
-        // Search View
-        mSearchView = inflater.inflate(R.layout.fragment_search, null);
-        mSearchLayout = (SearchLayout) mSearchView.findViewById(R.id.search_layout);
+        mContentLayout.showText("无法连接网络");
+    }
 
-        mSearchLayout.setHelper(this);
-
-        // List View
+    protected void onGetFitPaddingBottom(int b) {
         // TODO
-        mListView = inflater.inflate(R.layout.fragment_list, null);
-
-        Button bb = (Button) mListView.findViewById(R.id.test_button);
-        bb.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                startScene(TestScene.class, null, new TransitionCurtain(new TransitionCurtain.ViewPair[] {
-                        new TransitionCurtain.ViewPair(R.id.haha, R.id.haha),
-                        new TransitionCurtain.ViewPair(R.id.bbbbbb, R.id.bbbbbb)
-                }));
-            }
-        });
-
-        // Main View
-        setContentView(R.layout.scene_gallery_list);
-        mAppbar = (Appbar) findViewById(R.id.appbar);
-        mViewPager = (ViewPager) findViewById(R.id.viewPager);
-
-        mAppbar.setTitle(mResources.getString(R.string.app_name));
-
-        mPagerAdapter = new SimplePagerAdapter();
-        mViewPager.setAdapter(mPagerAdapter);
-        mViewPager.setCurrentItem(PAGE_INDEX_LIST);
-
-        // Fit Padding Bottom
-        mActivity.setOnGetFitPaddingListener(this);
-        int fitPaddingBottom = mActivity.getFitPaddingBottom();
-        if (fitPaddingBottom != -1) {
-            setFitPaddingBottom(fitPaddingBottom);
-        }
-    }
-
-    private void setFitPaddingBottom(int fitPaddingBottom) {
-        mSearchLayout.setFitPaddingBottom(fitPaddingBottom);
-    }
-
-    @Override
-    protected void onRestoreInstanceState(@NonNull SparseArray<Parcelable> savedStates) {
-        super.onRestoreInstanceState(savedStates);
-
-        // mSearchView and mListView may not in hierarchy
-        mSearchView.restoreHierarchyState(savedStates);
-        mListView.restoreHierarchyState(savedStates);
-    }
-
-    @Override
-    public void onRequestSearch(ListUrlBuilder lub) {
-        // TODO
-    }
-
-    @Override
-    public void onRequestSelectImage() {
-        Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
-        startActivityForResult(intent, this);
-    }
-
-    @Override
-    public void onGetResult(int resultCode, Intent data) {
-        if (resultCode == Activity.RESULT_OK && data != null) {
-            Uri selectedImage = data.getData();
-            String[] filePathColumn = { MediaStore.Images.Media.DATA };
-
-            Cursor cursor = mActivity.getContentResolver().query(selectedImage,
-                    filePathColumn, null, null, null);
-            cursor.moveToFirst();
-
-            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
-            String imagePath = cursor.getString(columnIndex);
-            cursor.close();
-
-            if (imagePath != null) {
-                mSearchLayout.onSelectImage(imagePath);
-            }
-        }
-    }
-
-    @Override
-    public void onGetFitPadding(int l, int t, int r, int b) {
-        setFitPaddingBottom(b);
-    }
-
-    private class SimplePagerAdapter extends PagerAdapter {
-        @Override
-        public int getCount() {
-            return PAGE_NUMBER;
-        }
-
-        @Override
-        public boolean isViewFromObject(View view, Object object) {
-            return view == object;
-        }
-
-        @Override
-        public Object instantiateItem(ViewGroup view, int position) {
-            View v;
-            switch (position) {
-                default:
-                case PAGE_INDEX_SEARCH:
-                    v = mSearchView;
-                    break;
-                case PAGE_INDEX_LIST:
-                    v = mListView;
-                    break;
-            }
-            view.addView(v);
-            return v;
-        }
-
-        @Override
-        public void destroyItem(ViewGroup view, int position, Object object) {
-            view.removeView((View) object);
-        }
     }
 }

