在 Android 上获取位置

Question

我是运行这段代码，但在 logcat 上看不到任何重要内容。

我错过了什么？

这是我的 activity class:

public class MainActivity extends Activity implements  LocationListener, ConnectionCallbacks, OnConnectionFailedListener, com.google.android.gms.location.LocationListener {

       GoogleApiClient mGoogleApiClient;

       LocationRequest mLocationRequest;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button btnStart = (Button) findViewById(R.id.btnStart);

        Button btnStop = (Button) findViewById(R.id.btnStop);


        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();
        btnStart.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                //SERVICE STARTED HERE
//                 Intent i = new Intent(getBaseContext(),MainService.class);
//                 getBaseContext().startService(i);  
                   Log.d("SERVİCE", "START");
                   mGoogleApiClient.connect();
                   Toast.makeText(v.getContext(), "SERVICE START", Toast.LENGTH_SHORT).show();
            }
        });

        btnStop.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                //SERVICE STOP HERE
                 Intent i = new Intent(getBaseContext(),MainService.class);
                 getBaseContext().stopService(i); 
                   Log.d("SERVİCE", "STOP");
                   mGoogleApiClient.disconnect();
                Toast.makeText(v.getContext(), "SERVICE STOP", Toast.LENGTH_SHORT).show();

            }
        });


    }
//  @Override
//  public void onLocationChanged(Location location) {
//      // TODO Auto-generated method stub
//      Log.d("KORDINAT-lat", String.valueOf(location.getLatitude()));
//      Log.d("KORDINAT-long", String.valueOf(location.getLongitude()));
//  }
    @Override
    public void onConnectionFailed(ConnectionResult arg0) {
        // TODO Auto-generated method stub
        Log.d("TAG", "GoogleApiClient connection has failed");
    }
    @Override
    public void onConnected(Bundle arg0) {
        // TODO Auto-generated method stub
          mLocationRequest = LocationRequest.create();
            mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
            mLocationRequest.setInterval(2000); // Update location every second

            LocationServices.FusedLocationApi.requestLocationUpdates(
                    mGoogleApiClient, mLocationRequest, this);
//          
//       Location location=   LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
//       Log.d("KORDINAT-lat", String.valueOf(location.getLatitude()));
//       Log.d("KORDINAT-long", String.valueOf(location.getLongitude()));

    }
    @Override
    public void onConnectionSuspended(int arg0) {
        // TODO Auto-generated method stub
         Log.d("TAG", "GoogleApiClient connection has been suspend");
    }
    @Override
    public void onLocationChanged(Location location) {
        // TODO Auto-generated method stub
        Log.d("Location received: " , location.toString());
    }
    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub

    }
    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub

    }
    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub

    }
    }

我还在 Android 文件上添加了所需的权限，如下所示：

 <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

也加了meta-data但是好像什么都没发生什么事。 Logcat 没有显示错误。

Answer 1

你期望输出什么？如果客户端连接成功，它只是请求位置更新。如果位置没有改变，它不会输出任何东西。

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