package com.marshalchen.common.demoofui.staggeredgridview;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.util.Log;
import android.view.*;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.TextView;
import android.widget.Toast;
import com.marshalchen.common.demoofui.R;
import com.marshalchen.common.uimodule.staggeredgridview.StaggeredGridView;
import java.util.ArrayList;
public class StaggeredGridActivityFragment extends FragmentActivity {
private static final String TAG = "StaggeredGridActivityFragment";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle("SGV");
final FragmentManager fm = getSupportFragmentManager();
// Create the list fragment and add it as our sole content.
if (fm.findFragmentById(android.R.id.content) == null) {
final StaggeredGridFragment fragment = new StaggeredGridFragment();
fm.beginTransaction().add(android.R.id.content, fragment).commit();
}
}
private class StaggeredGridFragment extends Fragment implements
AbsListView.OnScrollListener, AbsListView.OnItemClickListener {
private StaggeredGridView mGridView;
private boolean mHasRequestedMore;
private SampleAdapter mAdapter;
private ArrayList<String> mData;
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Override
public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) {
return inflater.inflate(R.layout.staggered_grid_view_activity_sgv, container, false);
}
@Override
public void onActivityCreated(final Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mGridView = (StaggeredGridView) getView().findViewById(R.id.grid_view);
if (savedInstanceState == null) {
final LayoutInflater layoutInflater = getActivity().getLayoutInflater();
View header = layoutInflater.inflate(R.layout.staggered_grid_view_list_item_header_footer, null);
View footer = layoutInflater.inflate(R.layout.staggered_grid_view_list_item_header_footer, null);
TextView txtHeaderTitle = (TextView) header.findViewById(R.id.txt_title);
TextView txtFooterTitle = (TextView) footer.findViewById(R.id.txt_title);
txtHeaderTitle.setText("THE HEADER!");
txtFooterTitle.setText("THE FOOTER!");
mGridView.addHeaderView(header);
mGridView.addFooterView(footer);
}
if (mAdapter == null) {
mAdapter = new SampleAdapter(getActivity(), R.id.txt_line1);
}
if (mData == null) {
mData = SampleData.generateSampleData();
}
for (String data : mData) {
mAdapter.add(data);
}
mGridView.setAdapter(mAdapter);
mGridView.setOnScrollListener(this);
mGridView.setOnItemClickListener(this);
}
@Override
public void onScrollStateChanged(final AbsListView view, final int scrollState) {
Log.d(TAG, "onScrollStateChanged:" + scrollState);
}
@Override
public void onScroll(final AbsListView view, final int firstVisibleItem, final int visibleItemCount, final int totalItemCount) {
Log.d(TAG, "onScroll firstVisibleItem:" + firstVisibleItem +
" visibleItemCount:" + visibleItemCount +
" totalItemCount:" + totalItemCount);
// our handling
if (!mHasRequestedMore) {
int lastInScreen = firstVisibleItem + visibleItemCount;
if (lastInScreen >= totalItemCount) {
Log.d(TAG, "onScroll lastInScreen - so load more");
mHasRequestedMore = true;
onLoadMoreItems();
}
}
}
private void onLoadMoreItems() {
final ArrayList<String> sampleData = SampleData.generateSampleData();
for (String data : sampleData) {
mAdapter.add(data);
}
// stash all the data in our backing store
mData.addAll(sampleData);
// notify the adapter that we can update now
mAdapter.notifyDataSetChanged();
mHasRequestedMore = false;
}
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
Toast.makeText(getActivity(), "Item Clicked: " + position, Toast.LENGTH_SHORT).show();
}
}
}