Android development : Listview with android:onclick attribute on item

Question

I'm beginner in android development and i a have question about Listview and android:onclick attribute. I try to use attribute android:onclick ="myMethod" on each element of my listview instead of define OnItemClickListener/onItemClick (too much verbose for me)

MyMethod is executed but how can i get clicked element (current context) ?

Thanks in advance

Answer 1

If i am right your question is about implementing on click listener on each listrow item instead of list row.

If that is correct this is how you should implement:

1.In your adapter of getView() method you might be inflating a layout for list row like below:

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

            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.list_row_layout, parent, false);


        return convertView;
    }

In the above code list_row_layout is the xml file i'm inflating.

Go to that layout and add the following line android:descendantFocusability="blocksDescendants" to the root level of the xml layout like below:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_margin="4dp"
    android:descendantFocusability="blocksDescendants"<!--This is the line i'm talking about-->
    android:background="@drawable/rounded_border_layout"
    android:layout_height="wrap_content">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="40dp"
        android:layout_marginRight="10dp"
        android:id="@+id/review_main_user_image_layout"
        android:layout_marginLeft="10dp"
        android:layout_height="54dp">
        <ImageView
            android:layout_width="40dp"
            android:id="@+id/review_main_user_image"
            android:background="@drawable/reviews_x_trail_user_image_border"
            android:layout_height="40dp"
            android:src="@drawable/ic_help_user" />
        <TextView
            android:typeface="monospace"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Me"
            android:textSize="10sp"
            android:layout_gravity="center"
            android:singleLine="true"
            android:id="@+id/review_main_user_name"
            android:layout_below="@+id/review_main_user_image" />
    </LinearLayout>

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/review_main_user_image_layout"
        android:layout_toEndOf="@+id/review_main_user_image_layout">

        <TextView
            android:layout_marginLeft="8dp"
            android:layout_width="wrap_content"
            android:textColor="@color/black"
            android:layout_height="wrap_content"
            android:singleLine="true"
            android:id="@+id/review_main_title"
            android:text="Good Product For The Price"/>
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="8dp"
            android:orientation="horizontal">
            <RatingBar
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/review_main_rating"
                android:progressDrawable="@drawable/apptheme_ratingbar_small_holo_light"
                android:numStars="5"
                style="?android:attr/ratingBarStyleSmall" />
            <TextView
                android:layout_marginLeft="8dp"
                android:text="12-Jun-1993"
                android:id="@+id/review_main_date"
                android:layout_width="wrap_content"
                android:layout_height="match_parent" />
        </LinearLayout>


    </LinearLayout>
</RelativeLayout>

That't it now in your adapter getView method you can implement on click listener for each widget you have in that layout.

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

        ReviewsXTrailViewHolder reviewsXTrailViewHolder;
        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.list_row_review_main, parent, false);
            TextView title = (TextView)convertView.findViewById(R.id.review_main_user_image);

            //title.setOnclickListener()

        return convertView;
    }

In that above code i have added on click listener for textview.I hope it will work

Comment below if that doesn't work

Answer 2

As a beginner, setting an OnItemClickListener might seem a bit scary, but it's really not a big deal at all (and a core concept you should be learning anyway!).

So if you have a simple layout with a ListView in it like this...

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/containerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ListView
        android:id="@+id/myListview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</RelativeLayout>

You can set up an OnItemClickListener with just this code:

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.your_listview_layout);

        listView = (ListView)findViewById(R.id.myListview);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                //Every time an item is clicked, you can handle it right here.
            }
        });
    }

So every time an item in your list is clicked, the onItemClick method is fired, and you can figure out which item was clicked by using the int position argument that comes in.