Android Open Source - Android-Battery-Widget History View Manager

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License

The source code is released under:

Apache License

Java Source Code

/*
 *  Copyright 2012 Erkan Molla//  ww  w .  j  a va2  s.  co  m
 *
 *  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.em.batterywidget;

import android.app.Activity;
import android.database.Cursor;
import android.graphics.Color;
import android.graphics.Paint.Align;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.em.batterywidget.storage.SQLiteDataBase;
import org.achartengine.ChartFactory;
import org.achartengine.GraphicalView;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.model.XYSeries;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;

public class HistoryViewManager extends Activity {

    private SQLiteDataBase           db;
    private XYMultipleSeriesDataset  dataSet;
    private XYMultipleSeriesRenderer renderer;
    private GraphicalView            chartView;
    private LinearLayout             chartContainer;
    private XYSeries                 xYSeries;
    private TextView                 titleTextView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.history_view);

        db = new SQLiteDataBase(getApplicationContext());
        db.openRead();

        titleTextView = (TextView) findViewById(R.id.historyTitle);
        chartContainer = (LinearLayout) findViewById(R.id.chart);
    }

    @Override
    public void onResume() {
        super.onResume();
        if (db.availableEntries()) {
            titleTextView.setText(this.getString(R.string.availableData));
            chartInit();
            new Thread(new Runnable() {
                public void run() {
                    try {
                        chartDraw();
                    } catch (Exception e) {
                    }
                }
            }).start();
        }
        else {
            titleTextView.setText(this.getString(R.string.notAvailableDataYet));
            db.close();
        }
    }

    @Override
    public void onPause() {
        super.onPause();
        if (chartContainer != null)
            chartContainer.removeAllViews();
    }

    public void chartInit() {
        if (chartView == null) {
            renderer = new XYMultipleSeriesRenderer();
            renderer.setMargins(new int[] {
                    30, 35, 30, 10
            }); // {top, left, bottom, right};
            renderer.setXTitle(Constants.XAxisTitle);
            renderer.setYTitle(Constants.YAxisTitle);
            renderer.setLabelsColor(Color.WHITE);
            renderer.setLabelsTextSize(11);
            renderer.setAxisTitleTextSize(15);
            renderer.setLegendTextSize(15);
            renderer.setYLabelsAlign(Align.RIGHT);
            renderer.setYLabels(10);
            renderer.setYAxisMin(0);
            renderer.setYAxisMax(100);
            renderer.setPanEnabled(true, false);
            renderer.setZoomEnabled(true, false);
            renderer.setShowGrid(true);
            renderer.setZoomButtonsVisible(true);

            dataSet = new XYMultipleSeriesDataset();
            xYSeries = new XYSeries("");
            dataSet.addSeries(xYSeries);

            XYSeriesRenderer mMainRenderer = new XYSeriesRenderer();
            mMainRenderer.setColor(Color.CYAN);
            renderer.addSeriesRenderer(mMainRenderer);
            chartView = ChartFactory.getTimeChartView(this, dataSet, renderer, Constants.DateFormat);

            chartContainer.addView(chartView);
        }
    }

    private void chartDraw() {
        int oldLevel = -1;
        int level = 0;
        long time = System.currentTimeMillis();
        boolean skip = false;

        Cursor cursor = db.getEntries();

        if (cursor.moveToFirst())
            do {
                time = cursor.getLong(SQLiteDataBase._TIME);
                level = cursor.getInt(SQLiteDataBase._LEVEL);
                skip = level == oldLevel;
                if (!skip) {
                    xYSeries.add(time, level);
                    oldLevel = level;
                }
            } while (cursor.moveToNext());

        cursor.close();
        db.close();

        if (skip)
            xYSeries.add(time, oldLevel);

        chartView.repaint();
    }

}

Java Source Code List

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