Android Open Source - matrix-android-sdk Room Summary Adapter

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License

The source code is released under:

Apache License

Java Source Code

package org.matrix.matrixandroidsdk.adapters;
/*  ww w.j  a  va2  s  . c o  m*/
import android.content.Context;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import org.matrix.androidsdk.data.RoomState;
import org.matrix.androidsdk.data.RoomSummary;
import org.matrix.androidsdk.rest.model.Event;
import org.matrix.matrixandroidsdk.R;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Comparator;
import java.util.Date;
import java.util.Locale;

public class RoomSummaryAdapter extends ArrayAdapter<RoomSummary> {

    private Context mContext;
    private LayoutInflater mLayoutInflater;
    private int mLayoutResourceId;

    private int mOddColourResId;
    private int mEvenColourResId;

    private DateFormat mDateFormat;

    /**
     * Construct an adapter which will display a list of rooms.
     * @param context Activity context
     * @param layoutResourceId The resource ID of the layout for each item. Must have TextViews with
     *                         the IDs: roomsAdapter_roomName, roomsAdapter_roomTopic
     */
    public RoomSummaryAdapter(Context context, int layoutResourceId) {
        super(context, layoutResourceId);
        mContext = context;
        mLayoutResourceId = layoutResourceId;
        mLayoutInflater = LayoutInflater.from(mContext);
        mDateFormat = new SimpleDateFormat("MMM d HH:mm", Locale.getDefault());
        setNotifyOnChange(true);
    }

    public void sortSummaries() {
        this.sort(new Comparator<RoomSummary>() {
            @Override
            public int compare(RoomSummary lhs, RoomSummary rhs) {
                if (lhs == null || lhs.getLatestEvent() == null) {
                    return 1;
                }
                else if (rhs == null || rhs.getLatestEvent() == null) {
                    return -1;
                }

                if (lhs.getLatestEvent().origin_server_ts > rhs.getLatestEvent().origin_server_ts) {
                    return -1;
                }
                else if (lhs.getLatestEvent().origin_server_ts < rhs.getLatestEvent().origin_server_ts) {
                    return 1;
                }
                return 0;
            }
        });
    }

    public RoomSummary getSummaryByRoomId(String roomId) {
        for (int i=0; i<getCount(); i++) {
            RoomSummary summary = getItem(i);
            if (roomId.equals(summary.getRoomId())) {
                return summary;
            }
        }
        return null;
    }

    /**
     * Set the latest event for a room summary.
     * @param event The latest event
     */
    public void setLatestEvent(Event event, RoomState roomState) {
        for (int i=0; i<getCount(); i++) {
            RoomSummary summary = getItem(i);
            if (event.roomId.equals(summary.getRoomId())) {
                summary.setLatestEvent(event);
                summary.setLatestRoomState(roomState);
                sortSummaries();
                notifyDataSetChanged();
                break;
            }
        }
    }

    public void setAlternatingColours(int oddResId, int evenResId) {
        mOddColourResId = oddResId;
        mEvenColourResId = evenResId;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = mLayoutInflater.inflate(mLayoutResourceId, parent, false);
        }

        RoomSummary summary = getItem(position);

        String numMembers = null;
        CharSequence message = summary.getRoomTopic();
        String timestamp = null;

        TextView textView = (TextView) convertView.findViewById(R.id.roomSummaryAdapter_roomName);
        textView.setText(summary.getRoomName());

        if (summary.getNumMembers() > 0) {
            numMembers = mContext.getResources().getQuantityString(
                    R.plurals.num_members, summary.getNumMembers(),
                    summary.getNumMembers()
            );
        }

        if (summary.getLatestEvent() != null) {
            AdapterUtils.EventDisplay display = new AdapterUtils.EventDisplay(mContext, summary.getLatestEvent(), summary.getLatestRoomState());
            display.setPrependMessagesWithAuthor(true);
            message = display.getTextualDisplay();

            timestamp = mDateFormat.format(new Date(summary.getLatestEvent().origin_server_ts));
        }

        // check if this is an invite
        if (summary.isInvited()) {
            message = summary.getInviterUserId() +"'s invitation";
        }


        textView = (TextView) convertView.findViewById(R.id.roomSummaryAdapter_message);
        textView.setText(message);
        textView = (TextView) convertView.findViewById(R.id.roomSummaryAdapter_ts);
        textView.setText(timestamp);
        textView = (TextView) convertView.findViewById(R.id.roomSummaryAdapter_numUsers);
        textView.setText(numMembers);

        if (mOddColourResId != 0 && mEvenColourResId != 0) {
            convertView.setBackgroundColor(position%2 == 0 ? mEvenColourResId : mOddColourResId);
        }

        return convertView;

    }
}

Java Source Code List

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