Google API for Java 示例代码，api示例代码,Google API f

Google API for Java 示例代码，api示例代码,Google API f

Google API for Java是由Google开发的一个Java客户端类库，用于访问其提供的各种基于HTTP的服务。具有灵活、高效、强大等特点。这是访问基于REST或JSON-RPC的Google API推荐类库。

BigQuerySample.java

import com.google.api.client.googleapis.*;import com.google.api.client.googleapis.auth.clientlogin.*;import com.google.api.client.googleapis.json.*;import com.google.api.client.http.*;import java.io.*;public class BigQuerySample {  public static void main(String[] args) throws IOException {    HttpTransport transport = GoogleTransport.create();    transport.addParser(new JsonCParser());    try {      // authenticate with ClientLogin      ClientLogin authenticator = new ClientLogin();      authenticator.authTokenType = "ndev";      authenticator.username = "...";      authenticator.password = "...";      authenticator.authenticate().setAuthorizationHeader(transport);      // make query request      HttpRequest request = transport.buildGetRequest();      request.setUrl("https://www.googleapis.com/bigquery/v1/query");      request.url.put(          "q", "select count(*) from [bigquery/samples/shakespeare];");      System.out.println(request.execute().parseAsString());    } catch (HttpResponseException e) {      System.err.println(e.response.parseAsString());      throw e;    }  }}

YouTubeSample.java

import com.google.api.client.googleapis.json.*;import com.google.api.client.http.*;import com.google.api.client.util.*;import java.io.*;import java.util.*;public class YouTubeSample {  public static class VideoFeed {    @Key List<Video> items;  }  public static class Video {    @Key String title;    @Key String description;    @Key Player player;  }  public static class Player {    @Key("default") String defaultUrl;  }  public static class YouTubeUrl extends GenericUrl {    @Key final String alt = "jsonc";    @Key String author;    @Key("max-results") Integer maxResults;    YouTubeUrl(String url) { super(url); }  }  public static void main(String[] args) throws IOException {    // setup up the HTTP transport    HttpTransport transport = new HttpTransport();    transport.defaultHeaders.put("GData-Version", "2");    transport.addParser(new JsonCParser());    // build the HTTP GET request and URL    HttpRequest request = transport.buildGetRequest();    YouTubeUrl url = new YouTubeUrl("https://gdata.youtube.com/feeds/api/videos");    url.author = "searchstories";    url.maxResults = 2;    request.url = url;    // execute the request and the parse video feed    VideoFeed feed = request.execute().parseAs(VideoFeed.class);    for (Video video : feed.items) {      System.out.println();      System.out.println("Video title: " + video.title);      System.out.println("Description: " + video.description);      System.out.println("Play URL: " + video.player.defaultUrl);    }  }}

PicasaAndroidSample.java

public final class PicasaAndroidSample extends ListActivity {...  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);...    gotAccount(false);  }  @Override  protected Dialog onCreateDialog(int id) {    switch (id) {      case DIALOG_ACCOUNTS:        AlertDialog.Builder builder = new AlertDialog.Builder(this);        builder.setTitle("Select a Google account");        final AccountManager manager = AccountManager.get(this);        final Account[] accounts = manager.getAccountsByType("com.google");        final int size = accounts.length;        String[] names = new String[size];        for (int i = 0; i < size; i++) {          names[i] = accounts[i].name;        }        builder.setItems(names, new DialogInterface.OnClickListener() {          public void onClick(DialogInterface dialog, int which) {            gotAccount(manager, accounts[which]);          }        });        return builder.create();    }    return null;  }  private void gotAccount(boolean tokenExpired) {    SharedPreferences settings = getSharedPreferences(PREF, 0);    String accountName = settings.getString("accountName", null);    if (accountName != null) {      AccountManager manager = AccountManager.get(this);      Account[] accounts = manager.getAccountsByType("com.google");      int size = accounts.length;      for (int i = 0; i < size; i++) {        Account account = accounts[i];        if (accountName.equals(account.name)) {          if (tokenExpired) {            manager.invalidateAuthToken("com.google", this.authToken);          }          gotAccount(manager, account);          return;        }      }    }    showDialog(DIALOG_ACCOUNTS);  }  private void gotAccount(final AccountManager manager, final Account account) {    SharedPreferences settings = getSharedPreferences(PREF, 0);    SharedPreferences.Editor editor = settings.edit();    editor.putString("accountName", account.name);    editor.commit();    new Thread() {      @Override      public void run() {        try {          final Bundle bundle =              manager.getAuthToken(account, AUTH_TOKEN_TYPE, true, null, null)                  .getResult();          runOnUiThread(new Runnable() {            public void run() {              try {                if (bundle.containsKey(AccountManager.KEY_INTENT)) {                  Intent intent =                      bundle.getParcelable(AccountManager.KEY_INTENT);                  int flags = intent.getFlags();                  flags &= ~Intent.FLAG_ACTIVITY_NEW_TASK;                  intent.setFlags(flags);                  startActivityForResult(intent, REQUEST_AUTHENTICATE);                } else if (bundle.containsKey(AccountManager.KEY_AUTHTOKEN)) {                  authenticatedClientLogin(                      bundle.getString(AccountManager.KEY_AUTHTOKEN));                }              } catch (Exception e) {                handleException(e);              }            }          });        } catch (Exception e) {          handleException(e);        }      }    }.start();  }  @Override  protected void onActivityResult(      int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    switch (requestCode) {      case REQUEST_AUTHENTICATE:        if (resultCode == RESULT_OK) {          gotAccount(false);        } else {          showDialog(DIALOG_ACCOUNTS);        }        break;    }  }  private void authenticatedClientLogin(String authToken) {    this.authToken = authToken;    ((GoogleHeaders) transport.defaultHeaders).setGoogleLogin(authToken);    authenticated();  }}