XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="type text:" />
<EditText
android:id="@+id/editText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter text here" />
<Button
android:id="@+id/addButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Please Click Me!" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="List of value:" />
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp" />
</LinearLayout>
JAVA
package com.example.listview;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private EditText editText;
private Button addButton;
private ListView listView;
private ArrayList<String> itemList;
private ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Ánh xạ các view
editText = findViewById(R.id.editText);
addButton = findViewById(R.id.addButton);
listView = findViewById(R.id.listView);
// Khởi tạo danh sách và adapter
itemList = new ArrayList<>();
adapter = new ArrayAdapter<>(this,
android.R.layout.simple_list_item_1, itemList);
listView.setAdapter(adapter);
// Xử lý sự kiện khi nhấn nút thêm
addButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String text = editText.getText().toString().trim();
if (!text.isEmpty()) {
itemList.add(text);
adapter.notifyDataSetChanged();
editText.setText("");
} else {
Toast.makeText(MainActivity.this, "Please enter some text",
Toast.LENGTH_SHORT).show();
}
}
});
// Xử lý sự kiện khi chọn một item trong ListView
listView.setOnItemClickListener(new
AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int
position, long id) {
String selectedItem = itemList.get(position);
Toast.makeText(MainActivity.this, "Selected: " + selectedItem,
Toast.LENGTH_SHORT).show();
}
});
}
}
