Ytukyg

I'm new to Android, with just a few hours of experience. I have created an interface with 2 main columns. Both columns have custom objects that must act as buttons. These custom objects are based on a simple custom class (ButtonItem) that has 2 textviews. Also I have a layout that contains a LinearLayout (vertical) with the two TextViews inside. In the main view, I fill both columns with and adapter and example content using the custom class and placeholder texts, and the result is that the columns have "buttons" with 2 independent text lines. The problem is to add an OnClickListeners to these objects. My idea was to add some attribute for each ButtonItem to assign an action when clicked, but until now I've had no success. Any ideas? Thanks.

This is how the columns are filled (updated)

public class TicketSaleActivity extends Activity {



    private ListView lv;

    private LinearLayout ll;



    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.ticket_sale_layout);



        lv = (ListView) findViewById(R.id.buttonList);

        ll = (LinearLayout)findViewById(R.id.linearLayout);



        ArrayList<ButtonItem> buttonItemList = new ArrayList<>();



        ButtonItem buttonItem1 = new ButtonItem();

        buttonItem1.setUpperText("1€");

        buttonItem1.setBottomText("Billete a Narnia");

        ButtonItem buttonItem2 = new ButtonItem();

        buttonItem2.setUpperText("1.5€");

        buttonItem2.setBottomText("BILLETE A CANGAS DE ONIS");

        ButtonItem buttonItem3 = new ButtonItem();

        buttonItem3.setUpperText("1.25€");

        buttonItem3.setBottomText("Billete a Narnia");

        ButtonItem buttonItem4 = new ButtonItem();

        buttonItem4.setUpperText("2€");

        buttonItem4.setBottomText("BILLETE A CALASPARRA");



        buttonItemList.add(buttonItem1);

        buttonItemList.add(buttonItem2);

        buttonItemList.add(buttonItem3);

        buttonItemList.add(buttonItem4);

        buttonItemList.add(buttonItem1);



        ButtonItemAdapter buttonItemAdapter = new ButtonItemAdapter(this, buttonItemList);

        lv.setAdapter(buttonItemAdapter);

    lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override

        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            Log.i(TicketSaleActivity.class.getSimpleName(),"Clicked");

        }

    });





    for (int i=0;i<buttonItemList.size();i++)

    {

        View item = buttonItemAdapter.getView(i, null, null);

        ll.addView(item);



    }

    }

}

Custom class:

public class ButtonItem{



    private String upperText;

    private String bottomText;





    public String getUpperText() {

        return upperText;

    }



    public void setUpperText(String upperText) {

        this.upperText = upperText;

    }



    public String getBottomText() {

        return bottomText;

    }



    public void setBottomText(String bottomText) {

        this.bottomText = bottomText;

    }



}

Adapter

public class ButtonItemAdapter extends BaseAdapter {



    ArrayList<ButtonItem> buttonItemList;

    Context context;



    public ButtonItemAdapter(Context context, ArrayList<ButtonItem> buttonList)

    {

        this.context=context;

        this.buttonItemList=buttonList;

    }



    @Override

    public int getCount() {

        return buttonItemList.size();

    }



    @Override

    public Object getItem(int position) {

        return buttonItemList.get(position);

    }



    @Override

    public long getItemId(int position) {

        return 0;

    }



    @Override

    public View getView(int position, View convertView, ViewGroup parent) {



        ViewHolder viewHolder;

        if(convertView==null)

        {

            convertView = LayoutInflater.from(context).inflate(R.layout.button_list_item,parent, false);



            viewHolder = new ViewHolder();

            viewHolder.upperText = convertView.findViewById(R.id.buttonList_upperText);

            viewHolder.bottomText = convertView.findViewById(R.id.buttonList_bottomText);



            convertView.setTag(viewHolder);//almacenamos los elementos en la vista para reutilizarlos

        }

        else{

            viewHolder = (ViewHolder) convertView.getTag();

        }



        viewHolder.upperText.setText(buttonItemList.get(position).getUpperText());

        viewHolder.bottomText.setText(buttonItemList.get(position).getBottomText());

        return convertView;

    }



    static class ViewHolder{

        TextView upperText;

        TextView bottomText;

    }

}

button_list_item.xml

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

<android.support.constraint.ConstraintLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent">



    <LinearLayout

        style="@style/list_button"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_marginEnd="1dp"

        android:orientation="vertical"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent">



