title: Adapter and Listactivity
body: <p>i'm trying to develope an app for Android 5.0.1. I'm stuck with an Adapter. I can't get the layout to appear. I'm not very practical with Listview. I looked up for solutions but i wasn't lucky. Thanks for the help.
  Here is my code:</p>
  
  <p>The adapter class:</p>
  
  <pre><code>package esp1415.xyz;
  
  import java.util.List;
  
  import android.content.Context;
  import android.content.res.ColorStateList;
  import android.graphics.Color;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.BaseAdapter;
  import android.widget.CompoundButton;
  import android.widget.TextView;
  import android.widget.ToggleButton;
  
  public class ListaFarmaciAdapter extends BaseAdapter {
  
      private Context contesto;
      private List&lt;DettagliFarmaco&gt; lfarm;
  
      public ListaFarmaciAdapter(Context context, List&lt;DettagliFarmaco&gt; list) {
          contesto = context;
          lfarm = list;
      }
  
      public void setFarmaci(List&lt;DettagliFarmaco&gt; list) {
          lfarm = list;
      }
      @Override
      public int getCount() {
          if (lfarm != null) {
              return lfarm.size();
          }
          return 0;
      }
  
      @Override
      public Object getItem(int position) {
          if (lfarm != null) {
              return lfarm.get(position);
          }
          return null;
      }
  
      @Override
      public long getItemId(int position) {
          if (lfarm != null) {
              return lfarm.get(position).id;
          }
          return 0;
      }
  
      @Override
      public View getView(int position, View view, ViewGroup parent) {
  
          if (view == null) {
              LayoutInflater inflater = (LayoutInflater) contesto.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
              view = inflater.inflate(R.layout.grafico, parent, false);
          }
          DettagliFarmaco mod = (DettagliFarmaco) getItem(position);
  
          TextView txtNome = (TextView) view.findViewById(R.id.nome_farmaco);
          txtNome.setText(mod.nome);
  
          TextView txtDesc = (TextView) view.findViewById(R.id.desc_farmaco);
          txtDesc.setText(mod.descrizione);
  
          TextView txtQnt = (TextView) view.findViewById(R.id.qnt_farmaco);
          txtQnt.setText(mod.quantità);
  
          TextView txtInd = (TextView) view.findViewById(R.id.ind_farmaco);
          txtInd.setText(mod.indice_associato);
  
          TextView txtSveglia = (TextView) view.findViewById(R.id.sveglia);
          txtSveglia.setText(String.format("%02d : %02d", mod.ore, mod.minuti));
  
          modificaColoreTesto((TextView) view.findViewById(R.id.l), mod.getRipGiorno(DettagliFarmaco.LUNEDÌ));
          modificaColoreTesto((TextView) view.findViewById(R.id.ma), mod.getRipGiorno(DettagliFarmaco.MARTEDÌ));
          modificaColoreTesto((TextView) view.findViewById(R.id.me), mod.getRipGiorno(DettagliFarmaco.MERCOLEDÌ));
          modificaColoreTesto((TextView) view.findViewById(R.id.g), mod.getRipGiorno(DettagliFarmaco.GIOVEDÌ));
          modificaColoreTesto((TextView) view.findViewById(R.id.v), mod.getRipGiorno(DettagliFarmaco.VENERDÌ));
          modificaColoreTesto((TextView) view.findViewById(R.id.s), mod.getRipGiorno(DettagliFarmaco.SABATO));        
          modificaColoreTesto((TextView) view.findViewById(R.id.d), mod.getRipGiorno(DettagliFarmaco.DOMENICA));
  
          ToggleButton tog = (ToggleButton) view.findViewById(R.id.tog);
          tog.setChecked(mod.attiva);
          tog.setTag(Long.valueOf(mod.id));
          tog.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
  
          @Override
          public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
              ((ListaFarmaciActivity) contesto).setSvegliaAttiva(((Long) buttonView.getTag()).longValue(), isChecked);
          }
      });
  
              view.setTag(Long.valueOf(mod.id));
              view.setOnClickListener(new View.OnClickListener() {
  
