Android Open Source - Android-Push My Activity

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License

The source code is released under:

Apache License

Java Source Code

/*
Copyright 2014 Posten Norge AS//  ww w  .j  a va2 s . c om

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 no.digipost.android_push;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.gcm.GoogleCloudMessaging;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;


public class MyActivity extends Activity {

    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 TextView mDisplay;
    private GoogleCloudMessaging gcm;
    private Context context;
    private String registrationID;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);
        mDisplay = (TextView) findViewById(R.id.display);
        context = getApplicationContext();

        if (checkPlayServices()) {
            gcm = GoogleCloudMessaging.getInstance(this);
            registrationID = getRegistrationId(context);

            if (registrationID.isEmpty()) {
                registerInBackground();
            }
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        checkPlayServices();
    }

    private void showMessage(String message) {
        Toast.makeText(context, message, Toast.LENGTH_LONG).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 {
                showMessage("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()) {
            showMessage("Registration not found.");
            return "";
        }

        int registeredVersion = prefs.getInt(PROPERTY_APP_VERSION, Integer.MIN_VALUE);
        int currentVersion = getAppVersion(context);
        if (registeredVersion != currentVersion) {
            showMessage("App version changed.");
            return "";
        }
        return registrationId;
    }

    private void registerInBackground() {
        new AsyncTask<Void, Void, String>() {
            @Override
            protected String doInBackground(Void... params) {
                String msg = "";
                try {
                    if (gcm == null) {
                        gcm = GoogleCloudMessaging.getInstance(context);
                    }
                    registrationID = gcm.register(Constants.SENDER_ID);
                    msg = "Device registered, registration ID=" + registrationID;
                    sendRegistrationIdToBackend();
                    storeRegistrationId(context, registrationID);
                } catch (IOException ex) {
                    msg = "Error :" + ex.getMessage();
                }
                return msg;
            }

            @Override
            protected void onPostExecute(String msg) {
                mDisplay.append(msg + "\n");
                showMessage(msg);
            }
        }.execute(null, null, null);
    }

    private void sendRegistrationIdToBackend() {
        System.out.println("[" + registrationID + "]");

        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(Constants.SERVER_URL);

        try {
            // Add your data
            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
            nameValuePairs.add(new BasicNameValuePair("regid", registrationID));
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            // Execute HTTP Post Request
            HttpResponse response = httpclient.execute(httppost);
            System.out.println("Response:" + response.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void storeRegistrationId(Context context, String regId) {
        final SharedPreferences prefs = getGcmPreferences(context);
        int appVersion = getAppVersion(context);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putString(PROPERTY_REG_ID, regId);
        editor.putInt(PROPERTY_APP_VERSION, appVersion);
        editor.commit();
    }

    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 SharedPreferences getGcmPreferences(Context context) {
        return getSharedPreferences(MyActivity.class.getSimpleName(),
                Context.MODE_PRIVATE);
    }
}

Java Source Code List

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