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无法在Android上显示多段线

2013-06-06 33 views
0

对不起，我的英文。无法在Android上显示多段线

我发展我的关于区域检测应用。 我想通过GPS检测android设备的位置，当它在Polyline上时，它会提醒用户。所以我想保留Polyline在本地存储。

但我不知道如何保持呢？

我的解决办法是：

  • 我把起点和终点（纬度，经度）在我的数据库，然后我将参数发送到maps.google.com，然后访问节点，然后写文档并从文档

错误 创建折线 - 它不能点击“风险区”后运行它仅显示在地图上的标记，但不显示的折线。它会崩溃。

MainActivity

import java.io.IOException; 
import java.io.InputStream; 
import java.util.ArrayList; 

import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory; 
import javax.xml.parsers.ParserConfigurationException; 

import org.apache.http.HttpResponse; 
import org.apache.http.client.ClientProtocolException; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.protocol.BasicHttpContext; 
import org.apache.http.protocol.HttpContext; 

import org.w3c.dom.Document; 
import org.w3c.dom.Node; 
import org.w3c.dom.NodeList; 
import org.xml.sax.SAXException; 

import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.MapFragment; 
import com.google.android.gms.maps.UiSettings; 
import com.google.android.gms.maps.GoogleMap.OnMarkerClickListener; 
import com.google.android.gms.maps.GoogleMapOptions; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.BitmapDescriptor; 
import com.google.android.gms.maps.model.BitmapDescriptorFactory; 
import com.google.android.gms.maps.model.GroundOverlayOptions; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.Marker; 
import com.google.android.gms.maps.model.MarkerOptions; 
import com.google.android.gms.maps.model.PolylineOptions; 

import android.R.color; 
import android.content.Context; 
import android.graphics.BitmapFactory.Options; 
import android.graphics.Color; 
import android.location.Criteria; 
import android.location.Location; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.support.v4.app.FragmentActivity; 

import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.Toast; 

public class MainActivity extends FragmentActivity { 

    GoogleMap mMap; 
    GoogleMapOptions option; 
    double lat=0; 
    double lng=0; 
    Direction md; 
    LatLng fromPosition = new LatLng(13.687140112679154, 100.53525868803263); 
    LatLng toPosition = new LatLng(13.683660045847258, 100.53900808095932); 
    PolylineOptions rectLine; 



    @Override 
    protected void onCreate(Bundle savedInstanceState) { 


     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 



     mMap = ((SupportMapFragment)getSupportFragmentManager() 
         .findFragmentById(R.id.map)).getMap(); 





     Button buttonNormal = (Button) findViewById(R.id.button1); 
     buttonNormal.setOnClickListener(new OnClickListener() { 
      public void onClick(View v) { 
       mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); 
      } 
     }); 

     Button buttonSatellite = (Button) findViewById(R.id.button2); 
     buttonSatellite.setOnClickListener(new OnClickListener() { 
      public void onClick(View v) { 
       mMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE); 
      } 
     }); 

     Button buttonTerrain = (Button) findViewById(R.id.button3); 
     buttonTerrain.setOnClickListener(new OnClickListener() { 
      public void onClick(View v) { 
       mMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN); 
      } 
     }); 

     Button buttonHybrid = (Button) findViewById(R.id.button4); 
     buttonHybrid.setOnClickListener(new OnClickListener() { 
      public void onClick(View v) { 
       mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID); 
      } 
     }); 

     Button buttonLocate = (Button) findViewById(R.id.button7); 
     buttonLocate.setOnClickListener(new OnClickListener() { 
      public void onClick(View v) { 
       Criteria criteria = new Criteria(); 
       LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
       String provider = locationManager.getBestProvider(criteria, false); 
       Location location = locationManager.getLastKnownLocation(provider); 
       double lat = location.getLatitude(); 
       double lng = location.getLongitude(); 
       LatLng coordinate = new LatLng(lat, lng); 

       mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(
         (coordinate), 15)); 
       mMap.addMarker(new MarkerOptions() 
         .position(coordinate) 
         .title("Prove") 
         .snippet("Family") 
         .draggable(true) 
         .icon(BitmapDescriptorFactory 
           .defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));     

       mMap.setOnMarkerClickListener(new OnMarkerClickListener() { 

        @Override 
        public boolean onMarkerClick(Marker arg0) { 
         // TODO Auto-generated method stub 
         arg0.remove(); 
         Toast.makeText(getApplicationContext(), 
           "Remove Marker" + String.valueOf(arg0.getId()), 
           Toast.LENGTH_SHORT).show(); 
         return false; 
        } 
       }); 

