Implemented the CardContentLoader

- Implemented the CardContentLoader
- Refactored the CardLoader and increased the code readable
- Added try-with-resource
- Removed all custom card codes
- Modified ContextualCardManager to add CardContentLoaderCallbacks

Bug: 112521307
Test: robotest
Change-Id: Ieb9cdeaacdfb8fdae9747c60395206d15af034c1

src/com/android/settings/homepage/CardContentLoader.java

@@ -17,46 +17,58 @@
 package com.android.settings.homepage;
 
 import android.content.Context;
+import android.database.Cursor;
 
 import androidx.annotation.Nullable;
 
 import com.android.settingslib.utils.AsyncLoaderCompat;
 
+import java.util.ArrayList;
 import java.util.List;
 
-//TODO(b/112521307): Implement this to make it work with the card database.
-public class CardContentLoader {
+public class CardContentLoader extends AsyncLoaderCompat<List<ContextualCard>> {
+    static final int CARD_CONTENT_LOADER_ID = 1;
 
-    private static final String TAG = "CardContentLoader";
-
-    private CardContentLoaderListener mListener;
+    private Context mContext;
 
     public interface CardContentLoaderListener {
         void onFinishCardLoading(List<ContextualCard> contextualCards);
     }
 
-    public CardContentLoader() {
+    CardContentLoader(Context context) {
+        super(context);
+        mContext = context.getApplicationContext();
     }
 
-    void setListener(CardContentLoaderListener listener) {
-        mListener = listener;
+    @Override
+    protected void onDiscardResult(List<ContextualCard> result) {
+
     }
 
-    private static class CardLoader extends AsyncLoaderCompat<List<ContextualCard>> {
-
-        public CardLoader(Context context) {
-            super(context);
+    @Nullable
+    @Override
+    public List<ContextualCard> loadInBackground() {
+        List<ContextualCard> result;
+        try (Cursor cursor = CardDatabaseHelper.getInstance(mContext).getAllContextualCards()) {
+            if (cursor.getCount() == 0) {
+                //TODO(b/113372471): Load Default static cards and return 3 static cards
+                return new ArrayList<>();
+            }
+            result = buildContextualCardList(cursor);
         }
+        return result;
+    }
 
-        @Override
-        protected void onDiscardResult(List<ContextualCard> result) {
-
-        }
-
-        @Nullable
-        @Override
-        public List<ContextualCard> loadInBackground() {
-            return null;
+    private List<ContextualCard> buildContextualCardList(Cursor cursor) {
+        final List<ContextualCard> result = new ArrayList<>();
+        for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()) {
+            final ContextualCard card = new ContextualCard(cursor);
+            if (card.isCustomCard()) {
+                //TODO(b/114688391): Load and generate custom card,then add into list
+            } else {
+                result.add(card);
+            }
         }
+        return result;
     }
 }

src/com/android/settings/homepage/CardDatabaseHelper.java

@@ -17,6 +17,7 @@
 package com.android.settings.homepage;
 
 import android.content.Context;
+import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
 import android.util.Log;
@@ -190,4 +191,12 @@ public class CardDatabaseHelper extends SQLiteOpenHelper {
         }
         return sCardDatabaseHelper;
     }
+
+    Cursor getAllContextualCards() {
+        final SQLiteDatabase db = this.getReadableDatabase();
+        Cursor cursor = db.query(CARD_TABLE, null /* columns */, null /* selection */,
+                null /* selectionArgs */, null /* groupBy */, null /* having */,
+                null /* orderBy */);
+        return cursor;
+    }
 }

src/com/android/settings/homepage/ContextualCard.java

@@ -17,6 +17,7 @@
 package com.android.settings.homepage;
 
 import android.annotation.IntDef;
+import android.database.Cursor;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.text.TextUtils;
@@ -58,8 +59,8 @@ public class ContextualCard {
     private final int mIconResId;
     private final int mCardAction;
     private final long mExpireTimeMS;
-    private final Drawable mIconDrawable;
     private final boolean mIsHalfWidth;
+    private final Drawable mIconDrawable;
 
     String getName() {
         return mName;
@@ -137,6 +138,10 @@ public class ContextualCard {
         return mIsHalfWidth;
     }
 
+    boolean isCustomCard() {
+        return TextUtils.isEmpty(mSliceUri);
+    }
+
     public ContextualCard(Builder builder) {
         mName = builder.mName;
         mCardType = builder.mCardType;
@@ -158,6 +163,31 @@ public class ContextualCard {
         mIsHalfWidth = builder.mIsHalfWidth;
     }
 
