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CustomHeadersFragment.java
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CustomHeadersFragment.java
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package com.sgottard.tvdemoapp;
import android.app.Fragment;
import android.os.Bundle;
import android.support.v17.leanback.app.HeadersFragment;
import android.support.v17.leanback.widget.ArrayObjectAdapter;
import android.support.v17.leanback.widget.HeaderItem;
import android.support.v17.leanback.widget.ListRow;
import android.support.v17.leanback.widget.OnItemSelectedListener;
import android.support.v17.leanback.widget.Row;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.LinkedHashMap;
/**
* Created by Sebastiano Gottardo on 08/11/14.
*/
public class CustomHeadersFragment extends HeadersFragment {
private ArrayObjectAdapter adapter;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
customSetBackground(R.color.fastlane_background);
setOnItemSelectedListener(getDefaultItemSelectedListener());
setHeaderAdapter();
setCustomPadding();
}
private void setHeaderAdapter() {
adapter = new ArrayObjectAdapter();
LinkedHashMap<Integer, CustomRowsFragment> fragments = ((TVDemoActivity) getActivity()).getFragments();
int id = 0;
for (int i = 0; i < fragments.size(); i++) {
HeaderItem header = new HeaderItem(id, "Category " + i, null);
ArrayObjectAdapter innerAdapter = new ArrayObjectAdapter();
innerAdapter.add(fragments.get(i));
adapter.add(id, new ListRow(header, innerAdapter));
id++;
}
setAdapter(adapter);
}
private void setCustomPadding() {
getView().setPadding(0, Utils.dpToPx(128, getActivity()), Utils.dpToPx(48, getActivity()), 0);
}
private OnItemSelectedListener getDefaultItemSelectedListener() {
return new OnItemSelectedListener() {
@Override
public void onItemSelected(Object o, Row row) {
Object obj = ((ListRow) row).getAdapter().get(0);
getFragmentManager().beginTransaction().replace(R.id.rows_container, (Fragment) obj).commit();
((TVDemoActivity) getActivity()).updateCurrentRowsFragment((CustomRowsFragment) obj);
}
};
}
/**
* Since the original setBackgroundColor is private, we need to
* access it via reflection
*
* @param colorResource The colour resource
*/
private void customSetBackground(int colorResource) {
try {
Class clazz = HeadersFragment.class;
Method m = clazz.getDeclaredMethod("setBackgroundColor", Integer.TYPE);
m.setAccessible(true);
m.invoke(this, getResources().getColor(colorResource));
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}