Favorite to db

Author: caodongping

app/src/main/java/com/github/mzule/androidweekly/dao/FavoriteDao.java

@@ -0,0 +1,94 @@
+package com.github.mzule.androidweekly.dao;
+
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+import com.github.mzule.androidweekly.App;
+import com.github.mzule.androidweekly.entity.Article;
+import com.github.mzule.androidweekly.entity.Favorite;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by CaoDongping on 4/2/16.
+ */
+public class FavoriteDao extends SQLiteOpenHelper {
+    private static final String NAME = "favorite";
+    private static final int VERSION = 1;
+
+    public FavoriteDao() {
+        super(App.getInstance(), NAME, null, VERSION);
+    }
+
+    public List<Favorite> read() {
+        List<Favorite> favorites = new ArrayList<>();
+        Cursor cursor = getReadableDatabase().rawQuery("SELECT * FROM FAVORITE ORDER BY TIME DESC", null);
+        while (cursor.moveToNext()) {
+            Article article = new Article();
+            article.setTitle(cursor.getString(1));
+            article.setBrief(cursor.getString(2));
+            article.setLink(cursor.getString(3));
+            article.setImageUrl(cursor.getString(4));
+            article.setDomain(cursor.getString(5));
+            article.setIssue(cursor.getString(6));
+            article.setSection(cursor.getString(7));
+            Favorite favorite = new Favorite(article);
+            favorite.setTime(cursor.getLong(9));
+            favorites.add(favorite);
+        }
+        cursor.close();
+        return favorites;
+    }
+
+    public boolean contains(Article article) {
+        Cursor cursor = getReadableDatabase().rawQuery("SELECT COUNT(*) FROM FAVORITE WHERE LINK=? AND ISSUE=?", new String[]{article.getLink(), article.getIssue()});
+        cursor.moveToNext();
+        int count = cursor.getInt(0);
+        cursor.close();
+        return count > 0;
+    }
+
+    public void save(Article article) {
+        if (!contains(article)) {
+            ContentValues cv = new ContentValues();
+            cv.put("TITLE", article.getTitle());
+            cv.put("BRIEF", article.getBrief());
+            cv.put("LINK", article.getLink());
+            cv.put("IMAGE_URL", article.getImageUrl());
+            cv.put("DOMAIN", article.getDomain());
+            cv.put("ISSUE", article.getIssue());
+            cv.put("SECTION", article.getSection());
+            cv.put("TYPE", 0);// TODO add type for article
+            cv.put("TIME", System.currentTimeMillis());
+            getWritableDatabase().insert("FAVORITE", null, cv);
+        }
+    }
+
+    public void delete(Article article) {
+        getWritableDatabase().delete("FAVORITE", "LINK=? AND ISSUE=?", new String[]{article.getLink(), article.getIssue()});
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        // 不创建一个与Article的外键引用是因为Article表是cache，可能会被清除。
+        db.execSQL("CREATE TABLE IF NOT EXISTS FAVORITE(" +
+                "ID INTEGER PRIMARY KEY AUTOINCREMENT, " +
+                "TITLE VARCHAR(255), " +
+                "BRIEF TEXT, " +
+                "LINK VARCHAR(255), " +
+                "IMAGE_URL VARCHAR(255), " +
+                "DOMAIN VARCHAR(255), " +
+                "ISSUE VARCHAR(255), " +
+                "SECTION VARCHAR(255), " +
+                "TYPE INTEGER, " +
+                "TIME INTEGER)");
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+
+    }
+}

app/src/main/java/com/github/mzule/androidweekly/dao/FavoriteKeeper.java

@@ -11,7 +11,7 @@
 import android.webkit.WebViewClient;
 
 import com.github.mzule.androidweekly.R;
-import com.github.mzule.androidweekly.dao.FavoriteKeeper;
+import com.github.mzule.androidweekly.dao.FavoriteDao;
 import com.github.mzule.androidweekly.dao.TextZoomKeeper;
 import com.github.mzule.androidweekly.entity.Article;
 import com.github.mzule.androidweekly.ui.view.ProgressView;
@@ -35,6 +35,7 @@ public class ArticleActivity extends BaseActivity {
     private Article article;
     private WebSettings settings;
     private boolean changed;
+    private FavoriteDao favoriteDao;
 
     public static Intent makeIntent(Context context, Article article) {
         Intent intent = new Intent(context, ArticleActivity.class);
@@ -47,9 +48,9 @@ void favorite(View v) {
         changed = true;
         v.setSelected(!v.isSelected());
         if (v.isSelected()) {
-            FavoriteKeeper.save(article);
+            favoriteDao.save(article);
         } else {
-            FavoriteKeeper.delete(article);
+            favoriteDao.delete(article);
         }
         drawerLayout.closeDrawers();
     }
@@ -83,6 +84,7 @@ void share() {
     @SuppressLint("SetJavaScriptEnabled")
     @Override
     protected void afterInject() {
+        favoriteDao = new FavoriteDao();
         article = (Article) getIntent().getSerializableExtra("article");
         settings = webView.getSettings();
         webView.loadUrl(article.getLink());
@@ -94,7 +96,7 @@ public void onPageFinished(WebView view, String url) {
         });
         settings.setTextZoom(TextZoomKeeper.read(settings.getTextZoom()));
         settings.setJavaScriptEnabled(true);
-        favoriteButton.setSelected(FavoriteKeeper.contains(article));
+        favoriteButton.setSelected(favoriteDao.contains(article));
     }
 
     @Override

app/src/main/java/com/github/mzule/androidweekly/ui/activity/ArticleActivity.java

@@ -7,7 +7,7 @@
 import android.widget.ListView;
 
 import com.github.mzule.androidweekly.R;
-import com.github.mzule.androidweekly.dao.FavoriteKeeper;
+import com.github.mzule.androidweekly.dao.FavoriteDao;
 import com.github.mzule.androidweekly.entity.Article;
 import com.github.mzule.androidweekly.entity.Favorite;
 import com.github.mzule.androidweekly.ui.adapter.ArticleAdapter;
@@ -26,6 +26,7 @@ public class FavoriteActivity extends BaseActivity {
     private static final int REQUEST_CODE_OPEN_ARTICLE = 0x1;
     @Bind(R.id.listView)
     ListView listView;
+    private FavoriteDao favoriteDao;
     private ArticleAdapter adapter;
 
     public static Intent makeIntent(Context context) {
@@ -40,13 +41,14 @@ void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 
     @Override
     protected void afterInject() {
+        favoriteDao = new FavoriteDao();
         adapter = new ArticleAdapter(this);
         listView.setAdapter(adapter);
         renderFavorites();
     }
 
     private void renderFavorites() {
-        List<Favorite> favorites = FavoriteKeeper.read();
+        List<Favorite> favorites = favoriteDao.read();
         adapter.clear();
         adapter.addAndNotify(extract(favorites));
     }