我在twitter android链接app中使用了两个活动。第一个活动是LoginActivity，第二个是TweetslistActivity。我在loginActivity中使用了一个按钮，点击后，Twitter登录对话框打开。当用户成功登录时，我的应用程序应该打开第二个活动。但在用户通过身份验证后，我的第一个活动将恢复，我必须再次单击“登录”按钮才能进入第二个活动！
the logcat shows:
08-30 05:05:48.477: I/dalvikvm-heap(4205): Grow heap (frag case) to 6.686MB for 4194320-byte allocation
08-30 05:05:48.557: D/dalvikvm(4205): GC_FOR_ALLOC freed 0K, 3% free 6732K/6920K, paused 76ms, total 76ms
08-30 05:05:49.288: D/gralloc_goldfish(4205): Emulator without GPU emulation detected.
08-30 05:05:55.757: V/tweetsData--(4205): null
08-30 05:06:11.897: E/Twitter Login Error(4205): > No Token available.
我还在Manifest文件中使用了'android：launchMode =“singleTask”'。但它只是指导我从第一次活动到第二次没有登录！我只是卡住了但没有得到任何答案..请提出一些好的解决方案。提前谢谢你。
修改
原始代码：
public class TwitterLoginActivity extends Activity {
TextView tv;
Button loginBtn;
ImageView logo;
private ConnectionDetector cd;
static Twitter twitter;
ProgressDialog pDialog;
ArrayList<String> tweets;
String tweetsData;
private static SharedPreferences mSharedPreferences;
AlertDialogManager alert = new AlertDialogManager();
RequestToken requestToken;
AccessToken accessToken;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.twitter_login);
tweets = new ArrayList<String>();
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
}
cd = new ConnectionDetector(getApplicationContext());
if (!cd.isConnectingToInternet()) {
alert.showAlertDialog(TwitterLoginActivity.this,
"Internet Connection Error",
"Please connect to working Internet connection", false);
return;
}
if (CONSUMER_KEY.trim().length() == 0
|| CONSUMER_SECRET.trim().length() == 0) {
// Internet Connection is not present
alert.showAlertDialog(TwitterLoginActivity.this, "Twitter oAuth tokens",
"Please set your twitter oauth tokens first!", false);
return;
}
tv = (TextView) findViewById(R.id.welcome_txt);
loginBtn = (Button) findViewById(R.id.login_btn);
logo = (ImageView) findViewById(R.id.imageView1);
mSharedPreferences = getApplicationContext().getSharedPreferences("MyPref",
0);
loginBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Thread th = new Thread(new Runnable() {
public void run() {
loginToTwitter();
}
});
th.start();
}
});
if (!isTwitterLoggedInAlready()) {
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL)) {
uri.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
try {
AccessToken accessToken = twitter.getOAuthAccessToken(requestToken);
Editor e = mSharedPreferences.edit();
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
e.putString(PREF_KEY_OAUTH_SECRET, accessToken.getTokenSecret());
e.putBoolean(PREF_KEY_TWITTER_LOGIN, true);
e.commit();
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
}
catch (Exception e) {
Log.e("Twitter Login Error", "> " + e.getMessage());
}
}
}
}
public void loginToTwitter() {
if (!isTwitterLoggedInAlready()) {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(CONSUMER_KEY);
builder.setOAuthConsumerSecret(CONSUMER_SECRET);
Configuration configuration = builder.build();
TwitterFactory factory = new TwitterFactory(configuration);
twitter = factory.getInstance();
try {
requestToken = twitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);
this.startActivity(new Intent(Intent.ACTION_VIEW, Uri
.parse(requestToken.getAuthenticationURL()))); }
});
}
catch (TwitterException e) {
e.printStackTrace();
}
}
Intent intent = new Intent(TwitterLoginActivity.this, TweetsListActivity.class);
intent.putExtra("tweetsdata",tweetsData);
startActivity(intent);
finish(); }
private boolean isTwitterLoggedInAlready() {
return mSharedPreferences.getBoolean(PREF_KEY_TWITTER_LOGIN, false);
}
@Override
protected void onResume() {
super.onResume();
}
}
答案 0 :(得分：0)
使用我的更改将onCreate（）末尾的代码放到onResume（）上：
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL)) {
uri.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
try {
AccessToken accessToken = twitter.getOAuthAccessToken(requestToken);
Editor e = mSharedPreferences.edit();
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
e.putString(PREF_KEY_OAUTH_SECRET, accessToken.getTokenSecret());
e.putBoolean(PREF_KEY_TWITTER_LOGIN, true);
e.commit();
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
}
catch (Exception e) {
Log.e("Twitter Login Error", "> " + e.getMessage());
}
}
if (!isTwitterLoggedInAlready()) {
// Goto TweetsListActivity
Intent intent = new Intent(TwitterLoginActivity.this, TweetsListActivity.class);
intent.putExtra("tweetsdata",tweetsData);
startActivity(intent);
finish();
}
另请注意，在第127-128行的代码中，这些行被切换：
startActivity(intent);
intent.putExtra("tweetsdata",tweetsData);
在开始活动之后，无意改变意图。
修改
在web登录的startActivity（）之后也注意到这段代码，这没有任何意义：
TwitterLoginActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Intent intent = new Intent(TwitterLoginActivity.this,
TweetsListActivity.class);
intent.putExtra("tweetsdata",tweetsData);
startActivity(intent);
finish();
}
});
删除此代码。