package com.lincanbin.carbonforum;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.support.design.widget.Snackbar;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
import com.lincanbin.carbonforum.adapter.PostAdapter;
import com.lincanbin.carbonforum.application.CarbonForumApplication;
import com.lincanbin.carbonforum.config.APIAddress;
import com.lincanbin.carbonforum.util.HttpUtil;
import com.lincanbin.carbonforum.util.JSONUtil;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class NotificationsActivity extends AppCompatActivity{
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
private SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {@link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_notifications);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
ImageButton imageButton = (ImageButton) toolbar.findViewById(R.id.notifications_settings_button);
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(NotificationsActivity.this, SettingsActivity.class);
intent.putExtra(PreferenceActivity.EXTRA_SHOW_FRAGMENT, SettingsActivity.NotificationPreferenceFragment.class.getName());
intent.putExtra(PreferenceActivity.EXTRA_NO_HEADERS, true);
startActivity(intent);
}
});
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
@Override
public int getCount() {
// Show 2 total pages.
return 2;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return getString(R.string.notifications_mentioned_me);
case 1:
return getString(R.string.notifications_replied_to_me);
}
return null;
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment{
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "notifications_type";
private static View rootView;
private static SwipeRefreshLayout mSwipeRefreshLayout;
private static RecyclerView mRecyclerView;
private static PostAdapter mAdapter;
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final int type = getArguments().getInt(ARG_SECTION_NUMBER);
rootView = inflater.inflate(R.layout.fragment_notifications, container, false);
mSwipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.activity_notifications_swipe_refresh_layout);
mSwipeRefreshLayout.setColorSchemeResources(
R.color.material_light_blue_700,
R.color.material_red_700,
R.color.material_orange_700,
R.color.material_light_green_700
);
//RecyclerView
mRecyclerView = (RecyclerView) rootView.findViewById(R.id.notifications_list);
mRecyclerView.setHasFixedSize(true);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
//TODO 加载更多提醒
}
});
mRecyclerView.setLayoutManager(layoutManager);
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
mAdapter = new PostAdapter(getActivity(), true);
mAdapter.setData(new ArrayList<Map<String, Object>>());
mRecyclerView.setAdapter(mAdapter);
mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
new GetNotificationsTask(type, false, mSwipeRefreshLayout, mRecyclerView, mAdapter, 1).execute();
}
});
new GetNotificationsTask(type, true, mSwipeRefreshLayout, mRecyclerView, mAdapter, 1).execute();
return rootView;
}
public class GetNotificationsTask extends AsyncTask<Void, Void, JSONObject> {
private int targetPage;
private int type;
private String keyName;
private Boolean loadFromCache;
private SwipeRefreshLayout mSwipeRefreshLayout;
private RecyclerView mRecyclerView;
private PostAdapter mAdapter;
public GetNotificationsTask(int type,
Boolean loadFromCache,
SwipeRefreshLayout mSwipeRefreshLayout,
RecyclerView mRecyclerView,
PostAdapter mAdapter,
int targetPage) {
this.targetPage = targetPage;
this.type = type;
this.keyName = type == 1 ? "ReplyArray" : "MentionArray";
this.loadFromCache = loadFromCache;
this.mSwipeRefreshLayout = mSwipeRefreshLayout;
this.mRecyclerView = mRecyclerView;
this.mAdapter = mAdapter;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
if(!loadFromCache) {
mSwipeRefreshLayout.post(new Runnable() {
@Override
public void run() {
mSwipeRefreshLayout.setRefreshing(true);
}
});
}
}
@Override
protected void onPostExecute(JSONObject jsonObject) {
super.onPostExecute(jsonObject);
int status = 0;
if(loadFromCache){
status = 1;
}
//先保存缓存
if(jsonObject != null && !loadFromCache){
try {
status = jsonObject.getInt("Status");
SharedPreferences.Editor cacheEditor = CarbonForumApplication.cacheSharedPreferences.edit();
//cacheEditor.putString("notifications" + keyName + "Cache", jsonObject.toString(0));
cacheEditor.putString("notificationsMentionArrayCache", jsonObject.toString(0));
cacheEditor.putString("notificationsReplyArrayCache", jsonObject.toString(0));
cacheEditor.apply();
}catch(Exception e){
e.printStackTrace();
}
}
//更新界面
List<Map<String, Object>> list;
list = JSONUtil.jsonObject2List(jsonObject, keyName);
//防止异步任务未完成时，用户按下返回，Fragment被GC，造成NullPointer
if(mRecyclerView != null && mSwipeRefreshLayout !=null && mAdapter != null && rootView != null && getActivity() != null) {
mSwipeRefreshLayout.setRefreshing(false);
Log.d("Status : ", keyName + String.valueOf(status));
if (status == 1) {
if(list != null && !list.isEmpty()){
Log.d("Action : ", keyName + " SetData");
mAdapter.setData(list);
mAdapter.notifyDataSetChanged();
}else{
//新注册用户，网络正常但是当前无任何通知，做个提示
Snackbar.make(rootView, R.string.empty_notification, Snackbar.LENGTH_LONG).setAction("Action", null).show();
}
} else {
Snackbar.make(rootView, R.string.network_error, Snackbar.LENGTH_LONG).setAction("Action", null).show();
}
}
//在提及我的的Tab中，从缓存中加载一次后，再从网络上更新一次
if(type == 1 && loadFromCache){
new GetNotificationsTask(type, false, mSwipeRefreshLayout, mRecyclerView, mAdapter, 1).execute();
}
}
@Override
protected JSONObject doInBackground(Void... params) {
if(loadFromCache){
return JSONUtil.jsonString2Object(
CarbonForumApplication.cacheSharedPreferences.
getString("notifications" + keyName + "Cache", "{\"Status\":1, \"" + keyName + "\":[]}")
);
}else {
return HttpUtil.postRequest(getActivity(), APIAddress.NOTIFICATIONS_URL, new HashMap<String, String>(), false, true);
}
}
}
}
}