我有这个方法：
marker = new MarkerOptions().position(new LatLng(userlat, userlong));
marker.icon(BitmapDescriptorFactory.fromResource(R.drawable.marker));
map.addMarker(marker);
从数据库中获取一些值并将其放在谷歌地图标记上。我在这部分中遇到错误：
04-25 20:22:55.330 24534-29164/com.example.hatim.maps D/Single user Details: {"success":1,"user":[{"ID":"1223456789","fname":"lama","lname":"tat","phone":"2587598","longg":"46.739004409794056","latt":"24.729458546415405"}]}
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: Process: com.example.hatim.maps, PID: 24534
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: java.lang.RuntimeException: An error occurred while executing doInBackground()
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at android.os.AsyncTask$3.done(AsyncTask.java:309)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.util.concurrent.FutureTask.run(FutureTask.java:242)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.lang.Thread.run(Thread.java:818)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: Caused by: java.lang.IllegalStateException: Not on the main thread
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at maps.ce.i.b(Unknown Source)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at maps.db.c.a(Unknown Source)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at maps.ei.bu.a(Unknown Source)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at com.google.android.gms.maps.internal.e$a.onTransact(:com.google.android.gms.alldynamite:167)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at android.os.Binder.transact(Binder.java:387)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at com.google.android.gms.maps.internal.IGoogleMapDelegate$zza$zza.addMarker(Unknown Source)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at com.google.android.gms.maps.GoogleMap.addMarker(Unknown Source)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at com.example.hatim.maps.SearchResutl$getuser.doInBackground(SearchResutl.java:181)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at com.example.hatim.maps.SearchResutl$getuser.doInBackground(SearchResutl.java:156)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at android.os.AsyncTask$2.call(AsyncTask.java:295)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
04-25 20:22:55.350 24534-29164/com.example.hatim.maps E/AndroidRuntime: at java.lang.Thread.run(Thread.java:818)
我没有看到任何问题？
我得到的错误是：
<log4net xmlns="urn:log4net">
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<threshold value="All" />
<file value="../Logs/MyApp/myapp.log" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyy-MM-dd.'log'" />
<maxSizeRollBackups value="5" />
<maximumFileSize value="10MB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{HH':'mm':'ss'.'fff} [%4t] %-5p %M - %m %15property{ipAddress} - %property{orderId}%n" />
</layout>
</appender>
<appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">
<to value="<your to address>" />
<from value="<your from address>" />
<subject value="<your subject line>" />
<smtpHost value="<your smtp host>"/>
<username value="<your username>" />
<password value="<your password>" />
<port value="25" />
<authentication value="Basic" />
<evaluator type="log4net.Core.LevelEvaluator">
<threshold value="Error" />
</evaluator>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%newline[%property{log4net:HostName}] [%date] [%-5level] [%logger] - [%message]%newlineIp[%property{IpAddress}] Session[%property{SessionId}] OrderId[%property{OrderId}] UserAgent[%property{UserAgent}]%newline%newline%exception" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="RollingLogFileAppender" />
<appender-ref ref="SmtpAppender" />
</root>
</log4net>
答案 0 :(得分：3)
您无法从后台线程更新UI。要更新UI或添加标记以映射使用onPostExecute方法。你也可以用
runOnUiThread(new Runnable() {
@Override
public void run() {
// your UI updation
}
});
您正在使用AsyncTask，然后在onPostExecute方法中更新UI。更新您的AsyncTask，如下所示
class getuser extends AsyncTask<String, String, LatLng> {
@Override
protected LatLng doInBackground(String... strings) {
int success;
try {
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("ID", ID));
JSONObject json = jsonParser.makeHttpRequest(url_user_detials, "GET", params);
Log.d("Single user Details", json.toString());
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
JSONArray userObj = json.getJSONArray("user");
JSONObject user = userObj.getJSONObject(0);
String ln = user.getString("longg");
String lt = user.getString("latt");
String fn = user.getString("fname");
String lna = user.getString("lname");
String ph = user.getString("phone");
username=fn+" "+lna;
userphone=ph+"";
userlat= Double.parseDouble(lt);
userlong= Double.parseDouble(ln);
return new LatLng(userlat, userlong);
} else {
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(LatLng latLng) {
if(latLng != null){
marker = new MarkerOptions().position(latLng);
marker.icon(BitmapDescriptorFactory.fromResource(R.drawable.marker));
map.addMarker(marker);
}
}
}