app/src/main/java/com/hippo/ehviewer/ui/scene/SearchScene.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2015 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.ehviewer.ui.scene;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.content.res.Resources;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.provider.MediaStore;
+import android.support.annotation.Nullable;
+
+import com.hippo.ehviewer.R;
+import com.hippo.ehviewer.data.ListUrlBuilder;
+import com.hippo.ehviewer.ui.ContentActivity;
+import com.hippo.ehviewer.widget.SearchLayout;
+import com.hippo.scene.Scene;
+
+public class SearchScene extends Scene implements SearchLayout.SearhLayoutHelper,
+        Scene.ActivityResultListener{
+
+    private ContentActivity mActivity;
+    private Resources mResources;
+
+    private SearchLayout mSearchLayout;
+
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.scene_search);
+
+        mActivity = (ContentActivity) getStageActivity();
+        mResources = mActivity.getResources();
+
+        mSearchLayout = (SearchLayout) findViewById(R.id.search_layout);
+
+        mSearchLayout.setHelper(this);
+    }
+
+    protected void onGetFitPaddingBottom(int b) {
+        mSearchLayout.setFitPaddingBottom(b);
+    }
+
+    @Override
+    public void onRequestSearch(ListUrlBuilder lub) {
+        // TODO
+    }
+
+    @Override
+    public void onRequestSelectImage() {
+        Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
+        startActivityForResult(intent, this);
+    }
+
+    @Override
+    public void onGetResult(int resultCode, Intent data) {
+        if (resultCode == Activity.RESULT_OK && data != null) {
+            Uri selectedImage = data.getData();
+            String[] filePathColumn = { MediaStore.Images.Media.DATA };
+
+            Cursor cursor = mActivity.getContentResolver().query(selectedImage,
+                    filePathColumn, null, null, null);
+            cursor.moveToFirst();
+
+            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
+            String imagePath = cursor.getString(columnIndex);
+            cursor.close();
+
+            if (imagePath != null) {
+                mSearchLayout.onSelectImage(imagePath);
+            }
+        }
+    }
+}

app/src/main/java/com/hippo/ehviewer/widget/ContentLayout.java

@@ -16,75 +16,177 @@
 package com.hippo.ehviewer.widget;
 
 import android.content.Context;
-import android.graphics.Rect;
-import android.support.annotation.NonNull;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.StaggeredGridLayoutManager;
 import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.FrameLayout;
+import android.widget.ProgressBar;
+import android.widget.TextView;
 
-import com.hippo.scene.StageLayout;
+import com.hippo.ehviewer.R;
+import com.hippo.util.IntIdGenerator;
+import com.hippo.util.ViewUtils;
+import com.hippo.widget.recyclerview.EasyRecyclerView;
+import com.hippo.widget.refreshlayout.RefreshLayout;
 
-public class ContentLayout extends StageLayout {
+import java.util.ArrayList;
+import java.util.List;
 
-    private OnGetFitPaddingListener mOnGetFitPaddingListener;
+public class ContentLayout extends FrameLayout {
 
-    private int mFitPaddingLeft = -1;
-    private int mFitPaddingTop = -1;
-    private int mFitPaddingRight = -1;
-    private int mFitPaddingBottom = -1;
+    private ProgressBar mProgressBar;
+    private ViewGroup mItView;
+    private RefreshLayout mRefreshLayout;
+    private View mImageView;
+    private TextView mTextView;
 
     public ContentLayout(Context context) {
         super(context);
+        init(context);
     }
 
     public ContentLayout(Context context, AttributeSet attrs) {
         super(context, attrs);
+        init(context);
     }
 
     public ContentLayout(Context context, AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
+        init(context);
     }
 
-    public ContentLayout(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
+    private void init(Context context) {
+        LayoutInflater.from(context).inflate(R.layout.widget_content_layout, this);
+
+        mProgressBar = (ProgressBar) getChildAt(0);
+        mItView = (ViewGroup) getChildAt(1);
+        mRefreshLayout = (RefreshLayout) getChildAt(2);
+        mImageView = mItView.getChildAt(0);
+        mTextView = (TextView) mItView.getChildAt(1);
     }
 
