Mega Code Archive
Access a Web service using GET
<![CDATA[
package app.test;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
public class Test extends Activity {
ImageView img;
private class BackgroundTask extends AsyncTask<String, Void, Bitmap> {
protected Bitmap doInBackground(String... url) {
// ---download an image---
Bitmap bitmap = DownloadImage(url[0]);
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return bitmap;
}
protected void onPostExecute(Bitmap bitmap) {
ImageView img = (ImageView) findViewById(R.id.img);
img.setImageBitmap(bitmap);
}
}
private InputStream OpenHttpConnection(String urlString) throws IOException {
InputStream in = null;
int response = -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection))
throw new IOException("Not an HTTP connection");
try {
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK) {
in = httpConn.getInputStream();
}
} catch (Exception ex) {
throw new IOException("Error connecting");
}
return in;
}
private Bitmap DownloadImage(String URL) {
Bitmap bitmap = null;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
bitmap = BitmapFactory.decodeStream(in);
in.close();
} catch (IOException e1) {
Toast.makeText(this, e1.getLocalizedMessage(), Toast.LENGTH_LONG)
.show();
e1.printStackTrace();
}
return bitmap;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btnOpen = (Button) findViewById(R.id.Button01);
btnOpen.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
new BackgroundTask().execute("http://yourHost.com/1.jpg");
String str = DownloadText("http://yourHost.com/a.rss");
Toast.makeText(getBaseContext(), str, Toast.LENGTH_SHORT)
.show();
WordDefinition("Apple");
}
});
}
private String DownloadText(String URL) {
int BUFFER_SIZE = 2000;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
} catch (IOException e1) {
e1.printStackTrace();
return "";
}
InputStreamReader isr = new InputStreamReader(in);
int charRead;
String str = "";
char[] inputBuffer = new char[BUFFER_SIZE];
try {
while ((charRead = isr.read(inputBuffer)) > 0) {
String readString = String.copyValueOf(inputBuffer, 0, charRead);
str += readString;
inputBuffer = new char[BUFFER_SIZE];
}
in.close();
} catch (IOException e) {
e.printStackTrace();
return "";
}
return str;
}
private void WordDefinition(String word) {
InputStream in = null;
try {
in = OpenHttpConnection("http://services.aonaware.com/DictService/DictService.asmx/Define?word="+ word);
Document doc = null;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db;
try {
db = dbf.newDocumentBuilder();
doc = db.parse(in);
} catch (Exception e) {
e.printStackTrace();
}
doc.getDocumentElement().normalize();
// ---retrieve all the <Definition> nodes---
NodeList definitionElements = doc.getElementsByTagName("Definition");
String strDefinition = "";
for (int i = 0; i < definitionElements.getLength(); i++) {
Node itemNode = definitionElements.item(i);
if (itemNode.getNodeType() == Node.ELEMENT_NODE) {
Element definitionElement = (Element) itemNode;
NodeList wordDefinitionElements = (definitionElement)
.getElementsByTagName("WordDefinition");
strDefinition = "";
for (int j = 0; j < wordDefinitionElements.getLength(); j++) {
Element wordDefinitionElement = (Element) wordDefinitionElements
.item(j);
NodeList textNodes = ((Node) wordDefinitionElement)
.getChildNodes();
strDefinition += ((Node) textNodes.item(0))
.getNodeValue() + ". ";
}
Toast.makeText(getBaseContext(), strDefinition,
Toast.LENGTH_SHORT).show();
}
}
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ImageView
android:id="@+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
<Button
android:text="Download Content"
android:id="@+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
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