Created
March 3, 2016 08:47
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| package xmlpull.sample.jean.xmlpull; | |
| import android.app.ProgressDialog; | |
| import android.os.AsyncTask; | |
| import android.support.v7.app.AppCompatActivity; | |
| import android.os.Bundle; | |
| import android.util.*; | |
| import android.view.View; | |
| import android.widget.Button; | |
| import android.widget.TextView; | |
| import org.xmlpull.v1.XmlPullParser; | |
| import org.xmlpull.v1.XmlPullParserException; | |
| import org.xmlpull.v1.XmlPullParserFactory; | |
| import java.io.BufferedReader; | |
| import java.io.IOException; | |
| import java.io.InputStream; | |
| import java.io.InputStreamReader; | |
| import java.io.StringReader; | |
| import java.net.HttpURLConnection; | |
| import java.net.URL; | |
| public class MainActivity extends AppCompatActivity { | |
| TextView val_pm25; | |
| TextView val_time; | |
| ProgressDialog waiting_dialog; | |
| Button btn_update; | |
| String xml_tag = ""; | |
| String str_pm25; | |
| String str_publishTime; | |
| boolean b_inTargetCounty = false; | |
| boolean b_tagStart = false; | |
| @Override | |
| protected void onCreate(Bundle savedInstanceState) { | |
| super.onCreate(savedInstanceState); | |
| setContentView(R.layout.activity_main); | |
| val_pm25 = (TextView) findViewById(R.id.tv_val_pm25); | |
| val_time = (TextView) findViewById(R.id.tv_val_time); | |
| btn_update = (Button)findViewById(R.id.button_update); | |
| btn_update.setOnClickListener(new View.OnClickListener() { | |
| @Override | |
| public void onClick(View v) { | |
| new parseXMLTask().execute("http://opendata2.epa.gov.tw/AQX.xml"); | |
| } | |
| }); | |
| new parseXMLTask().execute("http://opendata2.epa.gov.tw/AQX.xml"); | |
| } | |
| private class parseXMLTask extends AsyncTask<String, Integer, Integer> { | |
| @Override | |
| protected void onPreExecute() { | |
| waiting_dialog = ProgressDialog.show(MainActivity.this, "請稍後", "資料更新中", true); | |
| } | |
| @Override | |
| protected Integer doInBackground(String... urls) { | |
| try { | |
| XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); | |
| factory.setNamespaceAware(true); | |
| XmlPullParser xpp = factory.newPullParser(); | |
| String result = resultFromURL(urls[0]); | |
| xpp.setInput(new StringReader(result)); | |
| // xpp.setInput(new StringReader("<foo>Hello World!</foo><bar>Hello World bar!</bar>")); | |
| int eventType = xpp.getEventType(); | |
| while (eventType != XmlPullParser.END_DOCUMENT) { | |
| if (eventType == XmlPullParser.START_DOCUMENT) { | |
| // Log.d("getEventType returned", "Start document"); | |
| } else if (eventType == XmlPullParser.START_TAG) { | |
| // Log.d("getEventType returned", "Start tag, named [" + xpp.getName() + "]"); | |
| b_tagStart = true; | |
| xml_tag = xpp.getName(); | |
| } else if (eventType == XmlPullParser.END_TAG) { | |
| // Log.d("getEventType returned", "End tag, named [" + xpp.getName() + "]"); | |
| b_tagStart = false; | |
| if ((b_inTargetCounty) && (xpp.getName().equals("Data"))) { | |
| b_inTargetCounty = false; | |
| } | |
| } else if (eventType == XmlPullParser.TEXT) { | |
| // Log.d("getEventType returned", "Text, the content [" + xpp.getText() + "]"); | |
| if ((xml_tag.equals("County")) && (xpp.getText().equals(getString(R.string.target_county)))) { | |
| b_inTargetCounty = true; | |
| } else if ((b_inTargetCounty) && (b_tagStart) && (xml_tag.equals("PM2.5"))) { | |
| str_pm25 = xpp.getText(); | |
| Log.d("TAG", "str_pm25 [" + str_pm25 + "]"); | |
| } else if ((b_inTargetCounty) && (b_tagStart) && (xml_tag.equals("PublishTime"))) { | |
| str_publishTime = xpp.getText(); | |
| Log.d("TAG", "str_publishTime [" + str_publishTime + "]"); | |
| } | |
| } | |
| eventType = xpp.next(); | |
| } | |
| // Log.d("getEventType returned", "End document"); | |
| } catch (XmlPullParserException e) { | |
| e.printStackTrace(); | |
| } catch (IOException e) { | |
| e.printStackTrace(); | |
| } | |
| return 1; | |
| } | |
| @Override | |
| protected void onPostExecute(Integer result) { | |
| val_pm25.setText(str_pm25); | |
| val_time.setText(str_publishTime); | |
| waiting_dialog.dismiss(); | |
| } | |
| } | |
| private String resultFromURL(String str_url) { | |
| String result = ""; | |
| URL url; | |
| HttpURLConnection urlConnection = null; | |
| try { | |
| url = new URL(str_url); | |
| urlConnection = (HttpURLConnection) url.openConnection(); | |
| InputStream in_s = urlConnection.getInputStream(); | |
| result = getStringFromInputStream(in_s); | |
| } catch (Exception e) { | |
| e.printStackTrace(); | |
| } finally { | |
| return result; | |
| } | |
| } | |
| private String getStringFromInputStream(InputStream is) { | |
| BufferedReader br = null; | |
| StringBuilder sb = new StringBuilder(); | |
| String line; | |
| try { | |
| br = new BufferedReader(new InputStreamReader(is)); | |
| while ((line = br.readLine()) != null) { | |
| sb.append(line); | |
| } | |
| } catch (IOException e) { | |
| e.printStackTrace(); | |
| } finally { | |
| if (br != null) { | |
| try { | |
| br.close(); | |
| } catch (IOException e) { | |
| e.printStackTrace(); | |
| } | |
| } | |
| } | |
| return sb.toString(); | |
| } | |
| } |
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