HttpURLConnection Herunterladen von Daten ist zu langsam

Question

Ich habe eine Anwendung, die Daten von youtube Videos herunterladen und verarbeiten wird, um die Video-Bild und Titel und Video-Qualität zu erhalten, aber es dauert zu viel Zeit und die Anwendung ist Buggy gibt es mein Code:

package amaigh.halzoun; 
import android.app.Activity; 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.EditText; 
import android.widget.ImageView; 
import android.widget.Spinner; 
import android.widget.TextView; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.net.HttpURLConnection; 
import java.net.MalformedURLException; 
import java.net.URL; 
import java.util.ArrayList; 
import java.util.concurrent.ExecutionException; 
import java.util.regex.Matcher; 
import java.util.regex.Pattern; 


public class MainActivity extends Activity { 
    int contentlenght; 
    public class DownloadTask extends AsyncTask<String, Void , String> { 
     @Override 
     protected String doInBackground(String... urls) { 
      String result = ""; 
      URL url; 
      HttpURLConnection urlConnection = null; 

      try { 

       url = new URL(urls[0]); 

       urlConnection = (HttpURLConnection)url.openConnection(); 
       contentlenght = urlConnection.getResponseCode(); 
       if (contentlenght == 200) { 
        InputStream in = urlConnection.getInputStream(); 
        InputStreamReader reader = new InputStreamReader(in); 

        int data = reader.read(); 

        while (data != -1) { 

         char current = (char) data; 

         result += current; 

         data = reader.read(); 

        } 

        return result; 
       } 
       else 
        return "Connection Lost"; 

      } 
      catch(Exception e) { 

       e.printStackTrace(); 

       return "Failed"; 

      } 


     } 

    } 
    public class ImageDownload extends AsyncTask<String,Void,Bitmap>{ 

     @Override 
     protected Bitmap doInBackground(String... urls) { 
      try{ 
       URL url = new URL(urls[0]); 
       Log.i("DOWNLOAD IMAGE URL:" ,url.toString()); 
       HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection(); 
       urlConnection.connect(); 
       InputStream in = urlConnection.getInputStream(); 
       Bitmap image = BitmapFactory.decodeStream(in); 
       return image; 
      } catch (MalformedURLException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
      return null; 
     } 
    } 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
    public void Start (View view) 
    { 
     String Url = ""; 
     ImageView VideoImage = (ImageView)findViewById(R.id.imageView2); 
     EditText URLInput = (EditText)findViewById(R.id.URL); 
     Url = URLInput.getText().toString(); 
     Log.i("Original URL: ", Url); 
     Url = Url.replace("watch?v=","embed/"); 
     Log.i("Title URL: ", Url); 
     DownloadTask GetTitle = new DownloadTask(); 
     String result = ""; 
     String VideoUrl = Url.replace("https://www.youtube.com/embed/","https://i.ytimg.com/vi/"); 
     VideoUrl += "/hqdefault.jpg"; 
     ImageDownload imageDownloader = new ImageDownload(); 
     Bitmap image = null; 
     try { 

      result = GetTitle.execute(Url).get(); 
      image = imageDownloader.execute(VideoUrl).get(); 
      VideoImage.setImageBitmap(image); 

     } catch (InterruptedException e) { 

      e.printStackTrace(); 

     } catch (ExecutionException e) { 

      e.printStackTrace(); 

     } 
     GetTitle(result); 
     Url = URLInput.getText().toString(); 
     DownloadTask GetVideoInfo = new DownloadTask(); 
     result = ""; 

     try { 

      result = GetVideoInfo.execute(Url).get(); 

     } catch (InterruptedException e) { 

      e.printStackTrace(); 

     } catch (ExecutionException e) { 

      e.printStackTrace(); 

     } 
     Log.i("Resultat: ", result); 

    } 
    public void GetTitle(String Content){ 
     String searchString = "<title>(.*?)</title>"; 
     Pattern p = Pattern.compile(searchString); 
     TextView VideoTitle = (TextView)findViewById(R.id.VideoTitle); 
     Matcher m = p.matcher(Content); 
     while (m.find()){ 
      Log.i("Title: ", m.group(1)); 
      VideoTitle.setText(m.group(1)); 
     } 
    } 
    public void GetInfo(String Content){ 
     ArrayList<String> VideoQuality = new ArrayList<>(); 
     String searchString = "quality_label=(.*?)p"; 
     Pattern p = Pattern.compile(searchString); 
     Matcher m = p.matcher(Content); 
     while (m.find()){ 
      VideoQuality.add(m.group(0).replace("quality_label=","")); 
     } 
     int a = 0; 

     VideoQuality.remove(0); 
     VideoQuality.remove(2); 
     VideoQuality.remove(4); 
     VideoQuality.remove(6); 
     VideoQuality.remove(8); 
     VideoQuality.remove(10); 

     ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,VideoQuality); 
     Spinner Spinner = (Spinner)findViewById(R.id.spinner); 
     Spinner.setAdapter(adapter); 
    } 

} 

Bitte sagen Sie mir, was ich

Answer 1

falsch gemacht haben Sie Restful Web Services von Spring verwenden kann, kann es Ihnen helfen, durch eine Verringerung der Bearbeitungszeit sein kann und die Effizienz zu steigern. Und Sie erhalten für Objekt oder andere Methode, um die Daten von einem WebUrl, herunterladen es auch die Kopfschmerzen der Analyse der Daten zu verringern und auch die Größe des Codes zu verringern.

Als Referenz finden Sie unter: https://spring.io/guides/gs/consuming-rest/