目前我需要制作一个可以列出所有 Google Drive 文件的应用程序。我已经完成了帐户选择和 oauth 过程,并且已经获得了令牌。但是当我尝试使用 API 调用列出我在 Google Drive 上的所有文件(通过使用 drive.files.list)时,我没有得到任何结果,应该保存所有文件的文件数组列表仍然是空的。
我也有错误:
java.net.unknownHostException www.googleapis.com 无法解决
这是我的代码:
SharedPreferences settings = getSharedPreferences(PREF, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString("accountName", got.name);
editor.commit();
account=got;
amf=accMgr.getAuthToken(account, authTokenType, true,
new AccountManagerCallback<Bundle>(){
public void run(AccountManagerFuture<Bundle> arg0) {
try {
Bundle result;
Intent i;
String token;
Drive a;
result = arg0.getResult();
if (result.containsKey(accMgr.KEY_INTENT)) {
i = (Intent)result.get(accMgr.KEY_INTENT);
if (i.toString().contains("GrantCredentialsPermissionActivity")) {
// Will have to wait for the user to accept
// the request therefore this will have to
// run in a foreground application
cbt.startActivity(i);
} else {
cbt.startActivity(i);
}
}
else if (result.containsKey(accMgr.KEY_AUTHTOKEN)) {
accessProtectedResource.setAccessToken(result
.getString(accMgr.KEY_AUTHTOKEN));
buildService(result
.getString(accMgr.KEY_AUTHTOKEN),API_KEY);
/*else {
token = (String)result.get(AccountManager.KEY_AUTHTOKEN);*/
/*
* work with token
*/
// Remember to invalidate the token if the web service rejects it
// if(response.isTokenInvalid()){
// accMgr.invalidateAuthToken(authTokenType, token);
// }
}
} catch (OperationCanceledException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (AuthenticatorException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}, handler);
}
private void buildService(final String authToken, final String ApiKey) {
HttpTransport httpTransport = new NetHttpTransport();
JacksonFactory jsonFactory = new JacksonFactory();
Drive.Builder b = new Drive.Builder(httpTransport, jsonFactory, null);
b.setJsonHttpRequestInitializer(new JsonHttpRequestInitializer() {
@Override
public void initialize(JsonHttpRequest request) throws IOException {
DriveRequest driveRequest = (DriveRequest) request;
driveRequest.setPrettyPrint(true);
driveRequest.setKey(ApiKey);
driveRequest.setOauthToken(authToken);
}
});
System.out.println(authToken);
service= b.build();
List<File> a=new ArrayList<File>();
try {
a = retrieveDriveFile(service);
System.out.println(a.size());
File c=a.get(0);
TextView ad=(TextView) findViewById(R.id.test);
ad.setText(c.getOriginalFilename());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public List<File> retrieveDriveFile(Drive service) throws IOException{
List<File> result = new ArrayList<File>();
Files.List request = service.files().list();
do {
try {
FileList files = request.execute();
result.addAll(files.getItems());
request.setPageToken(files.getNextPageToken());
} catch (IOException e) {
System.out.println("An error ssoccurred: " + e);
request.setPageToken(null);
}
} while (request.getPageToken() != null &&
request.getPageToken().length() > 0);
return result;
}