导航按钮在Google Map Android中不可见

Question

当我们在google map android中使用自己的凭据调用导航意图时，导航按钮不可见。

这是我在活动中调用的代码。

public void NavigatePath(){

   Uri gmmIntentUri = Uri.parse("http://maps.google.com/maps?" + "saddr=" + Sourcelat + "," + Sourcelong + "&daddr=" + Destinationlat + "," + Destinationlong);
   Intent mapIntent = new Intent(Intent.ACTION_VIEW, gmmIntentUri);
   mapIntent.setPackage("com.google.android.apps.maps");
   startActivity(mapIntent);
}

请向我推荐如何显示导航按钮。

Answer 1

我正在使用它，它工作正常：

 String uri = String.format(Locale.ENGLISH, "http://maps.google.com/maps?saddr=%f,%f&daddr=%f,%f", sourceLatitude, sourceLongitude, destinationLatitude, destinationLongitude);
            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
            intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity");
            try
            {
                startActivity(intent);
            }
            catch(ActivityNotFoundException ex)
            {
                try
                {
                    Intent unrestrictedIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
                    startActivity(unrestrictedIntent);
                }
                catch(ActivityNotFoundException innerEx)
                {
                    Toast.makeText(this, "Please install google maps application!", Toast.LENGTH_LONG).show();
                }
            }