1 files changed, 79 insertions, 0 deletions
diff --git a/samples/SupportLeanbackShowcase/app/src/main/java/android/support/v17/leanback/supportleanbackshowcase/cards/presenters/AbstractCardPresenter.java b/samples/SupportLeanbackShowcase/app/src/main/java/android/support/v17/leanback/supportleanbackshowcase/cards/presenters/AbstractCardPresenter.java
new file mode 100644
index 000000000..0301cdc1c
--- /dev/null
+++ b/samples/SupportLeanbackShowcase/app/src/main/java/android/support/v17/leanback/supportleanbackshowcase/cards/presenters/AbstractCardPresenter.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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 distributed under the License
+ * is distributed on an "AS IS" BASIS, 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 android.support.v17.leanback.supportleanbackshowcase.cards.presenters;
+
+import android.content.Context;
+import android.support.v17.leanback.supportleanbackshowcase.models.Card;
+import android.support.v17.leanback.widget.BaseCardView;
+import android.support.v17.leanback.widget.Presenter;
+import android.view.ViewGroup;
+
+/**
+ * This abstract, generic class will create and manage the
+ * ViewHolder and will provide typed Presenter callbacks such that you do not have to perform casts
+ * on your own.
+ *
+ * @param <CardViewType> The cards' View Type.
+ */
+public abstract class AbstractCardPresenter<CardViewType extends BaseCardView> extends Presenter {
+
+    private static final String TAG = "AbstractCardPresenter";
+    private final Context mContext;
+
+    /**
+     * @param context The current context.
+     */
+    public AbstractCardPresenter(Context context) {
+        mContext = context;
+    }
+
+    public Context getContext() {
+        return mContext;
+    }
+
+    @Override public final ViewHolder onCreateViewHolder(ViewGroup parent) {
+        CardViewType cardView = onCreateView();
+        return new ViewHolder(cardView);
+    }
+
+    @Override public final void onBindViewHolder(ViewHolder viewHolder, Object item) {
+        Card card = (Card) item;
+        onBindViewHolder(card, (CardViewType) viewHolder.view);
+    }
+
+    @Override public final void onUnbindViewHolder(ViewHolder viewHolder) {
+        onUnbindViewHolder((CardViewType) viewHolder.view);
+    }
+
+    public void onUnbindViewHolder(CardViewType cardView) {
+        // Nothing to clean up. Override if necessary.
+    }
+
+    /**
+     * Invoked when a new view is created.
+     *
+     * @return Returns the newly created view.
+     */
+    protected abstract CardViewType onCreateView();
+
+    /**
+     * Implement this method to update your card's view with the data bound to it.
+     *
+     * @param card The model containing the data for the card.
+     * @param cardView The view the card is bound to.
+     * @see Presenter#onBindViewHolder(Presenter.ViewHolder, Object)
+     */
+    public abstract void onBindViewHolder(Card card, CardViewType cardView);
+
+}