我已经尝试了几天让我的应用程序以某种方式连接到 twitter 的 rest api v 1.1，但几乎没有任何效果，或者我无法很好地适应它来工作，两者之一。我已经从 twitter 开发者网站上找到了一个解释代码的教程，我尝试为我的应用程序实现它，但它一直给我一个奇怪的错误，并显示以下文本 "api.twitter.com" 。我不知道这是什么类型的错误，但我认为这与 http 请求有关，因为我看到它没有通过这行代码“HttpResponse response = client.execute(post);”。我希望我能得到一些反馈，或者一些想法，我真的有点麻烦。提前致谢。
这是它的代码：
package com.gtware.android.twitter.restapi;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Date;
import java.util.UUID;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class PostActivity extends Activity {
public static final String ENCODING = "UTF-8";
private static final String postURL = "https://api.twitter.com/1.1/statuses/update.json";
/ /Keys & Secrets
private static final String consumerKey = "this is where i enter my consumer key ";
private static final String consumerSecret = "this is where i enter my consumer secret ";
private static final String accessToken = "this is where i enter my accestoken";
private static final String accessTokenSecret = "this is where i enter my accestokenSecret";
//OAuth Header Keys
private static final String oauth_consumer_key = "oauth_consumer_key";
private static final String oauth_nonce = "oauth_nonce";
private static final String oauth_signature = "oauth_signature";
private static final String oauth_signature_method = "oauth_signature_method";
private static final String oauth_timestamp = "oauth_timestamp";
private static final String oauth_token = "oauth_token";
private static final String oauth_version = "oauth_version";
private static final String status = "status";
private static final String include_entities="include_entities";
private static final String x="true";
private EditText tweetEditor;
private Button postButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.post_main);
postButton = (Button)findViewById(R.id.postButton);
tweetEditor = (EditText)findViewById(R.id.tweetEditor);
tweetEditor.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
if(tweetEditor.getText().length() == 0) {
postButton.setEnabled(false);
}
else {
postButton.setEnabled(true);
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) { }
public void afterTextChanged(Editable s) { }
});
}
private void alertUser(String str) {
new AlertDialog.Builder(this)
.setMessage(str)
.setNeutralButton("OK", null)
.show();
}
public void post(View button) {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(postURL);
try {
String message = tweetEditor.getText().toString();
addAuthorizationHeader(message, post);
post.setEntity(new StringEntity(percentEncode(status) + "=" + percentEncode(message)));
HttpResponse response = client.execute(post);
parsePostResponse(response);
}
catch(Exception e) {
Log.e(PostActivity.class.getName(), e.getMessage());
alertUser("Error: " + e.getMessage());
}
}
private void addAuthorizationHeader(String tweet, HttpRequestBase request) throws Exception {
request.setHeader("Content-Type", "application/x-www-form-urlencoded");
String nonce = base64Encode((UUID.randomUUID().toString().replaceAll("-", "").replace("=","").getBytes()));
nonce=nonce.substring(0, nonce.length()-1);
String signatureMethod = "HMAC-SHA1";
String timeStamp = String.valueOf(new Date().getTime() / 1000);
String version = "1.0";
//Generating the Parameter String:
//Add request parameters and status message alphabetically (DO NOT ADD SIGNATURE)
//Encode keys and values while adding
//Insert = character between each key and its value
//Add an ampersand (&) to the end if there are more parameters
String parameterString =
percentEncode(include_entities)+"="+percentEncode(x)+"&"+
percentEncode(oauth_consumer_key) + "=" + percentEncode(consumerKey) + "&" +
percentEncode(oauth_nonce) + "=" + percentEncode(nonce) + "&" +
percentEncode(oauth_signature_method) + "=" + percentEncode(signatureMethod) + "&" +
percentEncode(oauth_timestamp) + "=" + percentEncode(timeStamp) + "&" +
percentEncode(oauth_token) + "=" + percentEncode(accessToken) + "&" +
percentEncode(oauth_version) + "=" + percentEncode(version) + "&" +
percentEncode(status) + "=" + percentEncode(tweet);
Log.e("This is the parameterString",parameterString);
Log.e("This is the nonce variable",nonce);
//Generate the SignatureBaseString
String signatureBaseString = "POST&" + percentEncode(postURL) + "&" + percentEncode(parameterString);
Log.e("Signature base looks like this ",signatureBaseString);
//Generate the SigningKey
String signingKey = percentEncode(consumerSecret) + "&" + percentEncode(accessTokenSecret);
Log.e("Signing key looks like this ",signingKey);
//Generate HMAC-MD5 signature
String signature = generateHmacSHA1(signingKey, signatureBaseString);
Log.e("Signature looks like so ",signature);
//Build the HTTP Header
String oauthHeader =
"OAuth " +
percentEncode(oauth_consumer_key) + "=\"" + percentEncode(consumerKey) + "\", " +
percentEncode(oauth_nonce) + "=\"" + percentEncode(nonce) + "\", " +
percentEncode(oauth_signature) + "=\"" + percentEncode(signature) + "\", " +
percentEncode(oauth_signature_method) + "=\"" + percentEncode(signatureMethod) + "\", " +
percentEncode(oauth_timestamp) + "=\"" + percentEncode(timeStamp) + "\", " +
percentEncode(oauth_token) + "=\"" + percentEncode(accessToken) + "\", " +
percentEncode(oauth_version) + "=\"" + percentEncode(version) + "\"";
Log.e("Header looks like this ",oauthHeader);
request.addHeader("Authorization", oauthHeader);
}
private String generateHmacSHA1(String key, String value) throws Exception {
SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(ENCODING), "HmacSHA1");
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(keySpec);
byte[] result = mac.doFinal(value.getBytes(ENCODING));
return base64Encode(result);
}
private void parsePostResponse(HttpResponse response) throws IllegalStateException, IOException, JSONException {
StringBuilder sb = getResponseBody(response);
if(response.getStatusLine().getStatusCode() == 200) {
alertUser("Tweet Successful!\nID: " + new JSONObject(sb.toString()).get("id"));
}
//Not OK
else {
Log.e(PostActivity.class.getName(), "Response Code: " + response.getStatusLine().getStatusCode() + "\nResponse: " + sb.toString());
alertUser("Error Code: " + response.getStatusLine().getStatusCode() + "\n" + new JSONObject(sb.toString()).getString("error"));
}
}
private static StringBuilder getResponseBody(HttpResponse response) throws IllegalStateException, IOException {
InputStream is = response.getEntity().getContent();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
while((line = br.readLine()) != null) {
sb.append(line);
}
br.close();
return sb;
}
private String percentEncode(String s) throws UnsupportedEncodingException {
//This could be done faster with more hand-crafted code.
return URLEncoder.encode(s, ENCODING)
// OAuth encodes some characters differently:
.replace("+", "%20").replace("*", "%2A")
.replace("%7E", "~");
}
private static String base64Encode(byte[] array) {
return Base64.encodeToString(array, Base64.NO_WRAP);
}
}