onNewIntent(intent) 不能正常工作
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【中文标题】onNewIntent(intent) 不能正常工作【英文标题】：onNewIntent(intent) not working as it should 【发布时间】：2012-10-19 02:06:54 【问题描述】：我正在构建这个 twitter 应用程序，在该应用程序中调用浏览器来从我的主要活动中进行身份验证.. 在线程中运行以下代码（AsyncTask）
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)).setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_FROM_BACKGROUND);
context.startActivity(intent);
这里
context is the context of main activity..the uri is returned through `intent`..
身份验证后，它要做的就是回到我的主要活动，回到目前的状态.. 现在发生的是，它创建了另一个主要活动实例..
我正在使用
@Override
public void onNewIntent(Intent intent)
super.onNewIntent(intent);
SharedPreferences prefs = getSharedPreferences("twitter", 0);
final Uri uri = intent.getData();
if (uri != null && uri.getScheme().equals(Constants.OAUTH_CALLBACK_SCHEME))
setLoggedIn(true, tlogout);
tstatus=true;
new RetrieveAccessTokenTask(this,consumer,provider,prefs,tstring).execute(uri);
但是，问题仍然存在..另一件事是，在模拟器（2.3）中一切正常.. 无法在我的设备上运行..它的 android 2.3.6
我的清单是
<activity
android:name=".mainActivity"
android:launchMode="singleTask"
android:label="@string/title_activity_main" >
<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:scheme="x-oauthflow-twitter" android:host="callback" />
</intent-filter>
</activity>
【问题讨论】：
看来问题出在 Android 2.3.5 和 2.3.6.. 【参考方案1】：我不熟悉 Twitter 的认证过程，但你可以试试FLAG_ACTIVITY_CLEAR_TOP，而不是Intent.FLAG_ACTIVITY_SINGLE_TOP。
仅当您的主要活动在堆栈顶部时，后者才对您有效，另一个清除堆栈并确保您的活动在顶部。
【讨论】：
【参考方案2】：OAuthRequestTokenTask.java
package com.android.twit;
import oauth.signpost.OAuthConsumer;
import oauth.signpost.OAuthProvider;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.util.Log;
public class OAuthRequestTokenTask extends AsyncTask<Void, Void, Void>
final String TAG = getClass().getName();
private Context context;
private OAuthProvider provider;
private OAuthConsumer consumer;
/**
*
* We pass the OAuth consumer and provider.
*
* @param context
* Required to be able to start the intent to launch the browser.
* @param provider
* The OAuthProvider object
* @param consumer
* The OAuthConsumer object
*/
public OAuthRequestTokenTask(Context context, OAuthConsumer consumer,
OAuthProvider provider)
this.context = context;
this.consumer = consumer;
this.provider = provider;
/**
*
* Retrieve the OAuth Request Token and present a browser to the user to
* authorize the token.
*
*/
@Override
protected Void doInBackground(Void... params)
try
Log.i(TAG, "Retrieving request token from Google servers");
final String url = provider.retrieveRequestToken(consumer,
ConstantsTwit.OAUTH_CALLBACK_URL);
Log.i(TAG, "Popping a browser with the authorize URL : " + url);
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url))
.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP
| Intent.FLAG_ACTIVITY_NO_HISTORY
| Intent.FLAG_FROM_BACKGROUND);
context.startActivity(intent);
catch (Exception e)
Log.e(TAG, "Error during OAUth retrieve request token", e);
return null;
PrepareRequestTokenActivity.java
package com.android.twit;
import oauth.signpost.OAuth;
import oauth.signpost.OAuthConsumer;
import oauth.signpost.OAuthProvider;
import oauth.signpost.basic.DefaultOAuthProvider;
import oauth.signpost.commonshttp.CommonsHttpOAuthConsumer;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
public class PrepareRequestTokenActivity extends Activity
final String TAG = getClass().getName();
private OAuthConsumer consumer;
private OAuthProvider provider;
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
try
// CommonsHttpOAuthConsumer
this.consumer = new CommonsHttpOAuthConsumer(
ConstantsTwit.CONSUMER_KEY, ConstantsTwit.CONSUMER_SECRET);
// this.provider = new
// CommonsHttpOAuthProvider(Constants.REQUEST_URL,
// Constants.ACCESS_URL, Constants.AUTHORIZE_URL);
this.provider = new DefaultOAuthProvider(ConstantsTwit.REQUEST_URL,
ConstantsTwit.ACCESS_URL, ConstantsTwit.AUTHORIZE_URL);
catch (Exception e)
Log.e(TAG, "Error creating consumer / provider", e);
Log.i(TAG, "Starting task to retrieve request token.");
new OAuthRequestTokenTask(this, this.consumer, this.provider).execute();
/**
* Called when the OAuthRequestTokenTask finishes (user has authorized the
* request token). The callback URL will be intercepted here.
