DefaultConnectivityMonitorFactory.java

package com.bumptech.glide.manager;

import android.content.Context;
import android.content.pm.PackageManager;
import android.support.annotation.NonNull;

/**
 * A factory class that produces a functional {@link com.bumptech.glide.manager.ConnectivityMonitor}
 * if the application has the {@code android.permission.ACCESS_NETWORK_STATE} permission and a no-op
 * non functional {@link com.bumptech.glide.manager.ConnectivityMonitor} if the app does not have
 * the required permission.
 */
public class DefaultConnectivityMonitorFactory implements ConnectivityMonitorFactory {

  @NonNull
  public ConnectivityMonitor build(
      @NonNull Context context,
      @NonNull ConnectivityMonitor.ConnectivityListener listener) {
    final int res = context.checkCallingOrSelfPermission("android.permission.ACCESS_NETWORK_STATE");
    final boolean hasPermission = res == PackageManager.PERMISSION_GRANTED;
    if (hasPermission) {
      return new DefaultConnectivityMonitor(context, listener);
    } else {
      return new NullConnectivityMonitor();
    }
  }
}