Twitter模塊開發

 Twitter模塊開發

關於Twitter這一塊，自發這篇博文以後有不少人問我，有的驗證成功了不跳轉，或者其它緣由什麼的

=======我看了一下，這篇博文裏面有寫呀，下面以紅色粗體文字註明一下

 Twitter和Facebook，就相似於國內的微博，或者分享功能，點擊某個按鈕，出來一個提示框，能夠分享到某些地方，這裏實現的就是分享到Twitter，固然得要使用代理，由於這是給老外作的，因此得符合他們的習慣

先說一下實現的功能吧，首先運行的時候，會檢查是否登錄twitter（經過SharedPreference文件保存登錄狀態），若是沒有登錄的話會跳轉到twitter的登錄認證頁面，提示用戶輸入用戶名和密碼，這些就是OAuth認證的步驟，不懂的看這兒

http://blog.csdn.net/djy1992/article/details/9378035

作過新浪微博的都應該知道，首先要申請成爲開發者，建立本身的應用，而後會給你一些好比Consumer key和Consumer secret之類的東西，這些東西要先記下來，代碼裏面要用到的，其他的不囉嗦了，只是要注意一點，建立Twitter應用的時候千萬不能忘了填那個Callback URL，我當初就沒填，結果整了幾天都整不出來結果，也算是個人一點經驗吧，下面貼代碼，以便於之後查閱

首先咱們要用到Twitter封閉好的一些包，這裏用到兩個twitter4j-core-android和twitter4j-media-support-android，百度一下就出來了

如下是工程目錄結構

package  com.twitter;

public class  CONST {
public static final  String CONSUMER_KEY  = " IFkj4coaZ9F9Ngfoe1LFuQ " ;
public static final  String CONSUMER_SECRET  = " HN2NfE4mtL7OqJaUirWfRnK9XKhyWG2vZmAj6AFwfJ8 " ;
public static final  String REQUEST_TOKEN_URL  = " https://api.twitter.com/oauth/request_token " ;
public static final  String ACCESS_TOKEN_URL  = " https://api.twitter.com/oauth/access_token " ;
public static final  String CALLBACK_URL  = " https://api.twitter.com/oauth/authorize " ;
public static final  String TWITPIC_API_KEY  = " a77709ebb6c51de0e77f723751a5f9a4 " ;
}

下面是Twitter類（主類）

package  com.twitter;

import  java.io.IOException;
import  java.io.InputStream;

import  twitter4j.TwitterFactory;
import  twitter4j.conf.ConfigurationBuilder;
import  android.app.Activity;
import  android.app.ProgressDialog;
import  android.content.Context;
import  android.content.Intent;
import  android.content.SharedPreferences;
import  android.content.res.AssetManager;
import  android.os.AsyncTask;
import  android.os.Bundle;
import  android.text.Editable;
import  android.text.TextWatcher;
import  android.util.Log;
import  android.view.View;
import  android.view.Window;
import  android.view.View.OnClickListener;
import  android.widget.Button;
import  android.widget.EditText;
import  android.widget.TextView;
import  android.widget.Toast;

public class  Twitter  extends  Activity {
EditText et_content; //  評論內容
EditText et_des; //  圖片描述
TextView tv_num; //  剩餘字數
Button btn_send; //  發送按鈕

int  num  = 140 ; //  定義總字數

ProgressDialog progressDialog; //  當點擊發送的時候顯示此進度條

SharedPreferences spf;
TwitterConnect tc; //  定義一個twitter鏈接對象
boolean  connectionStatus  = false ; //  定義當前的鏈接狀態爲false

String content;
String describle;

@Override
public void  onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.twitter);
tc  = new  TwitterConnect( this );
spf  =  getSharedPreferences( " bravesoft " , Context.MODE_PRIVATE);
et_content  =  (EditText) findViewById(R.id.et_content);
et_des  =  (EditText) findViewById(R.id.et_des);
tv_num  =  (TextView) findViewById(R.id.tv_num);
tv_num.setText( " 140 " );

progressDialog  = new  ProgressDialog( this );
progressDialog.setTitle( " 正在發送... " );
progressDialog.setMessage( " 正在發送，請稍候... " );

et_content.addTextChangedListener( new  TextWatcher() {
private  CharSequence temp;
private int  selectionStart;
private int  selectionEnd;

