us.shandian.blacklight.ui.friendships.FriendsFragment.java Source code

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Here is the source code for us.shandian.blacklight.ui.friendships.FriendsFragment.java

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/* 
 * Copyright (C) 2014 Peter Cai
 *
 * This file is part of BlackLight
 *
 * BlackLight 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.
 *
 * BlackLight 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 BlackLight.  If not, see <http://www.gnu.org/licenses/>.
 */

package us.shandian.blacklight.ui.friendships;

import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.LayoutInflater;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ListView;

import android.support.v4.widget.SwipeRefreshLayout;

import us.shandian.blacklight.R;
import us.shandian.blacklight.api.friendships.FriendsApi;
import us.shandian.blacklight.model.UserListModel;
import us.shandian.blacklight.support.AsyncTask;
import us.shandian.blacklight.support.adapter.UserAdapter;
import us.shandian.blacklight.ui.common.SwipeUpAndDownRefreshLayout;
import us.shandian.blacklight.ui.statuses.UserTimeLineActivity;

public class FriendsFragment extends Fragment
        implements SwipeRefreshLayout.OnRefreshListener, AdapterView.OnItemClickListener {
    private String mUid;
    protected UserListModel mUsers;
    private int mNextCursor = 0;
    private boolean mRefreshing = false;

    private ListView mList;
    private UserAdapter mAdapter;
    private SwipeUpAndDownRefreshLayout mSwipeRefresh;

    public FriendsFragment() {
        this(null);
    }

    public FriendsFragment(String uid) {
        mUid = uid;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Share the layout of Home Time Line
        ViewGroup v = (ViewGroup) inflater.inflate(R.layout.home_timeline, null);

        // Init
        mList = (ListView) v.findViewById(R.id.home_timeline);
        mUsers = new UserListModel();
        mAdapter = new UserAdapter(getActivity(), mUsers);
        mList.setAdapter(mAdapter);
        mList.setOnItemClickListener(this);
        mSwipeRefresh = new SwipeUpAndDownRefreshLayout(getActivity());

        // Move child to SwipeRefreshLayout, and add SwipeRefreshLayout to root view
        v.removeViewInLayout(mList);
        v.addView(mSwipeRefresh, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        mSwipeRefresh.addView(mList, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);

        mSwipeRefresh.setOnRefreshListener(this);
        mSwipeRefresh.setColorScheme(R.color.ptr_green, R.color.ptr_orange, R.color.ptr_red, R.color.ptr_blue);

        if (mUid != null) {
            onRefresh();
        }

        return v;
    }

    @Override
    public void onRefresh() {
        if (!mRefreshing) {
            new Refresher().execute(!mSwipeRefresh.isDown());
        }
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Intent i = new Intent();
        i.setAction(Intent.ACTION_MAIN);
        i.setClass(getActivity(), UserTimeLineActivity.class);
        i.putExtra("user", mUsers.get(position));
        startActivity(i);
    }

    protected void doRefresh(boolean param) {
        if (param) {
            mNextCursor = 0;
            mUsers.getList().clear();
        }

        UserListModel usr = FriendsApi.getFriendsOf(mUid, 50, mNextCursor);

        if (usr != null) {
            int nextCursor = Integer.parseInt(usr.next_cursor);
            if (param || mNextCursor != 0) {
                mNextCursor = nextCursor;
                mUsers.addAll(param, usr);
            }
        }

    }

    private class Refresher extends AsyncTask<Boolean, Void, Boolean> {
        @Override
        protected void onPreExecute() {
            mRefreshing = true;
            mSwipeRefresh.setRefreshing(true);
        }

        @Override
        protected Boolean doInBackground(Boolean... params) {
            doRefresh(params[0]);

            return params[0];
        }

        @Override
        protected void onPostExecute(Boolean result) {
            if (result) {
                mAdapter.notifyDataSetChangedAndClear();
            } else {
                mAdapter.notifyDataSetChanged();
            }

            mRefreshing = false;
            mSwipeRefresh.setRefreshing(false);
        }
    }
}