XMLMenusActivity.java

package com.google.mcommerce.sample.android.chapter04.menu;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.PopupMenu;
import android.widget.TextView;

import com.google.mcommerce.sample.android.R;

public class XMLMenusActivity extends Activity {

	// Initialize this in onCreateOptions
	Menu myMenu = null;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		// TextView tv = new TextView(this);
		// tv.setText("Hello, Android. Say hello");
		// setContentView(tv);

		setContentView(R.layout.c04_menu_main);

		// Before calling this method make sure
		// set the content view
		registerForContextMenu(this.getTextView());
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		this.loadXMLMenu(menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		this.appendMenuItemText(item);
		if (item.getItemId() == R.id.xml_menu_popup) {
			this.showPopupMenu();
		} else if (item.getItemId() == R.id.menu_clear) {
			this.emptyText();
		}
		return true;
	}

	private void loadXMLMenu(Menu menu) {
		MenuInflater inflater = getMenuInflater(); // from activity
		inflater.inflate(R.menu.c04_my_menu, menu);
	}

	private TextView getTextView() {
		TextView tv = (TextView) this.findViewById(R.id.textViewId);
		return tv;
	}

	public void appendText(String text) {
		TextView tv = (TextView) this.findViewById(R.id.textViewId);
		tv.setText(tv.getText() + text);
	}

	private void appendMenuItemText(MenuItem menuItem) {
		String title = menuItem.getTitle().toString();
		TextView tv = (TextView) this.findViewById(R.id.textViewId);
		tv.setText(tv.getText() + "\n" + title + ":" + menuItem.getItemId());
	}

	private void emptyText() {
		TextView tv = (TextView) this.findViewById(R.id.textViewId);
		tv.setText("");
	}

	private void showPopupMenu() {
		TextView tv = this.getTextView();
		PopupMenu popup = new PopupMenu(this, tv);
		// popup.getMenuInflater().inflate(
		// R.menu.popup_menu, popup.getMenu());
		// Or in api 14
		popup.inflate(R.menu.c04_popup_menu);
		popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
			public boolean onMenuItemClick(MenuItem item) {
				appendMenuItemText(item);
				return true;
			}
		});
		popup.show();
	}
}// eof-class