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我正在编写我的第一个图形应用程序，我在线上学习了一个教程。我正在使用AChartEngine，我有一个主要的活动，它有一个按钮。当按下按钮时，它假定绘制传递给它的数据，但是当按下按钮时，应用程序崩溃，我得到一个uncaught thread exception以及Could not execute main activity。我的应用程序崩溃了，因为我需要完全单独的活动才能显示图形？我想我可以在按下按钮后重置主屏幕以显示图形。感谢您的帮助！无法执行该活动的方法
05-07 18:44:10.720: W/dalvikvm(9057): threadid=1: thread exiting with uncaught exception (group=0x417bb898)
05-07 18:44:10.730: E/AndroidRuntime(9057): FATAL EXCEPTION: main
05-07 18:44:10.730: E/AndroidRuntime(9057): java.lang.IllegalStateException: Could not execute method of the activity
05-07 18:44:10.730: E/AndroidRuntime(9057): at android.view.View$1.onClick(View.java:3852)
05-07 18:44:10.730: E/AndroidRuntime(9057): at android.view.View.performClick(View.java:4489)
这是我的主要活动
package com.OhYea.graphthis;
import android.support.v7.app.ActionBarActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void LineGraphHandler (View view)
{
LineGraph line = new LineGraph();
Log.i("newgraph", "Line Graph");
Intent lineIntent = line.getIntent(this);
Log.i("get intent", "get intent");
startActivity(lineIntent);
Log.i("start activity", "activity started");
}
}
这里是我的活动，将数据传递到主活动进行绘图。
package com.OhYea.graphthis;
import org.achartengine.ChartFactory;
import org.achartengine.model.TimeSeries;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class LineGraph {
public Intent getIntent(Context context)
{
int[] x ={1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
int[] y ={30,34,45,57,77,89,100,111,123,145};
TimeSeries series = new TimeSeries ("Line1");
for(int i =0; i< x.length; i++)
{
series.add(x[i] , y[i]);
}
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
dataset.addSeries(series);
XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer();
XYSeriesRenderer renderer = new XYSeriesRenderer();
mRenderer.addSeriesRenderer(renderer);
Log.i("passing graph data", "Pass data to graph");
Intent intent = ChartFactory.getLineChartIntent(context, dataset, mRenderer, "Title");
return intent;
}
}