Java tutorial
/* * Copyright 2013 serso aka se.solovyev * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * Contact details * * Email: se.solovyev@gmail.com * Site: http://se.solovyev.org */ package org.solovyev.android.samples.http; import android.app.Activity; import android.app.ListActivity; import android.os.Bundle; import android.os.Handler; import android.view.View; import android.widget.Button; import android.widget.Toast; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.util.EntityUtils; import org.solovyev.android.Threads; import org.solovyev.android.async.CommonAsyncTask; import org.solovyev.android.http.*; import org.solovyev.android.list.ListItemAdapter; import org.solovyev.android.samples.R; import javax.annotation.Nonnull; import javax.annotation.Nullable; import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.List; public class SamplesHttpActivity extends ListActivity { @Nonnull private ImageLoader imageLoader; @Nonnull private static final String fetchDataUri = "http://se.solovyev.org/other/acl/data.txt"; @Nonnull private static final String uriPrefix = "http://se.solovyev.org/other/acl/icons/"; private static final List<String> imageNames = new ArrayList<String>(); static { imageNames.add("Android-Action-complete.png"); imageNames.add("Android-Adobe-Photoshop.png"); imageNames.add("Android-Amazon-MP3.png"); imageNames.add("Android-Barcode-Reader.png"); imageNames.add("Android-Bluetooth.png"); imageNames.add("Android-Browser.png"); imageNames.add("Android-Buzz.png"); imageNames.add("Android-Calculator.png"); imageNames.add("Android-Calender.png"); imageNames.add("Android-Camera.png"); imageNames.add("Android-Car-Home.png"); imageNames.add("Android-Clock.png"); imageNames.add("Android-Contacts.png"); imageNames.add("Android-Email.png"); imageNames.add("Android-Evernote.png"); imageNames.add("Android-Facebook.png"); imageNames.add("Android-Flickr.png"); imageNames.add("Android-Gallery.png"); imageNames.add("Android-Gmail.png"); imageNames.add("Android-Goggles.png"); imageNames.add("Android-Gtalk.png"); imageNames.add("Android-Layar.png"); imageNames.add("Android-Maps.png"); imageNames.add("Android-Market.png"); imageNames.add("Android-Messages.png"); imageNames.add("Android-mPhotoshop-CS4.png"); imageNames.add("Android-Music.png"); imageNames.add("Android-News.png"); imageNames.add("Android-NewsWeather.png"); imageNames.add("Android-Opera-Mini.png"); imageNames.add("Android-Opera-Mini-Android.png"); imageNames.add("Android-Phone.png"); imageNames.add("Android-QR-Code.png"); imageNames.add("Android-Recorder.png"); imageNames.add("Android-Recorder-detailed.png"); imageNames.add("Android-RSS.png"); imageNames.add("Android-Settings.png"); imageNames.add("Android-Shazam.png"); imageNames.add("Android-Skype.png"); imageNames.add("Android-Tag-reader.png"); imageNames.add("Android-Twitter.png"); imageNames.add("Android-Twitter-2.png"); imageNames.add("Android-Voice.png"); imageNames.add("Android-Voice-Dailer.png"); imageNames.add("Android-Voice-Search.png"); imageNames.add("Android-Weather.png"); imageNames.add("Android-Wi-Fi.png"); imageNames.add("Android-Wikitude.png"); imageNames.add("Android-Youtube.png"); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.acl_http_layout); // should be one instance in application if several threads are working with it this.imageLoader = new CachingImageLoader(this, "acl-samples", new Handler()); final List<HttpListItem> listItems = new ArrayList<HttpListItem>(); for (String imageName : imageNames) { listItems.add(new HttpListItem(uriPrefix + imageName, this.imageLoader)); } ListItemAdapter.createAndAttach(this, listItems); final Button fetchDataButton = (Button) findViewById(R.id.fetch_data_button); fetchDataButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { new CommonAsyncTask<String, Void, String>(SamplesHttpActivity.this) { @Override protected String doWork(@Nonnull List<String> strings) { assert strings.size() == 1; try { return HttpTransactions.execute(new FetchHttpData(strings.get(0))); } catch (IOException e) { throwException(e); } return ""; } @Override protected void onSuccessPostExecute(@Nullable final String result) { final Activity activity = (Activity) getContext(); Threads.tryRunOnUiThread(activity, new Runnable() { @Override public void run() { Toast.makeText(activity, getString(R.string.acl_http_response) + " " + result, Toast.LENGTH_SHORT).show(); } }); } @Override protected void onFailurePostExecute(@Nonnull final Exception e) { final Activity activity = (Activity) getContext(); Threads.tryRunOnUiThread(activity, new Runnable() { @Override public void run() { Toast.makeText(getContext(), e.getMessage(), Toast.LENGTH_SHORT).show(); } }); } }.execute(fetchDataUri); } }); } private static class FetchHttpData extends AbstractHttpTransaction<String> { private FetchHttpData(@Nonnull String uri) { super(uri, HttpMethod.GET); } @Override public String getResponse(@Nonnull HttpResponse response) { try { return EntityUtils.toString(response.getEntity()); } catch (IOException e) { throw new HttpRuntimeIoException(e); } } @Nonnull @Override public List<NameValuePair> getRequestParameters() { return Collections.emptyList(); } } }