JSONParser错误,找不到类. Android的

概述我想在我的Android应用程序中从Twitter获取提要.为了做到这一点,我使用了一些示例代码,现在我无法启动应用程序.这是代码：importorg.apache.http.client.HttpClient;importorg.apache.http.client.ResponseHandler;importorg.apache.http.client.methods.HttpGet;importorg

我想在我的Android应用程序中从Twitter获取提要.为了做到这一点,我使用了一些示例代码,现在我无法启动应用程序.这是代码：

import org.apache.http.clIEnt.httpClIEnt;import org.apache.http.clIEnt.ResponseHandler;import org.apache.http.clIEnt.methods.httpGet;import org.apache.http.impl.clIEnt.BasicResponseHandler;import org.apache.http.impl.clIEnt.DefaulthttpClIEnt;import org.Json.simple.JsONArray;import org.Json.simple.JsONObject;import org.Json.simple.JsONValue;import org.Json.simple.parser.JsONParser;    import androID.app.Activity;    import androID.content.Context;    import androID.graphics.Bitmap;    import androID.graphics.BitmapFactory;    import androID.net.Uri;    import androID.os.Bundle;    import androID.util.Log;    import androID.vIEw.LayoutInflater;    import androID.vIEw.VIEw;    import androID.vIEw.VIEwGroup;    import androID.Widget.ArrayAdapter;    import androID.Widget.ImageVIEw;    import androID.Widget.ListVIEw;    import androID.Widget.TextVIEw;    public class Twitter extends Activity {        @OverrIDe        public voID onCreate(Bundle savedInstanceState) {            super.onCreate(savedInstanceState);            setContentVIEw(R.layout.twitter_layout);            ArrayList<Tweet> tweets = getTweets("androID", 1);            ListVIEw ListVIEw = (ListVIEw) findVIEwByID(R.ID.ListVIEwID);            ListVIEw.setAdapter(new UserItemAdapter(this, R.layout.Listitem, tweets));        }        public class UserItemAdapter extends ArrayAdapter<Tweet> {            private ArrayList<Tweet> tweets;            public UserItemAdapter(Context context, int textVIEwResourceID, ArrayList<Tweet> tweets) {                super(context, textVIEwResourceID, tweets);                this.tweets = tweets;            }            @OverrIDe            public VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) {                VIEw v = convertVIEw;                if (v == null) {                    LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);                    v = vi.inflate(R.layout.Listitem, null);                }                Tweet tweet = tweets.get(position);                if (tweet != null) {                    TextVIEw username = (TextVIEw) v.findVIEwByID(R.ID.username);                    TextVIEw message = (TextVIEw) v.findVIEwByID(R.ID.message);                    ImageVIEw image = (ImageVIEw) v.findVIEwByID(R.ID.avatar);                    if (username != null) {                        username.setText(tweet.username);                    }                    if(message != null) {                        message.setText(tweet.message);                    }                    if(image != null) {                        image.setimageBitmap(getBitmap(tweet.image_url));                    }                }                return v;            }        }        public Bitmap getBitmap(String bitmapUrl) {            try {                URL url = new URL(bitmapUrl);                return BitmapFactory.decodeStream(url.openConnection() .getinputStream());             }            catch(Exception ex) {return null;}        }        public ArrayList<Tweet> getTweets(String searchTerm, int page) {            String searchUrl = "http://search.twitter.com/search.Json?q=@"                                 + searchTerm + "&rpp=100&page=" + page;            ArrayList<Tweet> tweets = new ArrayList<Tweet>();            httpClIEnt clIEnt = new  DefaulthttpClIEnt();            httpGet get = new httpGet(searchUrl);            ResponseHandler<String> responseHandler = new BasicResponseHandler();            String responseBody = null;            try{                responseBody = clIEnt.execute(get, responseHandler);            }catch(Exception ex) {                ex.printstacktrace();            }            JsONObject JsonObject = null;            /*  */            JsONParser pars=new JsONParser();            /*  */            try {                Object obj = pars.parse(responseBody);                JsonObject=(JsONObject)obj;            }catch(Exception ex){                Log.v("TEST","Exception: " + ex.getMessage());            }            JsONArray arr = null;            try {                Object j = JsonObject.get("results");                arr = (JsONArray)j;            }catch(Exception ex){                Log.v("TEST","Exception: " + ex.getMessage());            }            for(Object t : arr) {                Tweet tweet = new Tweet(                        ((JsONObject)t).get("from_user").toString(),                        ((JsONObject)t).get("text").toString(),                        ((JsONObject)t).get("profile_image_url").toString()                        );                tweets.add(tweet);            }            return tweets;        }        public class Tweet {            public String username;            public String message;            public String image_url;            public Tweet(String username, String message, String url) {                this.username = username;                this.message = message;                this.image_url = url;            }        }    }

这是我的LogCat：

05-23 11:34:16.443: E/AndroIDRuntime(25616): FATAL EXCEPTION: main05-23 11:34:16.443: E/AndroIDRuntime(25616): java.lang.NoClassDefFoundError: org.Json.simple.parser.JsONParser05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:2627)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.app.ActivityThread.startActivityNow(ActivityThread.java:2503)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.app.LocalActivityManager.movetoState(LocalActivityManager.java:127)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.Widget.TabHost$IntentContentStrategy.getContentVIEw(TabHost.java:673)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.Widget.TabHost.setCurrentTab(TabHost.java:345)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.Widget.TabHost.onTabSelectionChanged(TabHost.java:138)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.Widget.TabWidget$TabClickListener.onClick(TabWidget.java:453)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.vIEw.VIEw.performClick(VIEw.java:2408)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.vIEw.VIEw$PerformClick.run(VIEw.java:8816)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.os.Handler.handleCallback(Handler.java:587)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.os.Handler.dispatchMessage(Handler.java:92)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.os.Looper.loop(Looper.java:123)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at androID.app.ActivityThread.main(ActivityThread.java:4627)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at java.lang.reflect.Method.invokeNative(Native Method)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at java.lang.reflect.Method.invoke(Method.java:521)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:636)05-23 11:34:16.443: E/AndroIDRuntime(25616):    at dalvik.system.NativeStart.main(Native Method)

我正在使用http://code.google.com/p/json-simple/.

解决方法:

您需要在项目的lib或libs目录中使用Json-simple jar.您可能目前已将其设置为可以将jar用于构建,但不包含在构建的应用程序中.

总结

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