Can't create handler inside thread that has not called Looper.prepare() 异常

错误原因：

Android中不能在子线程中来刷新UI线程

解决方法：

//使用runOnUiThread方法刷新UI
runOnUiThread(new Runnable() {
    @Override
    public void run() {
        //刷新UI
    }
});

常见问题：

调用 LocationManager 获取当前位置信息并实时上传时，出现该错误的原因是 LocationManager 需要在主线程中使用。推荐如下方法：

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

    //上传位置信息
    Button btnUploadGPS = (Button)findViewById(R.id.btn_upload_gps);
    if (btnUploadGPS != null){
        btnUploadGPS .setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                uploadGPS();
            }
        });
    }
}

private void uploadGPS(){    
    final LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
    locationManager.requestLocationUpdates(
            LocationManager.GPS_PROVIDER,
            2000,
            (float) 0.01,
            new LocationListener() {
                @Override
                public void onLocationChanged(Location location) {
                    asyncUploadGPS(location);
                }

                @Override
                public void onStatusChanged(String provider, int status, Bundle extras) {

                }

                @Override
                public void onProviderEnabled(String provider) {
                    asyncUploadGPS(locationManager.getLastKnownLocation(provider));
                }

                @Override
                public void onProviderDisabled(String provider) {
                    asyncUploadGPS(null);
                }
            }
    );
}

private void asyncUploadGPS(final Location currentLocation) {
    new Thread(new Runnable() {
        @Override
        public void run() {
            //上传位置信息
        }
    }).start();
}