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Editorial Team
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Asked: 2026-05-29T07:37:48+00:00

I am trying to write a parser that parses out HTML times for bus

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I am trying to write a parser that parses out HTML times for bus routes.
But im having a problem getting the list to show up with a while loop.
I if use

Content = extractor.BusRoutes.get(0);
Content = extractor.BusRoutes.get(1);

I can get them to show up in a list by using a text view in android, but I want a list.

I can get a list if i go

setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, busroutearray));

But thats if i have an XML already populated with the items, which i cant use easily.

the loop i am doing now is 

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);



    ArrayList<String> busroutearray = new ArrayList<String>();

    int x = 0;
    while(x > 37){
        busroutearray.add(x, extractor.BusRoutes.get(x));
    x++;
    }

setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, busroutearray));

I can not figure out why it wont display, is there a better way to do this? the “x” is the spot in the array from 0 to 37.

Here is the LogCat

02-08 16:45:27.222: D/dalvikvm(1882): GC_EXTERNAL_ALLOC freed 52K, 54% free 2487K/5379K, external 1596K/2108K, paused 46ms
02-08 16:45:32.320: D/AndroidRuntime(1882): Shutting down VM
02-08 16:45:32.320: W/dalvikvm(1882): threadid=1: thread exiting with uncaught exception (group=0x40015578)
02-08 16:45:32.324: E/AndroidRuntime(1882): FATAL EXCEPTION: main
02-08 16:45:32.324: E/AndroidRuntime(1882): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.taylordev.nextstop/com.taylordev.nextstop.BusRoutes}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.os.Handler.dispatchMessage(Handler.java:99)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.os.Looper.loop(Looper.java:123)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.app.ActivityThread.main(ActivityThread.java:3687)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at java.lang.reflect.Method.invokeNative(Native Method)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at java.lang.reflect.Method.invoke(Method.java:507)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at dalvik.system.NativeStart.main(Native Method)
02-08 16:45:32.324: E/AndroidRuntime(1882): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.app.ListActivity.onContentChanged(ListActivity.java:243)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:212)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.app.Activity.setContentView(Activity.java:1657)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at com.taylordev.nextstop.BusRoutes.onCreate(BusRoutes.java:50)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-08 16:45:32.324: E/AndroidRuntime(1882):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
02-08 16:45:32.324: E/AndroidRuntime(1882):     ... 11 more
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1 Answer

  1. Editorial Team
    int x = 0;
    while(x > 37){
        busroutearray.add(x, extractor.BusRoutes.get(x));
    x++;
    }

    You never enter in your loop because you have x=0 and then the set the condition in the while loop to x > 37 (which is false). Maybe you’ll want to try x < 37 to actually get in your loop.

    EDIT:
    For that exception, your activity BusRoutes probably extends ListActivity and you set a different layout with setContentView(), a layout that doesn’t have the proper ListView element. If you extend ListActivity and set a different layout whith the method setContentView(), in that layout, you must have a ListView element with the id :

    android:id="@android:id/list"

    so that the android system can know which ListView element to bind to the ListActivity. If this doesn’t solve the exception please post the code for the BusRoutes, at least the onCreate() method.

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