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/*
* 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.app.grid;
import android.os.Bundle;
import android.os.Handler;
import android.support.v17.leanback.app.VerticalGridFragment;
import android.support.v17.leanback.supportleanbackshowcase.R;
import android.support.v17.leanback.supportleanbackshowcase.utils.Utils;
import android.support.v17.leanback.supportleanbackshowcase.models.CardRow;
import android.support.v17.leanback.supportleanbackshowcase.cards.presenters.CardPresenterSelector;
import android.support.v17.leanback.widget.ArrayObjectAdapter;
import android.support.v17.leanback.widget.FocusHighlight;
import android.support.v17.leanback.widget.PresenterSelector;
import android.support.v17.leanback.widget.VerticalGridPresenter;
import com.google.gson.Gson;
/**
* An example how to use leanback's {@link VerticalGridFragment}.
*/
public class GridExampleFragment extends VerticalGridFragment {
private static final int COLUMNS = 4;
private static final int ZOOM_FACTOR = FocusHighlight.ZOOM_FACTOR_MEDIUM;
private ArrayObjectAdapter mAdapter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(getString(R.string.grid_example_title));
setupRowAdapter();
}
private void setupRowAdapter() {
VerticalGridPresenter gridPresenter = new VerticalGridPresenter(ZOOM_FACTOR);
gridPresenter.setNumberOfColumns(COLUMNS);
setGridPresenter(gridPresenter);
PresenterSelector cardPresenterSelector = new CardPresenterSelector(getActivity());
mAdapter = new ArrayObjectAdapter(cardPresenterSelector);
setAdapter(mAdapter);
prepareEntranceTransition();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
createRows();
startEntranceTransition();
}
}, 1000);
}
private void createRows() {
String json = Utils.inputStreamToString(getResources()
.openRawResource(R.raw.grid_example));
CardRow row = new Gson().fromJson(json, CardRow.class);
mAdapter.addAll(0, row.getCards());
}
}
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