@Override
public void  onTextChanged(CharSequence s,  int  start,  int  before,
int  count) {
temp  =  s; //  顯示當前輸入框中的全部內容
}

@Override
public void  beforeTextChanged(CharSequence s,  int  start,  int  count,
int  after) {
}

@Override
public void  afterTextChanged(Editable s) {
int  number  =  num  -  s.length();
tv_num.setText( "" +  number);
selectionStart  =  et_content.getSelectionStart();
selectionEnd  =  et_content.getSelectionEnd();
if  (temp.length()  >  num) {
s.delete(selectionStart  - 1 , selectionEnd);
int  tempSelection  =  selectionStart;
et_content.setText(s);
et_content.setSelection(tempSelection); //  設置光標在最後
}
}
});
btn_send  =  (Button) findViewById(R.id.btn_send);
connectionStatus  =  spf.getBoolean( " connection_tatus " ,  false );
btn_send.setOnClickListener( new  OnClickListener() {

@Override
public void  onClick(View v) {
content  =  et_content.getText().toString(); //  獲得評論內容
describle  =  et_des.getText().toString(); //  獲得圖片描述內容
if  (connectionStatus) { //  若是用戶處於登錄狀態，獲取用戶頭像跟name
progressDialog.show();
GetUserInfoTask getUserInfoTask  = new  GetUserInfoTask();
getUserInfoTask.execute( "" );
}
}
});

if  ( ! connectionStatus) {
btn_send.setEnabled( false );
sendMessage();
}

}

/**
* 若是用戶處於登錄狀態，獲取用戶頭像跟name
* 
*  @author  Administrator
* 
*/
class  GetUserInfoTask  extends  AsyncTask < String, Integer, String >  {

@Override
protected  String doInBackground(String... params) {
String result  = "" ;
ConfigurationBuilder confBuild  = new  ConfigurationBuilder();
confBuild.setOAuthConsumerKey(CONST.CONSUMER_KEY);
confBuild.setOAuthConsumerSecret(CONST.CONSUMER_SECRET);
confBuild.setOAuthAccessToken(spf.getString( " oauth_token " ,  "" ));
confBuild.setOAuthAccessTokenSecret(spf.getString(
" oauth_token_secret " ,  "" ));
twitter4j.conf.Configuration config  =  confBuild.build();
if  (TwitterConnect.twitter  != null )
TwitterConnect.twitter.shutdown();
TwitterConnect.twitter  = new  TwitterFactory(config).getInstance();
InputStream input  = null ;
try  {
TwitterConnect.accessToken  =  TwitterConnect.twitter
.getOAuthAccessToken();
boolean  bTest  = false ;
AssetManager am  =  getAssets();
try  {
input  =  am.open( " btn_dokusya_toukou.png " );
}  catch  (IOException e) {
e.printStackTrace();
}

if  (tc  == null ) {
tc  = new  TwitterConnect(Twitter. this );
}
bTest  =  tc.TwitterContribute(content, input, describle);

if  (bTest) {
result  = " ok " ;
}  else  {
result  = " failure " ;
}
}  catch  (Exception e) {

}
return  result;
}

@Override
protected void  onPostExecute(String result) {
super .onPostExecute(result);
if  (progressDialog.isShowing()) {
progressDialog.dismiss();
}
if  (result.equals( " ok " )) {
Toast.makeText(Twitter. this ,  " 發送成功 " , Toast.LENGTH_LONG).show();
}  else  {
Toast.makeText(Twitter. this ,  " 發送失敗 " , Toast.LENGTH_LONG).show();
}
}

