aChartEngineを使用したグラフ

aCharteEngin GraphView.java

// https://code.google.com/p/achartengine/ を使用したグラフ
// http://niche-na-blog.seesaa.net/article/393534481.html 参考
// これかなりいい！！！ 
 
import org.achartengine.ChartFactory;
import org.achartengine.GraphicalView;
import org.achartengine.chart.PointStyle;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.model.XYSeries;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;
 
import android.app.Activity;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Window;
import android.widget.FrameLayout;
import com.example.graph.R;
 
public class MainActivity extends Activity {
 
	private ExampleOpenHelper mExampleOpenHelper;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);
		
	     //レイアウトに表示
		FrameLayout mainFrame = (FrameLayout)findViewById(R.id.main);
		
		mExampleOpenHelper = new ExampleOpenHelper(MainActivity.this);
		SQLiteDatabase db = mExampleOpenHelper.getReadableDatabase(); //データベース取得
		Cursor cursor = db.rawQuery("SELECT * from example", new String[] {});
		
		GraphicalView lineChartGraph = LineChart.execute(this,cursor);
		mainFrame.addView(lineChartGraph);
		
		cursor.close();
		db.close();
		mExampleOpenHelper.close();
	}
 
 
	private class ExampleOpenHelper extends SQLiteOpenHelper {
		final static private int DB_VERSION = 1;
 
		public ExampleOpenHelper(Context context) {
			super(context, "sample.db", null, DB_VERSION);
		}
 
		// 初回起動時のみ処理される
		@Override
		public void onCreate(SQLiteDatabase db) {
			/**
			 *  name: exampleテーブル
			 *  id:integer | memo:real
			 */
			db.execSQL("CREATE TABLE example(id INTEGER PRIMARY KEY AUTOINCREMENT, memo REAL NOT NULL);");
 
			// 初期データの投入
			for(int i=0;i<=99;i++){
				db.execSQL("INSERT INTO example(memo) values('"+ Math.random() +"')");
			}
		}
 
		@Override
		public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		}
	}
 
	public static class LineChart{
		static XYSeries series;
		
		public static GraphicalView execute(Context context,Cursor cursor) {
			series = new XYSeries("sample");
			 
			int number = 0;
			double x,y;
			boolean next = cursor.moveToFirst();
			while (next) {
				x = number;
				y = cursor.getDouble(1);
				series.add(x, y);
				number++;
				next = cursor.moveToNext();
			}

			//インテントではなくGraphicalViewを戻り値に
			GraphicalView gv = ChartFactory.getLineChartView(context, getDataset(), getRenderer());
			return gv;
		}
		public static XYMultipleSeriesDataset getDataset() {
			XYMultipleSeriesDataset dataSet = new XYMultipleSeriesDataset();
			dataSet.addSeries(series);
			return dataSet;
		}
		public static XYMultipleSeriesRenderer getRenderer(){
			XYSeriesRenderer renderer1 = new XYSeriesRenderer(); //個別のグラフ
			renderer1.setColor(Color.rgb(51,181,229)); //グラフの色
			renderer1.setLineWidth(2); //グラフの幅
			renderer1.setPointStyle(PointStyle.SQUARE);	//ポイント設定
			renderer1.setPointStrokeWidth(8);
			renderer1.setFillPoints(true);
			
			XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer(); //グラフ全体
			mRenderer.setApplyBackgroundColor(true); //背景色変更
			mRenderer.setBackgroundColor(Color.BLACK);
			mRenderer.setMarginsColor(Color.argb(0x00, 0x01, 0x01, 0x01)); //余白色変更
			mRenderer.setPanEnabled(true);	//グラフを固定
			mRenderer.setZoomEnabled(false); //ズームを不可に
			mRenderer.setShowLegend(false); //凡例非表示
			mRenderer.setAxesColor(Color.GRAY); //軸の色
			mRenderer.setShowGrid(true); //グリッド表示
			mRenderer.setGridColor(Color.parseColor("lightgray")); //グリッドの色
			mRenderer.setXAxisMin(0);
			//mRenderer.setXAxisMax(23); //表示範囲
			//mRenderer.setLabelsTextSize(24); //ラベル文字サイズ
			// mRenderer.setXLabels(0); //X軸ラベル非表示
			//Y軸ラベル設定
			mRenderer.setYLabels(5);//Y軸グリッドの密度？
			mRenderer.setYLabelsColor(0, Color.GRAY);
			mRenderer.setYLabelsPadding(20);
			mRenderer.setYLabelsVerticalPadding(-8);
			mRenderer.addSeriesRenderer(renderer1);
			return mRenderer;
		}
	}
}