Question

在google服务的最新更新中，Google已经对LocationClient api进行了处理，现在说使用GoogleApiClient。

现在需要创建带有GPS报告的应用程序，任何30秒到我的网络服务器，但没有找到（或不明白）如何工作这个新的api。

如果您有使用GoogleApiClient的示例，请通过链接查看或下载。

如果您使用GoogleApiClient提供服务，请通过链接

感谢您的帮助。

Answer 1

如果您已安装android sdk，则只需检查目录\extras\google\google_play_services\samples\maps\src\com\example\mapdemo\。

有一个示例显示GoogleMap中的当前位置，使用GoogleApiClient检索定期间隔为5的当前位置秒，如下面的代码所述。您可以根据自己的要求进行修改。

<强> MyLocationDemoActivity.java

    public class MyLocationDemoActivity extends FragmentActivity
        implements
        ConnectionCallbacks,
        OnConnectionFailedListener,
        LocationListener,
        OnMyLocationButtonClickListener {

    private GoogleMap mMap;

    private GoogleApiClient mGoogleApiClient;
    private TextView mMessageView;

    // These settings are the same as the settings for the map. They will in fact give you updates
    // at the maximal rates currently possible.
    private static final LocationRequest REQUEST = LocationRequest.create()
            .setInterval(5000)         // 5 seconds
            .setFastestInterval(16)    // 16ms = 60fps
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.my_location_demo);
        mMessageView = (TextView) findViewById(R.id.message_text);
    }

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

    @Override
    public void onPause() {
        super.onPause();
        if (mGoogleApiClient != null) {
            mGoogleApiClient.disconnect();
        }
    }

    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();
            // Check if we were successful in obtaining the map.
            if (mMap != null) {
                mMap.setMyLocationEnabled(true);
                mMap.setOnMyLocationButtonClickListener(this);
            }
        }
    }

    private void setUpGoogleApiClientIfNeeded() {
        if (mGoogleApiClient == null) {
            mGoogleApiClient = new GoogleApiClient.Builder(this)
                    .addApi(LocationServices.API)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .build();
        }
    }

    /**
     * Button to get current Location. This demonstrates how to get the current Location as required
     * without needing to register a LocationListener.
     */
    public void showMyLocation(View view) {
        if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
            String msg = "Location = "
                    + LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
            Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
        }
    }

    /**
     * Implementation of {@link LocationListener}.
     */
    @Override
    public void onLocationChanged(Location location) {
        mMessageView.setText("Location = " + location);
    }

    /**
     * Callback called when connected to GCore. Implementation of {@link ConnectionCallbacks}.
     */
    @Override
    public void onConnected(Bundle connectionHint) {
        LocationServices.FusedLocationApi.requestLocationUpdates(
                mGoogleApiClient,
                REQUEST,
                this);  // LocationListener
    }

    /**
     * Callback called when disconnected from GCore. Implementation of {@link ConnectionCallbacks}.
     */
    @Override
    public void onConnectionSuspended(int cause) {
        // Do nothing
    }

    /**
     * Implementation of {@link OnConnectionFailedListener}.
     */
    @Override
    public void onConnectionFailed(ConnectionResult result) {
        // Do nothing
    }

    @Override
    public boolean onMyLocationButtonClick() {
        Toast.makeText(this, "MyLocation button clicked", Toast.LENGTH_SHORT).show();
        // Return false so that we don't consume the event and the default behavior still occurs
        // (the camera animates to the user's current position).
        return false;
    }
}

Answer 2

我遇到了同样的问题。您需要明确使用GoogleMap.setLocationSource()。

以下是一个示例：Android: Google Maps location with low battery usage

使用GoogleApiClient的GPS追踪器

2 个答案: