Question

private GoogleMap mMap;

我从MainActivity开始一项活动：

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == R.id.nav_car) {
        Intent detailIntent = new Intent(this, Map_Activity.class);
        startActivity(detailIntent);
    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawerLayout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}

并且所有工作正常，直到我得到（错误：（222,97）错误：在这里找不到符号方法getMap（）：

private void setUpMap() {
    if (mMap == null) {
        mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        mMap.setMyLocationEnabled(true);
        mMap.setOnMyLocationChangeListener(this);

    }
}

请帮我解决这个问题！

Answer 1

使用getMapAsync()

的SupportMapFragment

((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMapAsync(new OnMapReadyCallback() {
        @Override
        public void onMapReady(GoogleMap googleMap) {
            mMap  = googleMap;
        }
    });

您可以找到文档here

Answer 2

Google地图的实施现已更改。您需要使用getMapAsync（OnMapReadyCallback回调）

这个新的tutorial将帮助您入门。

Answer 3

＆GT;

private void setUpMapIfNeeded() { if (mMap == null) { SupportMapFragment mapFrag = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)); mapFrag.getMapAsync(this); if (mMap != null) { setUpMap(); } } }

找不到符号方法getMap（）

3 个答案: