添加二级缓存

Author: GcsSloop

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

@@ -79,7 +79,7 @@ public void initViews(ViewHolder holder, View root) {
     private void initViewPager(ViewHolder holder) {
         ViewPager mViewPager = holder.get(R.id.view_pager);
         TabLayout mTabLayout = holder.get(R.id.tab_layout);
-        mViewPager.setOffscreenPageLimit(1); // 防止滑动到第三个页面时，第一个页面被销毁
+        mViewPager.setOffscreenPageLimit(2); // 防止滑动到第三个页面时，第一个页面被销毁
         mViewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
             String[] types = {"Topics", "News", "Sites"};
 

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

@@ -89,6 +89,7 @@ public class NewsListFragment extends BaseFragment {
     private GcsAdapter<New> mAdapter;
     private SwipeRefreshLayout mRefreshLayout;
 
+    private boolean isFirstLunch = true;
 
     public static NewsListFragment newInstance() {
         Bundle args = new Bundle();
@@ -102,24 +103,22 @@ protected int getLayoutId() {
         return R.layout.fragment_recycler_refresh;
     }
 
-    // 注意：此处实际调用位置在 initViews 之后
-    @Override
-    protected void onFirstTimeLaunched() {
-        mDiycode = Diycode.getSingleInstance();
-        mDataCache = new DataCache(getContext());
-
+    private void loadData() {
         // 第一次加载，默认从缓存加载
         List<New> news = mDataCache.getNewsList();
         if (null != news && news.size() > 0) {
             mAdapter.addDatas(news);
             mFooter.setText(FOOTER_NORMAL);
-            mRefreshLayout.setEnabled(true);
-            mRefreshLayout.setRefreshing(true);
-            new Handler().postDelayed(new Runnable() {   // 延迟 1s，防闪屏
-                public void run() {
-                    refresh();
-                }
-            }, 1000);
+            if (isFirstLunch){
+                mRefreshLayout.setEnabled(true);
+                mRefreshLayout.setRefreshing(true);
+                new Handler().postDelayed(new Runnable() {   // 延迟 1s，防闪屏
+                    public void run() {
+                        refresh();
+                    }
+                }, 1000);
+                isFirstLunch = false;
+            }
         } else {
             loadMore();
             mFooter.setText(FOOTER_LOADING);
@@ -128,6 +127,8 @@ public void run() {
 
     @Override
     protected void initViews(ViewHolder holder, View root) {
+        mDiycode = Diycode.getSingleInstance();
+        mDataCache = new DataCache(getContext());
         mFooter = holder.get(R.id.footer);
         initRefreshLayout(holder);
         initRecyclerView(getContext(), holder);
@@ -271,6 +272,7 @@ public void onNewsList(GetNewsListEvent event) {
     public void onStart() {
         super.onStart();
         EventBus.getDefault().register(this);
+        loadData();
     }
 
     @Override

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

@@ -23,6 +23,7 @@
 package com.gcssloop.diycode.utils;
 
 import android.content.Context;
+import android.support.annotation.NonNull;
 import android.util.LruCache;
 
 import com.gcssloop.diycode_sdk.api.news.bean.New;
@@ -42,30 +43,39 @@
  * 数据缓存工具
  */
 public class DataCache {
-
-    ACache cache;
-    LruCache<String, String> mLruCache;
+    private static int M = 1024 * 1024;
+    ACache mDiskCache;
+    LruCache<String, Object> mLruCache;
 
     public DataCache(Context context) {
-        cache = ACache.get(new File(FileUtil.getExternalCacheDir(context.getApplicationContext(), "diy-data")));
-        mLruCache = new LruCache<>(3 * 1024);
+        mDiskCache = ACache.get(new File(FileUtil.getExternalCacheDir(context.getApplicationContext(), "diy-data")));
+        mLruCache = new LruCache<>(5 * M);
     }
 
     public <T extends Serializable> void saveListData(String key, List<T> data) {
         ArrayList<T> datas = (ArrayList<T>) data;
-        cache.put(key, datas, ACache.TIME_WEEK);     // 数据缓存时间为 1 周
+        mLruCache.put(key, datas);
+        mDiskCache.put(key, datas, ACache.TIME_WEEK);     // 数据缓存时间为 1 周
     }
 
-    public <T extends Serializable> void saveData(String key, T data) {
-        cache.put(key, data, ACache.TIME_WEEK);     // 数据缓存时间为 1 周
+    public <T extends Serializable> void saveData(@NonNull String key, @NonNull T data) {
+        mLruCache.put(key, data);
+        mDiskCache.put(key, data, ACache.TIME_WEEK);     // 数据缓存时间为 1 周
     }
 
-    public <T extends Serializable> T getData(String key) {
-        return (T) cache.getAsObject(key);
+    public <T extends Serializable> T getData(@NonNull String key) {
+        T result = (T) mLruCache.get(key);
+        if (result == null) {
+            result = (T) mDiskCache.getAsObject(key);
+            if (result != null) {
+                mLruCache.put(key, result);
+            }
+        }
+        return result;
     }
 
     public void removeDate(String key) {
-        cache.remove(key);
+        mDiskCache.remove(key);
     }
 
     public void saveTopicContent(TopicContent content) {
@@ -75,7 +85,6 @@ public void saveTopicContent(TopicContent content) {
             preview = preview.substring(0, 100);
         }
         saveData("topic_content_preview" + content.getId(), preview);
-        mLruCache.put("topic_content_preview" + content.getId(), preview);
     }
 
     public TopicContent getTopicContent(int id) {
@@ -84,16 +93,7 @@ public TopicContent getTopicContent(int id) {
 
     public String getTopicPreview(int id) {
         String key = "topic_content_preview" + id;
-        String result = null;
-        result = mLruCache.get(key);
-        if (null != result) {
-            return result;
-        }
-        result = getData(key);
-        if (null != result) {
-            mLruCache.put(key, result);
-        }
-        return result;
+        return getData(key);
     }
 
     public void saveTopicRepliesList(int topic_id, List<TopicReply> replyList) {