+    ContextualCard(Cursor c) {
+        mName = c.getString(c.getColumnIndex(CardDatabaseHelper.CardColumns.NAME));
+        mCardType = c.getInt(c.getColumnIndex(CardDatabaseHelper.CardColumns.TYPE));
+        mRankingScore = c.getDouble(c.getColumnIndex(CardDatabaseHelper.CardColumns.SCORE));
+        mSliceUri = c.getString(c.getColumnIndex(CardDatabaseHelper.CardColumns.SLICE_URI));
+        mCategory = c.getInt(c.getColumnIndex(CardDatabaseHelper.CardColumns.CATEGORY));
+        mLocalizedToLocale = c.getString(
+                c.getColumnIndex(CardDatabaseHelper.CardColumns.LOCALIZED_TO_LOCALE));
+        mPackageName = c.getString(c.getColumnIndex(CardDatabaseHelper.CardColumns.PACKAGE_NAME));
+        mAppVersion = c.getString(c.getColumnIndex(CardDatabaseHelper.CardColumns.APP_VERSION));
+        mTitleResName = c.getString(
+                c.getColumnIndex(CardDatabaseHelper.CardColumns.TITLE_RES_NAME));
+        mTitleText = c.getString(c.getColumnIndex(CardDatabaseHelper.CardColumns.TITLE_TEXT));
+        mSummaryResName = c.getString(
+                c.getColumnIndex(CardDatabaseHelper.CardColumns.SUMMARY_RES_NAME));
+        mSummaryText = c.getString(c.getColumnIndex(CardDatabaseHelper.CardColumns.SUMMARY_TEXT));
+        mIconResName = c.getString(c.getColumnIndex(CardDatabaseHelper.CardColumns.ICON_RES_NAME));
+        mIconResId = c.getInt(c.getColumnIndex(CardDatabaseHelper.CardColumns.ICON_RES_ID));
+        mCardAction = c.getInt(c.getColumnIndex(CardDatabaseHelper.CardColumns.CARD_ACTION));
+        mExpireTimeMS = c.getLong(c.getColumnIndex(CardDatabaseHelper.CardColumns.EXPIRE_TIME_MS));
+        mIsHalfWidth = (c.getInt(
+                c.getColumnIndex(CardDatabaseHelper.CardColumns.SUPPORT_HALF_WIDTH)) == 1);
+        mIconDrawable = null;
+    }
+
     @Override
     public int hashCode() {
         return mName.hashCode();

src/com/android/settings/homepage/ContextualCardManager.java

@@ -16,9 +16,17 @@
 
 package com.android.settings.homepage;
 
+import static com.android.settings.homepage.CardContentLoader.CARD_CONTENT_LOADER_ID;
+
 import android.content.Context;
+import android.os.Bundle;
 import android.widget.BaseAdapter;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.loader.app.LoaderManager;
+import androidx.loader.content.Loader;
+
 import com.android.settingslib.core.lifecycle.Lifecycle;
 import com.android.settingslib.core.lifecycle.LifecycleObserver;
 
@@ -60,9 +68,12 @@ public class ContextualCardManager implements CardContentLoader.CardContentLoade
         mControllerRendererPool = new ControllerRendererPool();
     }
 
-    void startCardContentLoading() {
-        final CardContentLoader cardContentLoader = new CardContentLoader();
-        cardContentLoader.setListener(this);
+    void startCardContentLoading(PersonalSettingsFragment fragment) {
+        final CardContentLoaderCallbacks cardContentLoaderCallbacks =
+                new CardContentLoaderCallbacks(mContext);
+        cardContentLoaderCallbacks.setListener(this);
+        LoaderManager.getInstance(fragment).initLoader(CARD_CONTENT_LOADER_ID, null /* bundle */,
+                cardContentLoaderCallbacks);
     }
 
     private void loadCardControllers() {
@@ -140,4 +151,43 @@ public class ContextualCardManager implements CardContentLoader.CardContentLoade
     public ControllerRendererPool getControllerRendererPool() {
         return mControllerRendererPool;
     }
+
+
+    static class CardContentLoaderCallbacks implements
+            LoaderManager.LoaderCallbacks<List<ContextualCard>> {
+
+        private Context mContext;
+        private CardContentLoader.CardContentLoaderListener mListener;
+
+        CardContentLoaderCallbacks(Context context) {
+            mContext = context.getApplicationContext();
+        }
+
+        protected void setListener(CardContentLoader.CardContentLoaderListener listener) {
+            mListener = listener;
+        }
+
+        @NonNull
+        @Override
+        public Loader<List<ContextualCard>> onCreateLoader(int id, @Nullable Bundle bundle) {
+            if (id == CARD_CONTENT_LOADER_ID) {
+                return new CardContentLoader(mContext);
+            } else {
+                throw new IllegalArgumentException("Unknown loader id: " + id);
+            }
+        }
+
+        @Override
+        public void onLoadFinished(@NonNull Loader<List<ContextualCard>> loader,
+                List<ContextualCard> contextualCards) {
+            if (mListener != null) {
+                mListener.onFinishCardLoading(contextualCards);
+            }
+        }
+
+        @Override
+        public void onLoaderReset(@NonNull Loader<List<ContextualCard>> loader) {
+
+        }
+    }
 }

src/com/android/settings/homepage/PersonalSettingsFragment.java

@@ -43,7 +43,7 @@ public class PersonalSettingsFragment extends InstrumentedFragment {
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         mContextualCardManager = new ContextualCardManager(getContext(), getSettingsLifecycle());
-        mContextualCardManager.startCardContentLoading();
+        mContextualCardManager.startCardContentLoading(this);
     }
 
     @Override