Java tutorial
/* * Copyright 2012 Google Inc. * * 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 jog.my.memory.gcm; import android.content.Context; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.RecoverySystem; import android.provider.MediaStore; import android.util.Base64; import android.util.Config; import android.util.Log; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.InputStreamEntity; import org.apache.http.entity.mime.HttpMultipartMode; import org.apache.http.entity.mime.MultipartEntityBuilder; import org.apache.http.entity.mime.content.ByteArrayBody; import org.apache.http.entity.mime.content.FileBody; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.util.EntityUtils; import java.io.BufferedReader; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; import java.util.Random; import jog.my.memory.R; import jog.my.memory.database.MyLatLng; import jog.my.memory.database.Picture; /** * Helper class used to communicate with the AppEngine server. */ public final class ServerUtilities { private static final int MAX_ATTEMPTS = 5; private static final int BACKOFF_MILLI_SECONDS = 2000; private static final Random random = new Random(); private static final String TAG = "ServerUtilities"; /** * Sends the registration ID to your server over HTTP, so it can use * GCM/HTTP or CCS to send messages to your app. Not needed for this demo * since the device sends upstream messages to a server that echoes back the * message using the 'from' address in the message. */ public static void sendRegistrationIdToBackend(Context context, String regId) { String serverUrl = context.getString(R.string.server_addr) + "/register"; Map<String, String> params = new HashMap<String, String>(); params.put("regId", regId); // Once GCM returns a registration id, we need to register it in the // server. As the server might be down, we will retry it a couple // times. long backoff = BACKOFF_MILLI_SECONDS + random.nextInt(1000); for (int i = 1; i <= ServerUtilities.MAX_ATTEMPTS; i++) { try { ServerUtilities.post(serverUrl, params); } catch (IOException e) { // Here we are simplifying and retrying on any error; in a real // application, it should retry only on unrecoverable errors // (like HTTP error code 503). if (i == MAX_ATTEMPTS) { break; } try { Thread.sleep(backoff); } catch (InterruptedException e1) { // Activity finished before we complete - exit. Thread.currentThread().interrupt(); } // increase backoff exponentially backoff *= 2; } } } /** * Issue a POST request to the server. * * @param endpoint * POST address. * @param params * request parameters. * * @throws java.io.IOException * propagated from POST. */ public static String post(String endpoint, Map<String, String> params) throws IOException { URL url; try { url = new URL(endpoint); } catch (MalformedURLException e) { throw new IllegalArgumentException("invalid url: " + endpoint); } StringBuilder bodyBuilder = new StringBuilder(); Iterator<Entry<String, String>> iterator = params.entrySet().iterator(); // constructs the POST body using the parameters while (iterator.hasNext()) { Entry<String, String> param = iterator.next(); bodyBuilder.append(param.getKey()).append('=').append(param.getValue()); if (iterator.hasNext()) { bodyBuilder.append('&'); } } String body = bodyBuilder.toString(); byte[] bytes = body.getBytes(); HttpURLConnection conn = null; try { conn = (HttpURLConnection) url.openConnection(); conn.setDoOutput(true); conn.setUseCaches(false); conn.setFixedLengthStreamingMode(bytes.length); conn.setRequestMethod("POST"); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8"); // post the request OutputStream out = conn.getOutputStream(); out.write(bytes); out.close(); // handle the response int status = conn.getResponseCode(); if (status != 200) { throw new IOException("Post failed with error code " + status); } // Get Response InputStream is = conn.getInputStream(); BufferedReader rd = new BufferedReader(new InputStreamReader(is)); String line; StringBuffer response = new StringBuffer(); while ((line = rd.readLine()) != null) { response.append(line); response.append('\n'); } rd.close(); return response.toString(); } finally { if (conn != null) { conn.disconnect(); } } } /** * Gets the real path of the URI returned from the camera * @param contentUri - apparent URI of resource * @return - actual URI of resource */ public static String getRealPathFromURI(Uri contentUri, Context context) { String[] proj = new String[] { MediaStore.Images.ImageColumns.DATA }; Cursor cursor = context.getContentResolver().query(contentUri, proj, null, null, null); int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); cursor.moveToFirst(); String filename = cursor.getString(column_index); cursor.close(); return filename; } /** * Uploads a file to the server. * @param context - Context of the app where the file is * @param serverUrl - URL of the server * @param uri - URI of the file * @return - response of posting the file to server */ public static String postFile(Context context, String serverUrl, Uri uri) { //TODO: Get the location sent up in here too! HttpClient client = new DefaultHttpClient(); HttpPost post = new HttpPost(serverUrl + "/upload"); MultipartEntityBuilder builder = MultipartEntityBuilder.create(); builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE); // //Create the FileBody // final File file = new File(uri.getPath()); // FileBody fb = new FileBody(file); // deal with the file ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); Bitmap bitmap = BitmapFactory.decodeFile(getRealPathFromURI(uri, context)); bitmap.compress(Bitmap.CompressFormat.JPEG, 75, byteArrayOutputStream); byte[] byteData = byteArrayOutputStream.toByteArray(); //String strData = Base64.encodeToString(data, Base64.DEFAULT); // I have no idea why Im doing this ByteArrayBody byteArrayBody = new ByteArrayBody(byteData, "image"); // second parameter is the name of the image (//TODO HOW DO I MAKE IT USE THE IMAGE FILENAME?) builder.addPart("myFile", byteArrayBody); builder.addTextBody("foo", "test text"); HttpEntity entity = builder.build(); post.setEntity(entity); try { HttpResponse response = client.execute(post); Log.d(TAG, "The response code was: " + response.getStatusLine().getStatusCode()); } catch (Exception e) { Log.d(TAG, "The image was not successfully uploaded."); } return null; // HttpClient httpclient = new DefaultHttpClient(); // HttpPost httppost = new HttpPost(serverUrl+"/postFile.do"); // // InputStream stream = null; // try { // stream = context.getContentResolver().openInputStream(uri); // // InputStreamEntity reqEntity = new InputStreamEntity(stream, -1); // // httppost.setEntity(reqEntity); // // HttpResponse response = httpclient.execute(httppost); // Log.d(TAG,"The response code was: "+response.getStatusLine().getStatusCode()); // if (response.getStatusLine().getStatusCode() == 200) { // // file uploaded successfully! // } else { // throw new RuntimeException("server couldn't handle request"); // } // return response.toString(); // } catch (Exception e) { // e.printStackTrace(); // // // handle error // } finally { // try { // stream.close(); // }catch(IOException ioe){ // ioe.printStackTrace(); // } // } // return null; } /** * Return a string representation of the arraylist * @param amll arraylist of MyLatLng objects * @return String representation */ public static String parseLocationString(ArrayList<MyLatLng> amll) { String locationString = ""; Log.d(TAG, "amll:size: " + amll.size()); for (int i = 0; i < amll.size(); i++) { locationString = locationString + "(" + amll.get(i).getLatitude() + ", " + amll.get(i).getLongitude() + ")"; if (i < amll.size() - 1 && locationString.length() < 495) { locationString += ", "; if (locationString.length() > 468) { return locationString; } } } return locationString; } /** * Convert images to the string representation * @param pics - pictures to send * @return arraylist of string representation of pictures */ public static ArrayList<String> convertPhotosToStringRepresentation(ArrayList<Picture> pics) { ArrayList<String> listPhotos = new ArrayList<>(); for (int i = 0; i < pics.size(); i++) { // String stringEncodedImage = // Base64.encodeToString(pics.get(i).getmImageAsByteArray(), Base64.DEFAULT); // listPhotos.add(stringEncodedImage); Bitmap bitmap = pics.get(i).getmImage(); ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream); byte[] bitmapByte = outputStream.toByteArray(); listPhotos.add(Base64.encodeToString(bitmapByte, Base64.DEFAULT)); // try { // listPhotos.add(new String(bitmapByte)); // } // catch(Exception e){ // Log.d(TAG,"The encoding didn't work"); // } } return listPhotos; } /** * Convert images to the string representation * @param pics - pictures to send * @return arraylist of string representation of pictures */ public static byte[] convertPhotosToByteRepresentation(ArrayList<Picture> pics) { ArrayList<byte[]> listPhotos = new ArrayList<>(); for (int i = 0; i < pics.size(); i++) { String stringEncodedImage = Base64.encodeToString(pics.get(i).getmImageAsByteArray(), Base64.DEFAULT); listPhotos.add(pics.get(i).getmImageAsByteArray()); } return listPhotos.get(0); } public static Bitmap convertStringRepToPhoto(String s) { byte[] b = Base64.decode(s, Base64.DEFAULT); ByteArrayInputStream bis = new ByteArrayInputStream(b); Bitmap bmp = BitmapFactory.decodeStream(bis); return bmp; } }