}

public void  sendMessage() {
new  Send().start();
}

class  Send  extends  Thread {
@Override
public void  run() {
super .run();
try  {
Thread.sleep( 3000 );
}  catch  (InterruptedException e) {
e.printStackTrace();
}
Intent intent  = new  Intent(Twitter. this , TwitterLoginBrowser. class );
startActivityForResult(intent,  1 );
}
}

@Override
protected void  onActivityResult( int  requestCode,  int  resultCode, Intent data) {
super .onActivityResult(requestCode, resultCode, data);
if  (requestCode  == 1 ) {
if  (resultCode  == 1 ) { //  表示從TwitterLoginBrowser返回
connectionStatus  =  spf.getBoolean( " connection_tatus " ,  false );
if  (connectionStatus) {
btn_send.setEnabled( true );
}
}
}
}
}

TwitterConnect類

package  com.twitter;

import  java.io.IOException;
import  java.io.InputStream;
import  java.net.URL;

import  twitter4j.Status;
import  twitter4j.Twitter;
import  twitter4j.TwitterException;
import  twitter4j.TwitterFactory;
import  twitter4j.auth.AccessToken;
import  twitter4j.auth.RequestToken;
import  twitter4j.conf.Configuration;
import  twitter4j.conf.ConfigurationBuilder;
import  twitter4j.media.ImageUpload;
import  twitter4j.media.ImageUploadFactory;
import  twitter4j.media.MediaProvider;
import  android.content.Context;
import  android.graphics.Bitmap;
import  android.graphics.BitmapFactory;

public class  TwitterConnect {
Context context;
public static  Twitter twitter;
public static  RequestToken requestToken;
public static  AccessToken accessToken;

public  TwitterConnect(Context context) {
this .context  =  context;
twitter  = new  TwitterFactory().getInstance();
}

public  String twitterLoginOAuth() {
twitter.setOAuthConsumer(CONST.CONSUMER_KEY, CONST.CONSUMER_SECRET);
try  {
requestToken  =  twitter.getOAuthRequestToken();
return  requestToken.getAuthenticationURL()  + " &force_login=true " ;
}  catch  (TwitterException e) {
e.printStackTrace();
return " http://www.baidu.com " ;
}
//  已經獲得臨時訪問令牌
//  Request token=7HMpOfNr5ev1kjcW036mDI1hpvycbb1sRkKK3r6Ax30
//  Request token secret=FAhiBFX04lbQhme392htH1LgL8hQxm2p0IJ5Kzlofk
//  url= http://api.twitter.com/oauth/authenticate?oauth_token=svrKsiu1ArJ7h24RvHPHeNnzfXqLIebRY7uefydmB9k
}

//  獲得用戶名
public  String getUserName() {
try  {
return  twitter.showUser(accessToken.getUserId()).getName();
}  catch  (Exception e) {
return "" ;
}
}

//  獲得用戶頭像
public  Bitmap getUserImage(String userImageUrl) {
Bitmap image  = null ;
try  {
URL url  = new  URL(userImageUrl);
image  =  BitmapFactory.decodeStream(url.openStream());
}  catch  (Exception e) {
e.printStackTrace();
}
return  image;
}

/**
* 
*  @param  text
* 評論內容
*  @param  input
* 圖片的一個InputStream
*  @param  description
* 圖片描述
*  @return
*/
public boolean  TwitterContribute(String text, InputStream input,
String description) {
boolean  isOk  = false ;
Configuration config  = null ;
ImageUpload uploads  = null ;
try  {
Status status  = null ;
if  (input  != null ) {
if  (config  == null ) {
ConfigurationBuilder confBuild  = new  ConfigurationBuilder();
confBuild.setOAuthConsumerKey(CONST.CONSUMER_KEY);
confBuild.setOAuthConsumerSecret(CONST.CONSUMER_SECRET);
confBuild.setOAuthAccessToken(accessToken.getToken());
confBuild.setOAuthAccessTokenSecret(accessToken
.getTokenSecret());
confBuild.setMediaProviderAPIKey(CONST.TWITPIC_API_KEY);
//  發送圖片和對圖片的描述
config  =  confBuild.build();
uploads  = new  ImageUploadFactory(config)
.getInstance(MediaProvider.TWITPIC);
}
String uploadre  = "" ;
uploadre  =  uploads.upload( " " , input, description);
System.out.println( " uploadre " +  uploadre);
if  (input  != null )
try  {
input.close();
}  catch  (IOException e) {
}
if  ( ! uploadre.equals( "" )) {
status  =  twitter.updateStatus(text  + " " +  uploadre);
System.out.println( " uploadre= " +  uploadre);
}
}  else  {
status  =  twitter.updateStatus(text);
}
if  (status  != null ) {
System.out.println( " 發表內容: " +  status.getText());
isOk  = true ;
}
}  catch  (Exception e) {
isOk  = false ;
}
return  isOk;
}
}

