android中的achartengine不工作

我用的是阿卡汀。我的代码没有错误，但当它启动Get me error对话框并停止程序时

这是我的密码

BuyerActivity.java活动类

public class BuyersActivity extends Activity {

    private static final String DEFAULT = "N/A";
    public String user_data="";
    public static DefaultHttpClient client;
    String[] info=new String[5];
    String performance_graph="";
    public final static String EXTRA_MESSAGE = "com.mobile.bidnemo.MESSAGE";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_buyers);

        Downloadbasic db=new Downloadbasic();
        db.execute();
    }//

    public void showGraph(View view){
    PieGraph pie=new PieGraph();
    Intent lineIntent = pie.getIntent(this);
    startActivity(lineIntent);
    }


others code....
}

用于创建饼图的PieGraph.java

public class PieGraph {

    public Intent getIntent(Context context) {

        int[] values = { 1, 2, 3, 4, 5 };
        CategorySeries series = new CategorySeries("Pie Graph");
        int k = 0;
        for (int value : values) {
            series.add("Section " + ++k, value);
        }

        int[] colors = new int[] { Color.BLUE, Color.GREEN, Color.MAGENTA, Color.YELLOW, Color.CYAN };

        DefaultRenderer renderer = new DefaultRenderer();
        for (int color : colors) {
            SimpleSeriesRenderer r = new SimpleSeriesRenderer();
            r.setColor(color);
            renderer.addSeriesRenderer(r);
        }
        renderer.setChartTitle("Pie Chart Demo");
        renderer.setChartTitleTextSize(7);
        renderer.setZoomButtonsVisible(true);

        Intent intent = ChartFactory.getPieChartIntent(context, series, renderer, "Pie");
        return intent;
    }
}