      } 
     }); 


     /*Button buttonPoly = (Button) findViewById(R.id.button6); 
     buttonPoly.setOnClickListener(new OnClickListener() { 
      public void onClick(View v) { 
       PolylineOptions rectLine = new PolylineOptions().add(
         new LatLng(lat, lng)) 
         .add(new LatLng(lat + 0.00001, lng + 0.0001)); 

       mMap.addPolyline(rectLine); 
      } 
     });*/ 

     Button buttonDest = (Button) findViewById(R.id.button5); 
     buttonDest.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 

       LatLng coordinates = new LatLng(13.685400079263206, 100.537133384495975);  
       mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(coordinates, 15)); 

       mMap.addMarker(new MarkerOptions().position(fromPosition).title("Start")); 
       mMap.addMarker(new MarkerOptions().position(toPosition).title("End")); 

       md=new Direction();   

       Document doc = md.getDocument(fromPosition, toPosition, md.MODE_DRIVING); 
       int duration = md.getDurationValue(doc); 
       String distance = md.getDistanceText(doc); 
       String start_address = md.getStartAddress(doc); 
       String copy_right = md.getCopyRights(doc); 

       ArrayList<LatLng> directionPoint = md.getDirection(doc); 
       PolylineOptions rectLine = new PolylineOptions().width(3).color(Color.RED); 

       for(int i = 0 ; i < directionPoint.size() ; i++) {   
        rectLine.add(directionPoint.get(i)); 
       } 

       mMap.addPolyline(rectLine); 


      } 
     }); 




    } 
}

Direction.java

import java.io.InputStream; 
import java.util.ArrayList; 

import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory; 

import org.apache.http.HttpResponse; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.protocol.BasicHttpContext; 
import org.apache.http.protocol.HttpContext; 
import org.w3c.dom.Document; 
import org.w3c.dom.Node; 
import org.w3c.dom.NodeList; 

import android.util.Log; 

import com.google.android.gms.maps.model.LatLng; 

public class Direction { 
    public final static String MODE_DRIVING = "driving"; 
    public final static String MODE_WALKING = "walking"; 

    public Direction(){ 

    } 

    public Document getDocument(LatLng start, LatLng end, String mode) { 
     String url = "http://maps.googleapis.com/maps/api/directions/xml?" 
       + "origin=" + start.latitude + "," + start.longitude 
       + "&destination=" + end.latitude + "," + end.longitude 
       + "&sensor=false&units=metric&mode=driving"; 

     try { 
      HttpClient httpClient = new DefaultHttpClient(); 
      HttpContext localContext = new BasicHttpContext(); 
      HttpPost httpPost = new HttpPost(url); 
      HttpResponse response = httpClient.execute(httpPost, localContext); 
      InputStream in = response.getEntity().getContent(); 
      DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder(); 
      Document doc = builder.parse(in); 
      return doc; 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
     return null; 
    } 

    public String getDurationText (Document doc) { 
     NodeList nl1 = doc.getElementsByTagName("duration"); 
     Node node1 = nl1.item(0); 
     NodeList nl2 = node1.getChildNodes(); 
     Node node2 = nl2.item(getNodeIndex(nl2, "text")); 
     Log.i("DurationText", node2.getTextContent()); 
     return node2.getTextContent(); 
    } 

    public int getDurationValue (Document doc) { 
     NodeList nl1 = doc.getElementsByTagName("duration"); 
     Node node1 = nl1.item(0); 
     NodeList nl2 = node1.getChildNodes(); 
     Node node2 = nl2.item(getNodeIndex(nl2, "value")); 
     Log.i("DurationValue", node2.getTextContent()); 
     return Integer.parseInt(node2.getTextContent()); 
    } 

    public String getDistanceText (Document doc) { 
     NodeList nl1 = doc.getElementsByTagName("distance"); 
     Node node1 = nl1.item(0); 
     NodeList nl2 = node1.getChildNodes(); 
     Node node2 = nl2.item(getNodeIndex(nl2, "text")); 
     Log.i("DistanceText", node2.getTextContent()); 
     return node2.getTextContent(); 
    } 

