我原以为使用Tumblr API上传图片会很容易，但实际上并不是这样。（编辑现在已经容易了，请看本条目末尾的编辑2）
我的应用程序应该将一张图片上传到tumblr。我更喜欢从服务中完成这个任务，但现在我使用一个活动来完成上传，上传完成后活动就关闭了。在OnCreate()中，用户被认证：
consumer = new CommonsHttpOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
// It uses this signature by default
// consumer.setMessageSigner(new HmacSha1MessageSigner());
provider = new CommonsHttpOAuthProvider(REQUEST_TOKEN_URL,ACCESS_TOKEN_URL,AUTH_URL);
String authUrl;
try
{
authUrl = provider.retrieveRequestToken(consumer, CALLBACK_URL);
Log.d(TAG, "Auth url:" + authUrl);
startActivity(new Intent("android.intent.action.VIEW", Uri.parse(authUrl)));
}
这会打开一个浏览器活动，用户可以在其中添加用户名和密码，然后应用程序返回到活动（这也是我必须使用活动的原因，我不知道如何从服务中执行此操作）。
从浏览器返回后，数据被提取：
Uri uri = context.getIntent().getData();
if (uri != null && uri.toString().startsWith(CALLBACK_URL))
{
Log.d(TAG, "uri!=null");
String verifier = uri.getQueryParameter("oauth_verifier");
Log.d(TAG, "verifier"+verifier);
try
{
provider.setOAuth10a(true);
provider.retrieveAccessToken(consumer, verifier);
Log.d(TAG, "try");
}
catch (Exception e)
{
Log.e(TAG, e.toString());
e.printStackTrace();
}
OAUTH_TOKEN = consumer.getToken();
OAUTH_SECRET = consumer.getTokenSecret();
这两个片段大部分是我从这里获得的，它们运行良好。
有了这些令牌，我现在可以尝试在tumblr上放置数据。当我尝试添加文本时，使用以下方法可以正常工作：
private void createText()
{
if(!OAUTH_TOKEN.equals(""))
{
HttpContext context = new BasicHttpContext();
HttpPost request = new HttpPost("http://api.tumblr.com/v2/blog/" + blogname + ".tumblr.com/post");
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("type", "text"));
nameValuePairs.add(new BasicNameValuePair("body", "this is just a test"));
try
{
request.setEntity(new UrlEncodedFormEntity(nameValuePairs));
}
catch (UnsupportedEncodingException e1)
{
Log.e(TAG, e1.toString());
e1.printStackTrace();
}
if (consumer == null)
{
consumer = new CommonsHttpOAuthConsumer(OAuthConstants.TUMBR_CONSUMERKEY, OAuthConstants.TUMBR_SECRETKEY);
}
if (OAUTH_TOKEN == null || OAUTH_SECRET == null)
{
Log.e(TAG, "Not logged in error");
}
consumer.setTokenWithSecret(OAUTH_TOKEN, OAUTH_SECRET);
try
{
consumer.sign(request);
}
catch (OAuthMessageSignerException e)
{
}
catch (OAuthExpectationFailedException e)
{
}
catch (OAuthCommunicationException e)
{
}
HttpClient client = new DefaultHttpClient();
//finally execute this request
try
{
HttpResponse response = client.execute(request, context);
HttpEntity responseEntity = response.getEntity();
if (responseEntity != null)
{
Log.d(TAG, "responseEntety!=null");
try
{
Log.d(TAG, EntityUtils.toString(responseEntity));
}
catch (ParseException e)
{
e.printStackTrace();
Log.e(TAG, e.toString());
}
catch (IOException e)
{
e.printStackTrace();
Log.e(TAG, e.toString());
} // gives me {"meta":{"status":401,"msg":"Not Authorized"},"response":[]} when I try to upload a photo
}
else
{
Log.d(TAG, "responseEntety==null");
}
}
catch (ClientProtocolException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
PostToTumblr.this.finish();
}
正如您在这里所看到的http://www.tumblr.com/blog/snapnowandroid（至少目前是这样），文本“this is just a test”已发布。
然而，当我尝试发布图片时，出现了奇怪的情况。现在我已经查过了，显然这是Tumblr API的一个众所周知的问题，已经在这里进行了广泛讨论，并且有些人已经在其他编程语言中解决了这个问题（例如这里），但我一直无法重复那些成功。
该方法的结构与上述可行的方法完全相同，只是nameValuePairs不同。
该方法接收一个名为photo的Bitmap变量：
private void uploadToTumblr(Bitmap photo)
这个位图被转换成了一个数组：
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] bytes = stream.toByteArray();
nameValuePairs被填充如下：
nameValuePairs.add(new BasicNameValuePair(URLEncoder.encode("type", enc), URLEncoder.encode("photo", enc)));
nameValuePairs.add(new BasicNameValuePair(URLEncoder.encode("caption", enc), URLEncoder.encode(text, enc)));
nameValuePairs.add(new BasicNameValuePair("data", Base64.encodeToString(bytes, Base64.URL_SAFE)));
这是从tumblr api返回的结果：{"meta":{"status":400,"msg":"Bad Request"},"response":{"errors":["Error uploading photo."]}}
我已经按照this article中所述以不同方式对图片进行编码，但没有任何变化。
