我尝试将自定义手势检测器附加到Android Studio生成的GoogleMap活动中。我已经能够附加OnMapLongClickListener，但我想附加我自己的SimpleOnGestureListener扩展类。下面是我的两个类的代码。是否可以将GestureDetector类与Maps活动一起使用，我将如何进行此操作？
以下是我的手势探测器类的代码
import android.util.Log;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.model.LatLng;
import java.util.Map;
/**
* Created by Chris on 5/6/16.
*/
public class MapGestureListener extends SimpleOnGestureListener implements GoogleMap.OnMapLongClickListener {
public static final String LOG_TAG = MapGestureListener.class.getSimpleName();
@Override
public void onLongPress(MotionEvent e) {
super.onLongPress(e);
Log.v(LOG_TAG,"Long press detected");
}
@Override
public void onMapLongClick(LatLng latLng) {
Log.v(LOG_TAG,"Long press detected Map: " +latLng.toString());
}
}
以下是MapsActivity类的代码
import android.content.pm.PackageManager;
import android.location.Location;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.*;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class Main extends FragmentActivity implements OnMapReadyCallback, ConnectionCallbacks, OnConnectionFailedListener {
private GoogleMap mMap;
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
private float mZoomLevel = 18;
public static final String LOG_TAG = Main.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
}
protected void onStart() {
mGoogleApiClient.connect();
super.onStart();
}
protected void attachListener() {
View view = this.findViewById(R.id.main);
view.setClickable(true);
view.setFocusable(true);
GestureDetector.SimpleOnGestureListener gestureListener = new MapGestureListener();
final GestureDetector gd = new GestureDetector(this, gestureListener);
mMap.setOnMapLongClickListener((GoogleMap.OnMapLongClickListener) gestureListener);
view.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
Log.v(LOG_TAG,"Touch Event");
gd.onTouchEvent(motionEvent);
return false;
}
});
}
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
mMap.setMyLocationEnabled(true);
attachListener();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
moveMap(mLastLocation);
}
public void moveMap(LatLng loc)
{
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(loc,mZoomLevel));
}
public void moveMap(Location loc)
{
double latCoord = loc.getLatitude();
double longCoord = loc.getLongitude();
LatLng latLng = new LatLng(latCoord,longCoord);
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,mZoomLevel));
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
}
答案 0 :(得分：0)
我在以下问题Google Maps Android API v2 - detect touch on map中找到了我的问题的答案。我唯一要改变的是在TouchableWrapper类中，我改为使用GestureDetector而不是简单地输出触摸事件。
以下是我对TouchableWrapper.java的更改：
import android.content.Context;
import android.support.v4.view.GestureDetectorCompat;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.FrameLayout;
public class TouchableWrapper extends FrameLayout {
public static final String LOG_TAG = TouchableWrapper.class.getSimpleName();
protected GestureDetector.SimpleOnGestureListener mGestureListener;
private GestureDetectorCompat mDetector;
public TouchableWrapper(Context context) {
super(context);
mGestureListener = new MapGestureListener();
mDetector = new GestureDetectorCompat(context,mGestureListener);
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
mDetector.onTouchEvent(event);
return super.dispatchTouchEvent(event);
}
}