Add onMessage(id, data) to plugin API.

A solution was needed to notify the audio player to pause when a phone call comes in. The option was to add a specific onPhone() method or generalize it. Since there are other "events" that are useful to plugins, a generalized solution was used. It is also extensible without changing the plugin API again.

Any plugin can call DroidGap.onMessage() to send a message/event to all other plugins. NetworkManager was updated to send changes in connection status to plugins, so they can intelligently handle lost connections.

framework/AndroidManifest.xml

@@ -15,6 +15,7 @@
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
     <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
     <uses-permission android:name="android.permission.RECEIVE_SMS" />
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
     <uses-permission android:name="android.permission.RECORD_VIDEO"/>

framework/src/com/phonegap/AudioHandler.java

@@ -22,9 +22,11 @@ import android.content.Context;
 import android.media.AudioManager;
 import com.phonegap.api.Plugin;
 import com.phonegap.api.PluginResult;
+import java.util.ArrayList;
 import org.json.JSONArray;
 import org.json.JSONException;
 
+import com.phonegap.api.LOG;
 import java.util.HashMap;
 import java.util.Map.Entry;
 
@@ -41,13 +43,16 @@ import java.util.Map.Entry;
  */
 public class AudioHandler extends Plugin {
 
+    public static String TAG = "AudioHandler";
 	HashMap<String,AudioPlayer> players;	// Audio player object
+	ArrayList<AudioPlayer> pausedForPhone;     // Audio players that were paused when phone call came in
 	
 	/**
 	 * Constructor.
 	 */
 	public AudioHandler() {
 		this.players = new HashMap<String,AudioPlayer>();
+		this.pausedForPhone = new ArrayList<AudioPlayer>();
 	}
 
 	/**
@@ -134,6 +139,44 @@ public class AudioHandler extends Plugin {
 		}
         this.players.clear();
 	}
+	
+    /**
+     * Called when a message is sent to plugin. 
+     * 
+     * @param id            The message id
+     * @param data          The message data
+     */
+    public void onMessage(String id, Object data) {
+        
+        // If phone message
+        if (id.equals("telephone")) {
+            
+            // If phone ringing, then pause playing
+            if ("ringing".equals(data) || "offhook".equals(data)) {
+                
+                // Get all audio players and pause then
+                java.util.Set<Entry<String,AudioPlayer>> s = this.players.entrySet();
+                java.util.Iterator<Entry<String,AudioPlayer>> it = s.iterator();
+                while (it.hasNext()) {
+                    Entry<String,AudioPlayer> entry = it.next();
+                    AudioPlayer audio = entry.getValue();
+                    if (audio.getState() == AudioPlayer.MEDIA_RUNNING) {
+                        this.pausedForPhone.add(audio);
+                        audio.pausePlaying();
+                    }
+                }
+            }
+            
+            // If phone idle, then resume playing those players we paused
+            else if ("idle".equals(data)) {
+                for (int i=0; i<this.pausedForPhone.size(); i++) {
+                    AudioPlayer audio = this.pausedForPhone.get(i);
+                    audio.startPlaying(null);
+                }
+                this.pausedForPhone = new ArrayList<AudioPlayer>();
+            }
+        }
+    }
 
     //--------------------------------------------------------------------------
     // LOCAL METHODS

framework/src/com/phonegap/AudioPlayer.java

@@ -44,11 +44,11 @@ public class AudioPlayer implements OnCompletionListener, OnPreparedListener, On
     private static final String LOG_TAG = "AudioPlayer";
 
     // AudioPlayer states
-	private static int MEDIA_NONE = 0;
-	private static int MEDIA_STARTING = 1;
-	private static int MEDIA_RUNNING = 2;
-	private static int MEDIA_PAUSED = 3;
-	private static int MEDIA_STOPPED = 4;
+	public static int MEDIA_NONE = 0;
+	public static int MEDIA_STARTING = 1;
+	public static int MEDIA_RUNNING = 2;
+	public static int MEDIA_PAUSED = 3;
+	public static int MEDIA_STOPPED = 4;
 	
 	// AudioPlayer message ids
 	private static int MEDIA_STATE = 1;
@@ -429,6 +429,15 @@ public class AudioPlayer implements OnCompletionListener, OnPreparedListener, On
 		
 		this.state = state;
 	}
+	
+	/**
+	 * Get the audio state.
+	 * 
+	 * @return int
+	 */
+	public int getState() {
+	    return this.state;
+	}
 
 	/**
 	 * Set the volume for audio player

framework/src/com/phonegap/Device.java

@@ -22,17 +22,27 @@ import java.util.TimeZone;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
+import com.phonegap.api.LOG;
 import com.phonegap.api.PhonegapActivity;
 import com.phonegap.api.Plugin;
 import com.phonegap.api.PluginResult;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
 import android.provider.Settings;
+import android.telephony.TelephonyManager;
 
 public class Device extends Plugin {
-	
+    public static final String TAG = "Device";
+
     public static String phonegapVersion = "1.2.0";             // PhoneGap version
 	public static String platform = "Android";					// Device OS
 	public static String uuid;									// Device UUID
     
+    BroadcastReceiver telephonyReceiver = null;
+
     /**
      * Constructor.
      */
@@ -48,6 +58,7 @@ public class Device extends Plugin {
 	public void setContext(PhonegapActivity ctx) {
 		super.setContext(ctx);
         Device.uuid = getUuid();
+        this.initTelephonyReceiver();
 	}
 
