Androidにおけるメニューボタン押下時のメニューの表示サンプル

android_menu_option_sample.java

	@Override
	public boolean onPrepareOptionsMenu(Menu menu) {

		menu.getItem(0).setEnabled(true);
		menu.getItem(1).setEnabled(true);
		menu.getItem(2).setEnabled(true);
		menu.getItem(3).setEnabled(true);
		
		return super.onPrepareOptionsMenu(menu);
	}


	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		
		menu.add(0, 0, 0, R.string.add_channel);
		menu.add(0, 1, 1, R.string.channel_list);
		menu.add(0, 2, 2, R.string.reloading);
		menu.add(0, 3, 3, R.string.contact_author);
		menu.getItem(0).setIcon(R.drawable.add_channel);
		menu.getItem(1).setIcon(R.drawable.setting);
		menu.getItem(2).setIcon(R.drawable.refresh);
		menu.getItem(3).setIcon(R.drawable.about);
		
		return super.onCreateOptionsMenu(menu);
	}


	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		
		switch(item.getItemId()) {
		case 0:
			// do something
			break;
			
		case 1:
			Intent intent = new Intent();
			intent.setClass(SampleActivity.this, Setting.class);
			startActivity(intent);
			break;
			
		case 2:
			// do something
			break;
			
		case 3:
			new AlertDialog.Builder(SampleActivity.this)
				.setMessage(getString(R.string.app_name) + " " + softVersion + "\n" + getString(R.string.author) + "")
				.setIcon(R.drawable.ic_launcher)
				.setTitle(getString(R.string.about))
				.setPositiveButton(getString(R.string.report_problem), new DialogInterface.OnClickListener() {
					
					@Override
					public void onClick(DialogInterface dialog, int which) {
						Intent sendIntent = new Intent(Intent.ACTION_SEND);
						sendIntent.putExtra(Intent.EXTRA_EMAIL, new String[]{"sample@example.com"});
						sendIntent.putExtra(Intent.EXTRA_TEXT, "write your suggestion here");
						sendIntent.putExtra(Intent.EXTRA_SUBJECT, "NewsReader issue report");
						sendIntent.setType("message/rfc822");
						startActivity(Intent.createChooser(sendIntent, "Title:"));
					}
				})
				.setNeutralButton(getString(R.string.back), new DialogInterface.OnClickListener() {
					
					@Override
					public void onClick(DialogInterface dialog, int which) {
						
					}
				})
				.show();
			break;
		}
		return super.onOptionsItemSelected(item);
	}