title: How to create multiple layout ListViews with CustomAdapter in Android Studio
body: <p>I am trying to create an Quiz in Android Studio. Therefore I want to implement a ListView which displays the question in a TextView and the answer in form of Buttons. </p>
  
  <p>The multiple layouts are needed because a question can have two, three or four answers (Buttons). So in every row there should be a TextView and depending on the answers 2, 3 or 4 Buttons. </p>
  
  <p>This is my CustomAdapter so far. The problem is that this only works for one TextView and I don't know how i can adress the Buttons.</p>
  
  <pre><code>public class CustomAdapter extends ArrayAdapter {
  private QuizItem[] items;
  
  @Override
  public int getViewTypeCount() {
      return 3;
  }
  
  @Override
  public int getItemViewType(int position) {
      return items[position].getCategory();
  }
  
  public CustomAdapter(Context context, int question, QuizItem[] items) {
      super(context, question, items);
      this.items = items;
  }
  
  
  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
      ViewHolder viewHolder = null;
      QuizItem quizItem = items[position];
      int quizItemType = getItemViewType(position);
  
      if (convertView == null) {
  
          if (quizItemType == Config.CATEGORY_TWO_ANSWERS) {
              convertView = LayoutInflater.from(getContext()).inflate(R.layout.two_answers, null);
          } else if (quizItemType == Config.CATEGORY_THREE_ANSWERS) {
              convertView = LayoutInflater.from(getContext()).inflate(R.layout.three_answers, null);
          }
          else{
              convertView = LayoutInflater.from(getContext()).inflate(R.layout.four_answers, null);
          }
  
          TextView textView = (TextView) convertView.findViewById(R.id.textView);
          viewHolder = new ViewHolder(textView);
  
          convertView.setTag(viewHolder);
  
      } else {
          viewHolder = (ViewHolder) convertView.getTag();
      }
  
      viewHolder.getText().setText(quizItem.getQuestion());
      return convertView;
  }}
  </code></pre>
  
  <p>And this is my Main Class where I create some demo date with the for loop: </p>
  
  <pre><code>public class MainActivity extends AppCompatActivity {
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
  
      ListView listView = (ListView) findViewById(R.id.simpleListView);
      final QuizItem[] itemArray = new QuizItem[10];
      int toggle = 0;
  
      for(int i = 0; i &lt; itemArray.length; i++){
  
          if(toggle == 0){
  
              itemArray[i] = new QuizItem("Question " + i, "Answer A", "Answer B");
              toggle = 1;
          }
          else if(toggle == 1){
  
              itemArray[i] = new QuizItem("Question " + i, "Answer A", "Answer B", "Answer C");
              toggle = 2;
          }
          else{
              itemArray[i] = new QuizItem("Question " + i, "Answer A", "Answer B", "Answer C", "Answer D");
              toggle = 0;
          }
      }
  
      CustomAdapter customAdapter = new CustomAdapter(this, R.id.textView, itemArray);
      listView.setAdapter(customAdapter);
  
  }}
  </code></pre>
  
  <p>So how can put the answer text on the Buttons and display the right amount of Buttons?
  I'm very thankful for every information!</p>
  
