Question

好的，现在我正在尝试使用Name，Lat和Long填充Google地图。这些值通过PHP脚本从数据库传入。这一切都很好，工作正常。但我遇到了一个问题：我在AsyncTask中用标记填充地图。这是我得到错误

07-10 14:47:41.035: E/log_tag(21034): Error Parsing Data java.lang.IllegalStateException: Not on the main thread

这是我得到的唯一错误，并没有指明它的位置。我猜这是因为地图没有填充在主线程上？但我不能在主线程上做网络的东西，所以我无法从AsyncTask中删除它。关于如何解决这个问题的任何想法？感谢

代码：

public class MapActivity extends ActionBarActivity implements LocationListener {

private GoogleMap map;

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

    map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
            .getMap();

    MapLocations myTask = new MapLocations();
    myTask.execute();

}

private class MapLocations extends AsyncTask<Void, Void, Void> {
    String msg = "Done";
    ArrayList<Marker> arrayOfMarkers;

    // Decode image in background.
    @Override
    protected Void doInBackground(Void... params) {

        String result = "";
        InputStream isr = null;
        try {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost(
                    "MYPHPSCRIPT");
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity entity = response.getEntity();
            isr = entity.getContent();
            // resultView.setText("connected");
        } catch (Exception e) {
            Log.e("log_tag", "Error in http connection " + e.toString());
        }
        // convert response to string
        try {
            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(isr, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            isr.close();

            result = sb.toString();
        } catch (Exception e) {
            Log.e("log_tag", "Error  converting result " + e.toString());
        }

        // parse json data
        try {
            JSONArray jArray = new JSONArray(result);

            for (int i = 0; i < jArray.length(); i++) {
                final JSONObject json = jArray.getJSONObject(i);
                // counter++;

                map.addMarker(new MarkerOptions().position(
                        new LatLng(Double.parseDouble(json.getString("PlaceLat")), Double.parseDouble(json
                                .getString("PlaceLong")))).title(
                        json.getString("PlaceTitle")));
            }

        } catch (Exception e) {
            // TODO: handle exception
            Log.e("log_tag", "Error Parsing Data " + e.toString());
        }
        return null;
    }
}

}

错误基于此代码尝试{ JSONArray jArray = new JSONArray（result）;

            for (int i = 0; i < jArray.length(); i++) {
                final JSONObject json = jArray.getJSONObject(i);
                // counter++;

                map.addMarker(new MarkerOptions().position(
                        new LatLng(Double.parseDouble(json.getString("PlaceLat")), Double.parseDouble(json
                                .getString("PlaceLong")))).title(
                        json.getString("PlaceTitle")));
            }

Answer 1

就在这里

map.addMarker(new MarkerOptions().position(
                        new LatLng(Double.parseDouble(json.getString("PlaceLat")), Double.parseDouble(json
                                .getString("PlaceLong")))).title(
                        json.getString("PlaceTitle")));

由于错误明确指出，您无法在主线程的地图上添加内容。创建一个积分列表然后将其传递给您的onPostExecute并在那里进行绘图

错误解析数据java.lang.IllegalStateException：填充Google地图时不在主线程上

1 个答案: