问如何用Android中的Google按类别隐藏/显示一组标记？

EN

public class MapsActivity extends FragmentActivity {

//Restaurants
private final LatLng LOCATION_DINEMORE = new LatLng(6.9270786,79.861243);
private final LatLng LOCATION_BARISTA = new LatLng(6.0334009,80.218384);

//Hotels
private final LatLng LOCATION_AVENRA = new LatLng(7.211111,79.838610);
private final LatLng LOCATION_MOUNTBATTEN = new LatLng(7.296411,80.635012);

private GoogleMap mMap; // Might be null if Google Play services APK is not available.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    setUpMapIfNeeded();

    // Give text to buttons
    Button buttonloc1 = (Button)findViewById(R.id.btnLoc1);
    buttonloc1.setText("Dinemore");

    Button buttonloc2 = (Button)findViewById(R.id.btnLoc2);
    buttonloc2.setText("Barista");

    Button buttoncity = (Button)findViewById(R.id.btnCity);
    buttoncity.setText("My Location");

    Button buttonremove = (Button)findViewById(R.id.removeMarker);
    buttonremove.setText("Remove");

   /* Location myLocation = mMap.getMyLocation();

    mMap.addMarker(new MarkerOptions()
                    .position(new LatLng(myLocation.getLatitude(), myLocation.getLongitude()))
                    .title("Hi I'm Here..:D")
    );*/

    // Marker to Dinemore
    mMap.addMarker(new MarkerOptions()
                    .position(LOCATION_DINEMORE)
                    .title("Dinemore")
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ROSE))
    );

    // Marker to Barista
    mMap.addMarker(new MarkerOptions()
                    .position(LOCATION_BARISTA)
                    .title("Barista Lavazza")
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ROSE))
    );

    // Marker to Avenra Garden Hotel
    mMap.addMarker(new MarkerOptions()
                    .position(LOCATION_AVENRA)
                    .title("Avenra Garden")
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW))
    );

    // Marker to Mounbatten Bunglow
    mMap.addMarker(new MarkerOptions()
                    .position(LOCATION_MOUNTBATTEN)
                    .title("Mounbatten Bunglow")
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW))
    );

    //When touch again on the map marker title will hide
    mMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
        @Override
        public void onInfoWindowClick(Marker marker) {

        }
    });

    ArrayList<Marker> category1=new ArrayList<>();
    ArrayList<Marker> category2=new ArrayList<>();

    for (int i=0; i< category1.size(); i++){
        category1.get(i).remove();
    }

}

@Override
protected void onResume() {
    super.onResume();
    setUpMapIfNeeded();
}

public void onClick_City(View v){
    mMap.setMyLocationEnabled(true);
}

// When click on this button, Map shows the place of Dinemore
public void onClick_Loc1(View v) {
    mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
    CameraUpdate update = CameraUpdateFactory.newLatLngZoom(LOCATION_DINEMORE,10);
    mMap.animateCamera(update);
}

// When click on this button, Map shows the place of Barista
public void onClick_Loc2(View v) {
    mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
    CameraUpdate update = CameraUpdateFactory.newLatLngZoom(LOCATION_BARISTA,10);
    mMap.animateCamera(update);
}

// To rmove All the Markers
public void onClick_Remove(View v){
    mMap.clear();
}

private void setUpMapIfNeeded() {
    // Do a null check to confirm that we have not already instantiated the map.
    if (mMap == null) {
        // Try to obtain the map from the SupportMapFragment.
        mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                .getMap();
        // Check if we were successful in obtaining the map.
        if (mMap != null) {
            setUpMap();
        }
    }
}

/**
 * This is where we can add markers or lines, add listeners or move the camera. In this case, we
 * just add a marker near Africa.
 * <p/>
 * This should only be called once and when we are sure that {@link #mMap} is not null.
 */
private void setUpMap() {
    mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="10dip"
android:paddingLeft="10dip"
android:paddingRight="10dip"
android:paddingTop="10dip"
tools:context=".MapsActivity">

<Button
    android:id="@+id/btnLoc1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toRightOf="@+id/btnCity"
    android:layout_alignParentTop="true"
    android:onClick="onClick_Loc1"/>

<fragment
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_below="@+id/btnLoc1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    />

<Button
    android:id="@+id/btnCity"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toRightOf="@+id/btnLoc2"
    android:layout_alignParentTop="true"
    android:onClick="onClick_City"/>

<Button
    android:id="@+id/btnLoc2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:onClick="onClick_Loc2"/>

<Button
    android:id="@+id/removeMarker"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:onClick="onClick_Remove"/>

<CheckBox android:id="@+id/checkbox_restaurant"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toRightOf="@+id/btnLoc1"
    android:text="Restaurants"
    android:onClick="onCheckboxClicked"/>

<CheckBox android:id="@+id/checkbox_hotels"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toRightOf="@+id/checkbox_restaurant"
    android:text="Hotels"
    android:onClick="onCheckboxClicked"/>