/*
* The MIT License (MIT)
* Copyright (c) 2014 longkai
* The software shall be used for good, not evil.
*/
package org.catnut.fragment;
import android.app.ActionBar;
import android.content.Intent;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.os.Handler;
import android.provider.BaseColumns;
import android.util.Log;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.Toast;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import org.catnut.R;
import org.catnut.adapter.ConversationAdapter;
import org.catnut.api.CommentsAPI;
import org.catnut.core.CatnutAPI;
import org.catnut.core.CatnutProvider;
import org.catnut.core.CatnutRequest;
import org.catnut.metadata.Comment;
import org.catnut.metadata.Status;
import org.catnut.metadata.User;
import org.catnut.processor.StatusProcessor;
import org.catnut.ui.TweetActivity;
import org.catnut.util.CatnutUtils;
import org.catnut.util.Constants;
import org.json.JSONArray;
import org.json.JSONObject;
/**
* 会话列表视图
*
* @author longkai
*/
public class ConversationFragment extends TimelineFragment {
public static final String TAG = ConversationFragment.class.getSimpleName();
private static final String[] PROJECTION = new String[]{
"c." + BaseColumns._ID,
"c." + Comment.created_at,
Comment.columnText,
Comment.status,
Comment.reply_comment,
Comment.uid,
User.screen_name,
User.avatar_large,
User.remark,
};
private Handler mHandler = new Handler();
private ConversationAdapter mAdapter;
private RequestQueue mRequestQueue;
private int mTotal;
public static ConversationFragment getFragment() {
return new ConversationFragment();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(false);
mRequestQueue = mApp.getRequestQueue();
mAdapter = new ConversationAdapter(getActivity());
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
// load it!
mSwipeRefreshLayout.setRefreshing(true);
if (savedInstanceState == null) {
String key = getString(R.string.pref_first_run);
boolean firstRun = mPreferences.getBoolean(key, true);
if (firstRun) {
refresh();
mPreferences.edit().putBoolean(key, false).commit();
} else if (mPreferences.getBoolean(getString(R.string.pref_keep_latest), true)) {
refresh();
} else {
initFromLocal();
}
} else {
initFromLocal();
}
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mListView.setAdapter(mAdapter);
}
@Override
public void onStart() {
super.onStart();
ActionBar bar = getActivity().getActionBar();
bar.setIcon(R.drawable.ic_action_conversation);
bar.setTitle(getString(R.string.received_reply));
}
@Override
public void onStop() {
super.onStop();
mRequestQueue.cancelAll(TAG);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Cursor c = (Cursor) mAdapter.getItem(position);
String status = c.getString(c.getColumnIndex(Comment.status));
Intent intent = new Intent(getActivity(), TweetActivity.class);
intent.putExtra(Constants.JSON, status);
startActivity(intent);
}
@Override
protected void refresh() {
// 检测一下是否网络已经连接，否则从本地加载
if (!isNetworkAvailable()) {
Toast.makeText(getActivity(), getString(R.string.network_unavailable), Toast.LENGTH_SHORT).show();
initFromLocal();
return;
}
// refresh!
final int size = getFetchSize();
(new Thread(new Runnable() {
@Override
public void run() {
// 这里需要注意一点，我们不需要最新的那条，而是需要(最新那条-数目)，否则你拿最新那条去刷新，球都没有返回Orz...
String query = CatnutUtils.buildQuery(
new String[]{BaseColumns._ID},
null,
Comment.TABLE,
null,
BaseColumns._ID + " desc",
size + ", 1" // limit x, y
);
Cursor cursor = getActivity().getContentResolver().query(
CatnutProvider.parse(Status.MULTIPLE),
null, query, null, null
);
// the cursor never null?
final long since_id;
if (cursor.moveToNext()) {
since_id = cursor.getLong(0);
} else {
since_id = 0;
}
cursor.close();
final CatnutAPI api = CommentsAPI.to_me(since_id, 0, getFetchSize(), 0, 0, 0);
// refresh...
mHandler.post(new Runnable() {
@Override
public void run() {
mRequestQueue.add(new CatnutRequest(
getActivity(),
api,
new StatusProcessor.Comments2MeProcessor(),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d(TAG, "refresh done...");
mTotal = response.optInt(TOTAL_NUMBER);
// 重新置换数据
JSONArray jsonArray = response.optJSONArray(Comment.MULTIPLE);
int newSize = jsonArray.length(); // 刷新，一切从新开始...