我的日志在下面

 01-20 14:07:31.968: D/dalvikvm(18410): GC_CONCURRENT freed 526K, 10%
 free 14475K/16071K, paused 14ms+13ms, total 47ms 01-20 14:07:31.968:
 D/StrictMode(18410): StrictMode policy violation:
 android.os.StrictMode$StrictModeNetworkViolation: policy=31
 violation=4 01-20 14:07:31.968: D/StrictMode(18410):   at
 android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1124)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 01-20
 14:07:31.968: D/StrictMode(18410):     at
 libcore.io.IoBridge.connectErrno(IoBridge.java:127) 01-20
 14:07:31.968: D/StrictMode(18410):     at
 libcore.io.IoBridge.connect(IoBridge.java:112) 01-20 14:07:31.968:
 D/StrictMode(18410):   at
 java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 01-20
 14:07:31.968: D/StrictMode(18410):     at
 java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459) 01-20
 14:07:31.968: D/StrictMode(18410):     at
 java.net.Socket.connect(Socket.java:842) 01-20 14:07:31.968:
 D/StrictMode(18410):   at
 org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:670)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 com.mobile.bidnemo.BuyersActivity$Downloadbasic.doInBackground(BuyersActivity.java:141)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 com.mobile.bidnemo.BuyersActivity$Downloadbasic.doInBackground(BuyersActivity.java:1)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 android.os.AsyncTask$2.call(AsyncTask.java:287) 01-20 14:07:31.968:
 D/StrictMode(18410):   at
 java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 java.util.concurrent.FutureTask.run(FutureTask.java:137) 01-20
 14:07:31.968: D/StrictMode(18410):     at
 android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 01-20
 14:07:31.968: D/StrictMode(18410):     at
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
 01-20 14:07:31.968: D/StrictMode(18410):   at
 java.lang.Thread.run(Thread.java:856) 01-20 14:07:31.988:
 D/OpenGLRenderer(18410): Enabling debug mode 0 01-20 14:07:32.003:
 D/StrictMode(18410): StrictMode policy violation:
 android.os.StrictMode$StrictModeNetworkViolation: policy=31
 violation=4 01-20 14:07:32.003: D/StrictMode(18410):   at
 android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1124)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:163) 01-20
 14:07:32.003: D/StrictMode(18410):     at
 libcore.io.IoBridge.recvfrom(IoBridge.java:513) 01-20 14:07:32.003:
 D/StrictMode(18410):   at
 java.net.PlainSocketImpl.read(PlainSocketImpl.java:488) 01-20
 14:07:32.003: D/StrictMode(18410):     at
 java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46) 01-20
 14:07:32.003: D/StrictMode(18410):     at
 java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:103)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:191)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultResponseParser.java:82)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:174)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:180)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:235)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:259)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:279)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:428)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:670)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 com.mobile.bidnemo.BuyersActivity$Downloadbasic.doInBackground(BuyersActivity.java:141)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 com.mobile.bidnemo.BuyersActivity$Downloadbasic.doInBackground(BuyersActivity.java:1)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 android.os.AsyncTask$2.call(AsyncTask.java:287) 01-20 14:07:32.003:
 D/StrictMode(18410):   at
 java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 java.util.concurrent.FutureTask.run(FutureTask.java:137) 01-20
 14:07:32.003: D/StrictMode(18410):     at
 android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 01-20
 14:07:32.003: D/StrictMode(18410):     at
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
 01-20 14:07:32.003: D/StrictMode(18410):   at
 java.lang.Thread.run(Thread.java:856) 01-20 14:07:32.233:
 D/SensorManager(18410): unregisterListener:: Trklfufi 9
 budiwrd5mrfo5WirfulblrwuFmfulTrklfufi$KfukwiFmfulTrklfufiRvht@,*eca(c(
 01-20 14:07:32.233: D/Sensors(18410): Remain listener = Sending ..
 normal delay 200ms 01-20 14:07:32.233: I/Sensors(18410): sendDelay ---
 200000000 01-20 14:07:32.233: D/SensorManager(18410): JNI - sendDelay
 01-20 14:07:32.233: I/SensorManager(18410): Set normal delay = true
 01-20 14:07:33.043: D/AndroidRuntime(18410): Shutting down VM 01-20
