我正在尝试编译曾经在一个月前工作的代码，但由于某种原因我在eclipse中再次启动它，现在我收到了这些奇怪的错误。我正在制作一个应用程序，它接收加速度计数据并以图形显示它，只需这样做。因为我觉得日食不与我合作，所以这变得非常头疼。
12-03 14:17:30.046: E/AndroidRuntime(368): FATAL EXCEPTION: main
12-03 14:17:30.046: E/AndroidRuntime(368): java.lang.VerifyError: com.example.test.Activity2
12-03 14:17:30.046: E/AndroidRuntime(368): at java.lang.Class.newInstanceImpl(Native Method)
12-03 14:17:30.046: E/AndroidRuntime(368): at java.lang.Class.newInstance(Class.java:1409)
12-03 14:17:30.046: E/AndroidRuntime(368): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
12-03 14:17:30.046: E/AndroidRuntime(368): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
12-03 14:17:30.046: E/AndroidRuntime(368): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
12-03 14:17:30.046: E/AndroidRuntime(368): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
12-03 14:17:30.046: E/AndroidRuntime(368): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
12-03 14:17:30.046: E/AndroidRuntime(368): at android.os.Handler.dispatchMessage(Handler.java:99)
12-03 14:17:30.046: E/AndroidRuntime(368): at android.os.Looper.loop(Looper.java:123)
12-03 14:17:30.046: E/AndroidRuntime(368): at android.app.ActivityThread.main(ActivityThread.java:3683)
12-03 14:17:30.046: E/AndroidRuntime(368): at java.lang.reflect.Method.invokeNative(Native Method)
12-03 14:17:30.046: E/AndroidRuntime(368): at java.lang.reflect.Method.invoke(Method.java:507)
12-03 14:17:30.046: E/AndroidRuntime(368): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
12-03 14:17:30.046: E/AndroidRuntime(368): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
12-03 14:17:30.046: E/AndroidRuntime(368): at dalvik.system.NativeStart.main(Native Method)
package com.example.test;
import java.util.Date;
import org.achartengine.ChartFactory;
import org.achartengine.GraphicalView;
import org.achartengine.chart.PointStyle;
import org.achartengine.model.TimeSeries;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;
import android.app.Activity;
import android.graphics.Color;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
public class Activity2 extends Activity implements SensorEventListener{
private static TimeSeries[] timeSeries;
private static XYMultipleSeriesDataset dataset;
private static XYMultipleSeriesRenderer renderer;
private static XYSeriesRenderer rendererSeries;
private static GraphicalView view;
private static Thread mThread;
private SensorManager sensorManager;
float x;
float y;
float z;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// generateCsvFile("Example1.csv");
sensorManager=(SensorManager)getSystemService(SENSOR_SERVICE);
sensorManager.registerListener(this,
sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_NORMAL);
dataset = new XYMultipleSeriesDataset();
renderer = new XYMultipleSeriesRenderer();
renderer.setAxesColor(Color.BLUE);
renderer.setAxisTitleTextSize(16);
renderer.setChartTitle("Time");
renderer.setChartTitleTextSize(15);
renderer.setFitLegend(true);
renderer.setGridColor(Color.LTGRAY);
renderer.setPanEnabled(false, false);
renderer.setPointSize((float)0.25);
renderer.setXTitle("Time");
renderer.setYTitle("XYZ");
renderer.setMargins( new int []{20, 30, 15, 0});
renderer.setZoomButtonsVisible(false);
renderer.setBarSpacing(4);
renderer.setShowGrid(true);
rendererSeries = new XYSeriesRenderer();
rendererSeries.setColor(Color.RED);
rendererSeries.setFillPoints(true);
rendererSeries.setPointStyle(PointStyle.CIRCLE);
renderer.addSeriesRenderer(rendererSeries);
rendererSeries = new XYSeriesRenderer();
rendererSeries.setColor(Color.BLUE);
rendererSeries.setFillPoints(true);
rendererSeries.setPointStyle(PointStyle.CIRCLE);
renderer.addSeriesRenderer(rendererSeries);
rendererSeries = new XYSeriesRenderer();
rendererSeries.setColor(Color.GREEN);
rendererSeries.setFillPoints(true);
rendererSeries.setPointStyle(PointStyle.CIRCLE);
renderer.addSeriesRenderer(rendererSeries);
timeSeries = new TimeSeries[3];
timeSeries[0] = new TimeSeries("Random 0");
timeSeries[1] = new TimeSeries("Random 1");
timeSeries[2] = new TimeSeries("Random 2");
timeSeries[0].add(new Date(), x);
timeSeries[1].add(new Date(), y);
timeSeries[2].add(new Date(), z);
}
/*private static void generateCsvFile(String sFileName)
{
try
{
File root = Environment.getExternalStorageDirectory();
File gpxfile = new File(root, sFileName);
FileWriter writer = new FileWriter(gpxfile);
writer.append("Emp_Name");
writer.append(',');
writer.append("Adress");
writer.append('\n');
writer.append("hussain");
writer.append(',');
writer.append("Delhi");
writer.append('\n');
//generate whatever data you want
writer.flush();
writer.close();
}
catch(IOException e)
{
e.printStackTrace();
}
}
*/
public void onAccuracyChanged(Sensor sensor,int accuracy){
}
public void onSensorChanged(SensorEvent event){
// check sensor type
if(event.sensor.getType()==Sensor.TYPE_ACCELEROMETER){
// assign directions
x=event.values[0];
y=event.values[1];
z=event.values[2];
}
}
@Override
protected void onStart() {
super.onStart();
dataset.addSeries(timeSeries[0]);
dataset.addSeries(timeSeries[1]);
dataset.addSeries(timeSeries[2]);
view = ChartFactory.getTimeChartView(this, dataset, renderer, "Test");
view.refreshDrawableState();
view.repaint();
setContentView(view);
mThread = new Thread(){
public void run(){
while(true){
try {
Thread.sleep(300L);
} catch (InterruptedException e) {
e.printStackTrace();
}
timeSeries[0].add(new Date(), x);
timeSeries[1].add(new Date(), y);
timeSeries[2].add(new Date(), z);
view.repaint();
}
}
};
mThread.start();
}
}
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.test"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:debuggable="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Activity2"
android:label="@string/title_activity_activity2" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.test.MainActivity" />
</activity>
</application>
</manifest>
答案 0 :(得分：3)
尝试使用
如果没有解决问题，请尝试
我已经在我的设备上运行了您的活动，但它没有错误。