我正在根据教程为Android创建一个Twitter客户端。当我编译它，然后按菜单对twitter进行身份验证时，应用程序突然停止并显示警告“不幸的是，APP已停止”。
以下是该程序的logcat：
12-17 17:02:07.025: E/AndroidRuntime(24713): FATAL EXCEPTION: main
12-17 17:02:07.025: E/AndroidRuntime(24713): java.lang.NoClassDefFoundError: oauth.signpost.commonshttp.CommonsHttpOAuthConsumer
12-17 17:02:07.025: E/AndroidRuntime(24713): at com.tmm.android.twitter.AuthActivity.askOAuth(AuthActivity.java:106)
12-17 17:02:07.025: E/AndroidRuntime(24713): at com.tmm.android.twitter.AuthActivity.access$0(AuthActivity.java:104)
12-17 17:02:07.025: E/AndroidRuntime(24713): at com.tmm.android.twitter.AuthActivity$1.onClick(AuthActivity.java:53)
12-17 17:02:07.025: E/AndroidRuntime(24713): at android.view.View.performClick(View.java:4223)
12-17 17:02:07.025: E/AndroidRuntime(24713): at android.view.View$PerformClick.run(View.java:17275)
12-17 17:02:07.025: E/AndroidRuntime(24713): at android.os.Handler.handleCallback(Handler.java:615)
12-17 17:02:07.025: E/AndroidRuntime(24713): at android.os.Handler.dispatchMessage(Handler.java:92)
12-17 17:02:07.025: E/AndroidRuntime(24713): at android.os.Looper.loop(Looper.java:137)
12-17 17:02:07.025: E/AndroidRuntime(24713): at android.app.ActivityThread.main(ActivityThread.java:4898)
12-17 17:02:07.025: E/AndroidRuntime(24713): at java.lang.reflect.Method.invokeNative(Native Method)
12-17 17:02:07.025: E/AndroidRuntime(24713): at java.lang.reflect.Method.invoke(Method.java:511)
12-17 17:02:07.025: E/AndroidRuntime(24713): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
12-17 17:02:07.025: E/AndroidRuntime(24713): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
12-17 17:02:07.025: E/AndroidRuntime(24713): at dalvik.system.NativeStart.main(Native Method)
这是主要的课程：
package com.tmm.android.twitter;
import oauth.signpost.OAuthProvider;
import oauth.signpost.basic.DefaultOAuthProvider;
import oauth.signpost.commonshttp.CommonsHttpOAuthConsumer;
import twitter4j.Twitter;
import twitter4j.TwitterFactory;
import twitter4j.http.AccessToken;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import com.tmm.android.twitter.appliaction.TwitterApplication;
import com.tmm.android.twitter.util.Constants;
public class AuthActivity extends Activity {
private Twitter twitter;
private OAuthProvider provider;
private CommonsHttpOAuthConsumer consumer;
private String CONSUMER_KEY = "CV78QI1eZAgGe9mMS7A";
private String CONSUMER_SECRET = "zCYkLsHlAVf7DoWJlDbfqeFsghXQCu2dUaFC2O94HQ";
private String CALLBACK_URL = "callback://tweeter";
private Button buttonLogin;
@Override
public void onCreate(Bundle savedInstanceState) {
System.setProperty("http.keepAlive", "false");
super.onCreate(savedInstanceState);
setContentView(R.layout.main_oauth);
//check for saved log in details..