-    @SuppressWarnings("deprecation")
-    @Override
-    protected boolean fitSystemWindows(@NonNull Rect insets) {
-        mFitPaddingLeft = 0;
-        mFitPaddingTop = 0;
-        mFitPaddingRight = 0;
-        mFitPaddingBottom = insets.bottom;
-        if (mOnGetFitPaddingListener != null) {
-            mOnGetFitPaddingListener.onGetFitPadding(mFitPaddingLeft, mFitPaddingTop,
-                    mFitPaddingRight, mFitPaddingBottom);
+    public void showProgressBar() {
+        ViewUtils.setVisibility(mProgressBar, View.VISIBLE);
+        ViewUtils.setVisibility(mItView, View.GONE);
+        ViewUtils.setVisibility(mRefreshLayout, View.GONE);
+    }
+
+    public void showText(CharSequence text) {
+        ViewUtils.setVisibility(mProgressBar, View.GONE);
+        ViewUtils.setVisibility(mItView, View.VISIBLE);
+        ViewUtils.setVisibility(mRefreshLayout, View.GONE);
+
+        mTextView.setText(text);
+    }
+
+    private abstract static class ContentHelper<E, VH extends RecyclerView.ViewHolder>
+            extends EasyRecyclerView.Adapter<VH>
+            implements RefreshLayout.OnHeaderRefreshListener,
+            RefreshLayout.OnFooterRefreshListener {
+
+        private RecyclerView mRecyclerView;
+        private StaggeredGridLayoutManager mLayoutManager;
+
+        /**
+         * Store data
+         */
+        private List<E> mList;
+
+        private IntIdGenerator mIdGenerator;
+
+        /**
+         * First index index of current page
+         */
+        private int mFirstIndex;
+        /**
+         * Last index index of current page
+         */
+        private int mLastIndex;
+        /**
+         * Current page index
+         */
+        private int mCurrentPage;
+        /**
+         * First shown page index
+         */
+        private int mFirstPage;
+        /**
+         * Last shown page index
+         */
+        private int mLastPage;
+        /**
+         * The number of page in sum
+         */
+        private int mPageNum;
+
+        private int mCurrentTaskId;
+        private int mCurrentTaskType;
+
+        private ContentHelper(RecyclerView recyclerView,
+                StaggeredGridLayoutManager layoutManager) {
+            mRecyclerView = recyclerView;
+            mLayoutManager = layoutManager;
+
+            mList = new ArrayList<>();
+            mIdGenerator = IntIdGenerator.create();
         }
 
-        insets.set(insets.left, insets.top, insets.right, 0);
+        /**
+         *
+         * @param location
+         * @return
+         * @throws IndexOutOfBoundsException
+         *                if {@code location < 0 || location >= size()}
+         */
+        public E getDataAt(int location) {
+            return mList.get(location);
+        }
 
-        return super.fitSystemWindows(insets);
-    }
+        public abstract E[] getPageData(int page);
 
-    public void setOnGetFitPaddingListener(OnGetFitPaddingListener listener) {
-        mOnGetFitPaddingListener = listener;
-    }
+        public void onGetPageData(int mTaskId, int page, E[] data) {
 
-    public int getFitPaddingLeft() {
-        return mFitPaddingLeft;
-    }
+        }
 
-    public int getFitPaddingTop() {
-        return mFitPaddingTop;
-    }
+        @Override
+        public boolean onFooterRefresh() {
+            return false;
+        }
 
-    public int getFitPaddingRight() {
-        return mFitPaddingRight;
-    }
+        @Override
+        public void onHeaderRefresh() {
 
-    public int getFitPaddingBottom() {
-        return mFitPaddingBottom;
-    }
+        }
 
-    public interface OnGetFitPaddingListener {
-        public void onGetFitPadding(int l, int t, int r, int b);
+        public void refresh() {
+
+        }
+
+        public void goTo(int page) {
+            if (page < 0 || page >= mPageNum) {
+                throw new IndexOutOfBoundsException("Page number is " + mPageNum + ", page is " + page);
+            }
+
+            if (page > mFirstIndex) {
+
+            }
+
+
+
+        }
+
+        abstract public void onScrollStateChanged(RecyclerView recyclerView, int newState);
+
+        public class OnScrollListener extends RecyclerView.OnScrollListener {
+            @Override
+            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
+                ContentHelper.this.onScrollStateChanged(recyclerView, newState);
+            }
+
+
+        }
     }
 }

app/src/main/java/com/hippo/scene/Scene.java

@@ -56,6 +56,8 @@ public abstract class Scene {
 
     private static SceneManager sSceneManager;
 
