嗨,我收到错误"无法解析方法位置管理器.请求位置更新();



Sir,谢谢你的帮助,这是我的程序的完整代码。嗨,我收到错误"无法解析方法locationmanager.requestLocationUpdates();

public class MainActivity extends Activity implements LocationListener {
public Button button;
private TextView textView;
public LocationManager locationmanager;
Context context;
private double lat,lon;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    locationmanager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

    button = (Button) findViewById(R.id.button);
    textView = (TextView) findViewById(R.id.textView);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //error !!!!!!

**错误**locationmanager.requestLocationUpdates(locationmanager.GPS_PROVIDER,5000,0,this);

        }
    });
}
@Override
public void onLocationChanged(Location location) {
    if(location!=null)
    {
        lat=location.getLatitude();
        lon=location.getLongitude();
        textView.append("n lat:"+lat+" lon:"+lon);
    }
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}

}

首先,不要使用"gps"。使用LocationManager.GPS_PROVIDER

其次,thisrequestLocationUpdates()的任何签名都不匹配。thisView.OnClickListener,而不是LocationListenerPendingIntent

如果此代码来自某个活动或片段,并且该活动或片段正在实现LocationListener,则使用此MyActivity.this而不是this,其中MyActivity是正在实现LocationListener的活动或片段的名称。

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