 14:07:33.043: W/dalvikvm(18410): threadid=1: thread exiting with
 uncaught exception (group=0x413072a0) 01-20 14:07:33.053:
 E/AndroidRuntime(18410): FATAL EXCEPTION: main 01-20 14:07:33.053:
 E/AndroidRuntime(18410): java.lang.IllegalStateException: Could not
 execute method of the activity 01-20 14:07:33.053:
 E/AndroidRuntime(18410):   at
 android.view.View$1.onClick(View.java:3724) 01-20 14:07:33.053:
 E/AndroidRuntime(18410):   at
 android.view.View.performClick(View.java:4261) 01-20 14:07:33.053:
 E/AndroidRuntime(18410):   at
 android.view.View$PerformClick.run(View.java:17356) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 android.os.Handler.handleCallback(Handler.java:615) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 android.os.Handler.dispatchMessage(Handler.java:92) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 android.os.Looper.loop(Looper.java:137) 01-20 14:07:33.053:
 E/AndroidRuntime(18410):   at
 android.app.ActivityThread.main(ActivityThread.java:4921) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 java.lang.reflect.Method.invokeNative(Native Method) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 java.lang.reflect.Method.invoke(Method.java:511) 01-20 14:07:33.053:
 E/AndroidRuntime(18410):   at
 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
 01-20 14:07:33.053: E/AndroidRuntime(18410):   at
 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 dalvik.system.NativeStart.main(Native Method) 01-20 14:07:33.053:
 E/AndroidRuntime(18410): Caused by:
 java.lang.reflect.InvocationTargetException 01-20 14:07:33.053:
 E/AndroidRuntime(18410):   at
 java.lang.reflect.Method.invokeNative(Native Method) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 java.lang.reflect.Method.invoke(Method.java:511) 01-20 14:07:33.053:
 E/AndroidRuntime(18410):   at
 android.view.View$1.onClick(View.java:3719) 01-20 14:07:33.053:
 E/AndroidRuntime(18410):   ... 11 more 01-20 14:07:33.053:
 E/AndroidRuntime(18410): Caused by: java.lang.NullPointerException
 01-20 14:07:33.053: E/AndroidRuntime(18410):   at
 android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
 01-20 14:07:33.053: E/AndroidRuntime(18410):   at
 android.app.Activity.startActivityForResult(Activity.java:3428) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 android.app.Activity.startActivityForResult(Activity.java:3389) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 android.app.Activity.startActivity(Activity.java:3599) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 android.app.Activity.startActivity(Activity.java:3567) 01-20
 14:07:33.053: E/AndroidRuntime(18410):     at
 com.mobile.bidnemo.BuyersActivity.showGraph(BuyersActivity.java:111)
 01-20 14:07:33.053: E/AndroidRuntime(18410):   ... 14 more 01-20
 14:07:43.153: I/Process(18410): Sending signal. PID: 18410 SIG: 9
 01-20 14:08:51.258: D/dalvikvm(18735): GC_FOR_ALLOC freed 71K, 9% free
 12333K/13511K, paused 31ms, total 31ms 01-20 14:08:51.358:
 E/SensorManager(18735): thread start 01-20 14:08:51.363:
 D/SensorManager(18735): registerListener :: handle = 0  name= K3DH
 Acceleration Sensor delay= 200000 Trklfufi 9
 budiwrd5mrfo5WirfulblrwuFmfulTrklfufi$KfukwiFmfulTrklfufiRvht@,*ece,88
 01-20 14:08:51.388: D/dalvikvm(18735): GC_CONCURRENT freed 177K, 9%
 free 12639K/13831K, paused 2ms+2ms, total 16ms 01-20 14:08:51.428:
 D/SensorManager(18735): unregisterListener:: Trklfufi 9
 budiwrd5mrfo5WirfulblrwuFmfulTrklfufi$KfukwiFmfulTrklfufiRvht@,*ece,88
 01-20 14:08:51.428: D/Sensors(18735): Remain listener = Sending ..
 normal delay 200ms 01-20 14:08:51.428: I/Sensors(18735): sendDelay ---
 200000000 01-20 14:08:51.428: D/SensorManager(18735): JNI - sendDelay
 01-20 14:08:51.428: I/SensorManager(18735): Set normal delay = true
 01-20 14:08:51.468: D/SensorManager(18735): registerListener :: handle
 = 0  name= K3DH Acceleration Sensor delay= 200000 Trklfufi 9 budiwrd5mrfo5WirfulblrwuFmfulTrklfufi$KfukwiFmfulTrklfufiRvht@,*ece,88
 01-20 14:08:51.513: D/libEGL(18735): loaded
 /system/lib/egl/libEGL_mali.so 01-20 14:08:51.523: D/libEGL(18735):
 loaded /system/lib/egl/libGLESv1_CM_mali.so 01-20 14:08:51.528:
 D/libEGL(18735): loaded /system/lib/egl/libGLESv2_mali.so 01-20
 14:08:51.528: D/(18735): Device driver API match 01-20 14:08:51.528:
 D/(18735): Device driver API version: 10 01-20 14:08:51.528:
 D/(18735): User space API version: 10  01-20 14:08:51.528: D/(18735):
 mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Thu Oct 25 08:43:05 KST
 2012  01-20 14:08:51.568: D/OpenGLRenderer(18735): Enabling debug mode
 0 01-20 14:08:51.703: D/dalvikvm(18735): GC_FOR_ALLOC freed 139K, 9%