        <TextView

            android:id="@+id/buttonList_upperText"

            android:layout_width="match_parent"

            android:layout_height="0dp"

            android:layout_marginStart="8dp"

            android:layout_marginTop="8dp"

            android:layout_marginEnd="8dp"

            android:layout_weight="1"

            android:text="12€"

            android:textSize="16sp"

            android:textStyle="bold"

            app:layout_constraintEnd_toEndOf="parent"

            app:layout_constraintStart_toStartOf="parent"

            app:layout_constraintTop_toTopOf="parent" />



        <TextView

            android:id="@+id/buttonList_bottomText"

            android:layout_width="match_parent"

            android:layout_height="0dp"

            android:layout_marginStart="8dp"

            android:layout_marginTop="20dp"

            android:layout_marginEnd="8dp"

            android:layout_weight="2.5"

            android:maxLines="2"

            android:minLines="2"

            android:textSize="18sp"

            app:layout_constraintEnd_toEndOf="parent"

            app:layout_constraintHorizontal_bias="0.0"

            app:layout_constraintStart_toStartOf="parent"

            app:layout_constraintTop_toBottomOf="@+id/buttonList_upperText" />

    </LinearLayout>



</android.support.constraint.ConstraintLayout>

styles/list_button

<style name="list_button" parent="@android:style/Widget.Button">

        <item name="android:gravity">center_vertical|center_horizontal</item>

        <item name="android:textColor">#000000</item>

        <item name="android:shadowColor">#000000</item>

        <item name="android:shadowDx">0</item>

        <item name="android:shadowDy">0</item>

        <item name="android:layout_margin">0.5dp</item>

        <item name="android:shadowRadius">0.1</item>

        <item name="android:textSize">20dip</item>

        <item name="android:textStyle">normal</item>

        <item name="android:background">@drawable/default_button</item>        

        <item name="android:padding">2dp</item>

    </style>

Update: added ticket_sale_layout

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

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:background="@android:color/darker_gray">



    <LinearLayout

        android:id="@+id/linearLayout3"

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:baselineAligned="false"

        android:orientation="horizontal"

        app:layout_constraintBottom_toTopOf="@+id/linearLayout2"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent">



        <LinearLayout

            android:id="@+id/linearLayout"

            android:layout_width="0dp"

            android:layout_height="match_parent"

            android:layout_marginStart="8dp"

            android:layout_marginTop="8dp"

            android:layout_marginBottom="8dp"

            android:layout_weight="1"

            android:background="@android:color/darker_gray"

            android:orientation="vertical"

            android:padding="0dp"

            app:layout_constraintBottom_toTopOf="@+id/linearLayout2"

            app:layout_constraintStart_toStartOf="parent"

            app:layout_constraintTop_toTopOf="parent"

            app:layout_constraintVertical_bias="0.0">



        </LinearLayout>



        <ListView

            android:id="@id/buttonList"

            android:layout_width="0dp"

            android:layout_height="match_parent"

            android:layout_marginTop="8dp"

            android:layout_marginEnd="8dp"

            android:layout_marginBottom="8dp"

            android:layout_weight="1"

            android:background="#FFF"

            android:divider="@null"

            android:dividerHeight="0dp"

            app:layout_constraintBottom_toTopOf="@+id/linearLayout2"

            app:layout_constraintEnd_toEndOf="parent"

            app:layout_constraintTop_toTopOf="parent" />

    </LinearLayout>



    <LinearLayout

        android:id="@+id/linearLayout2"

        android:layout_width="0dp"

        android:layout_height="50dp"

        android:layout_marginStart="8dp"

        android:layout_marginTop="16dp"

        android:layout_marginEnd="8dp"

        android:layout_marginBottom="8dp"

        android:orientation="horizontal"

        app:layout_constraintBottom_toTopOf="@+id/sellButton"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toBottomOf="@+id/linearLayout3"

        tools:background="@android:color/darker_gray">



        <TextView

            android:id="@+id/textView3"

            android:layout_width="150dp"

            android:layout_height="match_parent"

            android:layout_weight="1"

            android:background="#FFF"

            android:focusableInTouchMode="false"

            android:maxLines="2"

            android:text="TextView" />



        <TextView

            android:id="@+id/textView2"

            android:layout_width="150dp"

            android:layout_height="match_parent"

            android:layout_weight="1"

            android:background="#FFF"

            android:focusableInTouchMode="false"

            android:text="TextView" />

    </LinearLayout>



    <Button

        android:id="@+id/sellButton"

        style="@style/sell_button"

        android:layout_width="0dp"

        android:layout_height="75dp"

        android:layout_marginStart="4dp"

        android:layout_marginEnd="4dp"

        android:text="@string/btn_sell"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent" />



</android.support.constraint.ConstraintLayout>

You could either bind click listener within your adapter's getView method, or use OnItemClickListener on your AdapterView:

lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {

    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        // ...

    }

});

In order to receive callback in onItemClick, you should not have any clickable or focusable views in the item views. So try removing @style/list_button from the item XML layout, or replace it with other styles.