Added flush() for bluetooth output stream

Bug 8498784

Zebra QL420 Plus Bluetooth printer fails on Android 4.2.2

1 files changed, 11 insertions, 0 deletions

diff --git a/core/java/android/bluetooth/BluetoothOutputStream.java b/core/java/android/bluetooth/BluetoothOutputStream.java
index 62242a2672ff..117dd47c1ab1 100644
--- a/core/java/android/bluetooth/BluetoothOutputStream.java
+++ b/core/java/android/bluetooth/BluetoothOutputStream.java
@@ -84,4 +84,15 @@ import java.io.OutputStream;
         }
         mSocket.write(b, offset, count);
     }
+    /**
+     * Wait until the data in sending queue is emptied. A polling version
+     * for flush implementation. Use it to ensure the writing data afterwards will
+     * be packed in the new RFCOMM frame.
+     * @throws IOException
+     *             if an i/o error occurs.
+     * @since Android 4.2.3
+     */
+    public void flush()  throws IOException {
+        mSocket.flush();
+    }
 }