checkForSavedLogin();
//set consumer and provider on teh Application service
getConsumerProvider();
//Define login button and listener
buttonLogin = (Button)findViewById(R.id.ButtonLogin);
buttonLogin.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
askOAuth();
}
});
}
private void checkForSavedLogin() {
// Get Access Token and persist it
AccessToken a = getAccessToken();
if (a==null) return; //if there are no credentials stored then return to usual activity
// initialize Twitter4J
twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
twitter.setOAuthAccessToken(a);
((TwitterApplication)getApplication()).setTwitter(twitter);
startFirstActivity();
finish();
}
/**
* Kick off the activity to display
*/
private void startFirstActivity() {
System.out.println("STARTING FIRST ACTIVITY!");
Intent i = new Intent(this, TweetsActivity.class);
startActivityForResult(i, Constants.ACTIVITY_LATEST_TWEETS);
}
/**
* This method checks the shared prefs to see if we have persisted a user token/secret
* if it has then it logs on using them, otherwise return null
*
* @return AccessToken from persisted prefs
*/
private AccessToken getAccessToken() {
SharedPreferences settings = getSharedPreferences(Constants.PREFS_NAME, MODE_PRIVATE);
String token = settings.getString("accessTokenToken", "");
String tokenSecret = settings.getString("accessTokenSecret", "");
if (token!=null && tokenSecret!=null && !"".equals(tokenSecret) && !"".equals(token)){
return new AccessToken(token, tokenSecret);
}
return null;
}
/**
* Open the browser and asks the user to authorize the app.
* Afterwards, we redirect the user back here!
*/
private void askOAuth() {
try {
consumer = new CommonsHttpOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
provider = new DefaultOAuthProvider("http://twitter.com/oauth/request_token", "http://twitter.com/oauth/access_token", "http://twitter.com/oauth/authorize");
String authUrl = provider.retrieveRequestToken(consumer, CALLBACK_URL);
Toast.makeText(this, "Please authorize this app!", Toast.LENGTH_LONG).show();
setConsumerProvider();
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(authUrl)));
} catch (Exception e) {
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
}
/**
* As soon as the user successfully authorized the app, we are notified
* here. Now we need to get the verifier from the callback URL, retrieve
* token and token_secret and feed them to twitter4j (as well as
* consumer key and secret).
*/
@Override
protected void onResume() {
super.onResume();
System.out.println("RESUMING!!");
if (this.getIntent()!=null && this.getIntent().getData()!=null){
Uri uri = this.getIntent().getData();
if (uri != null && uri.toString().startsWith(CALLBACK_URL)) {
String verifier = uri.getQueryParameter(oauth.signpost.OAuth.OAUTH_VERIFIER);
try {
// this will populate token and token_secret in consumer
provider.retrieveAccessToken(consumer, verifier);
// Get Access Token and persist it
AccessToken a = new AccessToken(consumer.getToken(), consumer.getTokenSecret());
storeAccessToken(a);
// initialize Twitter4J
twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
twitter.setOAuthAccessToken(a);
((TwitterApplication)getApplication()).setTwitter(twitter);
//Log.e("Login", "Twitter Initialised");
startFirstActivity();
} catch (Exception e) {
//Log.e(APP, e.getMessage());
e.printStackTrace();
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}
}
/**
* This method persists the Access Token information so that a user
* is not required to re-login every time the app is used
*
* @param a - the access token
*/
private void storeAccessToken(AccessToken a) {
SharedPreferences settings = getSharedPreferences(Constants.PREFS_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.putString("accessTokenToken", a.getToken());
editor.putString("accessTokenSecret", a.getTokenSecret());
editor.commit();
}
/**
* Get the consumer and provider from the application service (in the case that the
* activity is restarted so the objects are not lost
*/
private void getConsumerProvider() {
OAuthProvider p = ((TwitterApplication)getApplication()).getProvider();
if (p!=null){
provider = p;
}
CommonsHttpOAuthConsumer c = ((TwitterApplication)getApplication()).getConsumer();
if (c!=null){
consumer = c;
}
}
/**
* Set the consumer and provider from the application service (in the case that the
* activity is restarted so the objects are not lost)
*/
private void setConsumerProvider() {
if (provider!=null){
((TwitterApplication)getApplication()).setProvider(provider);
}
if (consumer!=null){
((TwitterApplication)getApplication()).setConsumer(consumer);
}
}
}
任何帮助都会非常感激
答案 0 :(得分：1)
试试这个：
转到项目/属性/ Java构建路径/订单和导出 - 如果您使用它，请确保在Android Dependencies和支持库前面进行检查。标记所有复选框并单击“应用”并清除项目。
希望这有帮助。