*/
@Override
public void onNewIntent(Intent intent)
super.onNewIntent(intent);
Log.e("", "onNewIntent() is called...");
SharedPreferences prefs = PreferenceManager
.getDefaultSharedPreferences(this);
final Uri uri = intent.getData();
if (uri != null
&& uri.getScheme().equals(ConstantsTwit.OAUTH_CALLBACK_SCHEME))
Log.i(TAG, "Callback received : " + uri);
Log.i(TAG, "Retrieving Access Token");
new RetrieveAccessTokenTask(this, consumer, provider, prefs)
.execute(uri);
finish();
public class RetrieveAccessTokenTask extends AsyncTask<Uri, Void, Void>
private Context context;
private OAuthProvider provider;
private OAuthConsumer consumer;
private SharedPreferences prefs;
public RetrieveAccessTokenTask(Context context, OAuthConsumer consumer,
OAuthProvider provider, SharedPreferences prefs)
this.context = context;
this.consumer = consumer;
this.provider = provider;
this.prefs = prefs;
/**
* Retrieve the oauth_verifier, and store the oauth and
* oauth_token_secret for future API calls.
*/
@Override
protected Void doInBackground(Uri... params)
final Uri uri = params[0];
final String oauth_verifier = uri
.getQueryParameter(OAuth.OAUTH_VERIFIER);
try
provider.retrieveAccessToken(consumer, oauth_verifier);
final Editor edit = prefs.edit();
edit.putString(OAuth.OAUTH_TOKEN, consumer.getToken());
edit.putString(OAuth.OAUTH_TOKEN_SECRET,
consumer.getTokenSecret());
edit.commit();
String token = prefs.getString(OAuth.OAUTH_TOKEN, "");
String secret = prefs.getString(OAuth.OAUTH_TOKEN_SECRET, "");
consumer.setTokenWithSecret(token, secret);
// context.startActivity(new Intent(context,
// AndroidTwitterSample.class));
executeAfterAccessTokenRetrieval();
Log.e(TAG, "OAuth - Access Token Retrieved");
catch (Exception e)
Log.e(TAG, "OAuth - Access Token Retrieval Error", e);
return null;
private void executeAfterAccessTokenRetrieval()
String msg = getIntent().getExtras().getString("tweet_msg");
String path = getIntent().getExtras().getString("imagePath");
try
TwitterUtils.sendTweet(prefs, msg, path);
catch (Exception e)
Log.e(TAG, "OAuth - Error sending to Twitter", e);
ConstantsTwit.java
package com.android.twit;
public class ConstantsTwit
public static final String CONSUMER_KEY = "xxxxxxxxxxxxxxx";
public static final String CONSUMER_SECRET = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
public static final String REQUEST_URL = " https://api.twitter.com/oauth/request_token";
public static final String ACCESS_URL = "https://api.twitter.com/oauth/access_token";
public static final String AUTHORIZE_URL = "https://api.twitter.com/oauth/authorize";
public static final String OAUTH_CALLBACK_SCHEME = "x-test-oauth-twitter";
public static final String OAUTH_CALLBACK_HOST = "callback";
public static final String OAUTH_CALLBACK_URL = OAUTH_CALLBACK_SCHEME
+ "://" + OAUTH_CALLBACK_HOST;
在 AndroidManifest.xml 中
<activity
android:name="com.android.twit.PrepareRequestTokenActivity"
android:configChanges="touchscreen|keyboard|keyboardHidden|navigation|orientation"
android:excludeFromRecents="true"
android:launchMode="singleTask"
android:windowSoftInputMode="stateAlwaysHidden" >
<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="callback"
android:scheme="x-test-oauth-twitter" />
</intent-filter>
</activity>
TwitterUtils.java
package com.android.twit;
import oauth.signpost.OAuth;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.http.AccessToken;
import android.app.Activity;
import android.content.SharedPreferences;
import android.widget.Toast;
public class TwitterUtils
public static Activity tmp_Add_Daily_Mood;
public static boolean isAuthenticated(SharedPreferences prefs)
String token = prefs.getString(OAuth.OAUTH_TOKEN, "");
String secret = prefs.getString(OAuth.OAUTH_TOKEN_SECRET, "");
AccessToken a = new AccessToken(token, secret);
Twitter twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(ConstantsTwit.CONSUMER_KEY,
ConstantsTwit.CONSUMER_SECRET);
twitter.setOAuthAccessToken(a);
try
twitter.getAccountSettings();
return true;
catch (TwitterException e)
return false;
public static void sendTweet(SharedPreferences prefs, String msg)
throws Exception
String token = prefs.getString(OAuth.OAUTH_TOKEN, "");
String secret = prefs.getString(OAuth.OAUTH_TOKEN_SECRET, "");
AccessToken a = new AccessToken(token, secret);
Twitter twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(ConstantsTwit.CONSUMER_KEY,
ConstantsTwit.CONSUMER_SECRET);
twitter.setOAuthAccessToken(a);
twitter.updateStatus(msg);
用法
Intent i = new Intent(getApplicationContext(),
PrepareRequestTokenActivity.class);
i.putExtra("tweet_msg", getTweetMsg());
startActivity(i);
看看这个...它可能对你有帮助..
【讨论】：
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