安卓图表引擎AChartEngine(四) - 源码示例 嵌入Acitivity中的折线图

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前面几篇博客中都是调用ChartFactory.get***Intent()方法，本节讲的内容调用ChartFactory.get***View()方法，这个方法调用的结果可以嵌入到任何一个Activity中，作为Activity的一部分。

XYChartBuilder.java(源码分析见注释)

package org.achartengine.chartdemo.demo.chart; import java.io.File; import java.io.FileOutputStream; import org.achartengine.ChartFactory; import org.achartengine.GraphicalView; import org.achartengine.chart.PointStyle; import org.achartengine.chartdemo.demo.R; import org.achartengine.model.SeriesSelection; import org.achartengine.model.XYMultipleSeriesDataset; import org.achartengine.model.XYSeries; import org.achartengine.renderer.XYMultipleSeriesRenderer; import org.achartengine.renderer.XYSeriesRenderer; import org.achartengine.tools.PanListener; import org.achartengine.tools.ZoomEvent; import org.achartengine.tools.ZoomListener; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; import android.graphics.Color; import android.os.Bundle; import android.os.Environment; import android.view.View; import android.view.ViewGroup.LayoutParams; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.Toast; public class XYChartBuilder extends Activity { public static final String TYPE = "type"; private XYMultipleSeriesDataset mDataset = new XYMultipleSeriesDataset(); private XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer(); private XYSeries mCurrentSeries; private XYSeriesRenderer mCurrentRenderer; private String mDateFormat; private Button mNewSeries; private Button mAdd; private EditText mX; private EditText mY; private GraphicalView mChartView; private int index = 0; @Override protected void onRestoreInstanceState(Bundle savedState) { super.onRestoreInstanceState(savedState); mDataset = (XYMultipleSeriesDataset) savedState.getSerializable("dataset"); mRenderer = (XYMultipleSeriesRenderer) savedState.getSerializable("renderer"); mCurrentSeries = (XYSeries) savedState.getSerializable("current_series"); mCurrentRenderer = (XYSeriesRenderer) savedState.getSerializable("current_renderer"); mDateFormat = savedState.getString("date_format"); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putSerializable("dataset", mDataset); outState.putSerializable("renderer", mRenderer); outState.putSerializable("current_series", mCurrentSeries); outState.putSerializable("current_renderer", mCurrentRenderer); outState.putString("date_format", mDateFormat); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.xy_chart); mX = (EditText) findViewById(R.id.xValue); mY = (EditText) findViewById(R.id.yValue); mRenderer.setApplyBackgroundColor(true);//设置是否显示背景色 mRenderer.setBackgroundColor(Color.argb(100, 50, 50, 50));//设置背景色 mRenderer.setAxisTitleTextSize(16); //设置轴标题文字的大小 mRenderer.setChartTitleTextSize(20);//?设置整个图表标题文字大小 mRenderer.setLabelsTextSize(15);//设置刻度显示文字的大小(XY轴都会被设置) mRenderer.setLegendTextSize(15);//图例文字大小 mRenderer.setMargins(new int[] { 30, 70, 0, 10 });//设置图表的外边框(上/左/下/右) mRenderer.setZoomButtonsVisible(true);//是否显示放大缩小按钮 mRenderer.setPointSize(10);//设置点的大小(图上显示的点的大小和图例中点的大小都会被设置) mAdd = (Button) findViewById(R.id.add); mNewSeries = (Button) findViewById(R.id.new_series); mNewSeries.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { String seriesTitle = "Series " + (mDataset.getSeriesCount() + 1);//图例 XYSeries series = new XYSeries(seriesTitle);//定义XYSeries mDataset.addSeries(series);//在XYMultipleSeriesDataset中添加XYSeries mCurrentSeries = series;//设置当前需要操作的XYSeries XYSeriesRenderer renderer = new XYSeriesRenderer();//定义XYSeriesRenderer mRenderer.addSeriesRenderer(renderer);//将单个XYSeriesRenderer增加到XYMultipleSeriesRenderer renderer.setPointStyle(PointStyle.CIRCLE);//点的类型是圆形 renderer.setFillPoints(true);//设置点是否实心 mCurrentRenderer = renderer; setSeriesEnabled(true); } }); //增加一个点后重画图 mAdd.