+    private int mFitPaddingBottom = -1;
+
     static void setSceneManager(SceneManager sceneManager) {
         sSceneManager = sceneManager;
     }
@@ -156,6 +158,13 @@ public abstract class Scene {
         onOut();
     }
 
+    void getFitPaddingBottom(int b) {
+        if (mFitPaddingBottom != b) {
+            mFitPaddingBottom = b;
+            onGetFitPaddingBottom(b);
+        }
+    }
+
     public void setBackgroundColor(int bgColor) {
         if (mBackgroundColor != bgColor) {
             mBackgroundColor = bgColor;
@@ -211,6 +220,10 @@ public abstract class Scene {
     protected void onOut() {
     }
 
+    protected void onGetFitPaddingBottom(int b) {
+    }
+
+
     public View onCreateStageBar() {
         return null;
     }

app/src/main/java/com/hippo/scene/SceneManager.java

@@ -18,7 +18,6 @@ package com.hippo.scene;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
-import android.view.View;
 
 import com.hippo.util.Log;
 
@@ -33,6 +32,8 @@ class SceneManager {
 
     private Scene mLegacyScene;
 
+    private int[] mTemp = new int[2];
+
     // Should only be called by SceneApplication
     SceneManager() {
     }
@@ -76,6 +77,12 @@ class SceneManager {
         scene.setState(Scene.SCENE_STATE_CREATE);
         scene.create(null);
 
+        // Update fit padding
+        int fitPaddingBottom = getStageActivity().getStageLayout().getFitPaddingBottom();
+        if (fitPaddingBottom != -1) {
+            scene.getFitPaddingBottom(fitPaddingBottom);
+        }
+
         if (curtain != null && previousState != null) {
             scene.setState(Scene.SCENE_STATE_OPEN);
             curtain.open(scene, previousState);
@@ -138,9 +145,11 @@ class SceneManager {
                     scene.detachFromeStage();
                 }
 
+                /*
                 // Switch stage bar
                 View stageBarContent = scene.onCreateStageBar();
                 getStageActivity().getStageBar().updateContent(stageBarContent);
+                */
             }
         } else {
             Log.e(TAG, "The scene is not in stage");
@@ -182,6 +191,10 @@ class SceneManager {
         }
     }
 
+    Stack<Scene> getSceneStack() {
+        return mSceneStack;
+    }
+
     protected void onSaveInstanceState(Bundle outState) {
         for (Scene scene : mSceneStack) {
             scene.saveInstanceState(outState);

app/src/main/java/com/hippo/scene/StageActivity.java

@@ -24,9 +24,9 @@ import android.view.View;
 
 import com.hippo.ehviewer.ui.AbsActionBarActivity;
 import com.hippo.util.IntIdGenerator;
-import com.hippo.widget.StageBar;
 
-public abstract class StageActivity extends AbsActionBarActivity {
+public abstract class StageActivity extends AbsActionBarActivity
+        implements StageLayout.OnGetFitPaddingBottomListener {
 
     private IntIdGenerator mActivityResultIdGenerator = IntIdGenerator.create();
     private SparseArray<Scene.ActivityResultListener> mActivityResultListenerMap =
@@ -40,7 +40,7 @@ public abstract class StageActivity extends AbsActionBarActivity {
 
     public abstract @NonNull StageLayout getStageLayout();
 
-    public abstract @NonNull StageBar getStageBar();
+    // public abstract @NonNull StageBar getStageBar();
 
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
@@ -49,6 +49,10 @@ public abstract class StageActivity extends AbsActionBarActivity {
         ((SceneApplication) getApplication()).getSceneManager().setStageActivity(this);
     }
 
