Java tutorial
/* Copyright 2012 Travis Porter 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. */ package com.sparkhunter.activities; import java.io.BufferedInputStream; import java.io.FileNotFoundException; import java.io.FilterInputStream; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import java.util.HashMap; import java.util.Map; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.http.AndroidHttpClient; import android.os.Bundle; import android.os.Handler; import android.text.method.ScrollingMovementMethod; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import com.facebook.android.AsyncFacebookRunner.RequestListener; import com.facebook.android.FacebookError; import com.facebook.android.Util; import com.sparkhunter.main.R; import com.sparkhunter.main.R.id; import com.sparkhunter.main.R.layout; import com.sparkhunter.network.PHPTask; import com.sparkhunter.network.ServerInterface; import com.sparkhunter.res.FacebookUtils; import com.sparkhunter.res.Player; public class FbfriendsActivity extends Activity { private HashMap<String, String> mFriends; private Activity mActivity; private Handler mHandler = new Handler(); TextView mList; @Override public void onCreate(Bundle savedInstanceState) { mActivity = this; //initialize screen super.onCreate(savedInstanceState); setContentView(R.layout.friends); mList = (TextView) findViewById(R.id.friendlist); mFriends = new HashMap(); (new AddUserTask()).execute(Player.getInstance().getPlayerID()); //get friend list FacebookUtils.getFriends(new FriendListener()); } public class FriendListener implements RequestListener { @Override public void onComplete(final String response, final Object state) { try { //parse the friend data JSONObject json = Util.parseJson(response); final JSONArray jsonFriends = json.getJSONArray("data"); FbfriendsActivity.this.runOnUiThread(new Runnable() { public void run() { try { int i = 0; while (!jsonFriends.isNull(i)) { //ListView list = (ListView) findViewById(R.id.friendlist); //ImageView img = (ImageView) findViewById(R.id.imageView1); mList.setMovementMethod(new ScrollingMovementMethod()); String[] tokens = jsonFriends.getString(i).split("\""); //list.append(tokens[7]+"\n"); mFriends.put(tokens[3], tokens[7]); (new FindUserTask()).execute(tokens[3]); //if(i==1) // img.setImageBitmap(getBitmap("https://graph.facebook.com/"+ tokens[3] +"/picture")); i++; } } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (FacebookError e) { // TODO Auto-generated catch block e.printStackTrace(); } } @Override public void onIOException(IOException e, Object state) { } @Override public void onFileNotFoundException(FileNotFoundException e, Object state) { } @Override public void onMalformedURLException(MalformedURLException e, Object state) { } @Override public void onFacebookError(FacebookError e, Object state) { } } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); FacebookUtils.authorizeCallback(requestCode, resultCode, data); } public class FindUserTask extends PHPTask { @Override protected String ServerCommand(String[] args) { return ServerInterface.findUser(args[0]); } @Override protected void PostExecute() { if (mResponses.length > 0) { String temp = mFriends.get(mResponses[0]); if (temp != null) mList.append(temp); } } } private class AddUserTask extends PHPTask { protected String ServerCommand(String[] args) { return ServerInterface.addUser(args[0]); } } //copy pasted from Hackbook (Facebook's example app) //not used yet public Bitmap getBitmap(String url) { AndroidHttpClient httpclient = null; Bitmap bm = null; try { URL aURL = new URL(url); URLConnection conn = aURL.openConnection(); conn.connect(); InputStream is = conn.getInputStream(); BufferedInputStream bis = new BufferedInputStream(is); bm = BitmapFactory.decodeStream(new FlushedInputStream(is)); bis.close(); is.close(); } catch (Exception e) { e.printStackTrace(); } finally { if (httpclient != null) { httpclient.close(); } } return bm; } class FlushedInputStream extends FilterInputStream { public FlushedInputStream(InputStream inputStream) { super(inputStream); } @Override public long skip(long n) throws IOException { long totalBytesSkipped = 0L; while (totalBytesSkipped < n) { long bytesSkipped = in.skip(n - totalBytesSkipped); if (bytesSkipped == 0L) { int b = read(); if (b < 0) { break; // we reached EOF } else { bytesSkipped = 1; // we read one byte } } totalBytesSkipped += bytesSkipped; } return totalBytesSkipped; } } }