Android Open Source - banshee-remote Network State Broadcast

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From Project

Back to project page banshee-remote.

License

The source code is released under:

GNU General Public License

Java Source Code

package de.viktorreiser.toolbox.content;
/*w w  w . jav  a  2 s  . c o m*/
import android.app.Application;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.State;
import android.net.wifi.WifiManager;

/**
 * Network state information (<b>Beta +</b>).<br>
 * <br>
 * This class simplifies handling with connect information of WiFi and mobile network and broadcasts
 * a {@link #NETWORK_STATE_ACTION} on change of state. Use static methods to get information about
 * change.<br>
 * <br>
 * <b>Setup in manifest file</b>:
 * 
 * <pre>
 * {@code <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
 * <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 * 
 * <receiver android:name="de.viktorreiser.toolbox.content.WifiStateBroadcast">
 *   <intent-filter>
 *     <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
 *     <action android:name="android.net.wifi.supplicant.CONNECTION_CHANGE" />
 *   </intent-filter>
 * </receiver>
 * }
 * </pre>
 * 
 * <i>Depends on</i>: {@link L}
 * 
 * @author Viktor Reiser &lt;<a href="mailto:viktorreiser@gmx.de">viktorreiser@gmx.de</a>&gt;
 */
public class NetworkStateBroadcast extends BroadcastReceiver {
  
  // PUBLIC CONSTANT ============================================================================
  
  /** Action broadcasted if network state changes. */
  public static final String NETWORK_STATE_ACTION = NetworkStateBroadcast.class.getName()
      + ".ACTION_NETWORK_STATE";
  
  // PRIVATE ====================================================================================
  
  /** {@code true} if WiFi is connected. */
  private static boolean mWifiConnected = false;
  
  /** {@code true} if mobile network is connected. */
  private static boolean mMobileConnected = false;
  
  // PUBLIC =====================================================================================
  
  /**
   * Is WiFi connected?<br>
   * <br>
   * {@code false} until first change noticed or {@link #initialCheck(Context)} is called.<br>
   * <br>
   * <b>Note</b>: Remember that a connection with WiFi does not guarantee Internet access.
   * 
   * @return {@code true} if WiFi is connected
   */
  public static boolean isWifiConnected() {
    return mWifiConnected;
  }
  
  /**
   * Is mobile network connected?<br>
   * <br>
   * {@code false} until first change noticed or {@link #initialCheck(Context)} is called.
   * 
   * @return {@code true} if mobile network is connected
   */
  public static boolean isMobileConnected() {
    return mMobileConnected;
  }
  
  /**
   * Is mobile network or WiFi connected?<br>
   * <br>
   * {@code false} until first change noticed or {@link #initialCheck(Context)} is called.<br>
   * <br>
   * <b>Note</b>: Remember that a connection to WiFi does not guarantee Internet access.
   * 
   * @return {@code true} if mobile network or WiFi is connected
   */
  public static boolean isConnected() {
    return mMobileConnected || mWifiConnected;
  }
  
  /**
   * Perform initial connection check on application startup.<br>
   * <br>
   * This check <b>won't</b> send a broadcast message.<br>
   * <br>
   * A good place to call this method is in a custom {@link Application#onCreate()}.
   * 
   * @param context
   */
  public static void initialCheck(Context context) {
    ConnectivityManager connectivityManager = (ConnectivityManager) context
        .getSystemService(Context.CONNECTIVITY_SERVICE);
    
    mWifiConnected = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
        .getState() == State.CONNECTED;
    
    mMobileConnected = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
        .getState() == State.CONNECTED;
  }
  
  // OVERRIDDEN =================================================================================
  
  /**
   * <i>Overridden for internal use!</i>
   */
  @Override
  public void onReceive(Context context, Intent intent) {
    boolean changed = false;
    
    if (intent.getAction().equals(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION)) {
      if (!intent.getBooleanExtra(WifiManager.EXTRA_SUPPLICANT_CONNECTED, true)) {
        if (mWifiConnected) {
          mWifiConnected = false;
          changed = true;
        }
      }
    } else if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
      ConnectivityManager cm = (ConnectivityManager) context.getSystemService(
          Context.CONNECTIVITY_SERVICE);
      
      NetworkInfo netInfo = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
      
      if (netInfo.getState() == NetworkInfo.State.CONNECTED) {
        if (!mMobileConnected) {
          mMobileConnected = true;
          changed = true;
        }
      } else if (netInfo.getState() == NetworkInfo.State.DISCONNECTING
          || netInfo.getState() == NetworkInfo.State.DISCONNECTED) {
        if (mMobileConnected) {
          mMobileConnected = false;
          changed = true;
        }
      }
      
      netInfo = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
      
      if (netInfo.getState() == NetworkInfo.State.CONNECTED) {
        if (!mWifiConnected) {
          mWifiConnected = true;
          changed = true;
        }
      } else if (netInfo.getState() == NetworkInfo.State.DISCONNECTING
          || netInfo.getState() == NetworkInfo.State.DISCONNECTED) {
        if (mWifiConnected) {
          mWifiConnected = false;
          changed = true;
        }
      }
    }
    
    if (changed) {
      context.sendBroadcast(new Intent(NETWORK_STATE_ACTION));
    }
  }
}

Java Source Code List

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