アンドロイドアプリでYoutubeビデオを検索

Question

アプリでYoututbeの動画を検索するアプリを作っています。しかし、例外をスローするSearchListResponse searchResponse = search.execute(); この問題を解決する方法。以下

が

05-07 12:26:33.163 26111-26111/com.dp.videostoreadmin W/System.err: android.os.NetworkOnMainThreadException 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at java.net.InetAddress.lookupHostByName(InetAddress.java:431) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at java.net.InetAddress.getAllByName(InetAddress.java:215) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.Network$1.resolveInetAddresses(Network.java:29) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:188) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.http.RouteSelector.nextProxy(RouteSelector.java:157) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:100) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.http.HttpEngine.createNextConnection(HttpEngine.java:357) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:340) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:330) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:248) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:437) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:114) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.connect(DelegatingHttpsURLConnection.java:89) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:93) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:981) 
05-07 12:26:33.164 26111-26111/com.dp.videostoreadmin W/System.err:  at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:419) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at com.dp.videostoreadmin.MainActivity.displaySearchResult(MainActivity.java:62) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at com.dp.videostoreadmin.MainActivity.access$000(MainActivity.java:22) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at com.dp.videostoreadmin.MainActivity$1.onClick(MainActivity.java:40) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at android.view.View.performClick(View.java:5204) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at android.view.View$PerformClick.run(View.java:21153) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at android.os.Handler.handleCallback(Handler.java:739) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at android.os.Handler.dispatchMessage(Handler.java:95) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at android.os.Looper.loop(Looper.java:148) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at android.app.ActivityThread.main(ActivityThread.java:5417) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at java.lang.reflect.Method.invoke(Native Method) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
05-07 12:26:33.165 26111-26111/com.dp.videostoreadmin W/System.err:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

以下

を実行し、検索時に上げる私の例外で助けてください主なエラーは、実際にユーチューブに関するものではありません私のコードは

import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 

import java.io.IOException; 
import com.google.api.client.googleapis.json.GoogleJsonResponseException; 
import com.google.api.client.http.HttpRequest; 
import com.google.api.client.http.HttpRequestInitializer; 
import com.google.api.client.http.javanet.NetHttpTransport; 
import com.google.api.client.json.jackson2.JacksonFactory; 
import com.google.api.services.youtube.YouTube; 
import com.google.api.services.youtube.model.SearchListResponse; 
import com.google.api.services.youtube.model.SearchResult; 
import java.util.List; 


public class MainActivity extends AppCompatActivity { 
    private static final String YOUTUBE_API_KEY = "AIzaSyCxmfKGyNqlQIEtY0XWxGzC4QHX08BWmks"; 
    EditText searchText; 
    Button submit; 
    private static YouTube youtube; 
    private static final long NUMBER_OF_VIDEOS_RETURNED = 25; 

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

     searchText = (EditText) findViewById(R.id.editText); 
     submit = (Button) findViewById(R.id.submit); 

     submit.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       displaySearchResult(); 
      } 
     }); 
    } 

    private void displaySearchResult() { 

     try { 

      youtube = new YouTube.Builder(new NetHttpTransport(), new JacksonFactory(), new HttpRequestInitializer() { 
       public void initialize(HttpRequest request) throws IOException { 
       } 
      }).setApplicationName("VideoStoreAdmin").build(); 

      YouTube.Search.List search = youtube.search().list("id,snippet"); 
      search.setKey(YOUTUBE_API_KEY); 
      search.setQ(searchText.getText().toString()); 
      search.setType("video"); 
      search.setFields("items(id/kind,id/videoId,snippet/title,snippet/publishedAt,snippet/thumbnails/default/url),nextPageToken"); 
      search.setMaxResults(NUMBER_OF_VIDEOS_RETURNED); 

      // Call the API and print results. 
      SearchListResponse searchResponse = search.execute(); 
      List<SearchResult> searchResultList = searchResponse.getItems(); 
      if (searchResultList != null) { 
       Log.d("TAG",searchResultList.toString()); 
      } 
     } catch (GoogleJsonResponseException e) { 
      System.err.println("There was a service error: " + e.getDetails().getCode() + " : " 
        + e.getDetails().getMessage()); 
     } catch (IOException e) { 
      System.err.println("There was an IO error: " + e.getCause() + " : " + e.getMessage()); 
     } catch (Throwable t) { 
      t.printStackTrace(); 
     } 
    } 

    /* 
    * Prompt the user to enter a query term and return the user-specified term. 
    */ 



} 

Answer 1

である、あなたは上のネットワーク運用を行っていますメインのUIスレッドは許可されていません。

ネットワーク操作用に別のスレッドを実行するには、AsyncTaskを使用する必要があります。あなたのネットワーク操作はdoInBackground（）メソッドの中で動作します。

APIからの応答が得られたら、onPostExecute（）メソッドですべてのUI変更を行う必要があります。

注：doInBackground（）ではUIの変更操作はできません。それは例外をスローするでしょう。

private class YoutubeSearchAPI extends AsyncTask<Void, Void, Void>{ 

    @Override 
    protected Void doInBackground(Void... params) { 
     try { 

      youtube = new YouTube.Builder(new NetHttpTransport(), new JacksonFactory(), new HttpRequestInitializer() { 
       public void initialize(HttpRequest request) throws IOException { 
       } 
      }).setApplicationName("VideoStoreAdmin").build(); 

      YouTube.Search.List search = youtube.search().list("id,snippet"); 
      search.setKey(YOUTUBE_API_KEY); 
      search.setQ(searchText.getText().toString()); 
      search.setType("video"); 
      search.setFields("items(id/kind,id/videoId,snippet/title,snippet/publishedAt,snippet/thumbnails/default/url),nextPageToken"); 
      search.setMaxResults(NUMBER_OF_VIDEOS_RETURNED); 

      // Call the API and print results. 
      SearchListResponse searchResponse = search.execute(); 
      List<SearchResult> searchResultList = searchResponse.getItems(); 
      if (searchResultList != null) { 
       Log.d("TAG",searchResultList.toString()); 
      } 
     } catch (GoogleJsonResponseException e) { 
      System.err.println("There was a service error: " + e.getDetails().getCode() + " : " 
        + e.getDetails().getMessage()); 
     } catch (IOException e) { 
      System.err.println("There was an IO error: " + e.getCause() + " : " + e.getMessage()); 
     } catch (Throwable t) { 
      t.printStackTrace(); 
     } 
     return null; 
    } 

    @Override 
    protected void onPostExecute(Void aVoid) { 
     //Do All UI Changes HERE 
     super.onPostExecute(aVoid); 
    } 
} 

あなたはこのライン

new YoutubeSearchAPI().execute();