 	/**
@@ -93,11 +104,57 @@ public class Device extends Plugin {
 		}
 		return false;
 	}
+    
+    /**
+     * Unregister receiver.
+     */
+    public void onDestroy() {
+        this.ctx.unregisterReceiver(this.telephonyReceiver);
+    }
 
     //--------------------------------------------------------------------------
     // LOCAL METHODS
     //--------------------------------------------------------------------------
-		
+    
+    /**
+     * Listen for telephony events: RINGING, OFFHOOK and IDLE
+     * Send these events to all plugins using
+     *      DroidGap.onMessage("telephone", "ringing" | "offhook" | "idle")
+     */
+    private void initTelephonyReceiver() {
+        IntentFilter intentFilter = new IntentFilter() ;
+        intentFilter.addAction(TelephonyManager.ACTION_PHONE_STATE_CHANGED);
+        final PhonegapActivity myctx = this.ctx;
+        this.telephonyReceiver = new BroadcastReceiver() {
+            
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                
+                // If state has changed
+                if ((intent != null) && intent.getAction().equals(TelephonyManager.ACTION_PHONE_STATE_CHANGED)) {
+                    if (intent.hasExtra(TelephonyManager.EXTRA_STATE)) {
+                        String extraData = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
+                        if (extraData.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
+                            LOG.i(TAG, "Telephone RINGING");
+                            myctx.onMessage("telephone", "ringing");
+                        }
+                        else if (extraData.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)) {
+                            LOG.i(TAG, "Telephone OFFHOOK");
+                            myctx.onMessage("telephone", "offhook");
+                        }
+                        else if (extraData.equals(TelephonyManager.EXTRA_STATE_IDLE)) {
+                            LOG.i(TAG, "Telephone IDLE");
+                            myctx.onMessage("telephone", "idle");
+                        }
+                    }
+                }
+            }
+        };
+        
+        // Register the receiver
+        this.ctx.registerReceiver(this.telephonyReceiver, intentFilter);
+    }
+
 	/**
 	 * Get the OS name.
 	 * 

framework/src/com/phonegap/DroidGap.java

@@ -814,6 +814,18 @@ public class DroidGap extends PhonegapActivity {
         }
     }
 
+    /**
+     * Send a message to all plugins. 
+     * 
+     * @param id            The message id
+     * @param data          The message data
+     */
+    public void onMessage(String id, Object data) {
+        
+        // Forward to plugins
+        this.pluginManager.onMessage(id, data);
+    }
+
     /**
      * Add a class that implements a service.
      * 

framework/src/com/phonegap/NetworkManager.java

@@ -199,6 +199,9 @@ public class NetworkManager extends Plugin {
         PluginResult result = new PluginResult(PluginResult.Status.OK, type);
         result.setKeepCallback(true);
         this.success(result, this.connectionCallbackId);
+        
+        // Send to all plugins
+        this.ctx.onMessage("networkconnection", type);
     }
     
     /**

framework/src/com/phonegap/api/IPlugin.java

@@ -87,6 +87,14 @@ public interface IPlugin {
      */
     void onDestroy();
 	
+    /**
+     * Called when a message is sent to plugin. 
+     * 
+     * @param id            The message id
+     * @param data          The message data
+     */
+    public void onMessage(String id, Object data);
+
     /**
      * Called when an activity you launched exits, giving you the requestCode you started it with,
      * the resultCode it returned, and any additional data from it. 

framework/src/com/phonegap/api/PhonegapActivity.java

@@ -65,4 +65,12 @@ public abstract class PhonegapActivity extends Activity {
      * @param url				The URL to load.
      */
     abstract public void loadUrl(String url);
+    
+    /**
+     * Send a message to all plugins. 
+     * 
+     * @param id            The message id
+     * @param data          The message data
+     */
+    abstract public void onMessage(String id, Object data);
 }

framework/src/com/phonegap/api/Plugin.java

@@ -103,6 +103,15 @@ public abstract class Plugin implements IPlugin {
     public void onDestroy() {
     }
 	
+    /**
+     * Called when a message is sent to plugin. 
+     * 
+     * @param id            The message id
+     * @param data          The message data
+     */
+    public void onMessage(String id, Object data) {
+    }
+
     /**
      * Called when an activity you launched exits, giving you the requestCode you started it with,
      * the resultCode it returned, and any additional data from it. 

framework/src/com/phonegap/api/PluginManager.java

@@ -318,7 +318,23 @@ public final class PluginManager {
     		plugin.onDestroy();
     	}
     }
-    
+
+    /**
+     * Send a message to all plugins. 
+     * 
+     * @param id            The message id
+     * @param data          The message data
+     */
+    public void onMessage(String id, Object data) {
+        java.util.Set<Entry<String,IPlugin>> s = this.plugins.entrySet();
+        java.util.Iterator<Entry<String,IPlugin>> it = s.iterator();
+        while(it.hasNext()) {
+            Entry<String,IPlugin> entry = it.next();
+            IPlugin plugin = entry.getValue();
+            plugin.onMessage(id, data);
+        }
+    }
+
     /**
      * Called when the activity receives a new intent. 
      */