    public int getDistanceValue (Document doc) { 
     NodeList nl1 = doc.getElementsByTagName("distance"); 
     Node node1 = nl1.item(0); 
     NodeList nl2 = node1.getChildNodes(); 
     Node node2 = nl2.item(getNodeIndex(nl2, "value")); 
     Log.i("DistanceValue", node2.getTextContent()); 
     return Integer.parseInt(node2.getTextContent()); 
    } 

    public String getStartAddress (Document doc) { 
     NodeList nl1 = doc.getElementsByTagName("start_address"); 
     Node node1 = nl1.item(0); 
     Log.i("StartAddress", node1.getTextContent()); 
     return node1.getTextContent(); 
    } 

    public String getEndAddress (Document doc) { 
     NodeList nl1 = doc.getElementsByTagName("end_address"); 
     Node node1 = nl1.item(0); 
     Log.i("StartAddress", node1.getTextContent()); 
     return node1.getTextContent(); 
    } 

    public String getCopyRights (Document doc) { 
     NodeList nl1 = doc.getElementsByTagName("copyrights"); 
     Node node1 = nl1.item(0); 
     Log.i("CopyRights", node1.getTextContent()); 
     return node1.getTextContent(); 
    } 

    public ArrayList<LatLng> getDirection (Document doc) { 
     NodeList nl1, nl2, nl3; 
     ArrayList<LatLng> listGeopoints = new ArrayList<LatLng>(); 
     nl1 = doc.getElementsByTagName("step"); 
     if (nl1.getLength() > 0) { 
      for (int i = 0; i < nl1.getLength(); i++) { 
       Node node1 = nl1.item(i); 
       nl2 = node1.getChildNodes(); 

       Node locationNode = nl2.item(getNodeIndex(nl2, "start_location")); 
       nl3 = locationNode.getChildNodes(); 
       Node latNode = nl3.item(getNodeIndex(nl3, "lat")); 
       double lat = Double.parseDouble(latNode.getTextContent()); 
       Node lngNode = nl3.item(getNodeIndex(nl3, "lng")); 
       double lng = Double.parseDouble(lngNode.getTextContent()); 
       listGeopoints.add(new LatLng(lat, lng)); 

       locationNode = nl2.item(getNodeIndex(nl2, "polyline")); 
       nl3 = locationNode.getChildNodes(); 
       latNode = nl3.item(getNodeIndex(nl3, "points")); 
       ArrayList<LatLng> arr = decodePoly(latNode.getTextContent()); 
       for(int j = 0 ; j < arr.size() ; j++) { 
        listGeopoints.add(new LatLng(arr.get(j).latitude, arr.get(j).longitude)); 
       } 

       locationNode = nl2.item(getNodeIndex(nl2, "end_location")); 
       nl3 = locationNode.getChildNodes(); 
       latNode = nl3.item(getNodeIndex(nl3, "lat")); 
       lat = Double.parseDouble(latNode.getTextContent()); 
       lngNode = nl3.item(getNodeIndex(nl3, "lng")); 
       lng = Double.parseDouble(lngNode.getTextContent()); 
       listGeopoints.add(new LatLng(lat, lng)); 
      } 
     } 

     return listGeopoints; 
    } 

    private int getNodeIndex(NodeList nl, String nodename) { 
     for(int i = 0 ; i < nl.getLength() ; i++) { 
      if(nl.item(i).getNodeName().equals(nodename)) 
       return i; 
     } 
     return -1; 
    } 

    private ArrayList<LatLng> decodePoly(String encoded) { 
     ArrayList<LatLng> poly = new ArrayList<LatLng>(); 
     int index = 0, len = encoded.length(); 
     int lat = 0, lng = 0; 
     while (index < len) { 
      int b, shift = 0, result = 0; 
      do { 
       b = encoded.charAt(index++) - 63; 
       result |= (b & 0x1f) << shift; 
       shift += 5; 
      } while (b >= 0x20); 
      int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1)); 
      lat += dlat; 
      shift = 0; 
      result = 0; 
      do { 
       b = encoded.charAt(index++) - 63; 
       result |= (b & 0x1f) << shift; 
       shift += 5; 
      } while (b >= 0x20); 
      int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1)); 
      lng += dlng; 