TwitterLoginBrowser類

package  com.twitter;

import  twitter4j.TwitterException;
import  android.app.Activity;
import  android.app.ProgressDialog;
import  android.content.Context;
import  android.content.Intent;
import  android.content.SharedPreferences;
import  android.content.SharedPreferences.Editor;
import  android.graphics.Bitmap;
import  android.os.AsyncTask;
import  android.os.Bundle;
import  android.view.KeyEvent;
import  android.view.Window;
import  android.webkit.WebChromeClient;
import  android.webkit.WebView;
import  android.webkit.WebViewClient;
import  android.widget.Toast;

public class  TwitterLoginBrowser  extends  Activity {
WebView webview;
ProgressDialog progressDialog; //  定義一個進度條
TwitterConnect tc;
String authenticateUrl  = "" ;

ConnectTask task;

String oauthToken;
String oauthVerifier;

Bitmap userImage; //  用戶頭像

@Override
protected void  onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.twitter_loginbrowser);
progressDialog  = new  ProgressDialog(TwitterLoginBrowser. this );
progressDialog.setTitle( " 請等待 " );
progressDialog.setMessage( " 正在加載頁面，請稍等... " );
progressDialog.show(); //  啓動的時候就讓它顯示
webview  =  (WebView) findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled( true );
webview.requestFocus();

tc  = new  TwitterConnect( this );
task  = new  ConnectTask( this );
task.execute( " login " ); //  執行載入頁面任務

webview.setWebViewClient( new  WebViewClient() {
@Override
public boolean  shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true ;
}

@Override
public void  onPageStarted(WebView view, String url, Bitmap favicon) {
super .onPageStarted(view, url, favicon);
System.out.println( " 開始加載頁面： " +  url);

}

//  頁面載入完成
@Override
public void  onPageFinished(WebView view, String url) {
super .onPageFinished(view, url);
//  url= https://api.twitter.com/oauth/authorize?oauth_token=9kpqNY7VhmyWC5NRXF2eQ73zN4VKXjQcgZj62sIZU &oauth_verifier=3B7FBAs9XOYH8I3QEQrFGuqJlgMUfQH5fzmz7j3Ws

Toast.makeText(TwitterLoginBrowser. this ,  " 頁面加載完成 " ,
Toast.LENGTH_LONG).show();
if  (url  != null &&  url.startsWith(CONST.CALLBACK_URL)) {
String[] param  =  url.split( " \\? " )[ 1 ].split( " & " );
if  (param[ 0 ].startsWith( " oauth_token " )) {
oauthToken  =  param[ 0 ].split( " = " )[ 1 ];
}  else if  (param[ 1 ].startsWith( " oauth_token " )) {
oauthToken  =  param[ 1 ].split( " = " )[ 1 ];
}
if  (param[ 0 ].startsWith( " oauth_verifier " )) {
oauthVerifier  =  param[ 0 ].split( " = " )[ 1 ];
}  else if  (param[ 1 ].startsWith( " oauth_verifier " )) {
oauthVerifier  =  param[ 1 ].split( " = " )[ 1 ];
}
System.out.println( " oauthToken= " +  oauthToken);
System.out.println( " oauthVerifier= " +  oauthVerifier);
try  {
TwitterConnect.accessToken  =  TwitterConnect.twitter
.getOAuthAccessToken(
TwitterConnect.requestToken,
oauthVerifier);
WebTask wt  = new  WebTask();
wt.execute( "" );
}  catch  (TwitterException e) {
e.printStackTrace();
System.out.println( " 發生錯誤了 " );
}
}
}
});
webview.setWebChromeClient( new  WebChromeClient() {
//  控制進度條的顯示
@Override
public void  onProgressChanged(WebView view,  int  newProgress) {
super .onProgressChanged(view, newProgress);
if  (newProgress  != 100 ) {
if  ( ! progressDialog.isShowing()) {
progressDialog.show();
}
}  else  {
if  (progressDialog.isShowing()) {
progressDialog.dismiss();
}
}
}
});
}

