CODEWITHSUNDEEP
androidjsonandroid-listviewandroid-asynctaskandroid-adapter
Zac Canoy
Zac Canoy

Reputation: 102

Why does my application force close when getting and parsing JSON data?

First off, I'm a noob. I'm probably not handling the AsyncTask properly, but that's why I'm here!

I'm trying to make an activity that gets, parses, and displays values from JSON data. For now I'm using Twitter as a placeholder, but I'm going to use Youtube's GData. I really don't know much about Android's JSON library, or Async Task, so those are the first places I looked for problems. I couldn't find any myself.

NOTE: I do have internet access permissions in the manifest.

This is my class for the activity.

public class MainActivity extends ListActivity {

    List<String> videos;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        videos = new ArrayList<String>();
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        new LoadVideos().execute("http://twitter.com/statuses/user_timeline/zacpac2020.json");
    }

    private class LoadVideos extends AsyncTask<String, Integer, String> {

        @Override
        protected String doInBackground(String... params) {
            final ListView listview = (ListView) findViewById(R.id.listview);

            StringBuilder builder = new StringBuilder();
            HttpClient client = new DefaultHttpClient();
            HttpGet httpGet = new HttpGet(params[0]);
            try {
                HttpResponse response = client.execute(httpGet);
                StatusLine statusLine = response.getStatusLine();
                int statusCode = statusLine.getStatusCode();
                if (statusCode == 200) {
                    HttpEntity entity = response.getEntity();
                    InputStream content = entity.getContent();
                    BufferedReader reader = new BufferedReader(new InputStreamReader(content));
                    String line;
                    while ((line = reader.readLine()) != null) {
                        builder.append(line);
                    }
                } else {
                    Log.e("JSON Parsing", "Failed to download the JSON file.");
                    System.err.println("Failed to download JSON file.");
                }
            } catch (ClientProtocolException e) {
                e.printStackTrace();
                System.err.println("ClientProtocolException in LoadVideos");
            } catch (IOException e) {
                e.printStackTrace();
                System.err.println("ClientProtocolException in LoadVideos");
            }

            String data = builder.toString();
            try {
                JSONArray jsonArray = new JSONArray(data);
                Log.i("Parse JSON", 
                        "Number of entries: " + jsonArray.length());
                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject jsonObject = jsonArray.getJSONObject(i);
                    videos.add(jsonObject.toString());
                }
            } catch(Exception e) {
                e.printStackTrace();
            }

            final ArrayAdapter<String> arrayAdapter =      
                    new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1, videos);
            listview.setAdapter(arrayAdapter);

            return "All Done!";
        }
    }

}

The LogCat Output

Note that this output may be from previous runs:

05-05 18:29:10.192: D/dalvikvm(11237): Debugger has detached; object registry had 1 entries
05-05 20:25:26.066: D/AndroidRuntime(15976): Shutting down VM
05-05 20:25:26.066: W/dalvikvm(15976): threadid=1: thread exiting with uncaught exception (group=0x41640930)
05-05 20:25:26.073: E/AndroidRuntime(15976): FATAL EXCEPTION: main
05-05 20:25:26.073: E/AndroidRuntime(15976): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aer.biblealive/com.aer.biblealive.MainActivity}: android.os.NetworkOnMainThreadException
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2308)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.app.ActivityThread.access$600(ActivityThread.java:154)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1248)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.os.Looper.loop(Looper.java:137)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.app.ActivityThread.main(ActivityThread.java:5235)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at java.lang.reflect.Method.invokeNative(Native Method)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at java.lang.reflect.Method.invoke(Method.java:511)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at dalvik.system.NativeStart.main(Native Method)
05-05 20:25:26.073: E/AndroidRuntime(15976): Caused by: android.os.NetworkOnMainThreadException
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at java.net.InetAddress.getAllByName(InetAddress.java:214)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at com.aer.biblealive.MainActivity.onCreate(MainActivity.java:45)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.app.Activity.performCreate(Activity.java:5104)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-05 20:25:26.073: E/AndroidRuntime(15976):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2262)
05-05 20:25:26.073: E/AndroidRuntime(15976):    ... 11 more
05-05 20:26:56.433: D/AndroidRuntime(16674): Shutting down VM
05-05 20:26:56.433: W/dalvikvm(16674): threadid=1: thread exiting with uncaught exception (group=0x41640930)
05-05 20:26:56.433: E/AndroidRuntime(16674): FATAL EXCEPTION: main
05-05 20:26:56.433: E/AndroidRuntime(16674): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aer.biblealive/com.aer.biblealive.MainActivity}: android.os.NetworkOnMainThreadException
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2308)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.app.ActivityThread.access$600(ActivityThread.java:154)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1248)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.os.Looper.loop(Looper.java:137)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.app.ActivityThread.main(ActivityThread.java:5235)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at java.lang.reflect.Method.invokeNative(Native Method)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at java.lang.reflect.Method.invoke(Method.java:511)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at dalvik.system.NativeStart.main(Native Method)
05-05 20:26:56.433: E/AndroidRuntime(16674): Caused by: android.os.NetworkOnMainThreadException
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at java.net.InetAddress.getAllByName(InetAddress.java:214)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at com.aer.biblealive.MainActivity.onCreate(MainActivity.java:45)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.app.Activity.performCreate(Activity.java:5104)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-05 20:26:56.433: E/AndroidRuntime(16674):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2262)
05-05 20:26:56.433: E/AndroidRuntime(16674):    ... 11 more
05-05 20:43:01.972: D/AndroidRuntime(17355): Shutting down VM
05-05 20:43:01.972: W/dalvikvm(17355): threadid=1: thread exiting with uncaught exception (group=0x41640930)
05-05 20:43:01.995: E/AndroidRuntime(17355): FATAL EXCEPTION: main
05-05 20:43:01.995: E/AndroidRuntime(17355): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aer.biblealive/com.aer.biblealive.MainActivity}: android.os.NetworkOnMainThreadException
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2308)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.app.ActivityThread.access$600(ActivityThread.java:154)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1248)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.os.Looper.loop(Looper.java:137)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.app.ActivityThread.main(ActivityThread.java:5235)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at java.lang.reflect.Method.invokeNative(Native Method)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at java.lang.reflect.Method.invoke(Method.java:511)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at dalvik.system.NativeStart.main(Native Method)
05-05 20:43:01.995: E/AndroidRuntime(17355): Caused by: android.os.NetworkOnMainThreadException
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at java.net.InetAddress.getAllByName(InetAddress.java:214)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at com.aer.biblealive.MainActivity$1.run(MainActivity.java:50)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at java.lang.Thread.run(Thread.java:856)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at com.aer.biblealive.MainActivity.onCreate(MainActivity.java:83)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.app.Activity.performCreate(Activity.java:5104)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-05 20:43:01.995: E/AndroidRuntime(17355):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2262)
05-05 20:43:01.995: E/AndroidRuntime(17355):    ... 11 more
05-05 21:02:50.448: D/AndroidRuntime(18004): Shutting down VM
05-05 21:02:50.448: W/dalvikvm(18004): threadid=1: thread exiting with uncaught exception (group=0x41640930)
05-05 21:02:50.448: E/AndroidRuntime(18004): FATAL EXCEPTION: main
05-05 21:02:50.448: E/AndroidRuntime(18004): android.app.SuperNotCalledException: Activity {com.aer.biblealive/com.aer.biblealive.MainActivity} did not call through to super.onCreate()
05-05 21:02:50.448: E/AndroidRuntime(18004):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2264)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at android.app.ActivityThread.access$600(ActivityThread.java:154)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1248)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at android.os.Looper.loop(Looper.java:137)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at android.app.ActivityThread.main(ActivityThread.java:5235)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at java.lang.reflect.Method.invokeNative(Native Method)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at java.lang.reflect.Method.invoke(Method.java:511)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
05-05 21:02:50.448: E/AndroidRuntime(18004):    at dalvik.system.NativeStart.main(Native Method)
05-05 21:06:36.831: D/libEGL(18374): loaded /vendor/lib/egl/libEGL_POWERVR_SGX540_120.so
05-05 21:06:36.870: D/libEGL(18374): loaded /vendor/lib/egl/libGLESv1_CM_POWERVR_SGX540_120.so
05-05 21:06:36.878: D/libEGL(18374): loaded /vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so
05-05 21:06:37.542: D/OpenGLRenderer(18374): Enabling debug mode 0
05-05 21:06:37.558: I/Choreographer(18374): Skipped 54 frames!  The application may be doing too much work on its main thread.
05-05 21:16:18.816: D/libEGL(18958): loaded /vendor/lib/egl/libEGL_POWERVR_SGX540_120.so
05-05 21:16:18.855: D/libEGL(18958): loaded /vendor/lib/egl/libGLESv1_CM_POWERVR_SGX540_120.so
05-05 21:16:18.855: D/libEGL(18958): loaded /vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so
05-05 21:16:19.300: D/OpenGLRenderer(18958): Enabling debug mode 0
05-05 21:16:19.300: I/Choreographer(18958): Skipped 38 frames!  The application may be doing too much work on its main thread.
05-05 21:16:20.487: E/JSON Parsing(18958): Failed to download the JSON file.
05-05 21:16:20.503: W/System.err(18958): org.json.JSONException: End of input at character 0 of 
05-05 21:16:20.527: W/System.err(18958):    at org.json.JSONTokener.syntaxError(JSONTokener.java:450)
05-05 21:16:20.527: W/System.err(18958):    at org.json.JSONTokener.nextValue(JSONTokener.java:97)
05-05 21:16:20.527: W/System.err(18958):    at org.json.JSONArray.<init>(JSONArray.java:87)
05-05 21:16:20.534: W/System.err(18958):    at org.json.JSONArray.<init>(JSONArray.java:103)
05-05 21:16:20.534: W/System.err(18958):    at com.aer.biblealive.MainActivity$LoadVideos.doInBackground(MainActivity.java:145)
05-05 21:16:20.534: W/System.err(18958):    at com.aer.biblealive.MainActivity$LoadVideos.doInBackground(MainActivity.java:1)
05-05 21:16:20.534: W/System.err(18958):    at android.os.AsyncTask$2.call(AsyncTask.java:287)
05-05 21:16:20.534: W/System.err(18958):    at java.util.concurrent.FutureTask.run(FutureTask.java:234)
05-05 21:16:20.534: W/System.err(18958):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
05-05 21:16:20.534: W/System.err(18958):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
05-05 21:16:20.534: W/System.err(18958):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
05-05 21:16:20.534: W/System.err(18958):    at java.lang.Thread.run(Thread.java:856)
05-05 21:16:20.534: W/dalvikvm(18958): threadid=11: thread exiting with uncaught exception (group=0x41640930)
05-05 21:16:20.534: E/AndroidRuntime(18958): FATAL EXCEPTION: AsyncTask #1
05-05 21:16:20.534: E/AndroidRuntime(18958): java.lang.RuntimeException: An error occured while executing doInBackground()
05-05 21:16:20.534: E/AndroidRuntime(18958):    at android.os.AsyncTask$3.done(AsyncTask.java:299)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at java.util.concurrent.FutureTask.run(FutureTask.java:239)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at java.lang.Thread.run(Thread.java:856)
05-05 21:16:20.534: E/AndroidRuntime(18958): Caused by: java.lang.NullPointerException
05-05 21:16:20.534: E/AndroidRuntime(18958):    at com.aer.biblealive.MainActivity$LoadVideos.doInBackground(MainActivity.java:158)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at com.aer.biblealive.MainActivity$LoadVideos.doInBackground(MainActivity.java:1)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at android.os.AsyncTask$2.call(AsyncTask.java:287)
05-05 21:16:20.534: E/AndroidRuntime(18958):    at java.util.concurrent.FutureTask.run(FutureTask.java:234)
05-05 21:16:20.534: E/AndroidRuntime(18958):    ... 4 more
05-05 21:35:41.362: D/AndroidRuntime(19655): Shutting down VM
05-05 21:35:41.362: W/dalvikvm(19655): threadid=1: thread exiting with uncaught exception (group=0x41640930)
05-05 21:35:41.394: E/AndroidRuntime(19655): FATAL EXCEPTION: main
05-05 21:35:41.394: E/AndroidRuntime(19655): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aer.biblealive/com.aer.biblealive.MainActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2308)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.ActivityThread.access$600(ActivityThread.java:154)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1248)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.os.Looper.loop(Looper.java:137)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.ActivityThread.main(ActivityThread.java:5235)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at java.lang.reflect.Method.invokeNative(Native Method)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at java.lang.reflect.Method.invoke(Method.java:511)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at dalvik.system.NativeStart.main(Native Method)
05-05 21:35:41.394: E/AndroidRuntime(19655): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.ListActivity.onContentChanged(ListActivity.java:243)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:335)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.Activity.setContentView(Activity.java:1881)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at com.aer.biblealive.MainActivity.onCreate(MainActivity.java:37)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.Activity.performCreate(Activity.java:5104)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-05 21:35:41.394: E/AndroidRuntime(19655):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2262)
05-05 21:35:41.394: E/AndroidRuntime(19655):    ... 11 more

