为此使用 Twitter4j 库并使用以下代码将 twitter 集成到您的应用程序中。
MainActivity.java
private TwitterApp mTwitter;
private static final String CONSUMER_KEY = "your consumer key";
private static final String CONSUMER_SECRET = "your consumer secret key";
private enum FROM {
TWITTER_POST, TWITTER_LOGIN
};
private enum MESSAGE {
SUCCESS, DUPLICATE, FAILED, CANCELLED
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mTwitter = new TwitterApp(this, CONSUMER_KEY, CONSUMER_SECRET);
}
public void onClick(View v) {
mTwitter.setListener(mTwLoginDialogListener);
mTwitter.resetAccessToken();
if (mTwitter.hasAccessToken() == true) {
try {
mTwitter.updateStatus(TwitterApp.MESSAGE);
postAsToast(FROM.TWITTER_POST, MESSAGE.SUCCESS);
} catch (Exception e) {
if (e.getMessage().toString().contains("duplicate")) {
postAsToast(FROM.TWITTER_POST, MESSAGE.DUPLICATE);
}
e.printStackTrace();
}
mTwitter.resetAccessToken();
} else {
mTwitter.authorize();
}
}
private void postAsToast(FROM twitterPost, MESSAGE success) {
switch (twitterPost) {
case TWITTER_LOGIN:
switch (success) {
case SUCCESS:
Toast.makeText(this, "Login Successful", Toast.LENGTH_LONG)
.show();
break;
case FAILED:
Toast.makeText(this, "Login Failed", Toast.LENGTH_LONG).show();
default:
break;
}
break;
case TWITTER_POST:
switch (success) {
case SUCCESS:
Toast.makeText(this, "Posted Successfully", Toast.LENGTH_LONG)
.show();
break;
case FAILED:
Toast.makeText(this, "Posting Failed", Toast.LENGTH_LONG)
.show();
break;
case DUPLICATE:
Toast.makeText(this,
"Posting Failed because of duplicate message...",
Toast.LENGTH_LONG).show();
default:
break;
}
break;
}
}
private TwDialogListener mTwLoginDialogListener = new TwDialogListener() {
@Override
public void onError(String value) {
postAsToast(FROM.TWITTER_LOGIN, MESSAGE.FAILED);
Log.e("TWITTER", value);
mTwitter.resetAccessToken();
}
@Override
public void onComplete(String value) {
try {
mTwitter.updateStatus(TwitterApp.MESSAGE);
postAsToast(FROM.TWITTER_POST, MESSAGE.SUCCESS);
} catch (Exception e) {
if (e.getMessage().toString().contains("duplicate")) {
postAsToast(FROM.TWITTER_POST, MESSAGE.DUPLICATE);
}
e.printStackTrace();
}
mTwitter.resetAccessToken();
}
};
将以下 3 类添加到新包“com.twitter.android”中
第 1 类：-（TwitterApp.java）
package com.twitter.android;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLDecoder;
import oauth.signpost.OAuthProvider;
import oauth.signpost.basic.DefaultOAuthProvider;
import oauth.signpost.commonshttp.CommonsHttpOAuthConsumer;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.User;
import twitter4j.http.AccessToken;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Handler;
import android.os.Message;
import android.view.Window;
public class TwitterApp {
private Twitter mTwitter;
private TwitterSession mSession;
private AccessToken mAccessToken;
private CommonsHttpOAuthConsumer mHttpOauthConsumer;
private OAuthProvider mHttpOauthprovider;
private String mConsumerKey;
private String mSecretKey;
private ProgressDialog mProgressDlg;
private TwDialogListener mListener;
private Activity context;
public static final String OAUTH_CALLBACK_SCHEME = "x-oauthflow-twitter";
public static final String OAUTH_CALLBACK_HOST = "callback";
public static final String CALLBACK_URL = OAUTH_CALLBACK_SCHEME + "://" + OAUTH_CALLBACK_HOST;
private static final String TWITTER_ACCESS_TOKEN_URL = "https://api.twitter.com/oauth/access_token";
private static final String TWITTER_AUTHORZE_URL = "https://api.twitter.com/oauth/authorize";
private static final String TWITTER_REQUEST_URL = "https://api.twitter.com/oauth/request_token";
public static final String MESSAGE = "Hello Everyone....";
public TwitterApp(Activity context, String consumerKey, String secretKey) {
this.context = context;
mTwitter = new TwitterFactory().getInstance();
mSession = new TwitterSession(context);
mProgressDlg = new ProgressDialog(context);
mProgressDlg.requestWindowFeature(Window.FEATURE_NO_TITLE);
mConsumerKey = consumerKey;
mSecretKey = secretKey;
mHttpOauthConsumer = new CommonsHttpOAuthConsumer(mConsumerKey,
mSecretKey);
String request_url=TWITTER_REQUEST_URL;