//http://www.coderanch.com/t/526487/java/java/Java-Byte-Hex-String
final char[] hexArray = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
char[] hexChars = new char[bytes.length * 3];
int v;
for ( int j = 0; j < bytes.length; j++ )
{
v = bytes[j] & 0xFF;
hexChars[j * 3] = '%';
hexChars[j * 3 + 1] = hexArray[v >>> 4];
hexChars[j * 3 + 2] = hexArray[v & 0x0F];
}
String s = new String(hexChars);
s = URLEncoder.encode(s, enc);
nameValuePairs.add(new BasicNameValuePair(URLEncoder.encode("data", enc), s));
这里是完整的方法（不包括十六进制编码）：
private void uploadToTumblr(Bitmap photo)
{
if(!OAUTH_TOKEN.equals(""))
{
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] bytes = stream.toByteArray();
String text ="SNAP";
HttpContext context = new BasicHttpContext();
HttpPost request = new HttpPost("http://api.tumblr.com/v2/blog/" + blogname + ".tumblr.com/post");
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
String enc = "UTF-8";
try
{
nameValuePairs.add(new BasicNameValuePair(URLEncoder.encode("type", enc), URLEncoder.encode("photo", enc)));
nameValuePairs.add(new BasicNameValuePair(URLEncoder.encode("caption", enc), URLEncoder.encode(text, enc)));
nameValuePairs.add(new BasicNameValuePair("data", Base64.encodeToString(bytes, Base64.URL_SAFE)));
}
catch (UnsupportedEncodingException e2)
{
Log.e(TAG, e2.toString());
e2.printStackTrace();
}
try
{
request.setEntity(new UrlEncodedFormEntity(nameValuePairs));
}
catch (UnsupportedEncodingException e1)
{
Log.e(TAG, e1.toString());
e1.printStackTrace();
}
if (consumer == null)
{
consumer = new CommonsHttpOAuthConsumer(OAuthConstants.TUMBR_CONSUMERKEY, OAuthConstants.TUMBR_SECRETKEY);
}
if (OAUTH_TOKEN == null || OAUTH_SECRET == null)
{
//throw new LoginErrorException(LoginErrorException.NOT_LOGGED_IN);
Log.e(TAG, "Not logged in error");
}
consumer.setTokenWithSecret(OAUTH_TOKEN, OAUTH_SECRET);
try
{
consumer.sign(request);
}
catch (OAuthMessageSignerException e)
{
}
catch (OAuthExpectationFailedException e)
{
}
catch (OAuthCommunicationException e)
{
}
HttpClient client = new DefaultHttpClient();
//finally execute this request
try
{
HttpResponse response = client.execute(request, context);
HttpEntity responseEntity = response.getEntity();
if (responseEntity != null)
{
Log.d(TAG, "responseEntety!=null");
try
{
Log.d(TAG, EntityUtils.toString(responseEntity));
}
catch (ParseException e)
{
e.printStackTrace();
Log.e(TAG, e.toString());
}
catch (IOException e)
{
e.printStackTrace();
Log.e(TAG, e.toString());
}
}
else
{
Log.d(TAG, "responseEntety==null");
}
}
catch (ClientProtocolException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else
{
Log.d(TAG, "upload imposble... Toklen not set");
}
PostToTumblr.this.finish();
}
现在，虽然有几件事情让我不满意（例如使用活动而不是服务），但这里的大问题显然是上传图片的问题。我绝不是第一个遇到这个问题的人，那么有没有人能够在Java中解决这个问题呢？
编辑1
尚未解决手头的问题，但创建了一个解决方法，可能对于遇到相同问题的人很有用。Tumblr提供通过邮件发布，您可以编程Android以后台发送电子邮件，如此处所示。这非常有效，但您需要要求用户提供其邮件帐户数据和Tumblr邮件地址才能发布。
编辑2
多年过去了，使用电子邮件已不再是简单易行的方式。有了jumblr，终于有了一个适用于Android的优秀Java API。OAuth认证并不好玩（它从来都不是），但一旦你克服了这个问题，它就很棒。现在，技术上讲如何进行身份验证并不属于这里，但这是我的过长的问题，所以我将在此粘贴一些代码，如果您对此不感兴趣，请跳过它。
这使用了一个名为jumblr-0.0.10-jar-with-dependencies.jar的jar文件。
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.util.Log;
import com.tumblr.jumblr.JumblrClient;
import com.tumblr.jumblr.request.RequestBuilder;
import com.tumblr.jumblr.types.Blog;
import com.tumblr.jumblr.types.User;
import org.scribe.builder.ServiceBuilder;
import org.scribe.builder.api.TumblrApi;
import org.scribe.model.Token;
import org.scribe.model.Verifier;
import org.scribe.oauth.OAuthService;
import java.io.File;
public class Tumblr
{
private static final String PROTECTED_RESOURCE_URL = "http://api.tumblr.com/v2/user/info";
static OAuthService service;
static Token requestToken=null;
public static void share(final Activity ctx, File file)
{
Thread tt = new Thread(new Runnable()
{
@Override
public void run()
{
