如何使用twitter4j lib获取屏幕名称的推文?

时间:2013-05-15 08:05:46

标签: android twitter twitter4j tweets

我已经看过很多关于使用这个lib的教程,但是我明白了它。

首先,我如何验证twitter app?,

有什么方法可以对访问令牌进行硬编码,这样用户就不必做任何事情,他可以通过输入屏幕名称来直接搜索特定用户的推文吗?

如何在提及屏幕名称后收到推文?

我尝试用twitter4j lib阅读文档,但它帮助我....

我需要帮助我在两天内陷入困境,Plz帮助...

1 个答案:

答案 0 :(得分:1)

有多种方法可以进行身份​​验证:

首先,您需要创建一个应用程序here。 然后,您将收到您的消费者密钥和秘密:

Consumer key

然后,您可以使用此代码在启动时请求授权。

public class MainActivity extends Activity {

    // TwitterProperties
    private CommonsHttpOAuthConsumer httpOauthConsumer;
    private OAuthProvider httpOauthprovider;

    public final static String consumerKey = "YOUR CONSUMER KEY";
    public final static String consumerSecret = "YOUR CONSUMER SECRET";

    private final String CALLBACKURL = "SCHEME://HOST";

    private Twitter twitter;
    AccessToken a;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        StrictMode.enableDefaults();
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_main);

        doAuth();
    }

    private void doAuth() {
        try {
            httpOauthConsumer = new CommonsHttpOAuthConsumer(consumerKey,
                    consumerSecret);
            httpOauthprovider = new DefaultOAuthProvider(
                    "https://twitter.com/oauth/request_token",
                    "https://twitter.com/oauth/access_token",
                    "https://twitter.com/oauth/authorize");
            String authUrl = httpOauthprovider.retrieveRequestToken(
                    httpOauthConsumer, CALLBACKURL);

            this.startActivity(new Intent(Intent.ACTION_VIEW, Uri
                    .parse(authUrl)));
        } catch (Exception e) {
            Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
        }
    }


    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);

        Uri uri = intent.getData();
        if (uri != null && uri.toString().startsWith(CALLBACKURL)) {

            String verifier = uri
                    .getQueryParameter(oauth.signpost.OAuth.OAUTH_VERIFIER);

            // this will populate token and token_secret in consumer
            try {
                httpOauthprovider.retrieveAccessToken(httpOauthConsumer,
                        verifier);
            } catch (OAuthMessageSignerException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (OAuthNotAuthorizedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (OAuthExpectationFailedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (OAuthCommunicationException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }


            //Important part where it actually sets the authorization so you can use it
            a = new AccessToken(httpOauthConsumer.getToken(),
                    httpOauthConsumer.getTokenSecret());
            twitter = new TwitterFactory().getInstance();
            twitter.setOAuthConsumer(consumerKey, consumerSecret);
            twitter.setOAuthAccessToken(a);
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

要完成这项工作,您需要对Manifest进行一些调整。

  • 允许使用互联网:
    <uses-permission android:name="android.permission.INTERNET" />
  • 将启动模式设置为singleInstance
    <activity
    android:name="com.example.eredivisietwitter.MainActivity"
    android:label="@string/app_name"
    android:launchMode="singleInstance" >
  • 添加此intent-filter
<intent-filter>
    <action android:name="android.intent.action.VIEW" >
    </action>

    <category android:name="android.intent.category.DEFAULT" >
    </category>

    <category android:name="android.intent.category.BROWSABLE" >
    </category>

    <data
        android:host="HOST"
        android:scheme="SCHEME" >
    </data>
</intent-filter>

确保您的活动中拥有相同的主机和方案:

private final String CALLBACKURL = "SCHEME://HOST";

现在您已成功授权您的应用,您可以使用Twitter对象来请求时间表等。

示例:

private void getTweets(String user) {

    try {
        List<Status> statuses;
        statuses = twitter.getUserTimeline(user);

        System.out.println("Showing @" + user + "'s user timeline.");
        for (Status status : statuses) {

            System.out.println("@" + status.getUser().getScreenName()
                    + " - " + status.getText());
        }

    } catch (TwitterException te) {
        te.printStackTrace();
        System.out.println("Failed to get timeline: " + te.getMessage());
    }

}

瞧!