Android Open Source - WsprNetViewer Wspr Adapter

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The source code is released under:
Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUC...
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Java Source Code

/*
 * Copyright (C) 2014 Joseph D. Glandorf
 */*from  w ww .  jav  a2s .com*/
 * 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.glandorf1.joe.wsprnetviewer.app;

import android.content.Context;
import android.database.Cursor;
import android.support.v4.widget.CursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

/**
 * {@link com.glandorf1.joe.wsprnetviewer.app.WsprAdapter} exposes a list of WSPR data
 * from a {@link android.database.Cursor} to a {@link android.widget.ListView}.
 */
public class WsprAdapter extends CursorAdapter {

    // TODO: turn these into 'enums'
    private static final int VIEW_TYPE_COUNT = 2;
    private static final int VIEW_TYPE_RECENT = 0;
    private static final int VIEW_TYPE_OLDER = 1;
    // Flag to determine if we want to use a separate view for "recent reports".
    private boolean mUseDualPane = false;
    public int mainDisplayFormat = -1;

    /**
     * Cache of the children views for a wspr list item.
     */
    public static class ViewHolder {
        public final ImageView iconView;
        public final TextView timestampView;
        public final TextView txgridsquareView;
        public final TextView rxgridsquareView;
        public final TextView txgridsquarelabelView;
        public final TextView rxgridsquarelabelView;
        public final TextView txcallsignView;
        public final TextView rxcallsignView;
        public final TextView txcallsignlabelView;
        public final TextView rxcallsignlabelView;
        public final TextView txfreqmhzView;
        public final TextView rxsnrView;
        public final TextView distanceView;
        public final TextView distanceViewUnits;

        public ViewHolder(View view) {
            iconView = (ImageView) view.findViewById(R.id.list_item_icon);
            timestampView = (TextView) view.findViewById(R.id.list_item_timestamp_textview);
            rxgridsquareView = (TextView) view.findViewById(R.id.list_item_rxgridsquare_textview);
            txgridsquareView = (TextView) view.findViewById(R.id.list_item_txgridsquare_textview);
            rxgridsquarelabelView = (TextView) view.findViewById(R.id.list_item_rxgridsquare_label_textview);
            txgridsquarelabelView = (TextView) view.findViewById(R.id.list_item_txgridsquare_label_textview);
            rxcallsignView = (TextView) view.findViewById(R.id.list_item_rxcallsign_textview);
            txcallsignView = (TextView) view.findViewById(R.id.list_item_txcallsign_textview);
            rxcallsignlabelView = (TextView) view.findViewById(R.id.list_item_rxcallsign_label_textview);
            txcallsignlabelView = (TextView) view.findViewById(R.id.list_item_txcallsign_label_textview);
            txfreqmhzView = (TextView) view.findViewById(R.id.list_item_txfreqmhz_textview);
            rxsnrView = (TextView) view.findViewById(R.id.list_item_rxsnr_textview);
            distanceView = (TextView) view.findViewById(R.id.list_item_distance_textview);
            distanceViewUnits = (TextView) view.findViewById(R.id.list_item_distance_label_textview);
        }
    }

    public WsprAdapter(Context context, Cursor c, int flags) {
        super(context, c, flags);
    }

    public void setUseDualPane(boolean useDualPane) {
        mUseDualPane = useDualPane;
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        int layoutId = R.layout.list_item_wspr;
        View view = LayoutInflater.from(context).inflate(layoutId, parent, false);
        ViewHolder viewHolder = new ViewHolder(view);
        view.setTag(viewHolder);
        return view;
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {

        ViewHolder viewHolder = (ViewHolder) view.getTag();
        // Read timestamp from cursor
        String timestampString = cursor.getString(WsprFragment.COL_WSPR_TIMESTAMP);

        // Read wspr condition ID from cursor
        //int viewType = getItemViewType(cursor.getPosition());
        int viewType = mainDisplayFormat;
        // Get wspr icon
        viewHolder.iconView.setImageResource(Utility.getIconResourceForWsprCondition(cursor.getDouble(WsprFragment.COL_WSPR_RX_SNR)));

        // Find TextView and set formatted timestamp on it
        viewHolder.timestampView.setText(Utility.getFormattedTimestamp(timestampString, Utility.TIMESTAMP_FORMAT_HOURS_MINUTES));

        // Read wspr data from cursor, then set text boxes
        String txgridsquare = cursor.getString(WsprFragment.COL_WSPR_TX_GRIDSQUARE);
        viewHolder.txgridsquareView.setText(txgridsquare);
        String rxgridsquare = cursor.getString(WsprFragment.COL_WSPR_RX_GRIDSQUARE);
        viewHolder.rxgridsquareView.setText(rxgridsquare);

