Unfortunately, AppName has stopped when I try to run code Twitter Android

Question

Possible Duplicate:
Android - android.os.NetworkOnMainThreadException

I follow in web http://codehenge.net/blog/2011/05/android-programming-tutorial-a-simple-twitter-feed-reader/ I try to run this sample code but when Emulator Open Application , Emulator show alert dialog "Unfortunately, AppName has stopped" Thx for help >.< Example.java

package facebook.appwall;

import java.net.URL;
import java.util.ArrayList;

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.parser.JSONParser;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
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 Example extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        ArrayList<Tweet> tweets = getTweets("android", 1);

        ListView listView = (ListView) findViewById(R.id.ListViewId);
        listView.setAdapter(new UserItemAdapter(this, R.layout.listitem1, 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.listitem1, 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 parser=new JSONParser();

        try {
            Object obj = parser.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;
        }
    }
}

main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent">
<ListView android:id="@+id/ListViewId" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content"/>
</LinearLayout>

listview1.xml

   <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_height="wrap_content" 
    android:gravity="left|center" 
    android:layout_width="wrap_content" 
    android:paddingBottom="5px" 
    android:paddingTop="5px" 
    android:paddingLeft="5px">
    <ImageView android:id="@+id/avatar" 
        android:layout_width="wrap_content" 
        android:layout_height="fill_parent" 
        android:layout_marginRight="6dip" 
        android:src="@drawable/ic_launcher"/>
    <LinearLayout android:orientation="vertical" 
        android:layout_width="0dip" 
        android:layout_weight="1" 
        android:layout_height="fill_parent">
        <TextView android:id="@+id/username" 
            android:layout_width="wrap_content" 
            android:layout_height="wrap_content" 
            android:gravity="center"/>
        <TextView android:id="@+id/message" 
            android:layout_width="wrap_content"
             android:layout_height="wrap_content" 
             android:layout_marginLeft="10px" 
             android:textColor="#0099CC"/>
    </LinearLayout>
</LinearLayout>

