Android Twitterの統合oauthおよびTwitter4jを使用
TwitterをAndroidアプリケーションに統合し、多くのチュートリアルを見つけました。そのうちの2つを実装しました。ただし、実装後、アプリケーションを実行すると、古いバージョンを使用していることがわかりました Twitter4J ライブラリ。
他にもたくさんのチュートリアルがありますが、どれも最新のものではありません。 2〜3か月古いだけです。最新のTwitter4Jライブラリバージョン Twitter4j-core-3.0. を使用するチュートリアルまたは例が必要です。
私の主な目的は、ユーザーが自分のアカウントにtweetsを投稿できるようにすることです。しかし、ここでも、ユーザーがログインしていない場合は、最初に資格情報を要求する必要があります。また、ユーザーがlogoutボタンをクリックした場合、ユーザーをログアウトさせる方法が必要です。
私は問題を解決しました。チュートリアルで見つけたコードを変更して、機能させるようにしました。ここにコード全体をコピーします。 ConsumerKeyとConsumerSecretに置き換えてください。
プロジェクトのlibsフォルダに Twitter4j ライブラリを追加する必要があります。
AndroidManifest.xml：
<manifest xmlns:Android="http://schemas.Android.com/apk/res/Android"
package="com.androidhive.twitterconnect"
Android:versionCode="1"
Android:versionName="1.0" >
<uses-sdk
Android:minSdkVersion="14"
Android:targetSdkVersion="17" />
<!-- Permission - Internet Connect -->
<uses-permission Android:name="Android.permission.INTERNET" />
<!-- Network State Permissions -->
<uses-permission Android:name="Android.permission.ACCESS_NETWORK_STATE" />
<application
Android:allowBackup="true"
Android:icon="@drawable/ic_launcher"
Android:label="@string/app_name"
Android:theme="@style/AppTheme" >
<activity
Android:name=".MainActivity"
Android:label="@string/title_activity_main" >
<intent-filter>
<action Android:name="Android.intent.action.MAIN" />
<category Android:name="Android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action Android:name="Android.intent.action.VIEW" />
<category Android:name="Android.intent.category.DEFAULT" />
<category Android:name="Android.intent.category.BROWSABLE" />
<data
Android:Host="t4jsample"
Android:scheme="oauth" />
</intent-filter>
</activity>
</application>
</manifest>
MainActivity.Java：
package com.androidhive.twitterconnect;
import Twitter4j.Twitter;
import Twitter4j.TwitterException;
import Twitter4j.TwitterFactory;
import Twitter4j.User;
import Twitter4j.auth.AccessToken;
import Twitter4j.auth.RequestToken;
import Twitter4j.conf.Configuration;
import Twitter4j.conf.ConfigurationBuilder;
import com.androidhive.twitterconnect.R;
import Android.app.Activity;
import Android.app.ProgressDialog;
import Android.content.Intent;
import Android.content.SharedPreferences;
import Android.content.SharedPreferences.Editor;
import Android.content.pm.ActivityInfo;
import Android.net.Uri;
import Android.os.AsyncTask;
import Android.os.Bundle;
import Android.text.Html;
import Android.util.Log;
import Android.view.View;
import Android.widget.Button;
import Android.widget.EditText;
import Android.widget.TextView;
import Android.widget.Toast;
public class MainActivity extends Activity {
// Constants
/**
* Register your here app https://dev.Twitter.com/apps/new and get your
* consumer key and secret
* */
static String Twitter_CONSUMER_KEY = "PutYourConsumerKeyHere"; // place your cosumer key here
static String Twitter_CONSUMER_SECRET = "PutYourConsumerSecretHere"; // place your consumer secret here
// Preference Constants
static String PREFERENCE_NAME = "Twitter_oauth";
static final String PREF_KEY_OAUTH_TOKEN = "oauth_token";
static final String PREF_KEY_OAUTH_SECRET = "oauth_token_secret";
static final String PREF_KEY_Twitter_LOGIN = "isTwitterLogedIn";
static final String Twitter_CALLBACK_URL = "oauth://t4jsample";
// Twitter oauth urls
static final String URL_Twitter_AUTH = "auth_url";
static final String URL_Twitter_OAUTH_VERIFIER = "oauth_verifier";
static final String URL_Twitter_OAUTH_TOKEN = "oauth_token";
// Login button
Button btnLoginTwitter;
// Update status button
Button btnUpdateStatus;
// Logout button
Button btnLogoutTwitter;
// EditText for update
EditText txtUpdate;
// lbl update
TextView lblUpdate;
TextView lblUserName;
// Progress dialog
ProgressDialog pDialog;
// Twitter
private static Twitter twitter;
private static RequestToken requestToken;
private AccessToken accessToken;
// Shared Preferences
private static SharedPreferences mSharedPreferences;
// Internet Connection detector
private ConnectionDetector cd;
// Alert Dialog Manager
AlertDialogManager alert = new AlertDialogManager();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
cd = new ConnectionDetector(getApplicationContext());
// Check if Internet present
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Internet Connection Error",
"Please connect to working Internet connection", false);
// stop executing code by return
return;
}
// Check if Twitter keys are set
if(Twitter_CONSUMER_KEY.trim().length() == 0 || Twitter_CONSUMER_SECRET.trim().length() == 0){
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Twitter oAuth tokens", "Please set your Twitter oauth tokens first!", false);
// stop executing code by return
return;
}
// All UI elements
btnLoginTwitter = (Button) findViewById(R.id.btnLoginTwitter);
btnUpdateStatus = (Button) findViewById(R.id.btnUpdateStatus);
btnLogoutTwitter = (Button) findViewById(R.id.btnLogoutTwitter);
txtUpdate = (EditText) findViewById(R.id.txtUpdateStatus);
lblUpdate = (TextView) findViewById(R.id.lblUpdate);
lblUserName = (TextView) findViewById(R.id.lblUserName);
// Shared Preferences
mSharedPreferences = getApplicationContext().getSharedPreferences(
"MyPref", 0);
/**
* Twitter login button click event will call loginToTwitter() function
* */
btnLoginTwitter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Call login Twitter function
loginToTwitter();
}
});
/**
* Button click event to Update Status, will call updateTwitterStatus()
* function
* */
btnUpdateStatus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Call update status function
// Get the status from EditText
String status = txtUpdate.getText().toString();
// Check for blank text
if (status.trim().length() > 0) {
// update status
new updateTwitterStatus().execute(status);
} else {
// EditText is empty
Toast.makeText(getApplicationContext(),
"Please enter status message", Toast.LENGTH_SHORT)
.show();
}
}
});
/**
* Button click event for logout from Twitter
* */
btnLogoutTwitter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Call logout Twitter function
logoutFromTwitter();
}
});
/** This if conditions is tested once is
* redirected from Twitter page. Parse the uri to get oAuth
* Verifier
* */
if (!isTwitterLoggedInAlready()) {
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(Twitter_CALLBACK_URL)) {
// oAuth verifier
final String verifier = uri
.getQueryParameter(URL_Twitter_OAUTH_VERIFIER);
try {
Thread thread = new Thread(new Runnable(){
@Override
public void run() {
try {
// Get the access token
MainActivity.this.accessToken = Twitter.getOAuthAccessToken(
requestToken, verifier);
} catch (Exception e) {
e.printStackTrace();
}
}
});
thread.start();
// Shared Preferences
Editor e = mSharedPreferences.edit();
// After getting access token, access token secret
// store them in application preferences
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
e.putString(PREF_KEY_OAUTH_SECRET,
accessToken.getTokenSecret());
// Store login status - true
e.putBoolean(PREF_KEY_Twitter_LOGIN, true);
e.commit(); // save changes
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
// Hide login button
btnLoginTwitter.setVisibility(View.GONE);
// Show Update Twitter
lblUpdate.setVisibility(View.VISIBLE);
txtUpdate.setVisibility(View.VISIBLE);
btnUpdateStatus.setVisibility(View.VISIBLE);
btnLogoutTwitter.setVisibility(View.VISIBLE);
// Getting user details from Twitter
// For now i am getting his name only
long userID = accessToken.getUserId();
User user = Twitter.showUser(userID);
String username = user.getName();
// Displaying in xml ui
lblUserName.setText(Html.fromHtml("<b>Welcome " + username + "</b>"));
} catch (Exception e) {
// Check log for login errors
Log.e("Twitter Login Error", "> " + e.getMessage());
e.printStackTrace();
}
}
}
}
/**
* Function to login Twitter
* */
private void loginToTwitter() {
// Check if already logged in
if (!isTwitterLoggedInAlready()) {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(Twitter_CONSUMER_KEY);
builder.setOAuthConsumerSecret(Twitter_CONSUMER_SECRET);
Configuration configuration = builder.build();
TwitterFactory factory = new TwitterFactory(configuration);
Twitter = factory.getInstance();
Thread thread = new Thread(new Runnable(){
@Override
public void run() {
try {
requestToken = Twitter
.getOAuthRequestToken(Twitter_CALLBACK_URL);
MainActivity.this.startActivity(new Intent(Intent.ACTION_VIEW, Uri
.parse(requestToken.getAuthenticationURL())));
} catch (Exception e) {
e.printStackTrace();
}
}
});
thread.start();
} else {
// user already logged into Twitter
Toast.makeText(getApplicationContext(),
"Already Logged into Twitter", Toast.LENGTH_LONG).show();
}
}
/**
* Function to update status
* */
class updateTwitterStatus extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Updating to Twitter...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting Places JSON
* */
protected String doInBackground(String... args) {
Log.d("Tweet Text", "> " + args[0]);
String status = args[0];
try {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(Twitter_CONSUMER_KEY);
builder.setOAuthConsumerSecret(Twitter_CONSUMER_SECRET);
// Access Token
String access_token = mSharedPreferences.getString(PREF_KEY_OAUTH_TOKEN, "");
// Access Token Secret
String access_token_secret = mSharedPreferences.getString(PREF_KEY_OAUTH_SECRET, "");
AccessToken accessToken = new AccessToken(access_token, access_token_secret);
Twitter twitter = new TwitterFactory(builder.build()).getInstance(accessToken);
// Update status
Twitter4j.Status response = Twitter.updateStatus(status);
Log.d("Status", "> " + response.getText());
} catch (TwitterException e) {
// Error in updating status
Log.d("Twitter Update Error", e.getMessage());
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog and show
* the data in UI Always use runOnUiThread(new Runnable()) to update UI
* from background thread, otherwise you will get error
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Status tweeted successfully", Toast.LENGTH_SHORT)
.show();
// Clearing EditText field
txtUpdate.setText("");
}
});
}
}
/**
* Function to logout from Twitter
* It will just clear the application shared preferences
* */
private void logoutFromTwitter() {
// Clear the shared preferences
Editor e = mSharedPreferences.edit();
e.remove(PREF_KEY_OAUTH_TOKEN);
e.remove(PREF_KEY_OAUTH_SECRET);
e.remove(PREF_KEY_Twitter_LOGIN);
e.commit();
// After this take the appropriate action
// I am showing the hiding/showing buttons again
// You might not needed this code
btnLogoutTwitter.setVisibility(View.GONE);
btnUpdateStatus.setVisibility(View.GONE);
txtUpdate.setVisibility(View.GONE);
lblUpdate.setVisibility(View.GONE);
lblUserName.setText("");
lblUserName.setVisibility(View.GONE);
btnLoginTwitter.setVisibility(View.VISIBLE);
}
/**
* Check user already logged in your application using Twitter Login flag is
* fetched from Shared Preferences
* */
private boolean isTwitterLoggedInAlready() {
// return Twitter login status from Shared Preferences
return mSharedPreferences.getBoolean(PREF_KEY_Twitter_LOGIN, false);
}
protected void onResume() {
super.onResume();
}
}
AlertDialogManager.Java：
package com.androidhive.twitterconnect;
import Android.app.AlertDialog;
import Android.content.Context;
import Android.content.DialogInterface;
public class AlertDialogManager {
/**
* Function to display simple Alert Dialog
* @param context - application context
* @param title - alert dialog title
* @param message - alert message
* @param status - success/failure (used to set icon)
* - pass null if you don't want icon
* */
public void showAlertDialog(Context context, String title, String message,
Boolean status) {
AlertDialog alertDialog = new AlertDialog.Builder(context).create();
// Setting Dialog Title
alertDialog.setTitle(title);
// Setting Dialog Message
alertDialog.setMessage(message);
if(status != null)
// Setting alert dialog icon
alertDialog.setIcon((status) ? R.drawable.success : R.drawable.fail);
// Setting OK Button
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
// Showing Alert Message
alertDialog.show();
}
}
ConnectionDetector.Java：
package com.androidhive.twitterconnect;
import Android.content.Context;
import Android.net.ConnectivityManager;
import Android.net.NetworkInfo;
public class ConnectionDetector {
private Context _context;
public ConnectionDetector(Context context){
this._context = context;
}
/**
* Checking for all possible internet providers
* **/
public boolean isConnectingToInternet(){
ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null)
{
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null)
for (int i = 0; i < info.length; i++)
if (info[i].getState() == NetworkInfo.State.CONNECTED)
{
return true;
}
}
return false;
}
}
これは オリジナルコード Ravi Tamadaによるものです。私が行った変更はMainActivity.JavaおよびAndroidManifest.xmlファイルのみ。
Android上のTwitter4j 3.0.3でうまく機能する良い例を見つけました。その他は機能しません。 http://hintdesk.com/how-to-Tweet-in-Twitter-within-Android-client/
これは私のコードの実際の例です。私はTwitter4jを使用しています。また、ブラウザーの代わりにwebviewを使用しているため、マニフェストにインテントを設定する必要はありません。
消費者と秘密鍵を配置すれば、準備完了です
package com.example.mysituationtwittertest;
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 Android.app.Activity;
import Android.content.SharedPreferences;
import Android.content.SharedPreferences.Editor;
import Android.net.Uri;
import Android.os.AsyncTask;
import Android.os.Bundle;
import Android.util.Log;
import Android.view.View;
import Android.webkit.WebView;
import Android.webkit.WebViewClient;
import Android.widget.Button;
import Android.widget.Toast;
public class MainActivity extends Activity {
// Constants
/**
* Register your here app https://dev.Twitter.com/apps/new and get your
* consumer key and secret
* */
static String Twitter_CONSUMER_KEY = "XXXXXXXXXXXXXXXXXXX"; // place your
// cosumer
// key here
static String Twitter_CONSUMER_SECRET = "XXXXXXXXXXXXXXXX"; // place
// your
// consumer
// secret
// here
// Preference Constants
static String PREFERENCE_NAME = "Twitter_oauth";
static final String PREF_KEY_OAUTH_TOKEN = "oauth_token";
static final String PREF_KEY_OAUTH_SECRET = "oauth_token_secret";
static final String PREF_KEY_Twitter_LOGIN = "isTwitterLogedIn";
static final String Twitter_CALLBACK_URL = "oauth://youdare";
// Twitter oauth urls
static final String URL_Twitter_AUTH = "auth_url";
static final String URL_Twitter_OAUTH_VERIFIER = "oauth_verifier";
static final String URL_Twitter_OAUTH_TOKEN = "oauth_token";
// Login button
Button btnShareTwitter;
WebView myWebView;
// Twitter
private static Twitter twitter;
private static RequestToken requestToken;
private AccessToken accessToken;
// Shared Preferences
private static SharedPreferences mSharedPreferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// All UI elements
btnShareTwitter = (Button) findViewById(R.id.btnShareTwitter);
myWebView = (WebView) findViewById(R.id.webView1);
myWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView webView, String url) {
if (url != null && url.startsWith(Twitter_CALLBACK_URL))
new AfterLoginTask().execute(url);
else
webView.loadUrl(url);
return true;
}
});
// Shared Preferences
mSharedPreferences = getApplicationContext().getSharedPreferences(
"MyPref", 0);
/**
* Twitter login button click event will call loginToTwitter() function
* */
btnShareTwitter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Call login Twitter function
new LoginTask().execute();
}
});
}
/**
* Function to login Twitter
* */
private void loginToTwitter() {
// Check if already logged in
if (!isTwitterLoggedInAlready()) {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(Twitter_CONSUMER_KEY);
builder.setOAuthConsumerSecret(Twitter_CONSUMER_SECRET);
Configuration configuration = builder.build();
TwitterFactory factory = new TwitterFactory(configuration);
Twitter = factory.getInstance();
try {
requestToken = Twitter
.getOAuthRequestToken(Twitter_CALLBACK_URL);
} catch (TwitterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else {
// user already logged into Twitter
Toast.makeText(getApplicationContext(),
"Already Logged into Twitter", Toast.LENGTH_LONG).show();
}
}
/**
* Check user already logged in your application using Twitter Login flag is
* fetched from Shared Preferences
* */
private boolean isTwitterLoggedInAlready() {
// return Twitter login status from Shared Preferences
return mSharedPreferences.getBoolean(PREF_KEY_Twitter_LOGIN, false);
}
public void handleTwitterCallback(String url) {
Uri uri = Uri.parse(url);
// oAuth verifier
final String verifier = uri
.getQueryParameter(URL_Twitter_OAUTH_VERIFIER);
try {
// Get the access token
MainActivity.this.accessToken = Twitter.getOAuthAccessToken(
requestToken, verifier);
// Shared Preferences
Editor e = mSharedPreferences.edit();
// After getting access token, access token secret
// store them in application preferences
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
e.putString(PREF_KEY_OAUTH_SECRET, accessToken.getTokenSecret());
// Store login status - true
e.putBoolean(PREF_KEY_Twitter_LOGIN, true);
e.commit(); // save changes
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(Twitter_CONSUMER_KEY);
builder.setOAuthConsumerSecret(Twitter_CONSUMER_SECRET);
// Access Token
String access_token = mSharedPreferences.getString(
PREF_KEY_OAUTH_TOKEN, "");
// Access Token Secret
String access_token_secret = mSharedPreferences.getString(
PREF_KEY_OAUTH_SECRET, "");
AccessToken accessToken = new AccessToken(access_token,
access_token_secret);
Twitter twitter = new TwitterFactory(builder.build())
.getInstance(accessToken);
// Update status
Twitter4j.Status response = Twitter
.updateStatus("XXXXXXXXXXXXXXXXX");
} catch (Exception e) {
e.printStackTrace();
}
}
class LoginTask extends AsyncTask<Void, Void, Boolean> {
@Override
protected Boolean doInBackground(Void... params) {
// TODO Auto-generated method stub
loginToTwitter();
return true;
}
@Override
protected void onPostExecute(Boolean result) {
// TODO Auto-generated method stub
myWebView.loadUrl(requestToken.getAuthenticationURL());
myWebView.setVisibility(View.VISIBLE);
myWebView.requestFocus(View.FOCUS_DOWN);
}
}
class AfterLoginTask extends AsyncTask<String, Void, Boolean> {
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
myWebView.clearHistory();
}
@Override
protected Boolean doInBackground(String... params) {
// TODO Auto-generated method stub
handleTwitterCallback(params[0]);
return true;
}
@Override
protected void onPostExecute(Boolean result) {
// TODO Auto-generated method stub
myWebView.setVisibility(View.GONE);
Toast.makeText(MainActivity.this, "Tweet Successful",
Toast.LENGTH_SHORT).show();
}
}
@Override
public void onBackPressed() {
if (myWebView.getVisibility() == View.VISIBLE) {
if (myWebView.canGoBack()) {
myWebView.goBack();
return;
} else {
myWebView.setVisibility(View.GONE);
return;
}
}
super.onBackPressed();
}
}
上記の私のコメントを説明するために、これが私の最終的な動作のMainActivityクラスです。上記のコードとかなり似ていますが、違いは次のとおりです。
- Oauthトークンの取得とユーザー情報を含む内部クラス
OAuthAccessTokenTask - そのコールバック
onRequestTokenRetrieved(Exception)
また、これを機能させるには、Twitterアプリの設定で、コールバックURLを宣言する必要があることに注意してください。仕組みを理解するのに数時間かかりました。
Twitter4jのドキュメントを確認すると、最初のコードは、認証Webページから取得する必要があるPINコードを参照しています。これは、アプリでコールバックURLが設定されていない場合に起こります。これは、 PINベースの認証であり、携帯電話で使用したくない:)
public class MainActivity extends Activity {
// Constants
/**
* Register your here app https://dev.Twitter.com/apps/new and get your
* consumer key and secret
* */
static String Twitter_CONSUMER_KEY = "PutYourConsumerKeyHere"; // place your cosumer key here
static String Twitter_CONSUMER_SECRET = "PutYourConsumerSecretHere"; // place your consumer secret here
// Preference Constants
static String PREFERENCE_NAME = "Twitter_oauth";
static final String PREF_KEY_OAUTH_TOKEN = "oauth_token";
static final String PREF_KEY_OAUTH_SECRET = "oauth_token_secret";
static final String PREF_KEY_Twitter_LOGIN = "isTwitterLogedIn";
static final String Twitter_CALLBACK_URL = "oauth://t4jsample";
// Twitter oauth urls
static final String URL_Twitter_AUTH = "auth_url";
static final String URL_Twitter_OAUTH_VERIFIER = "oauth_verifier";
static final String URL_Twitter_OAUTH_TOKEN = "oauth_token";
// Login button
Button btnLoginTwitter;
// Update status button
Button btnUpdateStatus;
// Logout button
Button btnLogoutTwitter;
// EditText for update
EditText txtUpdate;
// lbl update
TextView lblUpdate;
