리스트뷰 동적 추가

main.activity

public class MainActivity6_list extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_activity6_list);

        EditText edtItem = findViewById(R.id.edtItem);
        Button btnAdd = findViewById(R.id.btnAdd);
        ListView listView = findViewById(R.id.listView1);

        ArrayList<String>arr = new ArrayList<>();
        ArrayAdapter<String>arrayAdapter = new ArrayAdapter<>(
            this, android.R.layout.simple_list_item_1,arr);
        listView.setAdapter(arrayAdapter);

        btnAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                    arr.add(edtItem.getText().toString());
                    arrayAdapter.notifyDataSetChanged();
                    edtItem.setText("");
            }
        });

    }
}

 

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:context=".MainActivity6_list"
    android:orientation="vertical">

    <EditText
        android:id="@+id/edtItem"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
    <Button
        android:id="@+id/btnAdd"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="항목추가"/>
    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>


</LinearLayout>

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결과 값