Android 未在活动中获取位置更新

我正在尝试developer.android.com上的代码，但无法接收位置更新。它只显示一次位置，然后停止。这是我的密码。请告诉我我做错了什么

public class TestClass extends FragmentActivity implements
    GooglePlayServicesClient.ConnectionCallbacks,
    GooglePlayServicesClient.OnConnectionFailedListener, LocationListener {

LocationClient mLocationClient;
Location mLocation;
boolean mUpdatesRequested;
// Milliseconds per second
private static final int MILLISECONDS_PER_SECOND = 1000;
// Update frequency in seconds
public static final int UPDATE_INTERVAL_IN_SECONDS = 5;
// Update frequency in milliseconds
private static final long UPDATE_INTERVAL = MILLISECONDS_PER_SECOND
        * UPDATE_INTERVAL_IN_SECONDS;
// The fastest update frequency, in seconds
private static final int FASTEST_INTERVAL_IN_SECONDS = 1;
// A fast frequency ceiling in milliseconds
private static final long FASTEST_INTERVAL = MILLISECONDS_PER_SECOND
        * FASTEST_INTERVAL_IN_SECONDS;
// Define an object that holds accuracy and frequency parameters
LocationRequest mLocationRequest;
SharedPreferences mPrefs;
Editor mEditor;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.test_main);
    mLocationClient = new LocationClient(this, this, this);
    mLocationRequest = LocationRequest.create();
    // Use high accuracy
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    // Set the update interval to 5 seconds
    mLocationRequest.setInterval(UPDATE_INTERVAL);
    // Set the fastest update interval to 1 second
    mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
    // Open the shared preferences
    mPrefs = getSharedPreferences("SharedPreferences", Context.MODE_PRIVATE);
    // Get a SharedPreferences editor
    mEditor = mPrefs.edit();
    /*
     * Create a new location client, using the enclosing class to handle
     * callbacks.
     */
    mLocationClient = new LocationClient(this, this, this);
    // Start with updates turned off
    mUpdatesRequested = false;

}

@Override
protected void onStart() {
    // TODO Auto-generated method stub
    super.onStart();
    mLocationClient.connect();
}

@Override
protected void onPause() {
    // Save the current setting for updates
    mEditor.putBoolean("KEY_UPDATES_ON", mUpdatesRequested);
    mEditor.commit();
    super.onPause();
}

@Override
protected void onResume() {
    /*
     * Get any previous setting for location updates Gets "false" if an
     * error occurs
     */
    super.onResume();
    if (mPrefs.contains("KEY_UPDATES_ON")) {
        mUpdatesRequested = mPrefs.getBoolean("KEY_UPDATES_ON", false);

        // Otherwise, turn off location updates
    } else {
        mEditor.putBoolean("KEY_UPDATES_ON", false);
        mEditor.commit();
    }
}

@Override
protected void onStop() {
    // TODO Auto-generated method stub
    if (mLocationClient.isConnected()) {
        /*
         * Remove location updates for a listener. The current Activity is
         * the listener, so the argument is "this".
         */
        removeLocationUpdates(this);
    }
    /*
     * After disconnect() is called, the client is considered "dead".
     */
    mLocationClient.disconnect();
    super.onStop();
}

private void removeLocationUpdates(TestClass testClass) {
    // TODO Auto-generated method stub

}

@Override
public void onConnectionFailed(ConnectionResult arg0) {
    // TODO Auto-generated method stub

}

@Override
public void onConnected(Bundle arg0) {
    // TODO Auto-generated method stub
    Toast.makeText(getApplicationContext(), "Connected", Toast.LENGTH_LONG)
            .show();
    mLocation = mLocationClient.getLastLocation();
    Toast.makeText(getApplicationContext(), "One " + mLocation + " Two",
            Toast.LENGTH_LONG).show();

}

public void onLocationChanged(Location location) {
    // Report to the UI that the location was updated
    String msg = "Updated Location: "
            + Double.toString(location.getLatitude()) + ","
            + Double.toString(location.getLongitude());
    Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
    // If already requested, start periodic updates
    if (mUpdatesRequested) {
        mLocationClient.requestLocationUpdates(mLocationRequest, this);
    }
}

@Override
public void onDisconnected() {
    // TODO Auto-generated method stub
    Toast.makeText(getApplicationContext(), "Disconnected",
            Toast.LENGTH_LONG).show();
}
   }

作为一项快速建议：

公共位置请求设置间隔（长毫秒）

这个间隔是不精确的。您可能根本接收不到更新（如果没有可用的位置源），或者您接收更新的速度可能比请求的慢

您确定正在获取位置数据吗

UPD

---

字段

mUpdatesRequested

在此代码中从未设置为true。清除prefs（清除设置中的应用程序数据）并设置

mUpdatesRequested=trueonCreate

中的code>并在

onResume

方法中注释代码，因为它总是将

mUpdatesRequested

设置为false。或者事先用真值保存pref。

我在第一次加载活动时得到它。那么我应该将其更改为什么？第一次位置管理器向您提供最后已知的位置数据，之后您不会收到任何更新，因为您没有任何可用的位置源。这是我的建议。比如说，你们有gps吗？哦！在我看来，

mUpdatesRequested

从未设置为true:）我在声明时将其设置为true。仍然不起作用