小编And*_*ble的帖子

在AsyncTask完成onPostExecute方法时尝试启动意图时遇到问题.我第一次调用它AsyncTask是在启动画面活动中.

public class SplashScreen extends Activity {

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

       startJsonGet();
    }

    public void startJsonGet() {
        JsonGet getData = new JsonGet(mBuildings, SplashScreen.this);
        getData.execute();

    }
}

这称为JsonGet班级

public class JsonGet extends AsyncTask<Void, Void, Void> {

    Context context;

    JsonGet(ArrayList<Building> mBuildings, Context context){
        super();
        this.mBuildings = mBuildings;
        this.context = context;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        // before making http calls

    }

    @Override
    protected Void doInBackground(Void... arg0) {
        JsonParser …

目前正在开发一个Android应用程序,它将最近的20位置返回给用户当前位置.

Google Places API返回约20个位置靠近用户位置,但不是最近的 20个按距离排序.

查看Google Places API文档并未显示任何我认为不正确的内容.

GetPlaces.java

String types = "accounting|airport|amusement_park|aquarium|art_gallery|atm|bakery|bank|bar|beauty_salon|bicycle_store|book_store|bowling_alley|bus_station|cafe|campground|car_dealer|car_rental|car_repair|car_wash|casino|cemetery|church|city_hall|clothing_store|convenience_store|courthouse|dentist|department_store|doctor|electrician|electronics_store|embassy|establishment|finance|fire_station|florist|food|funeral_home|furniture_store|gas_station|general_contractor|grocery_or_supermarket|gym|hair_care|hardware_store|health|hindu_temple|home_goods_store|hospital|insurance_agency|jewelry_store|laundry|lawyer|library|liquor_store|local_government_office|locksmith|lodging|meal_delivery|meal_takeaway|mosque|movie_rental|movie_theater|moving_company|museum|night_club|painter|park|parking|pet_store|pharmacy|physiotherapist|place_of_worship|plumber|police|post_office|real_estate_agency|restaurant|roofing_contractor|rv_park|school|shoe_store|shopping_mall|spa|stadium|storage|store|subway_station|synagogue|taxi_stand|train_station|travel_agency|university|veterinary_care|zoo";
resourceURI = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?location="+myLocation.latitude+","+myLocation.longitude+"&radius=500&rankBy=distance&types="+ URLEncoder.encode(types, "UTF-8")+"&sensor=true&key=GOOGLE_MAPS_KEY";
try {
            String url =resourceURI; //getURL(myLocation.latitude,myLocation.longitude);

            HttpParams httpParams = new BasicHttpParams();
            HttpConnectionParams.setConnectionTimeout(httpParams, 30000);
            HttpConnectionParams.setSoTimeout(httpParams, 30000);
            DefaultHttpClient httpClient = new DefaultHttpClient(httpParams);
            HttpGet httpGet = new HttpGet(url);
            httpGet.setHeader("Content-type", "application/json");
            ResponseHandler responseHandler = new BasicResponseHandler();
            String response = (String) httpClient.execute(httpGet, responseHandler);

            if (response != null) {
                mResult = new JSONObject(response);
                results = mResult.getJSONArray("results");
            }
        }
        catch (ClientProtocolException e) { …

我已按照此处的步骤进行 CameraX 设置，现在我正在尝试使前置摄像头按钮正常工作。

这是我的设置代码：

private lateinit var preview: Preview

private fun startCamera() {

    // Create configuration object for the viewfinder use case
    val previewConfig = PreviewConfig.Builder().apply {
        setLensFacing(CameraX.LensFacing.BACK)
    }.build()

    // Build the viewfinder use case
    preview = Preview(previewConfig)

    // Every time the viewfinder is updated, recompute layout
    preview.setOnPreviewOutputUpdateListener {

        // To update the SurfaceTexture, we have to remove it and re-add it
        val parent = viewFinder.parent as ViewGroup
        parent.removeView(viewFinder)
        parent.addView(viewFinder, 0)

        viewFinder.surfaceTexture = it.surfaceTexture
        updateTransform()
    } …