我想在 asynctask 中解析我的 xml，因为在 android 4.0 + 上没有 asynctask 它将无法工作。问题是我无法在我的 asynctask 的 listview 中写入我的字符串。
这是我的 xml 解析活动：
package de.heron.cloudbox;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.HashMap;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class AndroidXMLParsingActivity extends ListActivity{
String dwnload_file_path = "http://h.t-softec.de/heron.website.app/android/everhomeapp.xml";
String dest_file_path = "http://h.t-softec.de/heron.website.app/android/everhomeapp.xml";
Button b1;
ProgressDialog dialog = null;
///storage/emulated/0/everhomeapp.xml
// All static variables
static final String URL = "http://h.t-softec.de/heron.website.app/android/everhomeapp.xml";
//file:///storage/emulated/0/everhomeapp.xml
// XML node keys
static final String KEY_ITEM = "device"; // parent node
static final String KEY_ID = "deviceid";
static final String KEY_NAME = "devicename";
static final String KEY_actionid = "actions";
static final String KEY_actionid2 = "actions2";
static final String KEY_DESC = "devicetype";
static final String KEY_texton = "texton";
static final String KEY_textoff = "textoff";
ArrayList<String> mImageLink;
String[] actions = new String[] {
"Alle Räume",
"Wohnzimmer",
"Küche",
"Gäste-Wc"
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
overridePendingTransition( R.anim.leftright, R.anim.rightleft );
setTitle("Geräte");
getActionBar().setDisplayHomeAsUpEnabled(true);
ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();
try{
XMLParserLocal parser = new XMLParserLocal();
File file = new File("/sdcard/everhomeapp.xml");
InputStream is = new FileInputStream(file.getPath());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(is));
doc.getDocumentElement().normalize();
NodeList nl = doc.getElementsByTagName(KEY_ITEM);
for (int i = 0; i < nl.getLength(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_ID, parser.getValue(e, KEY_ID));
map.put(KEY_NAME, parser.getValue(e, KEY_NAME));
map.put(KEY_actionid, parser.getValue(e, KEY_actionid));
map.put(KEY_actionid2, parser.getValue(e, KEY_actionid2));
map.put(KEY_DESC, parser.getValue(e, KEY_DESC));
map.put(KEY_texton, parser.getValue(e, KEY_texton));
map.put(KEY_textoff, parser.getValue(e, KEY_textoff));
menuItems.add(map);
}
} catch (Exception e) {
System.out.println("XML Pasing Excpetion = " + e);
}
// Adding menuItems to ListView
ListAdapter adapter2 = new SimpleAdapter(this, menuItems,
R.layout.list_item,
new String[] { KEY_NAME, KEY_DESC, KEY_ID, KEY_actionid, KEY_texton, KEY_textoff}, new int[] {
R.id.name, R.id.desciption, R.id.cost, R.id.deviceid,R.id.on,R.id.off });
setListAdapter(adapter2);
// selecting single ListView item
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
String cost = ((TextView) view.findViewById(R.id.cost)).getText().toString();
String cost2 = ((TextView) view.findViewById(R.id.cost)).getText().toString();
String deviceid = ((TextView) view.findViewById(R.id.deviceid)).getText().toString();
String description = ((TextView) view.findViewById(R.id.desciption)).getText().toString();
String on = ((Button) view.findViewById(R.id.on)).getText().toString();
String off = ((Button) view.findViewById(R.id.off)).getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
in.putExtra(KEY_NAME, name);
in.putExtra(KEY_actionid, cost);
in.putExtra(KEY_actionid2, cost2);
in.putExtra(KEY_DESC, description);
in.putExtra(KEY_ID, deviceid);
in.putExtra(KEY_texton, on);
in.putExtra(KEY_textoff, off);
startActivity(in);
}
});
try {
URL url = new URL("http://h.t-softec.de/heron.website.app/android/everhomeapp.xml");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
File SDCardRoot = Environment.getExternalStorageDirectory();
File file = new File(SDCardRoot,"everhomeapp.xml");
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
int totalSize = urlConnection.getContentLength();
int downloadedSize = 0;
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
fileOutput.write(buffer, 0, bufferLength);
downloadedSize += bufferLength;
}
parseFile();
fileOutput.close();
} catch (MalformedURLException e) {
e.printStackTrace();
parseFile();
} catch (IOException e) {
e.printStackTrace();
parseFile();
}
}
public void parseFile(){
ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();
try{
XMLParserLocal parser = new XMLParserLocal();
File file = new File("/sdcard/everhomeapp.xml");
InputStream is = new FileInputStream(file.getPath());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(is));
doc.getDocumentElement().normalize();
NodeList nl = doc.getElementsByTagName(KEY_ITEM);
for (int i = 0; i < nl.getLength(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
map.put(KEY_ID, parser.getValue(e, KEY_ID));
map.put(KEY_NAME, parser.getValue(e, KEY_NAME));
map.put(KEY_actionid, parser.getValue(e, KEY_actionid));
map.put(KEY_actionid2, parser.getValue(e, KEY_actionid2));
map.put(KEY_DESC, parser.getValue(e, KEY_DESC));
map.put(KEY_texton, parser.getValue(e, KEY_texton));
map.put(KEY_textoff, parser.getValue(e, KEY_textoff));
menuItems.add(map);
}
} catch (Exception e) {
System.out.println("XML Pasing Excpetion = " + e);
}
ListAdapter adapter = new SimpleAdapter(this, menuItems,
R.layout.list_item,
new String[] { KEY_NAME, KEY_DESC, KEY_ID, KEY_actionid, KEY_texton, KEY_textoff}, new int[] {
R.id.name, R.id.desciption, R.id.cost, R.id.deviceid,R.id.on,R.id.off });
setListAdapter(adapter);
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
String cost = ((TextView) view.findViewById(R.id.cost)).getText().toString();
String deviceid = ((TextView) view.findViewById(R.id.deviceid)).getText().toString();
String description = ((TextView) view.findViewById(R.id.desciption)).getText().toString();
String on = ((Button) view.findViewById(R.id.on)).getText().toString();
String off = ((Button) view.findViewById(R.id.off)).getText().toString();
Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
in.putExtra(KEY_NAME, name);
in.putExtra(KEY_actionid, cost);
in.putExtra(KEY_DESC, description);
in.putExtra(KEY_ID, deviceid);
in.putExtra(KEY_texton, on);
in.putExtra(KEY_textoff, off);
startActivity(in);
}
});
}
public void parsexmllocal(){
mImageLink = new ArrayList<String>();
try{
File file = new File("mnt/sdcard/kursywalut.xml");
InputStream is = new FileInputStream(file.getPath());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(is));
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("image");
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
Element fstElmnt = (Element) node;
mImageLink.add(fstElmnt.getAttribute("link"));
}
} catch (Exception e) {
System.out.println("XML Pasing Excpetion = " + e);
}
}
public void downloadFile(String url, String dest_file_path) {
try {
File dest_file = new File(dest_file_path);
URL u = new URL(url);
URLConnection conn = u.openConnection();
int contentLength = conn.getContentLength();
DataInputStream stream = new DataInputStream(u.openStream());
byte[] buffer = new byte[contentLength];
stream.readFully(buffer);
stream.close();
DataOutputStream fos = new DataOutputStream(new FileOutputStream(dest_file));
fos.write(buffer);
fos.flush();
fos.close();
hideProgressIndicator();
} catch(FileNotFoundException e) {
hideProgressIndicator();
return;
} catch (IOException e) {
hideProgressIndicator();
return;
}
}
void hideProgressIndicator(){
runOnUiThread(new Runnable() {
public void run() {
dialog.dismiss();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity_main, menu);
return super.onCreateOptionsMenu(menu);
}
public void clicksound(View view){
MediaPlayer mp = MediaPlayer.create(this, R.raw.clicksound);
mp.start();
}
public boolean onMenuItemSelected(int featureId, MenuItem item) {
int itemId = item.getItemId();
switch (itemId) {
case R.id.refresh:
try {
URL url = new URL("http://h.t-softec.de/heron.website.app/android/everhomeapp.xml");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
File SDCardRoot = Environment.getExternalStorageDirectory();
File file = new File(SDCardRoot,"everhomeapp.xml");
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
int totalSize = urlConnection.getContentLength();
int downloadedSize = 0;
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
fileOutput.write(buffer, 0, bufferLength);
downloadedSize += bufferLength;
}
Toast.makeText(this, "Geräteliste erfolgreich aktualisiert!", Toast.LENGTH_LONG).show();
fileOutput.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Handler handler4 = new Handler();
handler4.postDelayed(new Runnable()
{
@Override
public void run()
{
parseFile();
}
}, 100);
break;
case R.id.change:
Intent i = new Intent(this, SettingsActivity.class);
startActivity(i);
break;
case android.R.id.home:
Intent i2 = new Intent(this, AndroidXMLParsingActivity2.class);
startActivity(i2);
break;
}
return true;
}
}
这是我的单身活动：
package de.heron.cloudbox;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class SingleMenuItemActivity extends Activity {
EditText txtCode;
// XML node keys
static final String KEY_NAME = "name";
static final String KEY_actionid = "cost";
static final String KEY_actionid2 = "cost2";
static final String KEY_DESC = "description";
static final String KEY_ID = "deviceid";
static final String KEY_texton = "texton";
static final String KEY_textoff = "textoff";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.single_list_item);
// getting intent data
Intent in = getIntent();
// Get XML values from previous intent
String name = in.getStringExtra(KEY_NAME);
String cost = in.getStringExtra(KEY_actionid);
String cost2 = in.getStringExtra(KEY_actionid2);
String description = in.getStringExtra(KEY_DESC);
String deviceid = in.getStringExtra(KEY_ID);
String on = in.getStringExtra(KEY_texton);
String off = in.getStringExtra(KEY_textoff);
// Displaying all values on the screen