  <p>EDIT: This is the LogCat</p>
  
  <pre><code>03-28 14:58:48.564  12092-12092/adonis.quiz D/dalvikvm﹕ Late-enabling CheckJNI
  03-28 14:58:48.564  12092-12092/adonis.quiz D/dalvikvm﹕ Try to disable coredump for pid 12092
  03-28 14:58:48.564  12092-12092/adonis.quiz D/dalvikvm﹕ Process 12092 nice name: adonis.quiz
  03-28 14:58:48.564  12092-12092/adonis.quiz D/dalvikvm﹕ Extra Options: not specified
  03-28 14:58:48.684  12092-12092/adonis.quiz W/dalvikvm﹕ VFY: unable to find class referenced in signature (Landroid/view/SearchEvent;)
  03-28 14:58:48.684  12092-12092/adonis.quiz I/dalvikvm﹕ Could not find method android.view.Window$Callback.onSearchRequested, referenced from method android.support.v7.view.WindowCallbackWrapper.onSearchRequested
  03-28 14:58:48.684  12092-12092/adonis.quiz W/dalvikvm﹕ VFY: unable to resolve interface method 14571: Landroid/view/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z
  03-28 14:58:48.684  12092-12092/adonis.quiz D/dalvikvm﹕ VFY: replacing opcode 0x72 at 0x0002
  03-28 14:58:48.684  12092-12092/adonis.quiz I/dalvikvm﹕ Could not find method android.view.Window$Callback.onWindowStartingActionMode, referenced from method android.support.v7.view.WindowCallbackWrapper.onWindowStartingActionMode
  03-28 14:58:48.684  12092-12092/adonis.quiz W/dalvikvm﹕ VFY: unable to resolve interface method 14575: Landroid/view/Window$Callback;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
  03-28 14:58:48.684  12092-12092/adonis.quiz D/dalvikvm﹕ VFY: replacing opcode 0x72 at 0x0002
  03-28 14:58:48.714  12092-12092/adonis.quiz I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.widget.TintTypedArray.getChangingConfigurations
  03-28 14:58:48.714  12092-12092/adonis.quiz W/dalvikvm﹕ VFY: unable to resolve virtual method 463: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
  03-28 14:58:48.714  12092-12092/adonis.quiz D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
  03-28 14:58:48.724  12092-12092/adonis.quiz I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.widget.TintTypedArray.getType
  03-28 14:58:48.724  12092-12092/adonis.quiz W/dalvikvm﹕ VFY: unable to resolve virtual method 485: Landroid/content/res/TypedArray;.getType (I)I
  03-28 14:58:48.724  12092-12092/adonis.quiz D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
  03-28 14:58:48.804  12092-12092/adonis.quiz D/CA/getType﹕ 5
  03-28 14:58:48.804  12092-12092/adonis.quiz D/CA/getType﹕ 5
  03-28 14:58:48.814  12092-12092/adonis.quiz D/AndroidRuntime﹕ Shutting down VM
  03-28 14:58:48.814  12092-12092/adonis.quiz W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x430f2140)
  03-28 14:58:48.824  12092-12092/adonis.quiz E/AndroidRuntime﹕ FATAL EXCEPTION: main
      Process: adonis.quiz, PID: 12092
      java.lang.NullPointerException
              at adonis.quiz.CustomAdapter.getView(CustomAdapter.java:65)
              at android.widget.AbsListView.obtainView(AbsListView.java:2312)
              at android.widget.ListView.measureHeightOfChildren(ListView.java:1263)
              at android.widget.ListView.onMeasure(ListView.java:1175)
              at android.view.View.measure(View.java:16772)
              at android.widget.RelativeLayout.measureChild(RelativeLayout.java:689)
              at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:473)
              at android.view.View.measure(View.java:16772)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5139)
              at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
              at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
              at android.view.View.measure(View.java:16772)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5139)
              at android.support.v7.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:391)
              at android.view.View.measure(View.java:16772)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5139)
              at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
              at android.view.View.measure(View.java:16772)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5139)
              at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
              at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
              at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
              at android.view.View.measure(View.java:16772)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5139)
              at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
              at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2294)
              at android.view.View.measure(View.java:16772)
              at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1936)
              at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1133)
              at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1315)
              at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1020)
              at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5762)
              at android.view.Choreographer$CallbackRecord.run(Choreographer.java:771)
              at android.view.Choreographer.doCallbacks(Choreographer.java:574)
              at android.view.Choreographer.doFrame(Choreographer.java:544)
              at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:757)
              at android.os.Handler.handleCallback(Handler.java:733)
              at android.os.Handler.dispatchMessage(Handler.java:95)
              at android.os.Looper.loop(Looper.java:149)
              at android.app.ActivityThread.main(ActivityThread.java:5257)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:515)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
              at dalvik.system.NativeStart.main(Native Method)
  </code></pre>