Create Dynamically Context Menu in Android

Create Project

Create new project in Android Studio with steps as below:

Step 1: Input Project Name and Select Project Location

Step 2: Select SDK for Android App

Step 3: Select Default Activity for App

Step 4: Finish create project

Add Strings

Open res\values\strings.xml file and add new string as below:

<resources>
    <string name="app_name">Learn Android with Real Apps</string>
    <string name="menu1">Menu 1</string>
    <string name="menu2">Menu 2</string>
    <string name="menu3">Menu 3</string>
    <string name="menu3_1">Menu 3.1</string>
    <string name="menu3_2">Menu 3.2</string>
</resources>

Main Activity Layout

Open res\layout\activity_main.xml file and create layout as below:

<?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"
    android:orientation="vertical"
    tools:context=".MainActivity">

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

</LinearLayout>

Main Activity Class

Add code to MainActivity.java in android.demo.learnandroidwithrealapps package as below:

package android.demo.learnandroidwithrealapps;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {

    private static final int MENU1 = 0;
    private static final int MENU2 = 1;
    private static final int MENU3 = 2;

    private static final int MENU_1_ITEM = Menu.FIRST;
    private static final int MENU_2_ITEM = Menu.FIRST + 1;
    private static final int MENU_3_ITEM = Menu.FIRST + 2;
    private static final int MENU_3_1_ITEM = MENU_3_ITEM + 1;
    private static final int MENU_3_2_ITEM = MENU_3_ITEM + 2;

    private ListView listViewProduct;
    private List<String> products;

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

    private void initView() {
        listViewProduct = findViewById(R.id.listViewProduct);
        registerForContextMenu(listViewProduct);
    }

    private void loadData() {
        products = new ArrayList<String>();
        products.add("Name 1");
        products.add("Name 2");
        products.add("Name 3");
        products.add("Name 4");
        products.add("Name 5");
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, products);
        listViewProduct.setAdapter(arrayAdapter);
    }

    @Override
    public void onCreateContextMenu(ContextMenu contextMenu, View view, ContextMenu.ContextMenuInfo contextMenuInfo) {
        contextMenu.add(MENU1, MENU_1_ITEM, 0, getText(R.string.menu1));
        contextMenu.add(MENU2, MENU_2_ITEM, 1, getText(R.string.menu2));
        SubMenu menu3 = contextMenu.addSubMenu(MENU3, MENU_3_ITEM, 2, getText(R.string.menu3));
        menu3.add(MENU3, MENU_3_1_ITEM, 0, getText(R.string.menu3_1));
        menu3.add(MENU3, MENU_3_2_ITEM, 1, getText(R.string.menu3_2));
        super.onCreateContextMenu(contextMenu, view, contextMenuInfo);
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        if (item.getItemId() == MENU_1_ITEM) {
            Toast.makeText(getApplicationContext(), item.getTitle() + " is selected", Toast.LENGTH_SHORT).show();
        } else if (item.getItemId() == MENU_2_ITEM) {
            // Get Product Name is selected from context menu
            AdapterView.AdapterContextMenuInfo adapterContextMenuInfo = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
            int position = adapterContextMenuInfo.position;
            String product = products.get(position);
            Toast.makeText(getApplicationContext(), product, Toast.LENGTH_SHORT).show();
        } else if (item.getItemId() == MENU_3_1_ITEM) {
            Toast.makeText(getApplicationContext(), item.getTitle() + " is selected", Toast.LENGTH_SHORT).show();
        } else if (item.getItemId() == MENU_3_2_ITEM) {
            Toast.makeText(getApplicationContext(), item.getTitle() + " is selected", Toast.LENGTH_SHORT).show();
        }
        return super.onContextItemSelected(item);
    }

}

Structure of Project

Run App

Load Main Activity

Open Context Menu

Open Menu Item Have Children in Context Menu

Selected Menu in Context Menu

Get Item Info is selected from Context Menu