Android: Xmlserializer 不遵守缩进

Question

长话短说，我正在开发一个 android 应用程序，用于收集动态数据并创建 KML 文件以显示带有 self-calibration 传感器的驾驶特性。我想使用 XMLserializer 使用获得的数据创建一个 KML 文件，这是管理文件创建过程的服务（它可以运行多次，这就是为什么它不会总是关闭文件）：

File file = new File(sp.getString(getResources().getString(R.string.filesdir_key),"error"));
if (file.getPath().equals("error")) {
    file = new File (Environment.getExternalStoragePublicDirectory("/smart-drive").toString()
+ "/SmaDri_" + sp.getString(getResources().getString(R.string.ruta_key),"00000000_0000"));
    file.mkdirs();
}
finalFile = new File (file,"Final.kml");

if(!finalFile.exists()) {
    try {
        finalFile.createNewFile();
        Log.d(TAG, "RefreshKML: creando " + finalFile.getPath());
    } catch (IOException e) {
        e.printStackTrace();
        Log.d(TAG, "RefreshKML: fallo al crear " + finalFile.getName());
    }
    start = true;
}
try{
    fileos = new FileOutputStream(finalFile,true);
} catch(FileNotFoundException e) {
    e.printStackTrace();
    Log.d(TAG,"RefreshKML: error abriendo "+finalFile.getName());
}

try {
    serializer = Xml.newSerializer();
    serializer.setOutput(fileos, "UTF-8");
    if (start) {
        kH.SerialStart(serializer, fileos, "Ruta "+sp.getString(getResources().getString(R.string.ruta_key),"00000000_0000"));
        start = false;
    }

    int i=sp.getInt("poligonos",1);

    for (s=0 ; s<PolyArray.size() ; s++){
        polygon = PolyArray.get(s);
        kH.SerialPlacePol(serializer, fileos,"Tramo "+i, polygon);
        i++;
    }
    editor.putInt("poligonos",i);
    editor.apply();

    if (end) { //Solo cierra el archivo si se termina la recopilación de datos
        kH.SerialEnd(serializer, fileos);
        Log.d(TAG,"RefreshKML crea el cierre del KML");
        end=false; //En caso de que no se completó esta opción
        copyAllFiles();
        mainDB.close();
        DBHelper.close();
    }

    fileos.close();
} catch(IOException e) {
    e.printStackTrace();
    Log.d(TAG,"RefreshKML: error al escribir en serializer");
}

这些是我用来创建 header、body 和关闭 KML 文件的方法：

public void SerialStart (XmlSerializer serializer, FileOutputStream fileos, String docName ) {
    try{
        serializer.startDocument(null, Boolean.valueOf(true));
        serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true);
        serializer.startTag(null, "kml");
        serializer.attribute(null, "xmlns", "http://www.opengis.net/kml/2.2");
        serializer.attribute(null,"xmlns:gx", "http://www.google.com/kml/ext/2.2"); //ALE, para intentar que se vea en Earth
        serializer.attribute(null, "xmlns:kml", "http://www.opengis.net/kml/2.2");
        serializer.attribute(null, "xmlns:atom", "http://www.w3.org/2005/Atom");
        serializer.startTag(null, "Document");
        serializer.startTag(null, "name");
        serializer.text(docName);
        serializer.endTag(null, "name");
        serializer.startTag(null, "open");
        serializer.text("1");
        serializer.endTag(null, "open");
    } catch(Exception e){
        Log.d(TAG,"KMLHelper: Exception occured in SerialStart");
        e.printStackTrace();
    }
}
public void SerialPlacePol (XmlSerializer serializer, FileOutputStream fileos, String placeName, PolyKML poly ) {
    try{
        serializer.startTag(null, "Placemark");
        // He añadido el tag fill porque parece que Google Earth la exige

        serializer.startTag(null, "name");
        serializer.text(placeName);
        serializer.endTag(null, "name");

        serializer.startTag(null, "description");   //PARA DESCRIPCION TIEMPOS
        serializer.text(poly.gap);                  //PARA DESCRIPCION TIEMPOS
        serializer.endTag(null, "description");     //PARA DESCRIPCION TIEMPOS

        serializer.startTag(null, "Style");
        serializer.startTag(null, "LineStyle");

        serializer.startTag(null, "color");
        serializer.text(poly.getLineColor());
        serializer.endTag(null,"color");

        serializer.startTag(null, "width");
        serializer.text(poly.getLineWidth());
        serializer.endTag(null,"width");

        serializer.endTag(null,"LineStyle");
        serializer.startTag(null, "PolyStyle");

        serializer.startTag(null, "color");
        serializer.text(poly.getPolyColor());
        serializer.endTag(null,"color");

        //ALE
        serializer.startTag(null,"fill");
        serializer.text("1");
        serializer.endTag(null,"fill");
        //ALE

        serializer.endTag(null,"PolyStyle");
        serializer.endTag(null,"Style");

        serializer.startTag(null, "Polygon");

        serializer.startTag(null, "tessellate");
        if(poly.getTessellate()) serializer.text("1");
        else serializer.text("0");
        serializer.endTag(null,"tessellate");

        serializer.startTag(null, "extrude");
        if(poly.getExtrude()) serializer.text("1");
        else serializer.text("0");
        serializer.endTag(null,"extrude");

        serializer.startTag(null, "altitudeMode");
        serializer.text(poly.getAltitudeMode().toString());
        serializer.endTag(null,"altitudeMode");

        serializer.startTag(null, "outerBoundaryIs");
        serializer.startTag(null, "LinearRing");

        serializer.startTag(null, "coordinates");
        serializer.text(poly.getCoorString());
        serializer.endTag(null, "coordinates");

        serializer.endTag(null, "LinearRing");
        serializer.endTag(null, "outerBoundaryIs");
        serializer.endTag(null, "Polygon");
        serializer.endTag(null,"Placemark");
        serializer.flush(); //ALE
    }catch(Exception e){
        Log.d(TAG,"KMLHelper: Exception occured in SerialPlacePol");
        e.printStackTrace();
    }
}

public void SerialEnd (XmlSerializer serializer, FileOutputStream fileos ) {
    try{
        serializer.endTag(null,"Document");
        serializer.endTag(null,"kml");
        //serializer.endDocument();
        serializer.flush();
        fileos.close();
        Log.d(TAG,"KMLHelper: SerialEnd cierra archivo KML");
    }catch(Exception e){
        Log.d(TAG,"KMLHelper: Exception occured in SerialEnd");
        e.printStackTrace();
    }
}

结果很好，但是缩进，一段时间后就丢失了，它总是发生。缩进不同的结果文件示例如下，有一个缩进正确的地标，但突然以下完全没有缩进：

<Placemark>
  <name>Tramo 1</name>
  <description>1484689867000 - 1484689868000</description>
  <Style>
    <LineStyle>
      <color>55FFFFFF</color>
      <width>1</width>
    </LineStyle>
    <PolyStyle>
      <color>4114B464</color>
      <fill>1</fill>
    </PolyStyle>
  </Style>
  <Polygon>
    <tessellate>1</tessellate>
    <extrude>1</extrude>
    <altitudeMode>relativeToGround</altitudeMode>
    <outerBoundaryIs>
      <LinearRing>
        <coordinates>-4.46107189168431,36.7189079696287,1.0 -4.461074321984691,36.71889869818065,1.0 -4.46104946831569,36.718892230371296,1.0 -4.461047018015309,36.71890140181935,1.0 -4.46107189168431,36.7189079696287,1.0</coordinates>
      </LinearRing>
    </outerBoundaryIs>
  </Polygon>
</Placemark><Placemark><name>Tramo 1</name><description>-15 - -15</description><Style><LineStyle><color>55464646</color><width>1</width></LineStyle><PolyStyle><color>55FFFFFF</color><fill>1</fill></PolyStyle></Style><Polygon><tessellate>1</tessellate><extrude>1</extrude><altitudeMode>relativeToGround</altitudeMode><outerBoundaryIs><LinearRing><coordinates>-4.461042046219597,36.718907918437075,1.0 -4.461048518308548,36.71890698667229,1.0 -4.461047061691453,36.71889709332772,1.0 -4.461040613780402,36.71889802156293,1.0 -4.461042046219597,36.718907918437075,1.0</coordinates></LinearRing></outerBoundaryIs></Polygon></Placemark><Placemark><name>Tramo 1</name><description>-15 - -15</description><Style><LineStyle><color>55464646</color><width>1</width></LineStyle><PolyStyle><color>55FFFFFF</color><fill>1</fill></PolyStyle></Style><Polygon><tessellate>1</tessellate><extrude>1</extrude><altitudeMode>relativeToGround</altitudeMode><outerBoundaryIs><LinearRing><coordinates>-4.461038813540282,36.718908388824126,1.0 -4.461042046219597,36.718907918437075,1.0 -4.461040613780402,36.71889802156293,1.0 -4.461037386459718,36.71889849117587,1.0 -4.461038813540282,36.718908388824126,1.0</coordinates></LinearRing></outerBoundaryIs></Polygon></Placemark>

谁能告诉我导致丢失缩进的问题是什么？如果有任何想法可以帮助我解决这个问题，我将不胜感激

Answer 1

已解决，不止一个 XMLserializer 写入同一个文件，因此无法正常工作。现在一次只有 1 个线程可以访问和写入文件，问题消失了！

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