保存TopicList状态

Author: GcsSloop

diycode-app/src/main/java/com/gcssloop/diycode/activity/SettingActivity.java

@@ -36,6 +36,7 @@
 import java.io.File;
 
 public class SettingActivity extends BaseActivity implements View.OnClickListener {
+    private Config mConfig;
 
     @Override
     protected int getLayoutId() {
@@ -45,16 +46,16 @@ protected int getLayoutId() {
     @Override
     protected void initViews(ViewHolder holder, View root) {
         setTitle("设置");
-        final Config config = Config.getSingleInstance();
+        mConfig = Config.getSingleInstance();
         showCacheSize(holder);
 
-        Boolean isUseInside = config.isUseInsideBrowser();
+        Boolean isUseInside = mConfig.isUseInsideBrowser();
         Switch isUseInsideBrowser = holder.get(R.id.use_inside_browser);
         isUseInsideBrowser.setChecked(isUseInside);
         isUseInsideBrowser.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
-                config.setUesInsideBrowser(isChecked);
+                mConfig.setUesInsideBrowser(isChecked);
             }
         });
 

diycode-app/src/main/java/com/gcssloop/diycode/fragment/TopicListFragment.java

@@ -27,6 +27,7 @@
 import android.support.v4.util.ArrayMap;
 import android.support.v4.widget.NestedScrollView;
 import android.support.v4.widget.SwipeRefreshLayout;
+import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.view.View;
 import android.widget.TextView;
@@ -35,11 +36,12 @@
 import com.gcssloop.diycode.adapter.TopicAdapter;
 import com.gcssloop.diycode.base.app.BaseFragment;
 import com.gcssloop.diycode.base.app.ViewHolder;
+import com.gcssloop.diycode.utils.Config;
 import com.gcssloop.diycode.utils.DataCache;
-import com.gcssloop.diycode.utils.RecyclerViewUtil;
 import com.gcssloop.diycode_sdk.api.Diycode;
 import com.gcssloop.diycode_sdk.api.topic.bean.Topic;
 import com.gcssloop.diycode_sdk.api.topic.event.GetTopicsListEvent;
+import com.gcssloop.diycode_sdk.log.Logger;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -80,9 +82,12 @@ public class TopicListFragment extends BaseFragment {
     // View
     private TopicAdapter mAdapter;
     private SwipeRefreshLayout mRefreshLayout;
+    NestedScrollView mScrollView;
+    private LinearLayoutManager mLinearLayoutManager;
 
     private boolean isFirstLaunch = true;             // 是否是第一次加载
 
+    private Config mConfig;
 
     public static TopicListFragment newInstance() {
         Bundle args = new Bundle();
@@ -98,16 +103,18 @@ protected int getLayoutId() {
 
     @Override
     protected void initViews(ViewHolder holder, View root) {
+        mConfig = Config.getSingleInstance();
         mDiycode = Diycode.getSingleInstance();
         mDataCache = new DataCache(getContext());
         mFooter = holder.get(R.id.footer);
+        mScrollView = holder.get(R.id.scroll_view);
         initRefreshLayout(holder);
         initRecyclerView(getContext(), holder);
         initListener(holder);
     }
 
     // 加载数据，默认从缓存加载
-    private void loadData() {
+    private void initData() {
         mRefreshLayout.setEnabled(true);
         List<Topic> topics = mDataCache.getTopicsList();
         if (null != topics && topics.size() > 0) {
@@ -137,9 +144,16 @@ private void initRefreshLayout(ViewHolder holder) {
     }
 
     private void initRecyclerView(final Context context, ViewHolder holder) {
-        mAdapter = new TopicAdapter(context, mDataCache);
         RecyclerView recyclerView = holder.get(R.id.recycler_view);
-        RecyclerViewUtil.init(context, recyclerView, mAdapter);
+        mAdapter = new TopicAdapter(context, mDataCache);
+        recyclerView.setAdapter(mAdapter);
+        mLinearLayoutManager = new LinearLayoutManager(context);
+        mLinearLayoutManager.setSmoothScrollbarEnabled(true);
+        mLinearLayoutManager.setAutoMeasureEnabled(true);
+        recyclerView.setLayoutManager(mLinearLayoutManager);
+        recyclerView.setHasFixedSize(true);
+        recyclerView.setNestedScrollingEnabled(false);
+        Logger.e("初始化View");
     }
 
     private void initListener(ViewHolder holder) {
@@ -235,12 +249,32 @@ public void onTopicList(GetTopicsListEvent event) {
     public void onStart() {
         super.onStart();
         EventBus.getDefault().register(this);
-        loadData();
+        initData();
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        final int lastScroll = mConfig.getTopicLastScroll();
+        mScrollView.post(new Runnable() {
+            @Override
+            public void run() {
+                mScrollView.scrollTo(0, lastScroll);
+            }
+        });
     }
 
     @Override
     public void onStop() {
         super.onStop();
         EventBus.getDefault().unregister(this);
     }
+
+    @Override
+    public void onDestroyView() {
+        // 保存
+        int lastScrollY = mScrollView.getScrollY();
+        mConfig.saveTopicListScroll(lastScrollY);
+        super.onDestroyView();
+    }
 }

diycode-app/src/main/java/com/gcssloop/diycode/utils/Config.java

@@ -24,10 +24,15 @@
 
 import android.content.Context;
 import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.util.LruCache;
 
 import com.gcssloop.diycode_sdk.utils.ACache;
 
+import java.io.Serializable;
+
+import static android.R.attr.value;
+
 /**
  * 用户设置
  */
@@ -56,20 +61,50 @@ public static Config getSingleInstance() {
         return mConfig;
     }
 
-    private static String Key_Browser = "isUseInsideBrowser_";
+    //--- 基础 -----------------------------------------------------------------------------------
+
+    public <T extends Serializable> void saveData(@NonNull String key, @NonNull T value) {
+        mLruCache.put(key, value);
+        mDiskCache.put(key, value);
+    }
+
+    public <T extends Serializable> T getData(@NonNull String key, @Nullable T defaultValue) {
+        T result = (T) mLruCache.get(key);
+        if (result != null) {
+            return result;
+        }
+        result = (T) mDiskCache.getAsObject(key);
+        if (result != null) {
+            mLruCache.put(key, value);
+            return result;
+        }
+        return defaultValue;
+    }
+
+    //--- 浏览器 ---------------------------------------------------------------------------------
+
+    private static String Key_Browser = "UseInsideBrowser_";
 
     public void setUesInsideBrowser(@NonNull Boolean bool) {
-        mLruCache.put(Key_Browser, bool);
-        mDiskCache.put(Key_Browser, bool);
+        saveData(Key_Browser, bool);
     }
 
     public Boolean isUseInsideBrowser() {
-        Boolean bool = (Boolean) mLruCache.get(Key_Browser);
-        if (bool == null)
-            bool = (Boolean) mDiskCache.getAsObject(Key_Browser);
-        if (bool == null)
-            bool = true;
-        setUesInsideBrowser(bool);
-        return bool;
+        return getData(Key_Browser, true);
     }
+
+
+    //--- 状态 -----------------------------------------------------------------------------------
+
+    private String Key_TopicList_LastScroll = "Key_TopicList_LastScroll";
+
+    public void saveTopicListScroll(Integer scrollY) {
+        mLruCache.put(Key_TopicList_LastScroll, scrollY);
+        mDiskCache.put(Key_TopicList_LastScroll, scrollY);
+    }
+
+    public Integer getTopicLastScroll() {
+        return getData(Key_TopicList_LastScroll, 0);
+    }
+
 }