com.atguigu.android.android_pulltorefresh.PullToRefreshListFragmentActivity.java Source code

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Here is the source code for com.atguigu.android.android_pulltorefresh.PullToRefreshListFragmentActivity.java

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/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.
 *
 * 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 com.atguigu.android.android_pulltorefresh;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.atguigu.android.R;
import com.handmark.pulltorefresh.extras.listfragment.PullToRefreshListFragment;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

import java.util.Arrays;
import java.util.LinkedList;

public final class PullToRefreshListFragmentActivity extends FragmentActivity
        implements OnRefreshListener<ListView> {

    private LinkedList<String> mListItems;
    private ArrayAdapter<String> mAdapter;

    private PullToRefreshListFragment mPullRefreshListFragment;
    private PullToRefreshListView mPullRefreshListView;
    private TextView tv_title;

    private String[] mStrings = { "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "Abondance", "Ackawi",
            "Acorn", "Adelost", "Affidelice au Chablis", "Afuega'l Pitu", "Airag", "Airedale", "Aisy Cendre",
            "Allgauer Emmentaler", "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "Abondance", "Ackawi",
            "Acorn", "Adelost", "Affidelice au Chablis", "Afuega'l Pitu", "Airag", "Airedale", "Aisy Cendre",
            "Allgauer Emmentaler" };

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ptr_list_fragment);

        tv_title = (TextView) findViewById(R.id.tv_title);
        tv_title.setText("PullToRefreshListFragment");

        //getSupportFragmentManager().findFragmentById(id);Fragment
        mPullRefreshListFragment = (PullToRefreshListFragment) getSupportFragmentManager()
                .findFragmentById(R.id.frag_ptr_list);

        // Get PullToRefreshListView from Fragment
        mPullRefreshListView = mPullRefreshListFragment.getPullToRefreshListView();

        // Set a listener to be invoked when the list should be refreshed.
        //?
        mPullRefreshListView.setOnRefreshListener(this);

        // You can also just use mPullRefreshListFragment.getListView()
        ListView listview = mPullRefreshListView.getRefreshableView();

        mListItems = new LinkedList<String>();
        //?
        mListItems.addAll(Arrays.asList(mStrings));
        mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mListItems);

        // You can also just use setListAdapter(mAdapter) or
        // mPullRefreshListView.setAdapter(mAdapter)
        listview.setAdapter(mAdapter);

        mPullRefreshListFragment.setListShown(true);
    }

    //
    @Override
    public void onRefresh(PullToRefreshBase<ListView> refreshView) {
        // Do work to refresh the list here.
        new GetDataTask().execute();
    }

    private class GetDataTask extends AsyncTask<Void, Void, String[]> {

        @Override
        protected String[] doInBackground(Void... params) {
            // Simulates a background job.
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
            }
            return mStrings;
        }

        @Override
        protected void onPostExecute(String[] result) {
            mListItems.addFirst("?...");
            mAdapter.notifyDataSetChanged();

            // Call onRefreshComplete when the list has been refreshed.
            mPullRefreshListView.onRefreshComplete();

            super.onPostExecute(result);
        }
    }

}