小编Pro*_*cas的帖子

我知道BroadcastReceiver会监视文本,电话事件等...但您可以将LocationServices作为基于位置的服务和事件运行吗？

例如,您靠近某个GPS点,手机会通知您.

有没有办法删除设置的视图

setContentView(R.layout.set_map_center);
mapView = (MapView) findViewById(R.id.mapview);

如果我再次调用此视图，则会收到一条错误消息：

java.lang.IllegalStateException: 一个 MapActivity 中只能有一个 MapView

我无法在位置监听器内调用toast.Maketext.上下文不可用,我做错了什么？

private LocationListener ll = new LocationListener() {

    public void onLocationChanged(Location l) {
        // SMSReceiver.l = l;
        String s = "";
        s += "\tTime: " + l.getTime() + "\n";
        s += "\tLatitude:  " + l.getLatitude() + "°\n";
        s += "\tLongitude: " + l.getLongitude() + "°\n";
        s += "\tAccuracy:  " + l.getAccuracy() + " metres\n";
        s += "\tAltitude:  " + l.getAltitude() + " metres\n";
        s += "\tSpeed:  " + l.getSpeed() + " metres\n";

        // TODO Auto-generated method stub
        if (l.hasSpeed()) { …