TextView lblName = (TextView) findViewById(R.id.name_label);
TextView lblCost = (TextView) findViewById(R.id.cost_label);
TextView lblDesc = (TextView) findViewById(R.id.description_label);
TextView lblid = (TextView) findViewById(R.id.id_label);
// TextView lblon = (Button) findViewById(R.id.on);
// TextView lbloff = (Button) findViewById(R.id.off);
Button lblon = (Button)findViewById(R.id.on);
lblon.getText().toString();
lblon.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
SharedPreferences settings = getSharedPreferences("UserInfo", 0);
txtCode.setText(settings.getString("Code", "").toString());
String[] url={"http://everhome.de/api/applive/", (settings.getString("Code", "")), "/" + KEY_ID,"/" + KEY_actionid};
new onoff(SingleMenuItemActivity.this).execute(url);
}});
Button lbloff = (Button)findViewById(R.id.off);
lbloff.getText().toString();
lbloff.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String[] url={"http://everhome.de/api/applive/", "8ef43502ad3dc04f87b4a48b993878c0","/" + KEY_ID,"/" + KEY_actionid2};
new onoff(SingleMenuItemActivity.this).execute(url);
}
});
lblName.setText(name);
lblCost.setText(cost);
lblCost.setText(cost2);
lblDesc.setText(description);
lblid.setText(deviceid);
lblon.setText(on);
lbloff.setText(off);
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setIcon(R.drawable.ic_launcher);
setTitle("Geräte");
Button devices = (Button) findViewById(R.id.devices);
devices.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(SingleMenuItemActivity.this, AndroidXMLParsingActivity.class);
startActivity(i);
}
});
Button scenes = (Button) findViewById(R.id.scenes);
scenes.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(SingleMenuItemActivity.this, AndroidXMLParsingActivity2.class);
startActivity(i);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity_main, menu);
return super.onCreateOptionsMenu(menu);
}
public boolean onMenuItemSelected(int featureId, MenuItem item) {
int itemId = item.getItemId();
switch (itemId) {
case R.id.refresh:
break;
}
return true;
}
}
我希望任何人都可以帮助我解决我的问题。更新：
那是使用 asynctask 的测试：
class xmlparse extends AsyncTask<Void, Void, Void> {
static final String KEY_ITEM = "device"; // parent node
static final String KEY_ID = "deviceid";
static final String KEY_NAME = "devicename";
static final String KEY_actionid = "actions";
static final String KEY_actionid2 = "actions2";
static final String KEY_DESC = "devicetype";
static final String KEY_texton = "texton";
static final String KEY_textoff = "textoff";
@Override
protected Void doInBackground(Void... params) {
/*
make connection & download XML here,
use your XML parser class object to parse the xml from here
create ArrayList & etc. from here...
*/
ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();
//
//File xml = parser.getXmlFromUrl(URL); // getting XML
//Document doc = parser.getDomElement(xml); // getting DOM element
try{
XMLParserLocal parser = new XMLParserLocal();
File file = new File("/sdcard/everhomeapp.xml");
InputStream is = new FileInputStream(file.getPath());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(is));
doc.getDocumentElement().normalize();
NodeList nl = doc.getElementsByTagName(KEY_ITEM);
// looping through all item nodes <item>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_ID, parser.getValue(e, KEY_ID));
map.put(KEY_NAME, parser.getValue(e, KEY_NAME));
map.put(KEY_actionid, parser.getValue(e, KEY_actionid));
map.put(KEY_actionid2, parser.getValue(e, KEY_actionid2));
map.put(KEY_DESC, parser.getValue(e, KEY_DESC));
map.put(KEY_texton, parser.getValue(e, KEY_texton));
map.put(KEY_textoff, parser.getValue(e, KEY_textoff));
// adding HashList to ArrayList
menuItems.add(map);
}
} catch (Exception e) {
System.out.println("XML Pasing Excpetion = " + e);
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// postexecute logic
super.onPostExecute(result);
}
@Override
protected void onPreExecute() {
// pre execute logic
super.onPreExecute();
}
}
但问题是我想用 listadapter 将字符串（菜单项）放在 listview 中：
ListAdapter adapter2 = new SimpleAdapter(this, menuItems,
R.layout.list_item,
new String[] { KEY_NAME, KEY_DESC, KEY_ID, KEY_actionid, KEY_texton, KEY_textoff}, new int[] {
R.id.name, R.id.desciption, R.id.cost, R.id.deviceid,R.id.on,R.id.off });
setListAdapter(adapter2);
// selecting single ListView item
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
String cost = ((TextView) view.findViewById(R.id.cost)).getText().toString();
String cost2 = ((TextView) view.findViewById(R.id.cost)).getText().toString();
String deviceid = ((TextView) view.findViewById(R.id.deviceid)).getText().toString();
String description = ((TextView) view.findViewById(R.id.desciption)).getText().toString();
String on = ((Button) view.findViewById(R.id.on)).getText().toString();
String off = ((Button) view.findViewById(R.id.off)).getText().toString();
而且我不知道当解析器在异步任务中运行时如何做到这一点。使解析器将菜单项放入列表适配器：
menuItems.add(map);