Kendi Liste Görünümü Düzeni Oluşturmak - "LinearLayout android.widget.TextView için döküm olamaz"

Question

Sadece bazı Android öğretici videoları içine almak için izliyorum. Şu anda ListViews ile ilgileniyorum ve kendi ListView düzenimi oluşturmak istiyorum. öğretici dayanarak benim kodu (MainActivity parçası) olduğu gibi görünür:

//  ListAdapter listAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, favoriteTVShows); 
     ListAdapter listAdapter = new ArrayAdapter<String>(this, R.layout.row_layout, favoriteTVShows); 
     ListView listView = (ListView) findViewById(R.id.lv_mainListView); 
     listView.setAdapter(listAdapter); 
     listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
       String tvShowPicked = "You picked: " + String.valueOf(parent.getItemAtPosition(position)); 
       Toast.makeText(MainActivity.this, tvShowPicked, Toast.LENGTH_SHORT).show(); 
      } 
     }); 
    } 

giren ilk çıkar yorumladı hattını (simple_list_item_1) çalıştığını kullanılarak fakat kendi düzeni (2 hat) ne yazık ki değil.

Bu

benim row_layout.xml geçerli:

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" 
    tools:context="de.oetzi.introductionlistviews.MainActivity" 
    android:id="@+id/linearLayout1"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/textView1" 
     android:textSize="30sp" 
     android:textStyle="bold" 
     android:padding="15dp"/> 

</LinearLayout> 

Son olarak, funnies şey StackTrace ... arada, başka yeni soru: Nasıl theh stacktrace türetebileceğimiz hangi satırın hangi sınıfta kötülük nedir?

04-14 17:17:47.269 406-406/de.oetzi.introductionlistviews E/ArrayAdapter: You must supply a resource ID for a TextView 04-14 17:17:47.272 406-406/de.oetzi.introductionlistviews D/AndroidRuntime: Shutting down VM 04-14 17:17:47.275 406-406/de.oetzi.introductionlistviews E/AndroidRuntime: FATAL EXCEPTION: main 
                      Process: de.oetzi.introductionlistviews, PID: 406 
                      java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView 
                       at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:386) 
                       at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362) 
                       at android.widget.AbsListView.obtainView(AbsListView.java:2349) 
                       at android.widget.ListView.makeAndAddView(ListView.java:1864) 
                       at android.widget.ListView.fillDown(ListView.java:698) 
                       at android.widget.ListView.fillFromTop(ListView.java:759) 
                       at android.widget.ListView.layoutChildren(ListView.java:1673) 
                       at android.widget.AbsListView.onLayout(AbsListView.java:2153) 
                       at android.view.View.layout(View.java:15678) 
                       at android.view.ViewGroup.layout(ViewGroup.java:5039) 
                       at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) 
                       at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) 
                       at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) 
                       at android.view.View.layout(View.java:15678) 
                       at android.view.ViewGroup.layout(ViewGroup.java:5039) 
                       at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:122) 
                       at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42) 
                       at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1170) 
                       at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:814) 
                       at android.view.View.layout(View.java:15678) 
                       at android.view.ViewGroup.layout(ViewGroup.java:5039) 
                       at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) 
                       at android.widget.FrameLayout.onLayout(FrameLayout.java:514) 
                       at android.view.View.layout(View.java:15678) 
                       at android.view.ViewGroup.layout(ViewGroup.java:5039) 
                       at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) 
                       at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) 
                       at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) 
                       at android.view.View.layout(View.java:15678) 
                       at android.view.ViewGroup.layout(ViewGroup.java:5039) 
                       at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) 
                       at android.widget.FrameLayout.onLayout(FrameLayout.java:514) 
                       at android.view.View.layout(View.java:15678) 
                       at android.view.ViewGroup.layout(ViewGroup.java:5039) 
                       at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) 
                       at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) 
                       at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) 
                       at android.view.View.layout(View.java:15678) 
                       at android.view.ViewGroup.layout(ViewGroup.java:5039) 
                       at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) 
                       at android.widget.FrameLayout.onLayout(FrameLayout.java:514) 
                       at android.view.View.layout(View.java:15678) 
                       at android.view.ViewGroup.layout(ViewGroup.java:5039) 
                       at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2086) 
                       at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843) 
                       at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061) 
                       at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5891) 
                       at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) 
                       at android.view.Choreographer.doCallbacks(Choreographer.java:580) 
                       at android.view.Choreographer.doFrame(Choreographer.java:550) 
                       at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 
                       at android.os.Handler.handleCallback(Handler.java:739) 
                       at android.os.Handler.dispatchMessage(Handler.java:95) 
                       at android.os.Looper.loop(Looper.java:135) 
                       at android.app.ActivityThread.main(ActivityThread.java:5293) 
                       at java.lang.reflect.Method.invoke(Native Method) 
                       at java.lang.reflect.Method.invoke(Method.java:372) 
                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) 
                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699) 
                      Caused by: java.lang.ClassCastException: android.widget.LinearLayout cannot be cast to android.widget.TextView 
                       at android.widge 

Answer 1

Bunun nedeni, verilerinizi yalnızca bir görünüm öğesine yerleştirebilmesidir. Dolayısıyla, düzeninizde bir öğe belirtmeniz gerekir (sizin durumunuzda bir TextView). Bu gibi görünmek xml dosyanızı değiştirin:

<TextView 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/textView1" 
    android:textSize="30sp" 
    android:textStyle="bold" 
    android:padding="15dp"/> 

Answer 2

değişiklik adaptör -

ArrayAdapter listAdapter = new ArrayAdapter<String>(this, R.layout.row_layout,R.id.textView1, countryArray); 
    ListView listView = (ListView) findViewById(R.id.listview); 
    listView.setAdapter(listAdapter);