//  獲取用戶名和頭像
class  WebTask  extends  AsyncTask < String, Integer, String >  {

@Override
protected  String doInBackground(String... params) {
String result  = "" ;
if  (oauthToken  != null &&  oauthVerifier  != null ) {
System.out.println( " 開始獲取用戶名和頭像 " );
String userImageUrl  = "" ; //  用戶頭像url
try  {
userImageUrl  =  TwitterConnect.twitter
.showUser(TwitterConnect.accessToken.getUserId())
.getProfileImageURL().toString();
}  catch  (TwitterException e) {
e.printStackTrace();
}
String userName  =  tc.getUserName();
if  (userImage  != null ) {
userImage.recycle();
}
userImage  =  tc.getUserImage(userImageUrl);
//  登錄成功 回到來的畫面
Intent intent  = new  Intent();
Bundle bundle  = new  Bundle();
bundle.putParcelable( " userImage " , userImage);
bundle.putString( " userName " , userName);
intent.putExtra( " userInfo " , bundle);
//  保存登錄狀態
SharedPreferences spf  =  getSharedPreferences( " bravesoft " ,
Context.MODE_PRIVATE);
Editor editor  =  spf.edit();
editor.putString( " oauth_token " ,
TwitterConnect.accessToken.getToken());
editor.putString( " oauth_token_secret " ,
TwitterConnect.accessToken.getTokenSecret());
editor.putBoolean( " connection_tatus " ,  true );
editor.putString( " username " , userName);
editor.putString( " userimgurl " , userImageUrl);
editor.commit();
TwitterLoginBrowser. this .setResult( 1 , intent);
bundle.clear();
result  = " ok " ;
}
return  result;
}

@Override
protected void  onPostExecute(String result) {
super .onPostExecute(result);
if  (result.equals( " ok " )) {
Toast.makeText(TwitterLoginBrowser. this ,  " 登錄成功 " ,
Toast.LENGTH_LONG).show();
}  else  {
Toast.makeText(TwitterLoginBrowser. this ,  " 登錄失敗 " ,
Toast.LENGTH_LONG).show();
}
//  TwitterLoginBrowser.this.finish();
}

}

class  ConnectTask  extends  AsyncTask < String, Integer, String >  {

public  ConnectTask(Context context) {

}

@Override
protected  String doInBackground(String... params) {
authenticateUrl  =  tc.twitterLoginOAuth();
return  authenticateUrl;
}

@Override
protected void  onPostExecute(String result) {
super .onPostExecute(result);
if  ( ! result.equals( "" )) {
webview.loadUrl(result); //  載入網頁
}  else  {
Toast.makeText(TwitterLoginBrowser. this ,  " 載入錯誤，請重試 " ,
Toast.LENGTH_LONG).show();
TwitterLoginBrowser. this .finish();
}
}

}

@Override
public boolean  onKeyDown( int  keyCode, KeyEvent event) {
if  (keyCode  ==  KeyEvent.KEYCODE_BACK  &&  webview.canGoBack()) {
webview.goBack();
return true ;
}
return super .onKeyDown(keyCode, event); } }