+    protected void onCreateStageLayout(StageLayout stageLayout) {
+        stageLayout.setOnGetFitPaddingListener(this);
+    }
+
     @Override
     protected void onDestroy() {
         super.onDestroy();
@@ -56,6 +60,13 @@ public abstract class StageActivity extends AbsActionBarActivity {
         ((SceneApplication) getApplication()).getSceneManager().setStageActivity(null);
     }
 
+    @Override
+    public void onGetFitPaddingBottom(int b) {
+        for (Scene scene : sSceneManager.getSceneStack()) {
+            scene.getFitPaddingBottom(b);
+        }
+    }
+
     void attachSceneToStage(Scene scene) {
         View sceneView = scene.getSceneView();
         if (sceneView != null) {

app/src/main/java/com/hippo/scene/StageBar.java

@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-package com.hippo.widget;
+package com.hippo.scene;
 
 import android.content.Context;
 import android.support.v7.widget.CardView;
@@ -58,7 +58,4 @@ public class StageBar extends CardView {
         // TODO
         return false;
     }
-
-
-
 }

app/src/main/java/com/hippo/scene/StageLayout.java

@@ -17,6 +17,7 @@ package com.hippo.scene;
 
 import android.annotation.TargetApi;
 import android.content.Context;
+import android.graphics.Rect;
 import android.os.Build;
 import android.os.Parcelable;
 import android.support.annotation.NonNull;
@@ -26,6 +27,10 @@ import android.widget.FrameLayout;
 
 public class StageLayout extends FrameLayout {
 
+    private OnGetFitPaddingBottomListener mOnGetFitPaddingBottomListener;
+
+    private int mFitPaddingBottom = -1;
+
     public StageLayout(Context context) {
         super(context);
     }
@@ -52,4 +57,29 @@ public class StageLayout extends FrameLayout {
     protected void dispatchRestoreInstanceState(@NonNull SparseArray<Parcelable> container) {
         // Do nothing
     }
+
+    public void setOnGetFitPaddingListener(OnGetFitPaddingBottomListener listener) {
+        mOnGetFitPaddingBottomListener = listener;
+    }
+
+    @SuppressWarnings("deprecation")
+    @Override
+    protected boolean fitSystemWindows(@NonNull Rect insets) {
+        mFitPaddingBottom = insets.bottom;
+        if (mOnGetFitPaddingBottomListener != null) {
+            mOnGetFitPaddingBottomListener.onGetFitPaddingBottom(mFitPaddingBottom);
+        }
+
+        insets.set(insets.left, insets.top, insets.right, 0);
+
+        return super.fitSystemWindows(insets);
+    }
+
+    public int getFitPaddingBottom() {
+        return mFitPaddingBottom;
+    }
+
+    public interface OnGetFitPaddingBottomListener {
+        void onGetFitPaddingBottom(int b);
+    }
 }

app/src/main/java/com/hippo/scene/TransitionCurtain.java

@@ -76,7 +76,6 @@ public class TransitionCurtain extends Curtain {
 
         colorAnim.start();
 
-
         mAnimList.add(colorAnim);
 
         // Handle transit part

app/src/main/java/com/hippo/util/PriorityThreadFactory.java

@@ -15,7 +15,6 @@
  */
 package com.hippo.util;
 
-
 import android.os.Process;
 
 import java.util.concurrent.ThreadFactory;
@@ -45,5 +44,4 @@ public class PriorityThreadFactory implements ThreadFactory {
             }
         };
     }
-
 }

app/src/main/java/com/hippo/util/ViewUtils.java

@@ -350,4 +350,25 @@ public final class ViewUtils {
             vto.removeOnGlobalLayoutListener(l);
         }
     }
+
+    /**
+     * Get index in parent
+     *
+     * @param view The view
+     * @return The index
+     */
+    public static int getIndexInParent(View view) {
+        ViewParent parent =  view.getParent();
+        if (parent instanceof ViewGroup) {
+            ViewGroup viewParent = (ViewGroup) parent;
+            int count = viewParent.getChildCount();
+            for (int i = 0; i < count; i++) {
+                View v = viewParent.getChildAt(i);
+                if (v == view) {
+                    return i;
+                }
+            }
+        }
+        return -1;
+    }
 }