logcat

12-18 22:32:32.562: E/dalvikvm(8406): Could not find class 'org.json.simple.parser.JSONParser', referenced from method facebook.appwall.Example.getTweets
12-18 22:32:32.582: W/dalvikvm(8406): VFY: unable to resolve new-instance 927 (Lorg/json/simple/parser/JSONParser;) in Lfacebook/appwall/Example;
12-18 22:32:32.582: D/dalvikvm(8406): VFY: replacing opcode 0x22 at 0x0040
12-18 22:32:32.592: D/dalvikvm(8406): DexOpt: unable to opt direct call 0x17ae at 0x42 in Lfacebook/appwall/Example;.getTweets
12-18 22:32:33.282: D/dalvikvm(8406): GC_CONCURRENT freed 111K, 8% free 2679K/2908K, paused 180ms+10ms, total 357ms
12-18 22:32:33.282: D/dalvikvm(8406): WAIT_FOR_CONCURRENT_GC blocked 159ms
12-18 22:32:33.292: I/dalvikvm-heap(8406): Grow heap (frag case) to 3.334MB for 635812-byte allocation
12-18 22:32:33.382: D/dalvikvm(8406): GC_FOR_ALLOC freed 4K, 7% free 3295K/3532K, paused 86ms, total 89ms
12-18 22:32:33.772: W/System.err(8406): android.os.NetworkOnMainThreadException
12-18 22:32:33.772: W/System.err(8406):     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
12-18 22:32:33.792: W/System.err(8406):     at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
12-18 22:32:33.792: W/System.err(8406):     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
12-18 22:32:33.801: W/System.err(8406):     at java.net.InetAddress.getAllByName(InetAddress.java:214)
12-18 22:32:33.801: W/System.err(8406):     at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
12-18 22:32:33.812: W/System.err(8406):     at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
12-18 22:32:33.812: W/System.err(8406):     at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
12-18 22:32:33.812: W/System.err(8406):     at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
12-18 22:32:33.822: W/System.err(8406):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
12-18 22:32:33.833: W/System.err(8406):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:653)
12-18 22:32:33.852: W/System.err(8406):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:627)
12-18 22:32:33.852: W/System.err(8406):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:616)
12-18 22:32:33.872: W/System.err(8406):     at facebook.appwall.Example.getTweets(Example.java:102)
12-18 22:32:33.882: W/System.err(8406):     at facebook.appwall.Example.onCreate(Example.java:37)
12-18 22:32:33.902: W/System.err(8406):     at android.app.Activity.performCreate(Activity.java:5104)
12-18 22:32:33.902: W/System.err(8406):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
12-18 22:32:33.922: W/System.err(8406):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
12-18 22:32:33.922: W/System.err(8406):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
12-18 22:32:33.922: W/System.err(8406):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
12-18 22:32:33.922: W/System.err(8406):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
12-18 22:32:33.942: W/System.err(8406):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-18 22:32:33.942: W/System.err(8406):     at android.os.Looper.loop(Looper.java:137)
12-18 22:32:33.952: W/System.err(8406):     at android.app.ActivityThread.main(ActivityThread.java:5039)
12-18 22:32:33.962: W/System.err(8406):     at java.lang.reflect.Method.invokeNative(Native Method)
12-18 22:32:33.962: W/System.err(8406):     at java.lang.reflect.Method.invoke(Method.java:511)
12-18 22:32:33.973: W/System.err(8406):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-18 22:32:33.973: W/System.err(8406):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-18 22:32:33.992: W/System.err(8406):     at dalvik.system.NativeStart.main(Native Method)
12-18 22:32:33.992: D/AndroidRuntime(8406): Shutting down VM
12-18 22:32:34.002: W/dalvikvm(8406): threadid=1: thread exiting with uncaught exception (group=0x40a70930)
12-18 22:32:34.062: E/AndroidRuntime(8406): FATAL EXCEPTION: main
12-18 22:32:34.062: E/AndroidRuntime(8406): java.lang.NoClassDefFoundError: org.json.simple.parser.JSONParser
12-18 22:32:34.062: E/AndroidRuntime(8406):     at facebook.appwall.Example.getTweets(Example.java:108)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at facebook.appwall.Example.onCreate(Example.java:37)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at android.app.Activity.performCreate(Activity.java:5104)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at android.os.Looper.loop(Looper.java:137)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at android.app.ActivityThread.main(ActivityThread.java:5039)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at  java.lang.reflect.Method.invokeNative(Native Method)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at java.lang.reflect.Method.invoke(Method.java:511)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-18 22:32:34.062: E/AndroidRuntime(8406):     at dalvik.system.NativeStart.main(Native Method)

**search** before posting a question. – njzk2 Dec 18 '12 at 16:11 — njzk2, Dec 18 '12 at 16:11

score 0 · Answer 1 · answered Dec 18 '12 at 15:52

 android.os.NetworkOnMainThreadException
12-18 22:32:33.772: W/System.err(8406):     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)

Move your network acitivity (getTweets()) out of main thread. Use something like AsyncTask

score 0 · Answer 2 · answered Dec 18 '12 at 15:53

NetworkOnMainThreadException :

The exception that is thrown when an application attempts to perform a networking operation on its main thread.

means you are trying to run network operation from UI Thread so put your all network related code inside AsyncTask's doInBackground method and use onPostExecute for updating UI when doInBackground method execution complete

and if your are using API LEVEL 9 or GREATER FROM 9 then add StrictMode in onCreate of Activity to avoid this error

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                 .detectDiskReads()
                 .detectDiskWrites()
                 .detectNetwork()  
                 .penaltyLog()
                 .build());

Unfortunately, AppName has stopped when I try to run code Twitter Android

2 Answers2