Tweet senden

1import android.app.Activity;
2import android.content.Intent;
3import android.content.SharedPreferences;
4import android.content.SharedPreferences.Editor;
5import android.net.Uri;
6import android.os.Bundle;
7import android.util.Log;
8import android.view.View;
9import android.webkit.WebView;
10import android.widget.Button;
11import android.widget.Toast;
12import twitter4j.Twitter;
13import twitter4j.TwitterException;
14import twitter4j.TwitterFactory;
15import twitter4j.auth.AccessToken;
16import twitter4j.auth.RequestToken;
17
18public class TweetToTwitterActivity extends Activity {
19
20 private static final String TAG = "Blundell.TweetToTwitterActivity";
21 private static final String PREF_ACCESS_TOKEN = "accessToken";
22 private static final String PREF_ACCESS_TOKEN_SECRET = "accessTokenSecret";
23 private static final String CONSUMER_KEY = "Key von Twitter erhalten";
24 private static final String CONSUMER_SECRET = "Secret von Twitter erhalten";
25 private static final String CALLBACK_URL = "abc";
26 private SharedPreferences mPrefs;
27 private Twitter mTwitter;
28 private RequestToken mReqToken;
29 private Button mLoginButton;
30 private Button mTweetButton;
31
32
33 @Override
34 public void onCreate(Bundle savedInstanceState) {
35 super.onCreate(savedInstanceState);
36 Log.i(TAG, "Loading TweetToTwitterActivity");
37 setContentView(R.layout.activity_main);
38
39 mPrefs = getSharedPreferences("twitterPrefs", MODE_PRIVATE);
40 Log.i(TAG, "Got Preferences");
41
42 mTwitter = new TwitterFactory().getInstance();
43 Log.i(TAG, "Got Twitter4j");
44
45 mTwitter.setOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
46 Log.i(TAG, "Inflated Twitter4j");
47
48 mLoginButton = (Button) findViewById(R.id.login_button);
49 mTweetButton = (Button) findViewById(R.id.tweet_button);
50 }
51
52 public void buttonLogin(View v) {
53 Log.i(TAG, "Login Pressed");
54 if (mPrefs.contains(PREF_ACCESS_TOKEN)) {
55 Log.i(TAG, "Repeat User");
56 loginAuthorisedUser();
57 } else {
58 Log.i(TAG, "New User");
59 loginNewUser();
60 }
61 }
62
63 public void buttonTweet(View v) {
64 Log.i(TAG, "Tweet Pressed");
65 tweetMessage();
66 }
67
68 private void loginNewUser() {
69 try {
70 Log.i(TAG, "Request App Authentication");
71 mReqToken = mTwitter.getOAuthRequestToken(CALLBACK_URL);
72
73 Log.i(TAG, "Starting Webview to login to twitter");
74 WebView twitterSite = new WebView(this);
75 twitterSite.loadUrl(mReqToken.getAuthenticationURL());
76 setContentView(twitterSite);
77
78 } catch (TwitterException e) {
79 Toast.makeText(this, "Twitter Login error, try again later", Toast.LENGTH_SHORT).show();
80 }
81 }
82
83 private void loginAuthorisedUser() {
84 String token = mPrefs.getString(PREF_ACCESS_TOKEN, null);
85 String secret = mPrefs.getString(PREF_ACCESS_TOKEN_SECRET, null);
86
87 AccessToken at = new AccessToken(token, secret);
88
89 mTwitter.setOAuthAccessToken(at);
90
91 Toast.makeText(this, "Welcome back", Toast.LENGTH_SHORT).show();
92
93 enableTweetButton();
94 }
95
96
97 @Override
98 protected void onNewIntent(Intent intent) {
99 super.onNewIntent(intent);
100 Log.i(TAG, "New Intent Arrived");
101 dealWithTwitterResponse(intent);
102 }
103
104 @Override
105 protected void onResume() {
106 super.onResume();
107 Log.i(TAG, "Arrived at onResume");
108 }
109
110 private void dealWithTwitterResponse(Intent intent) {
111 Uri uri = intent.getData();
112 if (uri != null && uri.toString().startsWith(CALLBACK_URL)) {
113 String oauthVerifier = uri.getQueryParameter("oauth_verifier");
114
115 authoriseNewUser(oauthVerifier);
116 }
117 }
118
119 private void authoriseNewUser(String oauthVerifier) {
120 try {
121 AccessToken at = mTwitter.getOAuthAccessToken(mReqToken, oauthVerifier);
122 mTwitter.setOAuthAccessToken(at);
123
124 saveAccessToken(at);
125
126 setContentView(R.layout.activity_main);
127
128 enableTweetButton();
129 } catch (TwitterException e) {
130 Toast.makeText(this, "Twitter auth error x01, try again later", Toast.LENGTH_SHORT).show();
131 }
132 }
133
134
135 private void enableTweetButton() {
136 Log.i(TAG, "User logged in - allowing to tweet");
137 mLoginButton.setEnabled(false);
138 mTweetButton.setEnabled(true);
139 }
140
141
142 private void tweetMessage() {
143 new Thread(){
144 public void run(){
145 try {
146 mTwitter.updateStatus("Tweet Android");
147 makeTweet("sending OK");
148 } catch (TwitterException e) {
149 makeTweet("ERROR");
150 }
151 }
152 }.start();
153 }
154
155 private void makeTweet(String message){
156 Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
157 }
158
159 private void saveAccessToken(AccessToken at) {
160 String token = at.getToken();
161 String secret = at.getTokenSecret();
162 Editor editor = mPrefs.edit();
163 editor.putString(PREF_ACCESS_TOKEN, token);
164 editor.putString(PREF_ACCESS_TOKEN_SECRET, secret);
165 editor.commit();
166 }
167}