Java tutorial
/* * Copyright (C) 2014 The Android Open Source Project * * 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.example.asadkhan.sunshine; import android.content.Context; import android.database.Cursor; import android.support.v4.widget.CursorAdapter; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; /** * {@link ForecastAdapter} exposes a list of weather forecasts * from a {@link Cursor} to a {@link android.widget.ListView}. */ public class ForecastAdapter extends CursorAdapter { private final static String LOG_TAG = ForecastAdapter.class.getSimpleName(); private final int VIEW_TYPE_TODAY = 0; private final int VIEW_TYPE_FUTURE_DAY = 1; private final int VIEW_TYPE_COUNT = 2; private boolean mUseTodayLayout = true; public ForecastAdapter(Context context) { super(context, null, 0); } public ForecastAdapter(Context context, Cursor c, int flags) { super(context, c, flags); } @Override public int getViewTypeCount() { return VIEW_TYPE_COUNT; } public void setUseTodayLayout(boolean UseTodayLayout) { mUseTodayLayout = !UseTodayLayout; } @Override public int getItemViewType(int position) { return (position == 0 && mUseTodayLayout) ? VIEW_TYPE_TODAY : VIEW_TYPE_FUTURE_DAY; } /* Remember that these views are reused as needed. */ @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { int viewType = getItemViewType(cursor.getPosition()); int layoutId = -1; switch (viewType) { case VIEW_TYPE_TODAY: { layoutId = R.layout.list_item_forecast_today; break; } case VIEW_TYPE_FUTURE_DAY: { layoutId = R.layout.list_item_forecast; break; } } View view = LayoutInflater.from(context).inflate(layoutId, parent, false); ViewHolder viewHolder = new ViewHolder(view); view.setTag(viewHolder); return view; } /* This is where we fill-in the views with the contents of the cursor. */ @Override public void bindView(View view, Context context, Cursor cursor) { ViewHolder viewHolder = (ViewHolder) view.getTag(); int viewType = getItemViewType(cursor.getPosition()); switch (viewType) { case VIEW_TYPE_TODAY: { viewHolder.iconView.setImageResource(Utility.getArtResourceForWeatherCondition( cursor.getInt(MainForecastFragment.COL_WEATHER_CONDITION_ID))); break; } case VIEW_TYPE_FUTURE_DAY: { viewHolder.iconView.setImageResource(Utility.getIconResourceForWeatherCondition( cursor.getInt(MainForecastFragment.COL_WEATHER_CONDITION_ID))); break; } } Long dateInMillis = cursor.getLong(MainForecastFragment.COL_WEATHER_DATE); viewHolder.dateView.setText(Utility.getFriendlyDayString(context, dateInMillis)); String description = cursor.getString(MainForecastFragment.COL_WEATHER_DESC); viewHolder.descriptionView.setText(description); // Read user preference for metric or imperial temperature units boolean isMetric = Utility.isMetric(context); double high = cursor.getDouble(MainForecastFragment.COL_WEATHER_MAX_TEMP); viewHolder.highTempView.setText(Utility.formatTemperature(context, high, isMetric)); double low = cursor.getDouble(MainForecastFragment.COL_WEATHER_MIN_TEMP); viewHolder.lowTempView.setText(Utility.formatTemperature(context, low, isMetric)); // Log.e(LOG_TAG, "High val : " + high); // Log.e(LOG_TAG, "Low val : " + low); } /** * Cache of the children views for a forecast list item. */ private static class ViewHolder { /* Constituent views */ private final ImageView iconView; private final TextView dateView; private final TextView descriptionView; private final TextView highTempView; private final TextView lowTempView; /* Public Constructor */ ViewHolder(View view) { iconView = (ImageView) view.findViewById(R.id.list_item_icon); dateView = (TextView) view.findViewById(R.id.list_item_date_textview); descriptionView = (TextView) view.findViewById(R.id.list_item_forecast_textview); highTempView = (TextView) view.findViewById(R.id.list_item_high_textview); lowTempView = (TextView) view.findViewById(R.id.list_item_low_textview); } } /** * Prepare the weather high/lows for presentation. */ private String formatHighLows(double high, double low) { boolean isMetric = Utility.isMetric(mContext); String highLowStr = Utility.formatTemperature(high, isMetric) + "/" + Utility.formatTemperature(low, isMetric); Log.e("ForecastAdapter", "Inside FHL : " + highLowStr); return highLowStr; } /* This is ported from FetchWeatherTask --- but now we go straight from the cursor to the string. */ private String convertCursorRowToUXFormat(Cursor cursor) { String highAndLow = formatHighLows(cursor.getDouble(MainForecastFragment.COL_WEATHER_MAX_TEMP), cursor.getDouble(MainForecastFragment.COL_WEATHER_MIN_TEMP)); return Utility.formatDate(cursor.getLong(MainForecastFragment.COL_WEATHER_DATE)) + " - " + cursor.getString(MainForecastFragment.COL_WEATHER_DESC) + " - " + highAndLow; } }