 free 12883K/14023K, paused 12ms, total 12ms 01-20 14:08:51.723:
 D/dalvikvm(18735): GC_FOR_ALLOC freed 164K, 10% free 13003K/14343K,
 paused 13ms, total 13ms 01-20 14:08:51.738: D/dalvikvm(18735):
 GC_FOR_ALLOC freed <1K, 9% free 13129K/14343K, paused 13ms, total 13ms
 01-20 14:08:51.758: D/dalvikvm(18735): GC_FOR_ALLOC freed 135K, 10%
 free 13250K/14599K, paused 11ms, total 11ms 01-20 14:08:51.758:
 I/dalvikvm-heap(18735): Grow heap (frag case) to 13.992MB for
 133336-byte allocation 01-20 14:08:51.773: D/dalvikvm(18735):
 GC_FOR_ALLOC freed <1K, 10% free 13380K/14791K, paused 11ms, total
 11ms 01-20 14:08:51.783: D/dalvikvm(18735): GC_FOR_ALLOC freed 0K, 10%
 free 13380K/14791K, paused 11ms, total 11ms 01-20 14:08:51.783:
 I/dalvikvm-heap(18735): Grow heap (frag case) to 14.218MB for
 237568-byte allocation 01-20 14:08:51.798: D/dalvikvm(18735):
 GC_FOR_ALLOC freed 0K, 10% free 13612K/15047K, paused 10ms, total 10ms
 01-20 14:08:51.808: D/dalvikvm(18735): GC_FOR_ALLOC freed 130K, 11%
 free 13484K/15047K, paused 11ms, total 11ms 01-20 14:08:51.808:
 I/dalvikvm-heap(18735): Grow heap (frag case) to 14.355MB for
 274976-byte allocation 01-20 14:08:51.828: D/dalvikvm(18735):
 GC_FOR_ALLOC freed <1K, 11% free 13752K/15367K, paused 10ms, total
 10ms 01-20 14:08:51.838: D/dalvikvm(18735): GC_FOR_ALLOC freed 0K, 11%
 free 13752K/15367K, paused 11ms, total 11ms 01-20 14:08:51.843:
 I/dalvikvm-heap(18735): Grow heap (frag case) to 14.822MB for
 489956-byte allocation 01-20 14:08:51.863: D/dalvikvm(18735):
 GC_CONCURRENT freed 0K, 11% free 14231K/15879K, paused 11ms+2ms, total
 22ms 01-20 14:08:51.888: D/dalvikvm(18735): GC_FOR_ALLOC freed 397K,
 11% free 14262K/15879K, paused 10ms, total 10ms 01-20 14:08:51.908:
 D/SensorManager(18735): unregisterListener:: Trklfufi 9
 budiwrd5mrfo5WirfulblrwuFmfulTrklfufi$KfukwiFmfulTrklfufiRvht@,*ece,88
 01-20 14:08:51.908: D/Sensors(18735): Remain listener = Sending ..
 normal delay 200ms 01-20 14:08:51.908: I/Sensors(18735): sendDelay ---
 200000000 01-20 14:08:51.908: D/SensorManager(18735): JNI - sendDelay
 01-20 14:08:51.908: I/SensorManager(18735): Set normal delay = true
 01-20 14:08:51.938: D/StrictMode(18735): StrictMode policy violation:
 android.os.StrictMode$StrictModeNetworkViolation: policy=31
 violation=4 01-20 14:08:51.938: D/StrictMode(18735):   at
 android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1124)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 01-20
 14:08:51.938: D/StrictMode(18735):     at
 libcore.io.IoBridge.connectErrno(IoBridge.java:127) 01-20
 14:08:51.938: D/StrictMode(18735):     at
 libcore.io.IoBridge.connect(IoBridge.java:112) 01-20 14:08:51.938:
 D/StrictMode(18735):   at
 java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 01-20
 14:08:51.938: D/StrictMode(18735):     at
 java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459) 01-20
 14:08:51.938: D/StrictMode(18735):     at
 java.net.Socket.connect(Socket.java:842) 01-20 14:08:51.938:
 D/StrictMode(18735):   at
 org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:670)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 com.mobile.bidnemo.BuyersActivity$Downloadbasic.doInBackground(BuyersActivity.java:141)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 com.mobile.bidnemo.BuyersActivity$Downloadbasic.doInBackground(BuyersActivity.java:1)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 android.os.AsyncTask$2.call(AsyncTask.java:287) 01-20 14:08:51.938:
 D/StrictMode(18735):   at
 java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 java.util.concurrent.FutureTask.run(FutureTask.java:137) 01-20
 14:08:51.938: D/StrictMode(18735):     at
 android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 01-20
 14:08:51.938: D/StrictMode(18735):     at
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
 01-20 14:08:51.938: D/StrictMode(18735):   at
 java.lang.Thread.run(Thread.java:856) 01-20 14:08:51.993:
 W/IInputConnectionWrapper(18735): showStatusIcon on inactive
 InputConnection 01-20 14:08:52.038: D/StrictMode(18735): StrictMode
 policy violation: android.os.StrictMode$StrictModeNetworkViolation:
 policy=31 violation=4 01-20 14:08:52.038: D/StrictMode(18735):     at
 android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1124)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:163) 01-20
 14:08:52.038: D/StrictMode(18735):     at
 libcore.io.IoBridge.recvfrom(IoBridge.java:513) 01-20 14:08:52.038:
 D/StrictMode(18735):   at
 java.net.PlainSocketImpl.read(PlainSocketImpl.java:488) 01-20
 14:08:52.038: D/StrictMode(18735):     at
 java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46) 01-20
