随机发生器的XY图表

Question

我正在尝试为我的随机发生器创建一个动态图表，以保持抽取值。对于我使用的图形AChartEngine。我清楚我的方法，即使用异步任务机制通过动态图表的后台线程完成更新。但是我无法使用AChartEngine库来获取基本的XY图表。应用程序每次崩溃。这是我的基本XY图表的代码。

package com.example.graph2; 

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; 

import android.app.Activity; 
import android.graphics.Color; 
import android.os.Bundle; 
import android.widget.LinearLayout; 
import android.widget.LinearLayout.LayoutParams; 

public class Graph2Activity extends Activity { 
    private XYMultipleSeriesDataset RNG_Dataset = new XYMultipleSeriesDataset(); 
    private XYMultipleSeriesRenderer RNG_Renderer = new XYMultipleSeriesRenderer(); 
    public XYSeries RNG_CurrentSeries; 
    private GraphicalView RNG_ChartView; 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 


    RNG_Renderer.setAxisTitleTextSize(16); 
    RNG_Renderer.setChartTitleTextSize(20); 
    RNG_Renderer.setLabelsTextSize(15); 
    RNG_Renderer.setLegendTextSize(15); 
    RNG_Renderer.setMargins(new int[] {20, 30, 15, 0}); 
    RNG_Renderer.setAxesColor(Color.YELLOW); 

    String seriesTitle = "RNG"; 
    XYSeries series = new XYSeries(seriesTitle); 

    RNG_Dataset.addSeries(series); 
    RNG_CurrentSeries = series; 

    XYSeriesRenderer renderer = new XYSeriesRenderer(); 
    renderer.setColor(Color.RED); 
    RNG_Renderer.addSeriesRenderer(renderer); 
    setContentView(R.id.RNGchart); 
    } 

    protected void onResume() { 
    if (RNG_ChartView == null) { 
     LinearLayout layout = (LinearLayout) findViewById(R.id.RNGchart); 
     RNG_ChartView = ChartFactory.getLineChartView(this, RNG_Dataset, RNG_Renderer); 

     layout.addView(RNG_ChartView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); 
//  boolean enabled = HRDataset.getSeriesCount() > 0; 
//  setSeriesEnabled(enabled); 
    } else { 
     RNG_ChartView.repaint(); 
    } 
    } 
} 

这里是我使用的XML：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/RNGchart" android:orientation="horizontal" 
    android:layout_width="fill_parent" android:layout_height="300px" 
    android:layout_weight="1" />   

是否有人可以告诉我在哪里，我错了？ 这里是异常日志：

10-10 17:20:52.761: ERROR/AndroidRuntime(335): FATAL EXCEPTION: main 
10-10 17:20:52.761: ERROR/AndroidRuntime(335): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.graph2/com.example.graph2.Graph2Activity}: android.content.res.Resources$NotFoundException: Resource ID #0x7f050000 type #0x12 is not valid 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.os.Looper.loop(Looper.java:123) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.app.ActivityThread.main(ActivityThread.java:3683) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at java.lang.reflect.Method.invoke(Method.java:507) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at dalvik.system.NativeStart.main(Native Method) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335): Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f050000 type #0x12 is not valid 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.content.res.Resources.loadXmlResourceParser(Resources.java:1874) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.content.res.Resources.getLayout(Resources.java:731) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.view.LayoutInflater.inflate(LayoutInflater.java:318) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.app.Activity.setContentView(Activity.java:1657) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at com.example.graph2.Graph2Activity.onCreate(Graph2Activity.java:44) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 
10-10 17:20:52.761: ERROR/AndroidRuntime(335):  ... 11 more 


Here is the manifest file: 

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.graph2" 
    android:versionCode="1" 
    android:versionName="1.0"> 
<uses-sdk android:minSdkVersion="10" /> 

    <application android:icon="@drawable/icon" android:label="@string/app_name"> 
     <activity android:name=".Graph2Activity" 
       android:label="@string/app_name"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 
      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity android:name="org.achartengine.chartdemo.demo.chart.XYChartBuilder" /> 
    <activity android:name="org.achartengine.GraphicalActivity" /> 
    <activity android:name=".GeneratedChartDemo" /> 
    </application> 
    </manifest> 

Answer 1

您可以签我的完整Demo从here

试试这个，

<activity android:name="com.example.graph2.Graph2Activity" 
       android:label="@string/app_name"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 
      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 

，并确保您Graph2Activity活动是com.example.graph2内包。