Android Open Source - friendica-for-android Message View Fragment

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License

The source code is released under:
This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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Java Source Code

package de.wikilab.android.friendica01.fragment;
//  ww w.j a v  a2 s  .  c om
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashSet;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.WrapperListAdapter;

import com.handmark.pulltorefresh.library.PullToRefreshBase.OnLastItemVisibleListener;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

import de.wikilab.android.friendica01.Max;
import de.wikilab.android.friendica01.R;
import de.wikilab.android.friendica01.TwAjax;
import de.wikilab.android.friendica01.R.id;
import de.wikilab.android.friendica01.R.layout;
import de.wikilab.android.friendica01.R.string;
import de.wikilab.android.friendica01.adapter.MessageContentAdapter;
import de.wikilab.android.friendica01.adapter.MessageListAdapter;

public class MessageViewFragment extends ContentFragment {
  private static final String TAG="Friendica/MessageViewFragment";

  PullToRefreshListView rlConv, rlMsg;
  ListView lstConv, lstMsg;
  
  String refreshTarget;

  final int ITEMS_PER_PAGE = 20;
  int curConvLoadPage = 1, curMsgLoadPage = 1;
  boolean convloadFinished = false, msgloadFinished = false;

  boolean isLargeMode = false;
  boolean isMessageVisible = false;
  String messageParentUri;

  HashSet<Long> convcontainedIds = new HashSet<Long>(), msgcontainedIds = new HashSet<Long>();

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    myView = inflater.inflate(R.layout.msg_view, container, false);
    rlConv = (PullToRefreshListView) myView.findViewById(R.id.conversations);
    rlMsg = (PullToRefreshListView) myView.findViewById(R.id.messages);
    lstConv = rlConv.getRefreshableView();
    lstMsg = rlMsg.getRefreshableView();
    lstMsg.setDividerHeight(0);

    Log.d(TAG, "screenLayout="+getResources().getConfiguration().screenLayout);
    if (Max.isLarge(getResources().getConfiguration())) {
      // on a large screen device ...
      isLargeMode = true;
    }

    rlConv.setOnRefreshListener(new OnRefreshListener() {
      @Override
      public void onRefresh() {
        if (convloadFinished) {
          onNavigate(refreshTarget);
        }
      }
    });

    rlConv.setOnLastItemVisibleListener(new OnLastItemVisibleListener() {
      @Override
      public void onLastItemVisible() {
        if (convloadFinished && getConvListAdapter() != null) {
          Toast.makeText(getActivity(), "Loading more items...", Toast.LENGTH_SHORT).show();
          curConvLoadPage ++;

          convloadFinished = false;

          SendMessage("Loading Animation", Integer.valueOf(View.VISIBLE), null);

          loadConversations();
        } else {
          Log.i(TAG, "OnLastItemVisibleListener -- skip! lf="+convloadFinished+" ad:"+lstConv.getAdapter().getClass().toString());
        }
      }
    });

    lstConv.setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> self, View view, int position, long id) {
        try {

          navigateMessage(((JSONObject)self.getAdapter().getItem(position)).getString("parent-uri"));
        } catch (JSONException e) {
          e.printStackTrace();
        }
      }
    });

    ((Button) myView.findViewById(R.id.btn_upload)).setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        sendReplyMessage();
      }
    });

    return myView;
  }

  @Override
  public boolean onBackPressed() {
    if (isMessageVisible) {
      setMessageVisible(false);
      return true;
    }
    return false;
  }
  
  private void setMessageVisible(boolean v) {
    if (!isLargeMode) {
      rlConv.setVisibility(v ? View.GONE : View.VISIBLE);
      myView.findViewById(R.id.right_bar).setVisibility(v ? View.VISIBLE : View.GONE);
      isMessageVisible = v;
    }
  }
  
  private void navigateMessage(String parentUri) {
    curMsgLoadPage = 1;
    rlMsg.setRefreshing();
    messageParentUri = parentUri;

    loadMessages();
    
    setMessageVisible(true);
    if (!isLargeMode) {
      lstMsg.setAdapter(null);
    }
  }

  @Override
  public void onResume() {
    super.onResume();
    if (refreshTarget != null && convloadFinished) {
      navigate(refreshTarget);
    }
  }

  protected void sendReplyMessage() {
    if (refreshTarget == null ||!refreshTarget.startsWith("msg:conversation:")) return;

    String replyId = refreshTarget.substring(17);

    String message = ((EditText) myView.findViewById(R.id.maintb)).getText().toString();



  }

  protected void onNavigate(String target) {
    rlConv.setRefreshing();
    SendMessage("Set Header Text", getString(R.string.mm_directmessages), null);
    curConvLoadPage = 1;
    
    refreshTarget = target;
    convloadFinished = false;

    SendMessage("Loading Animation", Integer.valueOf(View.VISIBLE), null);

    loadConversations();

  }

  public void hideProgBar() {
    /*reflvw.setAddStatesFromChildren(addsStates)
    list.setVisibility(View.VISIBLE);
    progbar.setVisibility(View.GONE);*/
    if (curConvLoadPage == 1) rlConv.onRefreshComplete();