The latest crash:

05-05 21:42:59.503: D/AndroidRuntime(20362): Shutting down VM
05-05 21:42:59.503: W/dalvikvm(20362): threadid=1: thread exiting with uncaught exception (group=0x41640930)
05-05 21:42:59.511: E/AndroidRuntime(20362): FATAL EXCEPTION: main
05-05 21:42:59.511: E/AndroidRuntime(20362): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aer.biblealive/com.aer.biblealive.MainActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2308)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.ActivityThread.access$600(ActivityThread.java:154)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1248)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.os.Looper.loop(Looper.java:137)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.ActivityThread.main(ActivityThread.java:5235)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at java.lang.reflect.Method.invokeNative(Native Method)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at java.lang.reflect.Method.invoke(Method.java:511)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at dalvik.system.NativeStart.main(Native Method)
05-05 21:42:59.511: E/AndroidRuntime(20362): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.ListActivity.onContentChanged(ListActivity.java:243)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:335)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.Activity.setContentView(Activity.java:1881)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at com.aer.biblealive.MainActivity.onCreate(MainActivity.java:41)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.Activity.performCreate(Activity.java:5104)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-05 21:42:59.511: E/AndroidRuntime(20362):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2262)
05-05 21:42:59.511: E/AndroidRuntime(20362):    ... 11 more

It looks like I have the network downloading something on the main thread. But I don't think I do...

Upvotes: 0

Views: 392

Answers (1)

ianhanniballake
ianhanniballake

Reputation: 200120

Because your Activity is a ListActivity it is giving the following error:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aer.biblealive/com.aer.biblealive.MainActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'

Make sure your R.layout.activity_main has a listview that looks like:

<ListView android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"/>

With the important bit being the android:id attribute.

You can also change your extends ListActivity to extends Activity and handle the ListView yourself (as you seem to be doing).

Upvotes: 1

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