obtenir problème dans Android listview

Question

je suis en train de code folling dans android

tv=(TextView) findViewById(R.id.ringtone); 
    if (!hasErrors) { 

     setListAdapter(new ArrayAdapter<String>(FindFilesByType.this, R.layout.main, 
       Ringtones)); 

     lv.setOnItemClickListener(new OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> aView, View v, 
        int position, long id) { 
       currentPosition = position; 
       playRingtone(DIRECTORY+Ringtones.get(position)); 
      } 
     }); 

mais je reçois Logcat suite et mon application étroite avec force près

 
04-27 11:05:08.212: INFO/ActivityManager(52): Starting activity: Intent { cmp=android.com.testHTML/.FindFilesByType } 
04-27 11:05:08.353: INFO/NotificationService(52): enqueueToast pkg=android.com.testHTML callback=android.app.ITransientNotification$Stub$Proxy@4394f760 duration=0 
04-27 11:05:08.454: ERROR/ArrayAdapter(715): You must supply a resource ID for a TextView 
04-27 11:05:08.454: WARN/dalvikvm(715): threadid=3: thread exiting with uncaught exception (group=0x4001aa28) 
04-27 11:05:08.454: ERROR/AndroidRuntime(715): Uncaught handler: thread main exiting due to uncaught exception 
04-27 11:05:08.473: ERROR/AndroidRuntime(715): java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:347) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.AbsListView.obtainView(AbsListView.java:1273) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.ListView.makeAndAddView(ListView.java:1658) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.ListView.fillDown(ListView.java:637) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.ListView.fillFromTop(ListView.java:694) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.ListView.layoutChildren(ListView.java:1516) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.AbsListView.onLayout(AbsListView.java:1112) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.view.View.layout(View.java:6569) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1108) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.LinearLayout.onLayout(LinearLayout.java:920) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.view.View.layout(View.java:6569) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.FrameLayout.onLayout(FrameLayout.java:333) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.view.View.layout(View.java:6569) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.LinearLayout.layoutVertical(LinearLayout.java:998) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.LinearLayout.onLayout(LinearLayout.java:918) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.view.View.layout(View.java:6569) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.FrameLayout.onLayout(FrameLayout.java:333) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.view.View.layout(View.java:6569) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.view.ViewRoot.performTraversals(ViewRoot.java:979) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1613) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.os.Looper.loop(Looper.java:123) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.app.ActivityThread.main(ActivityThread.java:4203) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at java.lang.reflect.Method.invoke(Method.java:521) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at dalvik.system.NativeStart.main(Native Method) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715): Caused by: java.lang.ClassCastException: android.widget.LinearLayout 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:340) 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  ... 30 more 
04-27 11:05:08.493: INFO/Process(52): Sending signal. PID: 715 SIG: 3 
04-27 11:05:08.493: INFO/dalvikvm(715): threadid=7: reacting to signal 3 
04-27 11:05:08.503: ERROR/dalvikvm(715): Unable to open stack trace file '/data/anr/traces.txt': Permission denied 
04-27 11:05:13.472: INFO/Process(715): Sending signal. PID: 715 SIG: 9 
04-27 11:05:13.503: INFO/ActivityManager(52): Process android.com.testHTML (pid 715) has died. 
04-27 11:05:13.512: INFO/WindowManager(52): WIN DEATH: Window{43885018 android.com.testHTML/android.com.testHTML.testHTMLActivity paused=false} 
04-27 11:05:13.512: INFO/WindowManager(52): WIN DEATH: Window{43933640 Toast paused=false} 
04-27 11:05:13.512: INFO/WindowManager(52): WIN DEATH: Window{439071b0 android.com.testHTML/android.com.testHTML.FindFilesByType paused=false} 
04-27 11:05:13.592: INFO/ActivityManager(52): Start proc android.com.testHTML for activity android.com.testHTML/.testHTMLActivity: pid=750 uid=10024 gids={3003, 1015} 
04-27 11:05:13.784: INFO/jdwp(750): received file descriptor 20 from ADB 
04-27 11:05:13.913: WARN/UsageStats(52): Something wrong here, didn't expect android.com.testHTML to be resumed 
04-27 11:05:14.503: WARN/InputManagerService(52): Got RemoteException sending setActive(false) notification to pid 715 uid 10024 
04-27 11:05:14.643: INFO/ActivityManager(52): Displayed activity android.com.testHTML/.testHTMLActivity: 1139 ms (total 6398 ms) 

ce qui est mal, je suis en train de faire?

Merci à l'avance

Answer 1

Le logcat indique clairement que vous devez fournir l'identifiant de ressource pour un textview, où que ce que vous fournissez est un LinearLayout (Ma conjecture depuis qu'elle lance ClassCastException) Je crois que le main.xml est une linearlayout et non une textview. Au lieu de cela essayez R.id.ringtone

Answer 2

problème Vous est décrit dans ces lignes:

11:05:08.473: ERROR/AndroidRuntime(715): Caused by: java.lang.ClassCastException: android.widget.LinearLayout 
04-27 11:05:08.473: ERROR/AndroidRuntime(715):  at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:340) 

Cela signifie probablement que vous utilisez quelque chose comme LinearLayout, alors qu'il est pas.
(la plupart du temps vous obtenez un ClassCastException que vous faites quelque chose comme
foobar = (LinearLayout) someCode();)

Answer 3

bien ami votre problème est que vous utilisez r.layout.main pour la ligne de la liste.

vous devez créer une mise en page separete de listrow où vous ne parlez que textview et passer comme une mise en page votre erreur est sur cette ligne

setListAdapter(new ArrayAdapter<String>(FindFilesByType.this, R.layout.main, 
       Ringtones)); 

créer une mise en page listrow.xml dire

<?xml version="1.0" encoding="utf-8"?> 
<TexView 
..... 
/> 

et changer votre ligne

setListAdapter(new ArrayAdapter<String>(FindFilesByType.this, R.layout.listrow, 
        Ringtones));