      LatLng position = new LatLng((double) lat/1E5, (double) lng/1E5); 
      poly.add(position); 
     } 
     return poly; 
    } 
}

activity_main.xml中

<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 

    xmlns:tools="http://schemas.android.com/tools" 



    android:layout_width="match_parent" 
    android:layout_height="match_parent" > 

    <fragment  
     android:id="@+id/map" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 

     class="com.google.android.gms.maps.SupportMapFragment"/> 

    <LinearLayout 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" > 

     <Button 
      android:id="@+id/button1" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/btn_normal" 
      android:textSize="@dimen/textsize" /> 

     <Button 
      android:id="@+id/button2" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/btn_satellite" 
      android:textSize="@dimen/textsize" /> 

     <Button 
      android:id="@+id/button3" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/btn_terrain" 
      android:textSize="@dimen/textsize" /> 

     <Button 
      android:id="@+id/button4" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/btn_hybrid" 
      android:textSize="@dimen/textsize" /> 

     <Button 
      android:id="@+id/button7" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:text="@string/btn_locate" 
      android:textSize="@dimen/textsize" /> 

     <Button 
      android:id="@+id/button5" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:text="@string/btn_destination" 
      android:textSize="@dimen/textsize" /> 

    </LinearLayout> 

</RelativeLayout>

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="app.Disthanitian.thaistyle.EmerMez" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="8" 
     android:targetSdkVersion="17" /> 

    <uses-permission android:name="android.permission.INTERNET"/> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
    <uses-permission 
      android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/> 
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> 
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> 
    <uses-permission android:name="com.example.googlemapsv2.permission.MAPS_RECEIVE"/> 

    <permission 
     android:name="com.example.googlemapsv2.permission.MAPS_RECEIVE" 
     android:protectionLevel="signature"/> 

    <uses-feature android:glEsVersion="0x00020000" android:required="true"/> 

    <application 
     android:allowBackup="true" 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme"> 
     <activity 
      android:name="app.Disthanitian.thaistyle.EmerMez.MainActivity" 
      android:label="@string/app_name" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <meta-data 
      android:name="com.google.android.maps.v2.API_KEY" 
      android:value="AIzaSyBzRmlT-LnuOeDHpxByJJVq8cxc39JTDGg"/> 
    </application> 