        String txcallsign = cursor.getString(WsprFragment.COL_WSPR_TX_CALLSIGN);
        viewHolder.txcallsignView.setText(txcallsign);
        String rxcallsign = cursor.getString(WsprFragment.COL_WSPR_RX_CALLSIGN);
        viewHolder.rxcallsignView.setText(rxcallsign);

        // Read user preference for metric or English units
        boolean isMetric = Utility.isMetric(context);

        // Read frequency from cursor
        double frequency = cursor.getDouble(WsprFragment.COL_WSPR_TX_FREQ_MHZ);
        viewHolder.txfreqmhzView.setText(Utility.formatFrequency(context, frequency, true));

        // Read RX SNR from cursor
        double rxsnr = cursor.getDouble(WsprFragment.COL_WSPR_RX_SNR);
        viewHolder.rxsnrView.setText(Utility.formatSnr(context, rxsnr));
        // For accessibility, add a content description to the icon field
        // TODO: improve accessibility message for the icon
        viewHolder.iconView.setContentDescription(rxsnr + " dB");

        // Read distance from cursor
        double km = cursor.getDouble(WsprFragment.COL_WSPR_DISTANCE);
        viewHolder.distanceView.setText(Utility.formatDistance(context, km, isMetric));
        viewHolder.distanceViewUnits.setText(isMetric ?
                context.getString(R.string._units_metric_distance)
                : context.getString(R.string._units_english_distance) );

        switch (viewType) {
            case Utility.MAIN_DISPLAY_CALLSIGN: // fit everything into 2 lines of display
                viewHolder.txgridsquareView.setVisibility(View.GONE);
                viewHolder.rxgridsquareView.setVisibility(View.GONE);
                viewHolder.txgridsquarelabelView.setVisibility(View.GONE);
                viewHolder.rxgridsquarelabelView.setVisibility(View.GONE);
                viewHolder.txcallsignView.setVisibility(View.VISIBLE);
                viewHolder.rxcallsignView.setVisibility(View.VISIBLE);
                viewHolder.txcallsignlabelView.setVisibility(View.VISIBLE);
                viewHolder.rxcallsignlabelView.setVisibility(View.VISIBLE);
                viewHolder.distanceView.setVisibility(View.GONE);
                viewHolder.distanceViewUnits.setVisibility(View.GONE);
                break;
            case Utility.MAIN_DISPLAY_GRIDCALL: // fit everything into 4 lines of display
                viewHolder.txgridsquareView.setVisibility(View.VISIBLE);
                viewHolder.rxgridsquareView.setVisibility(View.VISIBLE);
                viewHolder.txgridsquarelabelView.setVisibility(View.VISIBLE);
                viewHolder.rxgridsquarelabelView.setVisibility(View.VISIBLE);
                viewHolder.txcallsignView.setVisibility(View.VISIBLE);
                viewHolder.rxcallsignView.setVisibility(View.VISIBLE);
                viewHolder.txcallsignlabelView.setVisibility(View.VISIBLE);
                viewHolder.rxcallsignlabelView.setVisibility(View.VISIBLE);
                viewHolder.distanceView.setVisibility(View.VISIBLE);
                viewHolder.distanceViewUnits.setVisibility(View.VISIBLE);
                break;
            case Utility.MAIN_DISPLAY_GRIDSQUARE: // fit everything into 2 lines of display
            default:
                viewHolder.txgridsquareView.setVisibility(View.VISIBLE);
                viewHolder.rxgridsquareView.setVisibility(View.VISIBLE);
                viewHolder.txgridsquarelabelView.setVisibility(View.VISIBLE);
                viewHolder.rxgridsquarelabelView.setVisibility(View.VISIBLE);
                viewHolder.txcallsignView.setVisibility(View.GONE);
                viewHolder.rxcallsignView.setVisibility(View.GONE);
                viewHolder.txcallsignlabelView.setVisibility(View.GONE);
                viewHolder.rxcallsignlabelView.setVisibility(View.GONE);
                viewHolder.distanceView.setVisibility(View.GONE);
                viewHolder.distanceViewUnits.setVisibility(View.GONE);
        }

    }

    //@Override
    public int getItemViewType(int position) {
        // TODO: Determine if we need an alternate listview for newer vs. older items; get isRecent() working if we do.
        //       Figure out if this can be implemented with the standard override function.
        //return (Utility.isRecent(mContext, timestamp, Utility.cutoffHours(mContext)) || mUseDualPane) ? VIEW_TYPE_RECENT : VIEW_TYPE_OLDER;
        return VIEW_TYPE_OLDER;
    }

    @Override
    public int getViewTypeCount() {
        return VIEW_TYPE_COUNT;
    }
}
Java Source Code List
