问如何在didRangeBeaconsInRegion中使用测距

EN

public class MyApplicationName extends Application implements BootstrapNotifier {
private static final String TAG = ".MyApplicationName";
private RegionBootstrap regionBootstrap;
private BeaconManager beaconManager;

List region_list = new ArrayList();

@Override
public void onCreate() {
    super.onCreate();
    Log.d(TAG, "App started up");
    // wake up the app when any beacon is seen (you can specify specific id filers in the parameters below)
    List region_list = myRegionList();
    regionBootstrap = new RegionBootstrap(this, region_list);

    BeaconManager beaconManager = BeaconManager.getInstanceForApplication(this);
    beaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24"));
    beaconManager.setBackgroundScanPeriod(3000l);
    beaconManager.setBackgroundBetweenScanPeriod(5000l);
}

@Override
public void didDetermineStateForRegion(int arg0, Region arg1) {
    // Don't care
}

@Override
public void didEnterRegion(Region region) {
    Log.d(TAG, "Got a didEnterRegion call");
    // This call to disable will make it so the activity below only gets launched the first time a beacon is seen (until the next time the app is launched)
    // if you want the Activity to launch every single time beacons come into view, remove this call.
    regionBootstrap.disable();
    Intent intent = new Intent(this, MyActivity.class);
    // IMPORTANT: in the AndroidManifest.xml definition of this activity, you must set android:launchMode="singleInstance" or you will get two instances
    // created when a user launches the activity manually and it gets launched from here.
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    this.startActivity(intent);

    String zone = region.toString();
    Log.d(TAG, "Enter in region");
    String text = "Enter in " + zone;
    Log.d(TAG, text);
    String uuid = "UUID : " + region.getId1();
    Log.d(TAG, uuid);
    //This part is not working
    beaconManager.setRangeNotifier(this);
    beaconManager.startRangingBeaconsInRegion(region);
}

@Override
public void didExitRegion(Region arg0) {
    // Don't care
}

public class MyActivity extends Activity{
public final static String EXTRA_MESSAGE = "com.example.myapp.MESSAGE";
/**
 * Called when the activity is first created.
 */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Log.d("myActivity","onCreate");

}