TextView lblUserName;
// Progress dialog
ProgressDialog pDialog;
// Twitter
private static Twitter twitter;
private static RequestToken requestToken;
private AccessToken accessToken;
private User user;
// Shared Preferences
private static SharedPreferences mSharedPreferences;
// Internet Connection detector
private ConnectionDetector cd;
// Alert Dialog Manager
AlertDialogManager alert = new AlertDialogManager();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
cd = new ConnectionDetector(getApplicationContext());
// Check if Internet present
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Internet Connection Error", "Please connect to working Internet connection", false);
// stop executing code by return
return;
}
// Check if Twitter keys are set
if(Twitter_CONSUMER_KEY.trim().length() == 0 || Twitter_CONSUMER_SECRET.trim().length() == 0){
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Twitter oAuth tokens", "Please set your Twitter oauth tokens first!", false);
// stop executing code by return
return;
}
// All UI elements
btnLoginTwitter = (Button) findViewById(R.id.btnLoginTwitter);
btnUpdateStatus = (Button) findViewById(R.id.btnUpdateStatus);
btnLogoutTwitter = (Button) findViewById(R.id.btnLogoutTwitter);
txtUpdate = (EditText) findViewById(R.id.txtUpdateStatus);
lblUpdate = (TextView) findViewById(R.id.lblUpdate);
lblUserName = (TextView) findViewById(R.id.lblUserName);
// Shared Preferences
mSharedPreferences = getApplicationContext().getSharedPreferences("MyPref", 0);
/**
* Twitter login button click event will call loginToTwitter() function
* */
btnLoginTwitter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Call login Twitter function
loginToTwitter();
}
});
/**
* Button click event to Update Status, will call updateTwitterStatus()
* function
* */
btnUpdateStatus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Call update status function
// Get the status from EditText
String status = txtUpdate.getText().toString();
// Check for blank text
if (status.trim().length() > 0) {
// update status
new updateTwitterStatus().execute(status);
} else {
// EditText is empty
Toast.makeText(
getApplicationContext(),
"Please enter status message",
Toast.LENGTH_SHORT
).show();
}
}
});
/**
* Button click event for logout from Twitter
* */
btnLogoutTwitter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Call logout Twitter function
logoutFromTwitter();
}
});
/** This if conditions is tested once is
* redirected from Twitter page. Parse the uri to get oAuth
* Verifier
* */
if (!isTwitterLoggedInAlready()) {
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(Twitter_CALLBACK_URL)) {
// oAuth verifier
String verifier = uri.getQueryParameter(URL_Twitter_OAUTH_VERIFIER);
new OAuthAccessTokenTask().execute(verifier);
}
}
}
private class OAuthAccessTokenTask extends AsyncTask<String, Void, Exception>
{
@Override
protected Exception doInBackground(String... params) {
Exception toReturn = null;
try {
accessToken = Twitter.getOAuthAccessToken(requestToken, params[0]);
user = Twitter.showUser(accessToken.getUserId());
}
catch(TwitterException e) {
Log.e(MainActivity.class.getName(), "TwitterError: " + e.getErrorMessage());
toReturn = e;
}
catch(Exception e) {
Log.e(MainActivity.class.getName(), "Error: " + e.getMessage());
toReturn = e;
}
return toReturn;
}
@Override
protected void onPostExecute(Exception exception) {
onRequestTokenRetrieved(exception);
}
}
private void onRequestTokenRetrieved(Exception result) {
if (result != null) {
Toast.makeText(
this,
result.getMessage(),
Toast.LENGTH_LONG
).show();
}
else {
try {
// Shared Preferences
Editor editor = mSharedPreferences.edit();
// After getting access token, access token secret
// store them in application preferences
editor.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
editor.putString(PREF_KEY_OAUTH_SECRET,
accessToken.getTokenSecret());
// Store login status - true
editor.putBoolean(PREF_KEY_Twitter_LOGIN, true);
editor.commit(); // save changes
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