    SendMessage("Loading Animation", Integer.valueOf(View.INVISIBLE), null);

  }

  private Adapter getConvListAdapter() {
    Adapter a = lstConv.getAdapter();
    if (a instanceof WrapperListAdapter) a = ((WrapperListAdapter)a).getWrappedAdapter();
    return a;
  }

  private Adapter getMsgListAdapter() {
    Adapter a = lstMsg.getAdapter();
    if (a instanceof WrapperListAdapter) a = ((WrapperListAdapter)a).getWrappedAdapter();
    return a;
  }

  private void setConvItems(JSONArray j) throws JSONException {
    if (curConvLoadPage == 1) {
      if (j.length() == 0) {
        rlConv.setVisibility(View.GONE);
        ((TextView) myView.findViewById(R.id.lblInfo)).setVisibility(View.VISIBLE);
      }
      ArrayList<JSONObject> jsonObjectArray = new ArrayList<JSONObject>(j.length());
      convcontainedIds.clear();
      for(int i = 0; i < j.length(); i++) {
        JSONObject jj = j.getJSONObject(i);
        jsonObjectArray.add(jj);
        convcontainedIds.add(jj.getLong("id"));
      }
      lstConv.setAdapter(new MessageListAdapter(getActivity(), jsonObjectArray));
    } else {
      MessageListAdapter oldContent = (MessageListAdapter) getConvListAdapter();
      for(int i = 0; i < j.length(); i++) {
        JSONObject jj = j.getJSONObject(i);
        if (convcontainedIds.contains(jj.getLong("id"))) continue;
        oldContent.add(jj);
        convcontainedIds.add(jj.getLong("id"));
      }
      oldContent.notifyDataSetChanged();
      Toast.makeText(getActivity(), "Done loading more messages - scroll down :)", Toast.LENGTH_SHORT).show();
    }
    convloadFinished = true;
  }

  private void setMsgItems(JSONArray j) throws JSONException {
    if (curMsgLoadPage == 1) {
      if (j.length() == 0) {
        Toast.makeText(getActivity(), "No messages found.", Toast.LENGTH_LONG).show();
        return;
      }
      ArrayList<JSONObject> jsonObjectArray = new ArrayList<JSONObject>(j.length());
      msgcontainedIds.clear();
      for(int i = 0; i < j.length(); i++) {
        JSONObject jj = j.getJSONObject(i);
        jsonObjectArray.add(jj);
        msgcontainedIds.add(jj.getLong("id"));
      }
      lstMsg.setAdapter(new MessageContentAdapter(getActivity(), jsonObjectArray));
    } else {
      MessageContentAdapter oldContent = (MessageContentAdapter) getMsgListAdapter();
      for(int i = 0; i < j.length(); i++) {
        JSONObject jj = j.getJSONObject(i);
        if (msgcontainedIds.contains(jj.getLong("id"))) continue;
        oldContent.add(jj);
        msgcontainedIds.add(jj.getLong("id"));
      }
      oldContent.notifyDataSetChanged();
      Toast.makeText(getActivity(), "Done loading more messages - scroll down :)", Toast.LENGTH_SHORT).show();
    }
    msgloadFinished = true;
  }


  public void loadMessages() {
    SendMessage("Loading Animation", Integer.valueOf(View.VISIBLE), null);

    final TwAjax t = new TwAjax(getActivity(), true, true);
    String target= "conversation?uri=" + URLEncoder.encode(messageParentUri) + "&";
    String url = Max.getServer(getActivity()) + "/api/direct_messages/" + target + "getUserObjects=false&getText=plain&count=" + String.valueOf(ITEMS_PER_PAGE) + "&page=" + String.valueOf(curMsgLoadPage);
    t.getUrlContent(url, new Runnable() {
      @Override public void run() {
        try {
          JSONArray j = (JSONArray) t.getJsonResult();

          setMsgItems(j);

        } catch (Exception e) {
          lstMsg.setAdapter(new ArrayAdapter<String>(getActivity(), R.layout.pl_error_listitem, android.R.id.text1, new String[]{"Error: "+ e.getMessage(), Max.Hexdump(t.getResult().getBytes())}));
          e.printStackTrace();
        }
        if (curMsgLoadPage == 1) rlMsg.onRefreshComplete();

        SendMessage("Loading Animation", Integer.valueOf(View.INVISIBLE), null);

      }
    });

  }



  public void loadConversations() {
    final TwAjax t = new TwAjax(getActivity(), true, true);
    String url = Max.getServer(getActivity()) + "/api/direct_messages/conversations?count=" + String.valueOf(ITEMS_PER_PAGE) + "&page=" + String.valueOf(curConvLoadPage);
    t.getUrlContent(url, new Runnable() {
      @Override public void run() {
        try {
          JSONArray j = (JSONArray) t.getJsonResult();

          setConvItems(j);

        } catch (Exception e) {
          lstConv.setAdapter(new ArrayAdapter<String>(getActivity(), R.layout.pl_error_listitem, android.R.id.text1, new String[]{"Error: "+ e.getMessage(), Max.Hexdump(t.getResult().getBytes())}));
          e.printStackTrace();
        }
        hideProgBar();
      }
    });

  }



}
Java Source Code List