String access_token_url=TWITTER_ACCESS_TOKEN_URL;
String authorize_url=TWITTER_AUTHORZE_URL;
mHttpOauthprovider = new DefaultOAuthProvider(
request_url,
access_token_url,
authorize_url);
mAccessToken = mSession.getAccessToken();
configureToken();
}
public void setListener(TwDialogListener listener) {
mListener = listener;
}
@SuppressWarnings("deprecation")
private void configureToken() {
if (mAccessToken != null) {
mTwitter.setOAuthConsumer(mConsumerKey, mSecretKey);
mTwitter.setOAuthAccessToken(mAccessToken);
}
}
public boolean hasAccessToken() {
return (mAccessToken == null) ? false : true;
}
public void resetAccessToken() {
if (mAccessToken != null) {
mSession.resetAccessToken();
mAccessToken = null;
}
}
public String getUsername() {
return mSession.getUsername();
}
public void updateStatus(String status) throws Exception {
try {
mTwitter.updateStatus(status);
} catch (TwitterException e) {
throw e;
}
}
public void authorize() {
mProgressDlg.setMessage("Initializing ...");
mProgressDlg.show();
new Thread() {
@Override
public void run() {
String authUrl = "";
int what = 1;
try {
authUrl = mHttpOauthprovider.retrieveRequestToken(
mHttpOauthConsumer, CALLBACK_URL);
what = 0;
} catch (Exception e) {
e.printStackTrace();
}
mHandler.sendMessage(mHandler
.obtainMessage(what, 1, 0, authUrl));
}
}.start();
}
public void processToken(String callbackUrl) {
mProgressDlg.setMessage("Finalizing ...");
mProgressDlg.show();
final String verifier = getVerifier(callbackUrl);
new Thread() {
@Override
public void run() {
int what = 1;
try {
mHttpOauthprovider.retrieveAccessToken(mHttpOauthConsumer,
verifier);
mAccessToken = new AccessToken(
mHttpOauthConsumer.getToken(),
mHttpOauthConsumer.getTokenSecret());
configureToken();
User user = mTwitter.verifyCredentials();
mSession.storeAccessToken(mAccessToken, user.getName());
what = 0;
} catch (Exception e) {
e.printStackTrace();
}
mHandler.sendMessage(mHandler.obtainMessage(what, 2, 0));
}
}.start();
}
private String getVerifier(String callbackUrl) {
String verifier = "";
try {
callbackUrl = callbackUrl.replace("twitterapp", "http");
URL url = new URL(callbackUrl);
String query = url.getQuery();
String array[] = query.split("&");
for (String parameter : array) {
String v[] = parameter.split("=");
if (URLDecoder.decode(v[0]).equals(
oauth.signpost.OAuth.OAUTH_VERIFIER)) {
verifier = URLDecoder.decode(v[1]);
break;
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
}
return verifier;
}
private void showLoginDialog(String url) {
final TwDialogListener listener = new TwDialogListener() {
public void onComplete(String value) {
processToken(value);
}
public void onError(String value) {
mListener.onError("Failed opening authorization page");
}
};
new TwitterDialog(context, url, listener).show();
}
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
mProgressDlg.dismiss();
if (msg.what == 1) {
if (msg.arg1 == 1)
mListener.onError("Error getting request token");
else
mListener.onError("Error getting access token");
} else {
if (msg.arg1 == 1)
showLoginDialog((String) msg.obj);
else
mListener.onComplete("");
}
}
};
public interface TwDialogListener {
public void onComplete(String value);
public void onError(String value);
}
}
第 2 类：- (TwitterDialog.java)
package com.twitter.android;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.Display;
import android.view.ViewGroup;
import android.view.Window;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.twitter.android.TwitterApp.TwDialogListener;
public class TwitterDialog extends Dialog {
static final float[] DIMENSIONS_LANDSCAPE = { 460, 260 };
static final float[] DIMENSIONS_PORTRAIT = { 280, 420 };
static final FrameLayout.LayoutParams FILL = new FrameLayout.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.FILL_PARENT);
static final int MARGIN = 4;
static final int PADDING = 2;
private String mUrl;
private TwDialogListener mListener;
private ProgressDialog mSpinner;
private WebView mWebView;
private LinearLayout mContent;
private TextView mTitle;
private boolean progressDialogRunning = false;
public TwitterDialog(Context context, String url, TwDialogListener listener) {