JumblrClient client = new JumblrClient(Tumblr_Constants.CONSUMER_KEY, Tumblr_Constants.CONSUMER_SECRET);
RequestBuilder requestBuilder = client.getRequestBuilder();
requestBuilder.setConsumer(Tumblr_Constants.CONSUMER_KEY, Tumblr_Constants.CONSUMER_SECRET);
SharedPreferences settings = ctx.getSharedPreferences("TumblrData", 0);
String oauthToken=settings.getString("OauthToken", "");
String oauthTokenSecret=settings.getString("OauthSecret", "");
if(oauthToken.equals("") || oauthTokenSecret.equals(""))
{
authenticate(ctx);
while(WebViewFragment.verifier.equals(""))
{
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
String v = WebViewFragment.verifier;
Token accessToken = authenticatefurther(v);
SharedPreferences.Editor edit = settings.edit();
edit.putString("OauthToken", accessToken.getToken());
edit.putString("OauthSecret", accessToken.getSecret());
edit.commit();
oauthToken=settings.getString("OauthToken", "");
oauthTokenSecret=settings.getString("OauthSecret", "");
}
if(!oauthToken.equals("") && !oauthTokenSecret.equals(""))
{
client.setToken(oauthToken, oauthTokenSecret);
User user = client.user();
System.out.println(user.getName());
for (Blog blog : user.getBlogs()) {
Log.d("TUMBLR", blog.getTitle());
}
}
}
});
tt.start();
}
private static void authenticate(Context ctx) {
service = new ServiceBuilder()
.provider( TumblrApi.class )
.apiKey(Tumblr_Constants.CONSUMER_KEY)
.apiSecret(Tumblr_Constants.CONSUMER_SECRET)
.callback("snapnao://snapnao.de/ok") // OOB forbidden. We need an url and the better is on the tumblr website !
.build();
Log.d("TUMBLR", "=== Tumblr's OAuth Workflow ===" );
System.out.println();
// Obtain the Request Token
Log.d("TUMBLR", "Fetching the Request Token...");
requestToken = service.getRequestToken();
Log.d("TUMBLR", "Got the Request Token!");
Log.d("TUMBLR", "");
Log.d("TUMBLR", "Now go and authorize Scribe here:" );
Log.d("TUMBLR", service.getAuthorizationUrl( requestToken ) );
String url = service.getAuthorizationUrl(requestToken);
Intent i = new Intent(ctx, WebViewFragment.class);
i.putExtra("url", url);
ctx.startActivity(i);
}
private static Token authenticatefurther(String v)
{
Token accessToken = null;
Log.d("TUMBLR", "And paste the verifier here");
Log.d("TUMBLR", ">>");
Verifier verifier = new Verifier( v);
Log.d("TUMBLR", "");
// Trade the Request Token and Verfier for the Access Token
Log.d("TUMBLR", "Trading the Request Token for an Access Token...");
accessToken = service.getAccessToken( requestToken ,
verifier );
Log.d("TUMBLR", "Got the Access Token!");
Log.d("TUMBLR", "(if your curious it looks like this: " + accessToken + " )");
Log.d("TUMBLR", "");
return accessToken;
}
}
WebViewFragement看起来像这样：
import android.app.Activity;
import android.graphics.Bitmap;
import android.net.http.SslError;
import android.os.Bundle;
import android.util.Log;
import android.webkit.SslErrorHandler;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class WebViewFragment extends Activity
{
public static String verifier="";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.webviewfragment);
String url = getIntent().getStringExtra("url");
Log.d("TUMBLR", "webview-> "+url);
WebView view = (WebView) findViewById(R.id.webView);
view.setWebViewClient(
new SSLTolerentWebViewClient()
);
view.getSettings().setJavaScriptEnabled(true);
view.loadUrl(url);
}
// SSL Error Tolerant Web View Client
private class SSLTolerentWebViewClient extends WebViewClient {
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
handler.proceed(); // Ignore SSL certificate errors
}
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
Log.d("TUMBLR", "+++++"+url);
if(url.contains("oauth_verifier="))
{
String[] x = url.split("oauth_verifier=");
verifier=x[1].replace("#_=_", "");
WebViewFragment.this.finish();
}
}
}
}
data而不是source，但你发送的是一个字符串而不是一个数组。如果你只上传一张照片，请尝试使用编码字符串的source或一个带有一个编码字符串元素的数组作为data。 - Ally