android - GoogleMap 未在真实设备上显示

Question

问题是我向我的应用程序添加了 GoogleMap Activity ，我什至获得了 key ，但 map 只显示在模拟器中。当我在不同的设备上下载我的应用程序时， map 无法使用。我所能看到的只是一个空 View ，但带有“Google”字符串和“+-”键。我认为加载时间太长，但我认为 Wi-Fi 不能超过 10 分钟。这是我的代码:

MapsActivity.java

public class MapsActivity extends ActionBarActivity {

private GoogleMap mMap; // Might be null if Google Play services APK is not available.
private static final LatLng TRACKTOR = new LatLng(55.1747, 61.2871);


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


    LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
    boolean enabled = service
            .isProviderEnabled(LocationManager.GPS_PROVIDER);

   // check if enabled and if not send user to the GPS settings
   // Better solution would be to display a dialog and suggesting to
   // go to the settings
    if (!enabled) {
        Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
        startActivity(intent);
    }


    // Move the camera instantly to Sydney with a zoom of 15.
    mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(TRACKTOR, 15));

// Zoom in, animating the camera.
    mMap.animateCamera(CameraUpdateFactory.zoomIn());

// Zoom out to zoom level 10, animating with a duration of 2 seconds.
    mMap.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);

// Construct a CameraPosition focusing on Mountain View and animate the camera to that position.
    CameraPosition cameraPosition = new CameraPosition.Builder()
            .target(TRACKTOR)      // Sets the center of the map to Mountain View
            .zoom(17)                   // Sets the zoom
            .bearing(90)                // Sets the orientation of the camera to east
            .tilt(30)                   // Sets the tilt of the camera to 30 degrees
            .build();                   // Creates a CameraPosition from the builder
    mMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

}

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

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();
        Log.w("MAP","is showing now!");
        // Check if we were successful in obtaining the map.
        if (mMap != null) {
            setUpMap();
        } else Log.w("MAP","is not showing!");
    }
}

/**
 * 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(55.1747, 61.2871)).title("Ледовая арена \"Трактор\""));
    mMap.setBuildingsEnabled(true);
  }
}

activity_maps.xml

<fragment 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:id="@+id/map"
tools:context="com.project1.2014.MapsActivity"
android:name="com.google.android.gms.maps.SupportMapFragment"/>

Answer 1

发生这种情况是因为您使用了仅在通过 ADT 部署时才有效的调试 key 。

您的应用需要发布 key 才能在所有手机上运行。

你可以查看here关于发布证书