Parsing a XML file in Android Slows the Process

Question

I am parsing a XML file that is stored in my device SD card.It is taking approx above to start the activity .

this is what i am getting in my LOG

09-23 17:30:15.083: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 57ms
09-23 17:30:15.938: D/dalvikvm(27040): GC_CONCURRENT freed 1498K, 11% free 15192K/16887K, paused 12ms+13ms, total 122ms
09-23 17:30:15.939: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 98ms
09-23 17:30:16.772: D/dalvikvm(27040): GC_CONCURRENT freed 1939K, 13% free 15195K/17335K, paused 12ms+23ms, total 256ms
09-23 17:30:16.774: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 235ms
09-23 17:30:17.252: D/dalvikvm(27040): GC_CONCURRENT freed 1910K, 13% free 15204K/17335K, paused 1ms+3ms, total 161ms
09-23 17:30:17.253: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 98ms
09-23 17:30:17.955: D/dalvikvm(27040): GC_CONCURRENT freed 1912K, 13% free 15212K/17335K, paused 14ms+12ms, total 139ms
09-23 17:30:17.955: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 93ms
09-23 17:30:18.720: D/dalvikvm(27040): GC_CONCURRENT freed 1914K, 13% free 15217K/17335K, paused 13ms+3ms, total 153ms
09-23 17:30:18.722: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 86ms
09-23 17:30:19.349: D/dalvikvm(27040): GC_CONCURRENT freed 1912K, 13% free 15224K/17335K, paused 2ms+2ms, total 140ms
09-23 17:30:19.351: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 85ms
09-23 17:30:20.094: D/dalvikvm(27040): GC_CONCURRENT freed 1906K, 13% free 15232K/17335K, paused 2ms+13ms, total 169ms
09-23 17:30:20.096: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 157ms
09-23 17:30:21.848: D/dalvikvm(27040): GC_CONCURRENT freed 1899K, 13% free 15237K/17335K, paused 14ms+21ms, total 443ms
09-23 17:30:21.849: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 310ms
09-23 17:30:22.233: D/dalvikvm(27040): GC_CONCURRENT freed 1957K, 13% free 15245K/17399K, paused 5ms+2ms, total 96ms
09-23 17:30:22.234: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 70ms
09-23 17:30:22.589: D/dalvikvm(27040): GC_CONCURRENT freed 1912K, 13% free 15252K/17399K, paused 1ms+3ms, total 68ms
09-23 17:30:22.590: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 53ms
09-23 17:30:23.267: D/dalvikvm(27040): GC_CONCURRENT freed 1914K, 13% free 15258K/17399K, paused 3ms+198ms, total 454ms
09-23 17:30:23.268: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 435ms
09-23 17:30:23.639: D/dalvikvm(27040): GC_CONCURRENT freed 1912K, 13% free 15265K/17399K, paused 14ms+2ms, total 88ms
09-23 17:30:23.641: D/dalvikvm(27040): WAIT_FOR_CONCURRENT_GC blocked 49ms

Code Activity

resultTrips = (LinearLayout) findViewById(R.id.trip_list);
LinearLayout.LayoutParams mainTripDetailsLayout = new LinearLayout.LayoutParams(
        LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
LayoutInflater inflater = (LayoutInflater) getBaseContext()
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LinearLayout.LayoutParams forUnderLine = new LinearLayout.LayoutParams(
        LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
forUnderLine.setMargins(0, 0, 0, 0);
mainTripDetailsLayout.setMargins(0, 40, 0, 0);
File fXmlFile = new File("/storage/sdcard1/Android/myXML.xml");
if(fXmlFile.exists()){
    obj = new ParseMyXML();
    MyTripRespone data = obj.parseMyTripXML(fXmlFile);
    List<Approvals> listdata = data.getCoroprateBookingDetails();
    int i=0;
    for (Approvals elements : listdata) {

        TextView line = new TextView(this);
        line.setBackgroundResource(R.layout.shape_line);
        line.setLayoutParams(forUnderLine);
        if (i != 0) {
            resultTrips.addView(line);
        }

        final LinearLayout tripdetailsdata = (LinearLayout) inflater.inflate(
                R.layout.tripdetailsdata, null);
        try {
            tripDate = input.parse(elements.getJourneyDate());
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        tripdetailsdata.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
            Toast.makeText(getApplicationContext(), "this is my Toast message!!! =)", Toast.LENGTH_LONG).show();    
            }
        });
        i++;
    }
}
TextView dummy = new TextView(this);
dummy.setLayoutParams(mainTripDetailsLayout);
resultTrips.addView(dummy);

Please suggest me what changes i have to make so that my app becomes fast .It is very slow .Please suggest me i am new in android

yes, it will be great if you used the Asynctask and SAX parser. Below is the link http://www.jondev.net/articles/Android_XML_SAX_Parser_Example — Amit, Sep 23 '13 at 12:19
@BirajZalavadia which part i have to put in asynk and how please let me know i am new in android — Pooja Dubey, Sep 23 '13 at 12:20
@BirajZalavadia please help me how could i do this in AsyncTask — Pooja Dubey, Sep 23 '13 at 12:32
@PoojaDubey get to know asynctask first from the docs http://developer.android.com/reference/android/os/AsyncTask.html. If you don't know how to implement asynctask after reading docs come back and post what you have tried with asynctask — Raghunandan, Sep 23 '13 at 12:33
@Raghunandan i have already done this asynctask for Login part in app .but i am confused how i will return the data from doInBackground i am doing this on create MyTripRespone data = obj.parseMyTripXML(fXmlFile); so in need to return the data — Pooja Dubey, Sep 23 '13 at 12:36
@Raghunandan so please if u can help me with a sample i will be thank full to u — Pooja Dubey, Sep 23 '13 at 12:37
@PoojaDubey it depends on whether your asynctask is an inner class of the activity class or is it a separate if so you can use interface as call back. http://stackoverflow.com/questions/18723282/cant-post-response-from-asynctask-to-mainactivity/18723363#18723363 — Raghunandan, Sep 23 '13 at 12:37

score 1 · Answer 1 · answered Sep 23 '13 at 12:18

1

In my opinion mainn thing is not implement parser in GUI thread. Most simple way is use extension of AsyncTask to prase XML and show results in GUI thread.

answered Sep 23 '13 at 12:18

TommyNecessary

1,377
1
13
19

Developer · Accepted Answer · 2013-09-23T13:03:51.260

Updated Answer Try this

public class ParseXMLTask extends AsyncTask<String, Void, MyTripRespone> {
    ParseMyTripResponseXML obj;
    Context context;
    CallBack callBack;

    public ParseXMLTask(CallBack callBack) {
        this.callBack = callBack;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();

    }

    @Override
    protected MyTripRespone doInBackground(String... arg0) {
        obj = new ParseMyTripResponseXML();
        MyTripRespone data = obj.parseMyTripXML(SelfApprovals.fXmlFile);
        return data;
    }
    protected void onPostExecute(MyTripRespone result) {
        // TODO Auto-generated method stub
        super.onPostExecute(result);
        callBack.run(result);

    }
}

Parsing a XML file in Android Slows the Process

2 Answers2