import com.google.ipc.invalidation.external.client.contrib.AndroidListener; //导入依赖的package包/类
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
  Log.i(TAG, "[onCreate] Creating main activity");
  super.onCreate(savedInstanceState);

  MultiplexingGcmListener.initializeGcm(this);

  // Create and start a notification client. When the client is available, or if there is an
  // existing client, AndroidListener.reissueRegistrations() is called.
  Context context = getApplicationContext();
  Intent startIntent = AndroidListener.createStartIntent(context, CLIENT_TYPE, CLIENT_NAME);
  context.startService(startIntent);

  // Setup UI.
  info = new TextView(this);
  setContentView(info);

  // Remember the current activity since the TICL service in this example communicates via
  // static state.
  State.currentActivity = this;
  Log.i(TAG, "[onCreate] Calling refresh data from main activity");
  refreshData();
}
 

import com.google.ipc.invalidation.external.client.contrib.AndroidListener; //导入依赖的package包/类
/**
 * Starts a new client, destroying any existing client. {@code owningAccount} is the account
 * of the user for which the client is being created; it will be persisted using
 * {@link InvalidationPreferences#setAccount}.
 */
private void startClient() {
    byte[] clientName = InvalidationClientNameProvider.get().getInvalidatorClientName();
    Intent startIntent = AndroidListener.createStartIntent(this, CLIENT_TYPE, clientName);
    startServiceIfPossible(startIntent);
    setIsClientStarted(true);
}
 

import com.google.ipc.invalidation.external.client.contrib.AndroidListener; //导入依赖的package包/类
/** Stops the notification client. */
private void stopClient() {
    startServiceIfPossible(AndroidListener.createStopIntent(this));
    setIsClientStarted(false);
    setClientId(null);
}
 

import com.google.ipc.invalidation.external.client.contrib.AndroidListener; //导入依赖的package包/类
/**
 * Starts a new client, destroying any existing client. {@code owningAccount} is the account
 * of the user for which the client is being created; it will be persisted using
 * {@link InvalidationPreferences#setAccount}.
 */
private void startClient() {
    Intent startIntent = AndroidListener.createStartIntent(this, CLIENT_TYPE, getClientName());
    startService(startIntent);
    setIsClientStarted(true);
}
 

import com.google.ipc.invalidation.external.client.contrib.AndroidListener; //导入依赖的package包/类
/** Stops the notification client. */
private void stopClient() {
    startService(AndroidListener.createStopIntent(this));
    setIsClientStarted(false);
    setClientId(null);
}