super(context);
mUrl = url;
mListener = listener;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mSpinner = new ProgressDialog(getContext());
mSpinner.requestWindowFeature(Window.FEATURE_NO_TITLE);
mSpinner.setMessage("Loading...");
mContent = new LinearLayout(getContext());
mContent.setOrientation(LinearLayout.VERTICAL);
setUpTitle();
setUpWebView();
Display display = getWindow().getWindowManager().getDefaultDisplay();
final float scale = getContext().getResources().getDisplayMetrics().density;
float[] dimensions = (display.getWidth() < display.getHeight()) ? DIMENSIONS_PORTRAIT
: DIMENSIONS_LANDSCAPE;
addContentView(mContent, new FrameLayout.LayoutParams(
(int) (dimensions[0] * scale + 0.5f), (int) (dimensions[1]
* scale + 0.5f)));
}
private void setUpTitle() {
requestWindowFeature(Window.FEATURE_NO_TITLE);
Drawable icon = getContext().getResources().getDrawable(
R.drawable.twitter_icon);
mTitle = new TextView(getContext());
mTitle.setText("Twitter");
mTitle.setTextColor(Color.WHITE);
mTitle.setTypeface(Typeface.DEFAULT_BOLD);
mTitle.setBackgroundColor(0xFFbbd7e9);
mTitle.setPadding(MARGIN + PADDING, MARGIN, MARGIN, MARGIN);
mTitle.setCompoundDrawablePadding(MARGIN + PADDING);
mTitle.setCompoundDrawablesWithIntrinsicBounds(icon, null, null, null);
mContent.addView(mTitle);
}
private void setUpWebView() {
mWebView = new WebView(getContext());
mWebView.setVerticalScrollBarEnabled(false);
mWebView.setHorizontalScrollBarEnabled(false);
mWebView.setWebViewClient(new TwitterWebViewClient());
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.loadUrl(mUrl);
mWebView.setLayoutParams(FILL);
mContent.addView(mWebView);
}
private class TwitterWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith(TwitterApp.CALLBACK_URL)) {
mListener.onComplete(url);
TwitterDialog.this.dismiss();
return true;
} else if (url.startsWith("authorize")) {
return false;
}
return true;
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
mListener.onError(description);
TwitterDialog.this.dismiss();
}
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
mSpinner.show();
progressDialogRunning = true;
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
String title = mWebView.getTitle();
if (title != null && title.length() > 0) {
mTitle.setText(title);
}
progressDialogRunning = false;
mSpinner.dismiss();
}
}
@Override
protected void onStop() {
progressDialogRunning = false;
super.onStop();
}
public void onBackPressed() {
if(!progressDialogRunning){
TwitterDialog.this.dismiss();
}
}
}
第 3 类：- (TwitterSession.java)
package com.twitter.android;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.Context;
import twitter4j.http.AccessToken;
public class TwitterSession {
private SharedPreferences sharedPref;
private Editor editor;
private static final String TWEET_AUTH_KEY = "auth_key";
private static final String TWEET_AUTH_SECRET_KEY = "auth_secret_key";
private static final String TWEET_USER_NAME = "user_name";
private static final String SHARED = "Twitter_Preferences";
public TwitterSession(Context context) {
sharedPref = context.getSharedPreferences(SHARED, Context.MODE_PRIVATE);
editor = sharedPref.edit();
}
public void storeAccessToken(AccessToken accessToken, String username) {
editor.putString(TWEET_AUTH_KEY, accessToken.getToken());
editor.putString(TWEET_AUTH_SECRET_KEY, accessToken.getTokenSecret());
editor.putString(TWEET_USER_NAME, username);
editor.commit();
}
public void resetAccessToken() {
editor.putString(TWEET_AUTH_KEY, null);
editor.putString(TWEET_AUTH_SECRET_KEY, null);
editor.putString(TWEET_USER_NAME, null);
editor.commit();
}
public String getUsername() {
return sharedPref.getString(TWEET_USER_NAME, "");
}
public AccessToken getAccessToken() {
String token = sharedPref.getString(TWEET_AUTH_KEY, null);
String tokenSecret = sharedPref.getString(TWEET_AUTH_SECRET_KEY, null);
if (token != null && tokenSecret != null)
return new AccessToken(token, tokenSecret);
else
return null;
}
}
并将以下 Jar 文件作为参考库添加到您的项目中：-
1) 路标-commonshttp4-1.2.1.1.jar
2）signpost-core-1.2.1.1.jar
3) 路标-jetty6-1.2.1.1.jar
4) twitter4j-core-2.1.6.jar