          @Override
          public void onClick(View view) {
              ((ListaFarmaciActivity) contesto).startSveglia(((Long) view.getTag()).longValue());
          }
      });
  
      view.setOnLongClickListener(new View.OnLongClickListener() {
  
          @Override
          public boolean onLongClick(View view) {
              ((ListaFarmaciActivity) contesto).deleteSveglia(((Long) view.getTag()).longValue());
              return true;
          }
      });
  
      return view;
  }
  
  private void modificaColoreTesto(TextView v, boolean att) {
      if (att) {
          v.setTextColor(Color.CYAN);
      } else {
          v.setTextColor(Color.LTGRAY);
      }
  }
  }
  </code></pre>
  
  <p>The layout: </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;ListView xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@android:id/list"
  android:layout_width="match_parent"
  android:layout_height="match_parent" 
  android:background="@drawable/bg10" /&gt;
  
        &lt;TextView
              android:id="@+id/nome_farmaco"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_alignParentLeft="true"
              android:layout_alignParentTop="true"
              android:text="@string/nome"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceMedium" /&gt;
  
          &lt;TextView
              android:id="@+id/desc_farmaco"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_below="@+id/nome_farmaco"
              android:text="@string/desc"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceMedium" /&gt;
  
          &lt;TextView
              android:id="@+id/qnt_farmaco"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_below="@+id/desc_farmaco"
              android:textColor="#FAEBD7"
              android:text="@string/qnt"
              android:textAppearance="?android:attr/textAppearanceMedium" /&gt;
  
          &lt;TextView
              android:id="@+id/ind_farmaco"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_below="@+id/qnt_farmaco"
              android:textColor="#FAEBD7"
              android:text="@string/ind"
              android:textAppearance="?android:attr/textAppearanceMedium" /&gt;
  
          &lt;TextView
              android:id="@+id/sveglia"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_below="@+id/ind_farmaco"
              android:layout_marginLeft="25dp"
              android:layout_marginRight="8dp"
              android:textColor="#FAEBD7"
              android:text="@string/tem"
              android:textAppearance="?android:attr/textAppearanceLarge" /&gt;
  
          &lt;TextView
              android:id="@+id/l"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_below="@+id/sveglia"
              android:text="@string/l"
              android:layout_marginLeft="10dp"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt;
  
          &lt;TextView
              android:id="@+id/ma"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_toRightOf="@+id/l"
              android:layout_below="@+id/sveglia"
              android:layout_marginLeft="4dp"
              android:text="@string/m"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt; 
  
          &lt;TextView
              android:id="@+id/me"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_toRightOf="@+id/ma"
              android:layout_below="@+id/sveglia"
              android:layout_marginLeft="4dp"
              android:text="@string/m"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt; 
  
          &lt;TextView
              android:id="@+id/g"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_toRightOf="@+id/me"
              android:layout_below="@+id/sveglia"
              android:layout_marginLeft="4dp"
              android:text="@string/g"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt; 
  
          &lt;TextView
              android:id="@+id/v"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_toRightOf="@+id/g"
              android:layout_below="@+id/sveglia"
              android:layout_marginLeft="4dp"
              android:text="@string/v"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt; 
  
          &lt;TextView
              android:id="@+id/s"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_toRightOf="@+id/v"
              android:layout_below="@+id/sveglia"
              android:layout_marginLeft="4dp"
              android:text="@string/s"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt; 
  
          &lt;TextView
              android:id="@+id/d"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_toRightOf="@+id/s"
              android:layout_below="@+id/sveglia"
              android:layout_marginLeft="4dp"
              android:text="@string/d"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt;
  
          &lt;TextView
              android:id="@+id/data_ins"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_below="@+id/l"
              android:text="@string/data"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt;
  
          &lt;TextView
              android:id="@+id/ora_ins"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_below="@+id/data_ins"
              android:text="@string/ora"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt;
  
          &lt;TextView
              android:id="@+id/data"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_toRightOf="@+id/data_ins"
              android:layout_below="@+id/g"
              android:layout_marginLeft="4dp"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt;
  
          &lt;TextView
              android:id="@+id/ora"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_toRightOf="@+id/ora_ins"
              android:layout_below="@+id/data"
              android:layout_marginLeft="4dp"
              android:textColor="#FAEBD7"
              android:textAppearance="?android:attr/textAppearanceSmall" /&gt;
  
