Android自定义menu的实现

 

public class MainAcvtivity extends Activity {
   private int[] nameArr = new int[]{R.string.menu1,R.string.menu2,R.string.menu3,R.string.menu4};
   private int[] imageArr = new int[]{R.drawable.menu1,R.drawable.menu2,R.drawable.menu3,R.drawable.menu4};
   private  MyMenu myMenu;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        initMenu();
    }
    private void initMenu(){
          myMenu = new MyMenu(this, nameArr, imageArr, 4) {
 			
 			@Override
 			public void OnItemClick(int viewId) {
 				switch (viewId) {
				case R.string.menu1:
					Toast.makeText(MainAcvtivity.this,getString(R.string.menu1), Toast.LENGTH_SHORT).show();
					break;
				case R.string.menu2:
					Toast.makeText(MainAcvtivity.this,getString(R.string.menu2), Toast.LENGTH_SHORT).show();
					break;
				case R.string.menu3:
					Toast.makeText(MainAcvtivity.this,getString(R.string.menu3), Toast.LENGTH_SHORT).show();
					break;
				case R.string.menu4:
					Toast.makeText(MainAcvtivity.this,getString(R.string.menu4), Toast.LENGTH_SHORT).show();
					break;
				}
 				myMenu.menuDismiss();
 			}
 		};
    }

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add("menu");
		return super.onCreateOptionsMenu(menu);
	}
	@Override
	public boolean onMenuOpened(int featureId, Menu menu) {
		myMenu.showMenu(findViewById(R.id.main));
		return false;
	}

public abstract class MyMenu{
	private MainAcvtivity AbsActivity;
	private int[] nameArr;
	private int[] imageArr;
	private int count;
	private PopupWindow mPopupWindow;
	private ViewFlipper mViewFlipper;
	private List<Map<String, Object>> data = new ArrayList<Map<String,Object>>();
	public MyMenu(MainAcvtivity activity,int[] nameArr,int[] imageArr,int count){
		this.AbsActivity = activity;
    	this.nameArr = nameArr;
    	this.imageArr = imageArr;
    	this.count = count;
    	 initMenu();
	}
    public void initMenu(){
    	mViewFlipper = new ViewFlipper(AbsActivity);
    	LinearLayout mLinearLayout = (LinearLayout) AbsActivity.getLayoutInflater().inflate(R.layout.menu_view, null);
    	mViewFlipper.addView(mLinearLayout);
    	mViewFlipper.setFlipInterval(1000000);
    	GridView mGridView = (GridView) mLinearLayout.findViewById(R.id.menu_gridview);
    	mGridView.setNumColumns(count);
    	mPopupWindow = new PopupWindow(mViewFlipper, LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
    	mPopupWindow.setBackgroundDrawable(new BitmapDrawable());
    	mPopupWindow.setFocusable(true);
    	mPopupWindow.update();
    	for (int i = 0; i < nameArr.length; i++) {
			Map<String, Object> map = new HashMap<String, Object>();
			map.put("itemIamge", imageArr[i]);
			map.put("itemText", AbsActivity.getString(nameArr[i]));
			map.put("key", nameArr[i]);
			data.add(map);
		}
    	BaseAdapter adapter = new SimpleAdapter(AbsActivity, data, R.layout.menu_item, new String[]{"itemIamge","itemText"}, 
    			new int[]{R.id.menu_item_image,R.id.menu_item_text});
    	mGridView.setAdapter(adapter);
    	mGridView.setOnKeyListener(new OnKeyListener() {
			
			@Override
			public boolean onKey(View v, int keyCode, KeyEvent event) {
				if(keyCode == KeyEvent.KEYCODE_MENU){
					if(mPopupWindow != null){
						mPopupWindow.dismiss();
					}
				}
				return false;
			}
		});
    	mGridView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				int key = Integer.parseInt( data.get(position).get("key").toString());
				OnItemClick(key);
			}
		});
    }
    public void showMenu(View view){
    	if(mPopupWindow != null){
    		if(mPopupWindow.isShowing()){
    			mPopupWindow.dismiss();
    		}else{
    			mPopupWindow.getContentView().setEnabled(true);
    			mPopupWindow.showAtLocation(view, Gravity.BOTTOM, 0, 0);
    			mViewFlipper.startFlipping();
    		}
    	}
    }
    public void menuDismiss(){
    	if(mPopupWindow !=null && mPopupWindow.isShowing()){
    		mPopupWindow.dismiss();
    	}
    }
	public abstract void OnItemClick(int viewId);
}