I have been searching for weeks for a way to turn on and off the
bluetooth for any Android version from 1.5 onward. I know it must be
possible, since there are widgets in the marketplace that do just
this, however I have never found any answers to my questions. I do
know that I can make it work for Android 1.x using reflection. I also
know it should be possible to use reflection on Android 2.x, but by
retrieving the methods for a different class since the official
bluetooth API was added in 2.0. The code I've got so far is:
private static void BT_Enable(Context context, boolean enable){
String V = android.os.Build.VERSION.RELEASE;
int ver = Integer.valueOf(V.substring(0, 1));
String eMethod = "enable";
if (!enable) {
eMethod = "disable";
}
try{
Object manager = context.getSystemService("bluetooth");
Class<?> c = manager.getClass();
if (ver > 1){c =
Class.forName("android.bluetooth.BluetoothAdapter");}
Method method = c.getMethod(eMethod);
method.setAccessible(true);
method.invoke(manager);
}
catch (Exception e){
Toast.makeText(context, "Error: " + e, 1).show();
}
}
One of the issues that exists in 2.x is that the call
getSystemService("bluetooth") returns null, so to obtain the
appropriate class I've added the following:
if (ver > 1){c =
Class.forName("android.bluetooth.BluetoothAdapter");}
however, since there is no system Bluetooth service, there is no
receiver object to invoke to, causing a failure. Any help is greatly
appreciated.
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