菜单（五）ActionMode和PopupMenu

package com.example.actionmode;

import android.app.Activity;
import android.os.Bundle;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.widget.Button;
import android.widget.PopupMenu;
import android.widget.PopupMenu.OnMenuItemClickListener;
import android.widget.Toast;

public class MainActivity extends Activity {

	private Button button1;
	private Button button2;
	private ActionMode actionMode;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button1 = (Button) findViewById(R.id.button1);
		button2 = (Button) findViewById(R.id.button2);
		button1.setOnLongClickListener(new OnLongClickListener() {

			@Override
			public boolean onLongClick(View v) {
				// TODO Auto-generated method stub
				if (actionMode != null) {
					return false;
				}
				actionMode = startActionMode(actionCallback);
				v.setSelected(true);
				return true;
			}
		});
		button2.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				PopupMenu popupMenu = new PopupMenu(MainActivity.this, v);
				popupMenu
						.setOnMenuItemClickListener(new OnMenuItemClickListener() {

							@Override
							public boolean onMenuItemClick(MenuItem item) {
								// TODO Auto-generated method stub
								switch (item.getItemId()) {
								case R.id.edit:
									edit();
									break;
								case R.id.share:
									share();
									break;
								case R.id.delete:
									delete();
									break;
								default:
									break;
								}
								return false;
							}
						});
				MenuInflater menuInflater = getMenuInflater();
				menuInflater.inflate(R.menu.main, popupMenu.getMenu());
				popupMenu.show();
				// 如果有空间，显示在view的上面，没空间显示在view的下面
			}
		});
	}

	private ActionMode.Callback actionCallback = new ActionMode.Callback() {

		@Override
		public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
			// TODO Auto-generated method stub
			return false;
		}

		@Override
		public void onDestroyActionMode(ActionMode mode) {
			// TODO Auto-generated method stub
			actionMode = null;
		}

		// 从xml加载菜单
		@Override
		public boolean onCreateActionMode(ActionMode mode, Menu menu) {
			// TODO Auto-generated method stub
			MenuInflater menuInflater = getMenuInflater();
			menuInflater.inflate(R.menu.main, menu);
			return true; // 注意这里要返回true
		}

		@Override
		public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
			// TODO Auto-generated method stub
			switch (item.getItemId()) {
			case R.id.edit:
				edit();
				break;
			case R.id.share:
				share();
				break;
			case R.id.delete:
				delete();
				break;
			default:
				break;
			}
			return false;
		}
	};

	public void edit() {
		Toast.makeText(MainActivity.this, "编辑", Toast.LENGTH_SHORT).show();
	}

	public void share() {
		Toast.makeText(MainActivity.this, "分享", Toast.LENGTH_SHORT).show();
	}

	public void delete() {
		Toast.makeText(MainActivity.this, "删除", Toast.LENGTH_SHORT).show();
	}
}

res/menu/main.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/edit"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="编辑"/>
    <item
        android:id="@+id/share"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="分享"/>
    <item
        android:id="@+id/delete"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="删除"/>

</menu>

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