Android开发笔记（六十五）多样的菜单

import java.util.ArrayList;

import com.example.exmmenu.adapter.MenuLeftAdapter;
import com.example.exmmenu.adapter.MenuPopAdapter;
import com.example.exmmenu.adapter.PopMenuItem;
import com.example.exmmenu.util.MetricsUtil;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.ContextMenu;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.Toast;
import android.widget.PopupWindow.OnDismissListener;

public class MainActivity extends Activity implements OnClickListener, OnItemClickListener {

	private static final String TAG = "MainActivity";
	private Button btn_context_long;
	private PopupWindow popupWindow;
	private int[] mIconList = {R.drawable.ic_refresh, R.drawable.ic_search,
			R.drawable.ic_about, R.drawable.ic_quit};
	private String[] mTextList = {"刷新", "搜索", "关于", "退出"};
	private ArrayList<PopMenuItem> mTitleList = new ArrayList<PopMenuItem>();
	private GestureDetector mGesture;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		Button btn_option = (Button) findViewById(R.id.btn_option);
		Button btn_context = (Button) findViewById(R.id.btn_context);
		btn_option.setOnClickListener(this);
		btn_context.setOnClickListener(this);
		btn_context_long = (Button) findViewById(R.id.btn_context_long);
		Button btn_pop = (Button) findViewById(R.id.btn_pop);
		Button btn_pop_left = (Button) findViewById(R.id.btn_pop_left);
		btn_pop.setOnClickListener(this);
		btn_pop_left.setOnClickListener(this);

		mGesture = new GestureDetector(this, mGestureListener);
		for (int i=0; i<mIconList.length; i++) {
			mTitleList.add(new PopMenuItem(mIconList[i], mTextList[i]));
		}
	}
	
	@Override
	protected void onResume() {
		registerForContextMenu(btn_context_long);  
		super.onResume();
	}
	
	@Override
	protected void onPause() {
		unregisterForContextMenu(btn_context_long); 
		super.onPause();
	}
	
	private void closePopWindow() {
        if (popupWindow != null && popupWindow.isShowing()) {
            popupWindow.dismiss();
            popupWindow = null;
        }
	}

	@Override
	public void onClick(View v) {
		if (v.getId() == R.id.btn_option) {
			openOptionsMenu();
		} else if (v.getId() == R.id.btn_context) {
		    registerForContextMenu(v);
		    openContextMenu(v);
		    unregisterForContextMenu(v);
		} else if (v.getId() == R.id.btn_pop) {
			View view = LayoutInflater.from(this).inflate(R.layout.menu_pop, null);
			ListView lv_menu_pop = (ListView) view.findViewById(R.id.lv_menu_pop);
			MenuPopAdapter adapter = new MenuPopAdapter(this, mTitleList);
			lv_menu_pop.setAdapter(adapter);
			lv_menu_pop.setOnItemClickListener(this);
			popupWindow = new PopupWindow(view, MetricsUtil.getPopWidth(this), 
					LayoutParams.WRAP_CONTENT);
			popupWindow.setFocusable(false);
			popupWindow.showAsDropDown(v, 10, 0);
		} else if (v.getId() == R.id.btn_pop_left) {
			View view = LayoutInflater.from(this).inflate(R.layout.menu_pop, null);
			ListView lv_menu_pop = (ListView) view.findViewById(R.id.lv_menu_pop);
			MenuLeftAdapter adapter = new MenuLeftAdapter(this, mTitleList);
			lv_menu_pop.setAdapter(adapter);
			lv_menu_pop.setOnItemClickListener(this);
			popupWindow = new PopupWindow(view, MetricsUtil.getPopWidth(this), 
					LayoutParams.MATCH_PARENT, false);
			popupWindow.setOnDismissListener(new OnDismissListener() {
				public void onDismiss() {
					Toast.makeText(MainActivity.this, "左侧菜单消失了", Toast.LENGTH_SHORT).show();
				}
			});
			//在窗口内部的空白处点击，也要关闭弹窗
			view.setOnTouchListener(new OnTouchListener() {
	            @Override
	            public boolean onTouch(View v, MotionEvent event) {
	            	closePopWindow();
	                return false;
	            }
	        });
			popupWindow.setAnimationStyle(R.style.AnimationFade);
			popupWindow.showAtLocation(v, Gravity.LEFT, 0, 0);
		}
	}

	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    	closePopWindow();
		PopMenuItem item = mTitleList.get(position);
		Toast.makeText(this, "您点击的菜单名称是"+item.text, Toast.LENGTH_LONG).show();
	}

	@Override
	public boolean onMenuOpened(int featureId, Menu menu) {
		Log.d(TAG, "onMenuOpened");
		return super.onMenuOpened(featureId, menu);
	}
	
	@Override
	public boolean onMenuItemSelected(int featureId, MenuItem item) {
		Log.d(TAG, "onMenuItemSelected");
		return super.onMenuItemSelected(featureId, item);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		Log.d(TAG, "onCreateOptionsMenu");
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		Log.d(TAG, "onOptionsItemSelected");
		return super.onOptionsItemSelected(item);
	}
	
	@Override
	public boolean onPrepareOptionsMenu(Menu menu) {
		Log.d(TAG, "onPrepareOptionsMenu");
		return super.onPrepareOptionsMenu(menu);
	}
	
	@Override
	public void onOptionsMenuClosed(Menu menu) {
		Log.d(TAG, "onOptionsMenuClosed");
		super.onOptionsMenuClosed(menu);
	}

	@Override
	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
		Log.d(TAG, "onCreateContextMenu");
		getMenuInflater().inflate(R.menu.main, menu);
	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		Log.d(TAG, "onContextItemSelected");
		return super.onContextItemSelected(item);
	}
	
	@Override
	public void onContextMenuClosed(Menu menu) {
		Log.d(TAG, "onContextMenuClosed");
		super.onContextMenuClosed(menu);
	}
	
	//在弹窗以外的区域点击，都关闭弹窗
	@Override
	public boolean dispatchTouchEvent(MotionEvent ev) {
		mGesture.onTouchEvent(ev);
		return super.dispatchTouchEvent(ev);
	}

	private OnGestureListener mGestureListener = new OnGestureListener() {

		@Override
		public boolean onDown(MotionEvent e) {
			return false;
		}

		@Override
		public void onShowPress(MotionEvent e) {
		}

		@Override
		public boolean onSingleTapUp(MotionEvent e) {
        	closePopWindow();
			return false;
		}

		@Override
		public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
			return false;
		}

		@Override
		public void onLongPress(MotionEvent e) {
		}

		@Override
		public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
			return false;
		}
		
	};
	
}