</manifest>

logcat的

 06-06 10:35:34.032: I/ADM(1710): 2: 825935789: [INFO] hw_handler_u8500:849 Query: SELECT * FROM HW_Settings WHERE (Platform = 'AB8500') AND ('REF_Speaker_Playback_Music' IN (Dev1, Dev2, Dev3, Dev4, Dev5, Dev6))ORDER BY rowid LIMIT 1 
06-06 10:35:34.052: W/System.err(6196): android.os.NetworkOnMainThreadException 
06-06 10:35:34.052: W/System.err(6196):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118) 
06-06 10:35:34.052: W/System.err(6196):  at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 
06-06 10:35:34.052: W/System.err(6196):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 
06-06 10:35:34.062: W/System.err(6196):  at java.net.InetAddress.getAllByName(InetAddress.java:214) 
06-06 10:35:34.062: W/System.err(6196):  at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137) 
06-06 10:35:34.062: W/System.err(6196):  at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 
06-06 10:35:34.062: W/System.err(6196):  at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 
06-06 10:35:34.062: W/System.err(6196):  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 
06-06 10:35:34.062: W/System.err(6196):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
06-06 10:35:34.062: W/System.err(6196):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
06-06 10:35:34.072: W/System.err(6196):  at app.Disthanitian.thaistyle.EmerMez.Direction.getDocument(Direction.java:41) 
06-06 10:35:34.072: W/System.err(6196):  at app.Disthanitian.thaistyle.EmerMez.MainActivity$6.onClick(MainActivity.java:175) 
06-06 10:35:34.072: W/System.err(6196):  at android.view.View.performClick(View.java:4162) 
06-06 10:35:34.072: W/System.err(6196):  at android.view.View$PerformClick.run(View.java:17082) 
06-06 10:35:34.072: W/System.err(6196):  at android.os.Handler.handleCallback(Handler.java:615) 
06-06 10:35:34.072: W/System.err(6196):  at android.os.Handler.dispatchMessage(Handler.java:92) 
06-06 10:35:34.072: W/System.err(6196):  at android.os.Looper.loop(Looper.java:137) 
06-06 10:35:34.072: W/System.err(6196):  at android.app.ActivityThread.main(ActivityThread.java:4867) 
06-06 10:35:34.072: W/System.err(6196):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-06 10:35:34.082: W/System.err(6196):  at java.lang.reflect.Method.invoke(Method.java:511) 
06-06 10:35:34.082: W/System.err(6196):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007) 
06-06 10:35:34.082: W/System.err(6196):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774) 
06-06 10:35:34.082: W/System.err(6196):  at dalvik.system.NativeStart.main(Native Method) 
06-06 10:35:34.082: D/AndroidRuntime(6196): Shutting down VM 
06-06 10:35:34.082: W/dalvikvm(6196): threadid=1: thread exiting with uncaught exception (group=0x41c612a0) 
06-06 10:35:34.092: E/AndroidRuntime(6196): FATAL EXCEPTION: main 
06-06 10:35:34.092: E/AndroidRuntime(6196): java.lang.NullPointerException 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at app.Disthanitian.thaistyle.EmerMez.Direction.getDurationValue(Direction.java:62) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at app.Disthanitian.thaistyle.EmerMez.MainActivity$6.onClick(MainActivity.java:176) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at android.view.View.performClick(View.java:4162) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at android.view.View$PerformClick.run(View.java:17082) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at android.os.Handler.handleCallback(Handler.java:615) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at android.os.Handler.dispatchMessage(Handler.java:92) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at android.os.Looper.loop(Looper.java:137) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at android.app.ActivityThread.main(ActivityThread.java:4867) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at java.lang.reflect.Method.invoke(Method.java:511) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774) 
06-06 10:35:34.092: E/AndroidRuntime(6196):  at dalvik.system.NativeStart.main(Native Method) 
06-06 10:35:34.092: I/ADM(1710): 8: 825995695: [INFO] hw_handler_u8500:961 ste_adm_hw_handler_u8500: Found matching HW-settings: devices = ('REF_Speaker_Playback_Music', '', '', '', '', ''), d2dlogical-connections = ('', '', '', ''). 
06-06 10:35:34.162: I/ADM(1710): 7: 826061094: [INFO] dev:429 Device Speaker is OUTPUT 
06-06 10:35:34.162: I/ADM(1710): 9: 826061186: [INFO] dev_omx:1276 Enter dev_omx_setup_graph - device=Speaker, samplerate=44100, format=2, alloc_buffers=0, is_vc=0, bufsz=0 
06-06 10:35:34.162: E/android.os.Debug(2035): [email protected] > dumpstate -k -t -z -d -o /data/log/dumpstate_app_error

来源

2013-06-06 shiteru

+0

你的英语很好看:) – Raptor

回答

0

有在你的代码的两个错误，他们是不相关的Polylines。

android.os.NetworkOnMainThreadException

这意味着您正尝试在主线程上运行阻止代码。您需要使用AsyncTask，Thread，执行者或其他不阻止用户界面的方式。

java.lang.NullPointerException

内某处你Direction.getDurationValue（正好在62行）你想调用一个方法上null参考。

来源

2013-06-06 06:56:50

1

你Direction.java似乎F9 ......但你需要修改MainActivity，你想按钮执行点击的代码..通过AsynTask运行（即创建一个私有的类必须扩展AsyncTask）并在你的按钮上单击调用这个asyn-class的execute（）。

这必将解决您的10月6日至6日：35：34.052： W/System.err的（6196）：android.os.NetworkOnMainThreadException错误。希望这个wud也能解决例外，例如“java.lang.NullPointerException” ..因为“doc” - 对象本身可能为空，因为代码抛出一个NetworkException，进一步给出一个空响应&因此导致例外，无论你有“doc” -obj依赖... !!!

下面我附上了一个代码片段，你可以参考相同的..！ 柜面你想跟进，详细可以参考这个"show route on google-maps v2“

private class showRoute extends AsyncTask<Void, Void, Document>{  
      Document doc; 
      PolylineOptions rectLine;  

        @Override 
      protected Document doInBackground(Void... params) {  
      doc = md.getDocument(fromPosition, toPosition, GMapV2Direction.MODE_DRIVING);  
     ArrayList<LatLng> directionPoint = md.getDirection(doc); 
      rectLine = new PolylineOptions().width(3).color(Color.RED); 

      for(int i = 0 ; i < directionPoint.size() ; i++) {    
       rectLine.add(directionPoint.get(i)); 
      }   
       return null; 
      } 

      @Override 
      protected void onPostExecute(Document result) {   
       mMap.addPolyline(rectLine); 
      } 

     }

来源

2013-10-04 17:12:37

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