Android Open Source - GCM-Android-App Main Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.pixelart.gcm;
/*from w ww  .  ja  va 2s .c o  m*/
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.content.Context;
import android.content.SharedPreferences;
import java.util.concurrent.atomic.AtomicInteger;
import android.util.Log;
import com.google.android.gms.gcm.GoogleCloudMessaging;
import android.content.pm.PackageInfo;
import android.os.AsyncTask;
import android.content.pm.PackageManager;
import java.io.IOException;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.HttpResponse;
import org.apache.http.util.EntityUtils;
import org.apache.http.client.ClientProtocolException;
import android.app.AlertDialog;
import android.content.DialogInterface;

/**
*@author PixelartDev - http://pixelartdev.com
* 
* Copyright 2014 GPUv3
*/
public class MainActivity extends Activity {
  
  
    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 final static int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;

    String SENDER_ID = "your ID";
  String URL = "http://px.hj.cx";
    TextView mDisplay;
    GoogleCloudMessaging gcm;
    AtomicInteger msgId = new AtomicInteger();
    SharedPreferences prefs;
    Context context;
    String regid;
  String responseBody;
  String condition = "0";
  String ms;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mDisplay = (TextView) findViewById(R.id.display);
    
    condition = getIntent().getStringExtra("alert");
    if(condition != null){
      ms = getIntent().getStringExtra("msg");
      alert();
    }else{}
    
        context = getApplicationContext();

        if (checkPlayServices()) {
            gcm = GoogleCloudMessaging.getInstance(this);
            regid = getRegistrationId(context);
            if (regid.isEmpty()) {
                new registerInBackground().execute();
            }
        } else {
            Log.i("Px GCM", "No valid Google Play Services APK found.");
        }
    }
  
  private void alert() {
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
    alertDialogBuilder.setTitle("GCM Message");
    alertDialogBuilder
      .setMessage(ms)
      .setCancelable(false)
      .setPositiveButton("OK",new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog,int id) {
          dialog.cancel();
        }});
    AlertDialog alertDialog = alertDialogBuilder.create();
    alertDialog.show();
  }
  
  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("Px GCM", "This device is not supported.");
        finish();
      }
      return false;
    }
    return true;
  }
  
  private String getRegistrationId(Context context) {
    final SharedPreferences prefs = getGCMPreferences(context);
    String registrationId = prefs.getString(PROPERTY_REG_ID, "");
    if (registrationId.isEmpty()) {
      Log.i("Px GCM", "Registration not found.");
      return "";
    }
  
    int registeredVersion = prefs.getInt(PROPERTY_APP_VERSION, Integer.MIN_VALUE);
    int currentVersion = getAppVersion(context);
    if (registeredVersion != currentVersion) {
      Log.i("Px GCM", "App version changed.");
      return "";
    }
    return registrationId;
  }
  
  private SharedPreferences getGCMPreferences(Context context) {
    return getSharedPreferences(MainActivity.class.getSimpleName(),
                  Context.MODE_PRIVATE);
  }
  
  private static int getAppVersion(Context context) {
    try {
      PackageInfo packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
      return packageInfo.versionCode;
    } catch (PackageManager.NameNotFoundException e) {
      throw new RuntimeException("Could not get package name: " + e);
    }
  }
  
  private class registerInBackground extends AsyncTask<Void, Integer, 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 \n registration ID=" + regid;
                sendRegistrationIdToBackend();
        
                storeRegistrationId(context, regid);
            } catch (IOException ex) {
                msg = "Error :" + ex.getMessage();
            }
            return msg;
        }

        @Override
        protected void onPostExecute(String msg) {
            mDisplay.append(msg + "\n");
        }
  }
  
  private void sendRegistrationIdToBackend() {
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost(URL+"/?regId="+regid);
    try {
      HttpResponse response = httpclient.execute(httppost);  
      responseBody = EntityUtils.toString(response.getEntity());

    } catch (ClientProtocolException e) {
    } catch (IOException e) {
    }
  }
  
  private void storeRegistrationId(Context context, String regId) {
    final SharedPreferences prefs = getGCMPreferences(context);
    int appVersion = getAppVersion(context);
    Log.i("Px GCM", "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();
  }
}

Java Source Code List

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