Bundle args = new Bundle();
args.putInt(TAG, newSize);
getLoaderManager().restartLoader(0, args, ConversationFragment.this);
}
},
errorListener
)).setTag(TAG);
}
});
}
})).start();
}
@Override
protected void loadMore(long max_id) {
// 加载更多，判断一下是从本地加载还是从远程加载
// 根据(偏好||是否有网络连接)
boolean fromCloud = mPreferences.getBoolean(
getString(R.string.pref_keep_latest),
getResources().getBoolean(R.bool.pref_load_more_from_cloud)
);
if (fromCloud && isNetworkAvailable()) {
// 如果用户要求最新的数据并且网络连接ok，那么从网络上加载数据
loadFromCloud(max_id);
} else {
// 从本地拿
loadFromLocal();
// 顺便更新一下本地的数据总数
new Thread(updateLocalCount).start();
}
}
private void initFromLocal() {
Bundle args = new Bundle();
args.putInt(TAG, getFetchSize());
getLoaderManager().initLoader(0, args, this);
new Thread(updateLocalCount).start();
}
private void loadFromLocal() {
Bundle args = new Bundle();
args.putInt(TAG, mAdapter.getCount() + getFetchSize());
getLoaderManager().restartLoader(0, args, this);
mSwipeRefreshLayout.setRefreshing(true);
}
private void loadFromCloud(long max_id) {
mSwipeRefreshLayout.setRefreshing(true);
CatnutAPI api = CommentsAPI.to_me(0, max_id, getFetchSize(), 0, 0, 0);
mRequestQueue.add(new CatnutRequest(
getActivity(),
api,
new StatusProcessor.Comments2MeProcessor(),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d(TAG, "load more from cloud done...");
mTotal = response.optInt(TOTAL_NUMBER);
int newSize = response.optJSONArray(Comment.MULTIPLE).length() + mAdapter.getCount();
Bundle args = new Bundle();
args.putInt(TAG, newSize);
getLoaderManager().restartLoader(0, args, ConversationFragment.this);
}
},
errorListener
)).setTag(TAG);
}
private Runnable updateLocalCount = new Runnable() {
@Override
public void run() {
String query = CatnutUtils.buildQuery(
new String[]{"count(0)"},
null,
Comment.TABLE,
null, null, null
);
Cursor cursor = getActivity().getContentResolver().query(
CatnutProvider.parse(Comment.MULTIPLE),
null,
query,
null, null
);
if (cursor.moveToNext()) {
mTotal = cursor.getInt(0);
}
cursor.close();
}
};
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
int limit = args.getInt(TAG, getFetchSize());
return CatnutUtils.getCursorLoader(
getActivity(),
CatnutProvider.parse(Comment.MULTIPLE),
PROJECTION,
null,
null,
Comment.TABLE + " as c",
"inner join " + User.TABLE + " as u on c.uid=u._id",
"c." + BaseColumns._ID + " desc",
String.valueOf(limit)
);
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
if (mSwipeRefreshLayout.isRefreshing()) {
mSwipeRefreshLayout.setRefreshing(false);
}
mAdapter.swapCursor(data);
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
mAdapter.swapCursor(null);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
super.onScrollStateChanged(view, scrollState);
boolean canLoading = SCROLL_STATE_IDLE == scrollState // 停住了，不滑动了
&& mListView.getLastVisiblePosition() == mAdapter.getCount() - 1 // 到底了
&& !mSwipeRefreshLayout.isRefreshing(); // 当前没有处在刷新状态
// && mAdapter.getCount() > 0; // 不是一开始
if (canLoading) {
// 可以加载更多，但是我们需要判断一下是否加载完了，没有更多了
if (mAdapter.getCount() >= mTotal) {
Log.d(TAG, "load all done...");
super.loadAllDone();
} else {
Log.d(TAG, "load...");
loadMore(mAdapter.getItemId(mAdapter.getCount() - 1));
}
} else {
Log.d(TAG, "cannot load more!");
}
}
@Override
public boolean onQueryTextChange(String newText) {
return false;
}
}
