GCM

MainActivity.java

package com.hungdh.gcmdemo;

public class MainActivity extends AppCompatActivity {

    private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
    private static final String TAG = "MainActivity";

    private BroadcastReceiver mRegistrationBroadcastReceiver;
    private ProgressBar mRegistrationProgressBar;
    private TextView mInformationTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mRegistrationProgressBar = (ProgressBar) findViewById(R.id.registrationProgressBar);
        mRegistrationBroadcastReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                mRegistrationProgressBar.setVisibility(ProgressBar.GONE);
                SharedPreferences sharedPreferences =
                        PreferenceManager.getDefaultSharedPreferences(context);
                boolean sentToken = sharedPreferences
                        .getBoolean(QuickstartPreferences.SENT_TOKEN_TO_SERVER, false);

                if (sentToken) {
                    mInformationTextView.setText(getString(R.string.gcm_send_message));
                } else {
                    mInformationTextView.setText(getString(R.string.token_error_message));
                }
            }
        };
        mInformationTextView = (TextView) findViewById(R.id.informationTextView);


        if (checkPlayServices() ) {
            // Start IntentService to register this application with GCM.
            Intent intent = new Intent(this, RegistrationIntentService.class);
            Bundle bundle = new Bundle();
            bundle.putString(NAME, "Huy Hung");
            bundle.putString(EMAIL, "hungdh0x5e@gmail.com");
            intent.putExtra("bundle", bundle);
            startService(intent);
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
                new IntentFilter(QuickstartPreferences.REGISTRATION_COMPLETE));
    }

    @Override
    protected void onPause() {
        LocalBroadcastManager.getInstance(this).unregisterReceiver(mRegistrationBroadcastReceiver);
        super.onPause();
    }

    /**
     * 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() {
        GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
        int resultCode = apiAvailability.isGooglePlayServicesAvailable(this);
        if (resultCode != ConnectionResult.SUCCESS) {
            if (apiAvailability.isUserResolvableError(resultCode)) {
                apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST)
                        .show();
            } else {
                Log.i(TAG, "This device is not supported.");
                finish();
            }
            return false;
        }
        return true;
    }

}