// Hide login button
btnLoginTwitter.setVisibility(View.GONE);
// Show Update Twitter
lblUpdate.setVisibility(View.VISIBLE);
txtUpdate.setVisibility(View.VISIBLE);
btnUpdateStatus.setVisibility(View.VISIBLE);
btnLogoutTwitter.setVisibility(View.VISIBLE);
// Getting user details from Twitter
String username = user.getName();
// Displaying in xml ui
lblUserName.setText(Html.fromHtml("<b>Welcome " + username + "</b>"));
}
catch (Exception ex) {
// Check log for login errors
Log.e("Twitter Login Error", "> " + ex.getMessage());
ex.printStackTrace();
}
}
}
/**
* Function to login Twitter
* */
private void loginToTwitter() {
// Check if already logged in
if (!isTwitterLoggedInAlready()) {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(Twitter_CONSUMER_KEY);
builder.setOAuthConsumerSecret(Twitter_CONSUMER_SECRET);
Configuration configuration = builder.build();
TwitterFactory factory = new TwitterFactory(configuration);
Twitter = factory.getInstance();
Thread thread = new Thread(new Runnable(){
@Override
public void run() {
try {
requestToken = Twitter.getOAuthRequestToken(Twitter_CALLBACK_URL);
MainActivity.this.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(requestToken.getAuthenticationURL())));
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Already Logged into Twitter", Toast.LENGTH_LONG).show();
}
}
});
thread.start();
} else {
// user already logged into Twitter
Toast.makeText(getApplicationContext(), "Already Logged into Twitter", Toast.LENGTH_LONG).show();
}
}
/**
* Function to update status
* */
class updateTwitterStatus extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Updating to Twitter...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting Places JSON
* */
protected String doInBackground(String... args) {
Log.d("Tweet Text", "> " + args[0]);
String status = args[0];
try {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(Twitter_CONSUMER_KEY);
builder.setOAuthConsumerSecret(Twitter_CONSUMER_SECRET);
// Access Token
String access_token = mSharedPreferences.getString(PREF_KEY_OAUTH_TOKEN, "");
// Access Token Secret
String access_token_secret = mSharedPreferences.getString(PREF_KEY_OAUTH_SECRET, "");
AccessToken accessToken = new AccessToken(access_token, access_token_secret);
Twitter twitter = new TwitterFactory(builder.build()).getInstance(accessToken);
// Update status
Twitter4j.Status response = Twitter.updateStatus(status);
Log.d("Status", "> " + response.getText());
} catch (TwitterException e) {
// Error in updating status
Log.d("Twitter Update Error", e.getMessage());
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog and show
* the data in UI Always use runOnUiThread(new Runnable()) to update UI
* from background thread, otherwise you will get error
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Status tweeted successfully", Toast.LENGTH_SHORT)
.show();
// Clearing EditText field
txtUpdate.setText("");
}
});
}
}
/**
* Function to logout from Twitter
* It will just clear the application shared preferences
* */
private void logoutFromTwitter() {
// Clear the shared preferences
Editor e = mSharedPreferences.edit();
e.remove(PREF_KEY_OAUTH_TOKEN);
e.remove(PREF_KEY_OAUTH_SECRET);
e.remove(PREF_KEY_Twitter_LOGIN);
e.commit();
// After this take the appropriate action
// I am showing the hiding/showing buttons again
// You might not needed this code
btnLogoutTwitter.setVisibility(View.GONE);
btnUpdateStatus.setVisibility(View.GONE);
txtUpdate.setVisibility(View.GONE);
lblUpdate.setVisibility(View.GONE);
lblUserName.setText("");
lblUserName.setVisibility(View.GONE);
btnLoginTwitter.setVisibility(View.VISIBLE);
}
/**
* Check user already logged in your application using Twitter Login flag is
* fetched from Shared Preferences
* */
private boolean isTwitterLoggedInAlready() {
// return Twitter login status from Shared Preferences
return mSharedPreferences.getBoolean(PREF_KEY_Twitter_LOGIN, false);
}
protected void onResume() {
super.onResume();
}
}
sign-in-with-Twitter githubプロジェクトをご覧になりましたか？これはTwitter4jに基づいており、Android用のTwitterサインインを実装しています。