          &lt;ToggleButton
              android:id="@+id/tog"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_alignParentRight="true"
              android:layout_alignTop="@+id/sveglia" /&gt;
  
  &lt;/ListView&gt;
  </code></pre>
  
  <p>and the activity if it helps: </p>
  
  <pre><code>package esp1415.xyz;
  
  import android.app.AlertDialog;
  import android.app.ListActivity;
  import android.content.Context;
  import android.content.DialogInterface;
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.Menu;
  import android.view.MenuItem;
  
  public class ListaFarmaciActivity extends ListActivity {
  
      private ListaFarmaciAdapter adap;
      private DBHelper dbHelper = new DBHelper(this);
      private Context contesto;
  
  @Override
      protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      contesto = this;    
      setContentView(R.layout.grafico);
  
      adap = new ListaFarmaciAdapter(this, dbHelper.getFarmaci());
  
      setListAdapter(adap);
      }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
      getMenuInflater().inflate(R.menu.listafarmaci, menu);
      return true;
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
  
      switch (item.getItemId()) {
          case R.id.agg: {
              startSveglia(-1);
              break;
          }
      }
  
      return super.onOptionsItemSelected(item);
  }
  
  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      super.onActivityResult(requestCode, resultCode, data);
  
      if (resultCode == RESULT_OK) {
          adap.setFarmaci(dbHelper.getFarmaci());
          adap.notifyDataSetChanged();
      }
  }
  
  public void setSvegliaAttiva(long id, boolean att) {
      ManagerSveglia.deleteSveglia(this);
  
      DettagliFarmaco mod = dbHelper.getFarmaco(id);
      mod.attiva = att;
      dbHelper.updateFarmaco(mod);
  
      ManagerSveglia.setSveglia(this);
  }
  
  public void startSveglia(long id) {
      Intent intent = new Intent(this, Sveglia.class);
      intent.putExtra("id", id);
      startActivityForResult(intent, 0);
  }
  
  public void deleteSveglia(long id) {
      final long SvegliaId = id;
      AlertDialog.Builder builder = new AlertDialog.Builder(this);
      builder.setMessage("Sei Sicuro?")
      .setTitle("Vuoi eliminare il farmaco selezionato?")
      .setCancelable(true)
      .setNegativeButton("No", null)
      .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int which) {
              ManagerSveglia.deleteSveglia(contesto);
              dbHelper.deleteFarmaco(SvegliaId);
              adap.setFarmaci(dbHelper.getFarmaci());
              adap.notifyDataSetChanged();
              ManagerSveglia.setSveglia(contesto);
          }
      }).show();
  }
  
  }
  </code></pre>
  
  <p>finally my LOGCAT: </p>
  
  <pre><code>01-22 10:40:49.961: E/AndroidRuntime(30751): FATAL EXCEPTION: main
  01-22 10:40:49.961: E/AndroidRuntime(30751): Process: esp1415.xyz, PID: 30751
  01-22 10:40:49.961: E/AndroidRuntime(30751): java.lang.RuntimeException: Unable to start activity ComponentInfo{esp1415.xyz/esp1415.xyz.ListaFarmaciActivity}: java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in AdapterView
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3149)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3248)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.app.ActivityThread.access$1000(ActivityThread.java:197)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1681)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.os.Handler.dispatchMessage(Handler.java:102)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.os.Looper.loop(Looper.java:145)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.app.ActivityThread.main(ActivityThread.java:6872)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at java.lang.reflect.Method.invoke(Native Method)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at java.lang.reflect.Method.invoke(Method.java:372)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
  01-22 10:40:49.961: E/AndroidRuntime(30751): Caused by: java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in AdapterView
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.widget.AdapterView.addView(AdapterView.java:711)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:822)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.view.LayoutInflater.inflate(LayoutInflater.java:366)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:450)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.app.Activity.setContentView(Activity.java:2358)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at esp1415.xyz.ListaFarmaciActivity.onCreate(ListaFarmaciActivity.java:22)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.app.Activity.performCreate(Activity.java:6550)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1120)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3102)
  01-22 10:40:49.961: E/AndroidRuntime(30751):    ... 10 more
  </code></pre>