Monday, August 10, 2015

How to use ListView item click listener/event in Android

activity_main.xml

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/rl"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    tools:context=".MainActivity"
    android:background="#e8d25b"
    >
    <TextView
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textStyle="italic"
        android:textColor="#5f65ff"
        android:background="#d5daff"
        android:padding="5dp"
        android:text="Choose your most favorite."
        />
    <ListView
        android:id="@+id/lv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/tv"
        />
</RelativeLayout>
MainActivity.java

package com.cfsuman.me.androidcodesnippets;

import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class MainActivity extends Activity {

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

        // Get reference of widgets from XML layout
        ListView lv = (ListView) findViewById(R.id.lv);
        final TextView tv = (TextView) findViewById(R.id.tv);

        // Initializing a new String Array
        String[] fruits = new String[] {
                "Japanese Persimmon",
                "Kakadu lime",
                "Illawarra Plum",
                "Malay Apple ",
                "Mamoncillo",
                "Persian lime"
        };

        // Create a List from String Array elements
        List<String> fruits_list = new ArrayList<String>(Arrays.asList(fruits));

        // Create a ArrayAdapter from List
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>
                (this, android.R.layout.simple_list_item_1, fruits_list);

        // Populate ListView with items from ArrayAdapter
        lv.setAdapter(arrayAdapter);

        // Set an item click listener for ListView
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                // Get the selected item text from ListView
                String selectedItem = (String) parent.getItemAtPosition(position);

                // Display the selected item text on TextView
                tv.setText("Your favorite : " + selectedItem);
            }
        });
    }
}
More android examples