auto import from //depot/cupcake/@137055

src/com/android/settings/bluetooth/LocalBluetoothManager.java

@@ -23,6 +23,7 @@ import java.util.List;
 
 import android.app.Activity;
 import android.app.AlertDialog;
+import android.bluetooth.BluetoothA2dp;
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.content.Intent;
@@ -51,11 +52,13 @@ public class LocalBluetoothManager {
     private Context mContext;
     /** If a BT-related activity is in the foreground, this will be it. */
     private Activity mForegroundActivity;
-    
+    private AlertDialog mErrorDialog = null;
+
     private BluetoothDevice mManager;
 
     private LocalBluetoothDeviceManager mLocalDeviceManager;
     private BluetoothEventRedirector mEventRedirector;
+    private BluetoothA2dp mBluetoothA2dp;
     
     public static enum ExtendedBluetoothState { ENABLED, ENABLING, DISABLED, DISABLING, UNKNOWN }
     private ExtendedBluetoothState mState = ExtendedBluetoothState.UNKNOWN;
@@ -95,7 +98,9 @@ public class LocalBluetoothManager {
 
         mEventRedirector = new BluetoothEventRedirector(this);
         mEventRedirector.start();
-       
+
+        mBluetoothA2dp = new BluetoothA2dp(context);
+
         return true;
     }
     
@@ -112,6 +117,10 @@ public class LocalBluetoothManager {
     }
     
     public void setForegroundActivity(Activity activity) {
+        if (mErrorDialog != null) {
+            mErrorDialog.dismiss();
+            mErrorDialog = null;
+        }
         mForegroundActivity = activity;
     }
     
@@ -149,9 +158,23 @@ public class LocalBluetoothManager {
              */ 
             dispatchScanningStateChanged(true);
         } else {
-            
-            // Don't scan more than frequently than SCAN_EXPIRATION_MS, unless forced
-            if (!force && mLastScan + SCAN_EXPIRATION_MS > System.currentTimeMillis()) return;
+            if (!force) {
+                // Don't scan more than frequently than SCAN_EXPIRATION_MS,
+                // unless forced
+                if (mLastScan + SCAN_EXPIRATION_MS > System.currentTimeMillis()) {
+                    return;
+                }
+
+                // If we are playing music, don't scan unless forced.
+                List<String> sinks = mBluetoothA2dp.listConnectedSinks();
+                if (sinks != null) {
+                    for (String address : sinks) {
+                        if (mBluetoothA2dp.getSinkState(address) == BluetoothA2dp.STATE_PLAYING) {
+                            return;
+                        }
+                    }
+                }
+            }
             
             if (mManager.startDiscovery(true)) {
                 mLastScan = System.currentTimeMillis();
@@ -235,7 +258,7 @@ public class LocalBluetoothManager {
 
         if (mForegroundActivity != null) {
             // Need an activity context to show a dialog
-            AlertDialog ad = new AlertDialog.Builder(mForegroundActivity)
+            mErrorDialog = new AlertDialog.Builder(mForegroundActivity)
                 .setIcon(android.R.drawable.ic_dialog_alert)
                 .setTitle(titleResId)
                 .setMessage(message)