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { double x = 0; double y = 0; try { x = Double.parseDouble(mX.getText().toString()); } catch (NumberFormatException e) { // TODO mX.requestFocus(); return; } try { y = Double.parseDouble(mY.getText().toString()); } catch (NumberFormatException e) { // TODO mY.requestFocus(); return; } mCurrentSeries.add(x, y); mX.setText(""); mY.setText(""); mX.requestFocus(); if (mChartView != null) { mChartView.repaint();//重画图表 } //生成图片保存,注释掉下面的代码不影响图表的生成. //-->start Bitmap bitmap = mChartView.toBitmap(); try { File file = new File(Environment.getExternalStorageDirectory(), "test" + index++ + ".png"); FileOutputStream output = new FileOutputStream(file); bitmap.compress(CompressFormat.PNG, 100, output); } catch (Exception e) { e.printStackTrace(); } //-->end } }); } @Override protected void onResume() { super.onResume(); if (mChartView == null) { LinearLayout layout = (LinearLayout) findViewById(R.id.chart); mChartView = ChartFactory.getLineChartView(this, mDataset, mRenderer); mRenderer.setClickEnabled(true);//设置图表是否允许点击 mRenderer.setSelectableBuffer(100);//设置点的缓冲半径值(在某点附件点击时,多大范围内都算点击这个点) mChartView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //这段代码处理点击一个点后,获得所点击的点在哪个序列中以及点的坐标. //-->start SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint(); double[] xy = mChartView.toRealPoint(0); if (seriesSelection == null) { Toast.makeText(XYChartBuilder.this, "No chart element was clicked", Toast.LENGTH_SHORT) .show(); } else { Toast.makeText( XYChartBuilder.this, "Chart element in series index " + seriesSelection.getSeriesIndex() + " data point index " + seriesSelection.getPointIndex() + " was clicked" + " closest point value X=" + seriesSelection.getXValue() + ", Y=" + seriesSelection.getValue() + " clicked point value X=" + (float) xy[0] + ", Y=" + (float) xy[1], Toast.LENGTH_SHORT).show(); } //-->end } }); mChartView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint(); if (seriesSelection == null) { Toast.makeText(XYChartBuilder.this, "No chart element was long pressed", Toast.LENGTH_SHORT); return false; // no chart element was long pressed, so let something // else handle the event } else { Toast.makeText(XYChartBuilder.this, "Chart element in series index " + seriesSelection.getSeriesIndex() + " data point index " + seriesSelection.getPointIndex() + " was long pressed", Toast.LENGTH_SHORT); return true; // the element was long pressed - the event has been // handled } } }); //这段代码处理放大缩小 //-->start mChartView.addZoomListener(new ZoomListener() { public void zoomApplied(ZoomEvent e) { String type = "out"; if (e.isZoomIn()) { type = "in"; } System.out.println("Zoom " + type + " rate " + e.getZoomRate()); } public void zoomReset() { System.out.println("Reset"); } }, true, true); //-->end //设置拖动图表时后台打印出图表坐标的最大最小值. mChartView.addPanListener(new PanListener() { public void panApplied() { System.out.println("New X range=[" + mRenderer.getXAxisMin() + ", " + mRenderer.getXAxisMax() + "], Y range=[" + mRenderer.getYAxisMax() + ", " + mRenderer.getYAxisMax() + "]"); } }); layout.addView(mChartView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); boolean enabled = mDataset.getSeriesCount() > 0; setSeriesEnabled(enabled); } else { mChartView.repaint(); } } private void setSeriesEnabled(boolean enabled) { mX.setEnabled(enabled); mY.setEnabled(enabled); mAdd.setEnabled(enabled); } }

安卓图表引擎AChartEngine(一) -简介

http://blog.csdn.net/lk_blog/article/details/7645509

安卓图表引擎AChartEngine(二) -示例源码概述和分析

http://blog.csdn.net/lk_blog/article/details/7642751

安卓图表引擎AChartEngine(三) -示例源码折线图、饼图和柱状图

http://blog.csdn.net/lk_blog/article/details/7645668

安卓图表引擎AChartEngine(四) -源码示例嵌入Acitivity中的折线图

http://blog.csdn.net/lk_blog/article/details/7645665

安卓图表引擎AChartEngine(五) -Render和Dataset参数介绍

http://blog.csdn.net/lk_blog/article/details/7645661

安卓图表引擎AChartEngine(六) -框架源码结构图

http://blog.csdn.net/lk_blog/article/details/7645671