com.nadmm.airports.ListFragmentBase.java Source code

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Here is the source code for com.nadmm.airports.ListFragmentBase.java

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/*
 * FlightIntel for Pilots
 *
 * Copyright 2011-2016 Nadeem Hasan <nhasan@nadmm.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.nadmm.airports;

import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.content.ContextCompat;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.CursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;

public abstract class ListFragmentBase extends FragmentBase {

    private static final String LISTVIEW_STATE = "LISTVIEW_STATE";

    private ListView mListView;
    private String mEmptyText;
    private Parcelable mListViewState;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (savedInstanceState != null && savedInstanceState.containsKey(LISTVIEW_STATE)) {
            mListViewState = savedInstanceState.getParcelable(LISTVIEW_STATE);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.list_view_layout, container, false);
        mListView = (ListView) view.findViewById(android.R.id.list);
        mListView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                onListItemClick(mListView, view, position);
            }
        });
        mListView.setCacheColorHint(ContextCompat.getColor(getActivity(), android.R.color.white));

        return createContentView(view);
    }

    @Override
    public void onDestroy() {
        if (mListView != null) {
            ListAdapter adapter = mListView.getAdapter();
            if (adapter != null && adapter instanceof CursorAdapter) {
                Cursor c = ((CursorAdapter) adapter).getCursor();
                c.close();
            }
        }

        super.onDestroy();
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        setFragmentContentShownNoAnimation(false);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        if (mListView != null) {
            mListViewState = mListView.onSaveInstanceState();
            outState.putParcelable(LISTVIEW_STATE, mListViewState);
        }
    }

    @Override
    public boolean canSwipeRefreshChildScrollUp() {
        return ViewCompat.canScrollVertically(mListView, -1);
    }

    @Override
    protected void applyContentTopClearance(int clearance) {
        mListView.setPadding(mListView.getPaddingLeft(), clearance, mListView.getPaddingRight(),
                mListView.getPaddingBottom());
    }

    protected void setCursor(Cursor c) {
        if (getActivity() == null) {
            // We may get called here after activity has detached
            c.close();
            return;
        }

        CursorAdapter adapter = (CursorAdapter) mListView.getAdapter();
        if (adapter == null) {
            adapter = newListAdapter(getActivity(), c);
            setAdapter(adapter);
        } else {
            adapter.changeCursor(c);
            setListShown(c.getCount() > 0);
        }
    }

    public void setAdapter(ListAdapter adapter) {
        mListView.setAdapter(adapter);

        int count = adapter == null ? 0 : adapter.getCount();
        setListShown(count > 0);

        if (mListViewState != null) {
            mListView.onRestoreInstanceState(mListViewState);
            mListViewState = null;
        }

        setFragmentContentShown(true);
    }

    public void setEmptyText(String text) {
        mEmptyText = text;
    }

    public void setListShown(boolean show) {
        TextView tv = (TextView) findViewById(android.R.id.empty);
        if (show) {
            tv.setVisibility(View.GONE);
            mListView.setVisibility(View.VISIBLE);
        } else {
            tv.setText(mEmptyText);
            tv.setVisibility(View.VISIBLE);
            mListView.setVisibility(View.GONE);
        }
    }

    public ListAdapter getListAdapter() {
        return mListView != null ? mListView.getAdapter() : null;
    }

    public ListView getListView() {
        return mListView;
    }

    protected CursorAdapter newListAdapter(Context context, Cursor c) {
        return null;
    }

    abstract protected void onListItemClick(ListView l, View v, int position);

    @Override
    public void registerActionBarAutoHideView() {
        getActivityBase().registerActionBarAutoHideListView(getListView());
    }

}