Java tutorial
/* * Copyright 2013 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 com.endiansoftware.echo.remotewatch; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GooglePlayServicesUtil; import com.google.android.gms.gcm.GoogleCloudMessaging; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.SharedPreferences; import android.content.pm.PackageInfo; import android.content.pm.PackageManager.NameNotFoundException; import android.os.AsyncTask; import android.os.Bundle; import android.os.PowerManager; import android.util.Log; import android.view.View; import android.widget.TextView; import android.content.ClipboardManager; import android.os.Handler; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.ArrayList; import java.util.List; import java.util.concurrent.atomic.AtomicInteger; import android.content.ClipData; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; /** * Main UI for the demo app. */ public class MainActivity extends Activity implements HTTPCallbackListener { public static boolean isActivityVisible() { return activityVisible; } public static void activityResumed() { activityVisible = true; } public static void activityPaused() { activityVisible = false; } private static boolean activityVisible; public static final String EXTRA_MESSAGE = "message"; public static final String PROPERTY_REG_ID = "registration_id"; private static final String PROPERTY_APP_VERSION = "appVersion"; private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000; private AutoUpdater updater = new AutoUpdater(this); /** * Substitute you own sender ID here. This is the project number you got * from the API Console, as described in "Getting Started." */ String SENDER_ID = "991997460989"; /** * Tag used on log messages. */ static final String TAG = "GCM Demo"; TextView mDisplay; GoogleCloudMessaging gcm; AtomicInteger msgId = new AtomicInteger(); Context context; String regid; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mDisplay = (TextView) findViewById(R.id.display); context = getApplicationContext(); // Check device for Play Services APK. If check succeeds, proceed with GCM registration. if (checkPlayServices()) { gcm = GoogleCloudMessaging.getInstance(this); regid = getRegistrationId(context); ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE); ClipData clip = ClipData.newPlainText("label", regid); clipboard.setPrimaryClip(clip); if (regid.isEmpty()) { registerInBackground(); } } else { Log.i(TAG, "No valid Google Play Services APK found."); } } @Override protected void onResume() { super.onResume(); activityResumed(); // Check device for Play Services APK. checkPlayServices(); if (regid.isEmpty() == false) { new HTTPGetRequestTask().execute("http://54.64.213.182:3000?regid=" + regid); } updater.sendEmptyMessage(AutoUpdater.TIMER_ON); } @Override protected void onPause() { super.onPause(); activityPaused(); updater.sendEmptyMessage(AutoUpdater.TIMER_OFF); } /** * Check the device to make sure it has the Google Play Services APK. If * it doesn't, display a dialog that allows users to download the APK from * the Google Play Store or enable it in the device's system settings. */ private boolean checkPlayServices() { int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this); if (resultCode != ConnectionResult.SUCCESS) { if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) { GooglePlayServicesUtil.getErrorDialog(resultCode, this, PLAY_SERVICES_RESOLUTION_REQUEST).show(); } else { Log.i(TAG, "This device is not supported."); finish(); } return false; } return true; } /** * Stores the registration ID and the app versionCode in the application's * {@code SharedPreferences}. * * @param context application's context. * @param regId registration ID */ private void storeRegistrationId(Context context, String regId) { final SharedPreferences prefs = getGcmPreferences(context); int appVersion = getAppVersion(context); Log.i(TAG, "Saving regId on app version " + appVersion); SharedPreferences.Editor editor = prefs.edit(); editor.putString(PROPERTY_REG_ID, regId); editor.putInt(PROPERTY_APP_VERSION, appVersion); editor.commit(); } /** * Gets the current registration ID for application on GCM service, if there is one. * <p> * If result is empty, the app needs to register. * * @return registration ID, or empty string if there is no existing * registration ID. */ private String getRegistrationId(Context context) { final SharedPreferences prefs = getGcmPreferences(context); String registrationId = prefs.getString(PROPERTY_REG_ID, ""); if (registrationId.isEmpty()) { Log.i(TAG, "Registration not found."); return ""; } // Check if app was updated; if so, it must clear the registration ID // since the existing regID is not guaranteed to work with the new // app version. int registeredVersion = prefs.getInt(PROPERTY_APP_VERSION, Integer.MIN_VALUE); int currentVersion = getAppVersion(context); if (registeredVersion != currentVersion) { Log.i(TAG, "App version changed."); return ""; } return registrationId; } /** * Registers the application with GCM servers asynchronously. * <p> * Stores the registration ID and the app versionCode in the application's * shared preferences. */ private void registerInBackground() { new AsyncTask<Void, Void, String>() { @Override protected String doInBackground(Void... params) { String msg = ""; try { if (gcm == null) { gcm = GoogleCloudMessaging.getInstance(context); } regid = gcm.register(SENDER_ID); msg = "Device registered, registration ID=" + regid; // You should send the registration ID to your server over HTTP, so it // can use GCM/HTTP or CCS to send messages to your app. sendRegistrationIdToBackend(); // For this demo: we don't need to send it because the device will send // upstream messages to a server that echo back the message using the // 'from' address in the message. // Persist the regID - no need to register again. storeRegistrationId(context, regid); } catch (IOException ex) { msg = "Error :" + ex.getMessage(); // If there is an error, don't just keep trying to register. // Require the user to click a button again, or perform // exponential back-off. } return msg; } @Override protected void onPostExecute(String msg) { new HTTPGetRequestTask().execute("http://54.64.213.182:3000?regid=" + msg); } }.execute(null, null, null); } @Override protected void onDestroy() { super.onDestroy(); updater.sendEmptyMessage(AutoUpdater.TIMER_DESTROY); } /** * @return Application's version code from the {@code PackageManager}. */ private static int getAppVersion(Context context) { try { PackageInfo packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0); return packageInfo.versionCode; } catch (NameNotFoundException e) { // should never happen throw new RuntimeException("Could not get package name: " + e); } } /** * @return Application's {@code SharedPreferences}. */ private SharedPreferences getGcmPreferences(Context context) { // This sample app persists the registration ID in shared preferences, but // how you store the regID in your app is up to you. return getSharedPreferences(MainActivity.class.getSimpleName(), Context.MODE_PRIVATE); } /** * 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. */ private void sendRegistrationIdToBackend() { // Your implementation here. } private void update() { new HTTPGetRequestTask(this).execute("http://54.64.213.182:3000/"); } public void callback(String response) { StringBuffer sb = new StringBuffer(); try { // "kkt_list" ? JSON ? JSONArray Array = new JSONArray(response); for (int i = 0; i < Array.length(); i++) { // bodylist ? JSON ? JSON ? ? JSONObject insideObject = Array.getJSONObject(i); sb.append(insideObject.getString("m_Key")).append(" : ").append(insideObject.getString("m_Value")) .append("\n"); } } catch (JSONException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } mDisplay.setText(sb.toString()); } }