com.rw.barcharttest.MainActivity.java Source code

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Here is the source code for com.rw.barcharttest.MainActivity.java

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/*
 * Copyright (C) 2015 Republic Wireless
 *
 * 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.rw.barcharttest;

import android.app.ActionBar;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.text.format.DateUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.rw.barcharttest.usagechart.ChartData;
import com.rw.barcharttest.usagechart.ChartData.Entry;
import com.rw.barcharttest.usagechart.ChartDataUsageView;
import com.rw.barcharttest.usagechart.ChartDataUsageView.DataUsageChartListener;
import com.rw.barcharttest.utils.StringUtils;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.Random;

public class MainActivity extends FragmentActivity {

    private static SimpleDateFormat sDateFormatter = new SimpleDateFormat("MMM dd");

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final ActionBar actionBar = getActionBar();
        if (actionBar != null) {
            actionBar.setDisplayShowTitleEnabled(true);
            actionBar.setTitle(R.string.app_name);
        }
    }

    public static class BarChartFragment extends Fragment implements DataUsageChartListener {

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            final View v = inflater.inflate(R.layout.fragment_data_usage, container, false);
            v.setBackgroundColor(getResources().getColor(R.color.background));

            // Set to Midnight a month ago.
            Calendar cal = Calendar.getInstance();
            cal.set(Calendar.HOUR_OF_DAY, 0);
            cal.set(Calendar.MINUTE, 0);
            cal.set(Calendar.SECOND, 0);
            cal.set(Calendar.MILLISECOND, 0);
            cal.add(Calendar.MONTH, -1);

            // Generate some quick dummy data and bind it to our chart.
            Random random = new Random();
            List<Entry> list = new ArrayList<Entry>(30);
            for (int i = 0; i < 30; i++) {
                Entry entry = new Entry();
                entry.date = cal.getTimeInMillis();
                cal.add(Calendar.DAY_OF_MONTH, 1);
                // Random number of megabytes used for the day.
                entry.totalBytes = (random.nextInt(1000) + 1) * 1024 * 2;
                list.add(entry);
            }

            long start = list.get(0).date;
            long end = list.get(list.size() - 1).date;

            // Load the chart data object.
            ChartData data = new ChartData();
            data.addEntries(list);
            data.setStart(start);
            data.setEnd(end);

            // Bind it to the chart.
            ChartDataUsageView chart = (ChartDataUsageView) v.findViewById(R.id.chart);
            chart.bindChartData(data);
            chart.setVisibleRange(start - (DateUtils.DAY_IN_MILLIS / 2), end + DateUtils.DAY_IN_MILLIS);
            chart.setListener(this);
            return v;
        }

        @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);

            // Initialize the summary message.
            onInspectRangeChanged();
        }

        @Override
        public void onInspectRangeChanged() {
            View v = getView();
            if (v != null) {
                ChartDataUsageView chart = (ChartDataUsageView) v.findViewById(R.id.chart);
                TextView summary = (TextView) v.findViewById(R.id.summary_text_view);
                if (chart != null && summary != null) {
                    long start = chart.getInspectStart();
                    long end = chart.getInspectEnd();

                    String startStr = sDateFormatter.format(start);
                    String endStr = sDateFormatter.format(end);

                    long totalUsage = 0;
                    List<Entry> selectedEntries = chart.getChartData().getEntries(start, end);
                    for (Entry entry : selectedEntries) {
                        totalUsage += entry.totalBytes;
                    }

                    summary.setText(getString(R.string.data_usage_between, startStr, endStr,
                            StringUtils.humanReadableByteCount(totalUsage, true)));
                }
            }
        }

    }

}