 14:08:52.038: D/StrictMode(18735):     at
 java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:103)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:191)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultResponseParser.java:82)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:174)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:180)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:235)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:259)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:279)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:428)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:670)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 com.mobile.bidnemo.BuyersActivity$Downloadbasic.doInBackground(BuyersActivity.java:141)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 com.mobile.bidnemo.BuyersActivity$Downloadbasic.doInBackground(BuyersActivity.java:1)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 android.os.AsyncTask$2.call(AsyncTask.java:287) 01-20 14:08:52.038:
 D/StrictMode(18735):   at
 java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 java.util.concurrent.FutureTask.run(FutureTask.java:137) 01-20
 14:08:52.038: D/StrictMode(18735):     at
 android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 01-20
 14:08:52.038: D/StrictMode(18735):     at
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
 01-20 14:08:52.038: D/StrictMode(18735):   at
 java.lang.Thread.run(Thread.java:856) 01-20 14:09:01.053:
 D/dalvikvm(18735): GC_CONCURRENT freed 318K, 9% free 14553K/15879K,
 paused 12ms+23ms, total 57ms 01-20 14:09:03.288:
 D/AndroidRuntime(18735): Shutting down VM 01-20 14:09:03.298:
 W/dalvikvm(18735): threadid=1: thread exiting with uncaught exception
 (group=0x413072a0) 01-20 14:09:03.313: E/AndroidRuntime(18735): FATAL
 EXCEPTION: main 01-20 14:09:03.313: E/AndroidRuntime(18735):
 java.lang.IllegalStateException: Could not execute method of the
 activity 01-20 14:09:03.313: E/AndroidRuntime(18735):  at
 android.view.View$1.onClick(View.java:3724) 01-20 14:09:03.313:
 E/AndroidRuntime(18735):   at
 android.view.View.performClick(View.java:4261) 01-20 14:09:03.313:
 E/AndroidRuntime(18735):   at
 android.view.View$PerformClick.run(View.java:17356) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 android.os.Handler.handleCallback(Handler.java:615) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 android.os.Handler.dispatchMessage(Handler.java:92) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 android.os.Looper.loop(Looper.java:137) 01-20 14:09:03.313:
 E/AndroidRuntime(18735):   at
 android.app.ActivityThread.main(ActivityThread.java:4921) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 java.lang.reflect.Method.invokeNative(Native Method) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 java.lang.reflect.Method.invoke(Method.java:511) 01-20 14:09:03.313:
 E/AndroidRuntime(18735):   at
 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
 01-20 14:09:03.313: E/AndroidRuntime(18735):   at
 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 dalvik.system.NativeStart.main(Native Method) 01-20 14:09:03.313:
 E/AndroidRuntime(18735): Caused by:
 java.lang.reflect.InvocationTargetException 01-20 14:09:03.313:
 E/AndroidRuntime(18735):   at
 java.lang.reflect.Method.invokeNative(Native Method) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 java.lang.reflect.Method.invoke(Method.java:511) 01-20 14:09:03.313:
 E/AndroidRuntime(18735):   at
 android.view.View$1.onClick(View.java:3719) 01-20 14:09:03.313:
 E/AndroidRuntime(18735):   ... 11 more 01-20 14:09:03.313:
 E/AndroidRuntime(18735): Caused by: java.lang.NullPointerException
 01-20 14:09:03.313: E/AndroidRuntime(18735):   at
 android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
 01-20 14:09:03.313: E/AndroidRuntime(18735):   at
 android.app.Activity.startActivityForResult(Activity.java:3428) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 android.app.Activity.startActivityForResult(Activity.java:3389) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 android.app.Activity.startActivity(Activity.java:3599) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 android.app.Activity.startActivity(Activity.java:3567) 01-20
 14:09:03.313: E/AndroidRuntime(18735):     at
 com.mobile.bidnemo.BuyersActivity.showGraph(BuyersActivity.java:111)
 01-20 14:09:03.313: E/AndroidRuntime(18735):   ... 14 more 01-20
 14:09:27.243: I/Process(18735): Sending signal. PID: 18735 SIG: 9

---

根据日志，您有一个套接字问题，而不是与AChartEngine相关的问题。您在哪里使用此showGraph方法？