模仿QQ效果的菜单显示

这是我学android的时候模仿QQ效果的菜单自己做的一个菜单，我这里只是把效果实现了一下，代码的优化还没有做，觉得写得很烂的话，还请见谅！！

这是MainActivity.java类

package com.tenghu.menu;

import java.util.Timer;
import java.util.TimerTask;

import com.tenghu.menu.adapter.MyBaseAdapter;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.graphics.drawable.ColorDrawable;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.PopupWindow;
import android.widget.Toast;

public class MainActivity extends Activity {
private View view;
private GridView gridView;
private PopupWindow popupWindow;
private int[] images = { R.drawable.one, R.drawable.two, R.drawable.three };
private String[] items = { "退出", "换肤", "更多" };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initPopupWindow();
view = LayoutInflater.from(this).inflate(R.layout.activity_main, null);

}

/**
* 初始化参数
*/
private void initPopupWindow() {
// 获取View
View view = LayoutInflater.from(this).inflate(R.layout.grid, null);
// 获取GridView
gridView = (GridView) view.findViewById(R.id.gridView);
// 转载参数
gridView.setAdapter(new MyBaseAdapter(this, images, items));
gridView.setOnItemClickListener(new ItemClickListener());
// 创建PopupWindow对象
popupWindow = new PopupWindow(view,
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
// 设置系统默认动画
popupWindow.setAnimationStyle(android.R.style.Animation_Dialog);
popupWindow.update();
// 触摸到空间
popupWindow.setTouchable(true);
// 触摸菜单外面时消失,必须在Touchable下
popupWindow.setOutsideTouchable(true);
// 防止弹出菜单后遮住虚拟键盘
popupWindow
.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
// 设置背景，必须要的，如果不设置，并且有设置了获取焦点，那么点击其他的地方则没反应
popupWindow.setBackgroundDrawable(new ColorDrawable(0));
// 获取焦点
popupWindow.setFocusable(true);
}

/**
* 创建系统菜单
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add("menu");
return super.onCreateOptionsMenu(menu);
}

/**
* 打开菜单
*/
@Override
public boolean onMenuOpened(int featureId, Menu menu) {
if (null != popupWindow) {
// 如果菜单为显示状态
if (popupWindow.isShowing()) {
// 则影藏起来
popupWindow.dismiss();
} else {
// 否则则显示
popupWindow.showAtLocation(view, Gravity.BOTTOM, 0, 0);
}
}
// 如果返回ture，则显示系统菜单
return false;
}

/**
* 菜单点击事件
*
* @author xiaolaohu
*
*/
class ItemClickListener implements OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view,
final int position, long id) {
Toast.makeText(MainActivity.this, items[position],
Toast.LENGTH_SHORT).show();
}
}

/**
* 按键监听
*/
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
//如果点击的是返回键
if (keyCode == KeyEvent.KEYCODE_BACK) {
// 如果菜单为显示状态
if (popupWindow.isShowing()) {
// 就隐藏菜单
popupWindow.dismiss();
} else {
// 否则就提示用户是否退出
new AlertDialog.Builder(this)
.setTitle("退出")
.setMessage("确定要退出吗？")
.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
}
})
.setPositiveButton("确定",
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog,
int which) {
finish();
}
}).show();
}
}
return super.onKeyDown(keyCode, event);
}

}

这是继承与BaseAdapter类，我这里取名为MyBaseAdapter.java

package com.tenghu.menu.adapter;

import com.tenghu.menu.R;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class MyBaseAdapter extends BaseAdapter{
private Context context;
private int[] images;
private String[] items;
public MyBaseAdapter(Context context,int[] images,String[] items){
this.context=context;
this.images=images;
this.items=items;
}

@Override
public int getCount() {
return items.length;
}

@Override
public Object getItem(int position) {
return items[position];
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
//获取LayoutInfater
LayoutInflater li=LayoutInflater.from(context);
//获取VIew
convertView=li.inflate(R.layout.items, null);
//获取TextView对象
TextView text=(TextView) convertView.findViewById(R.id.tv_text);
//获取ImageView对象
ImageView image=(ImageView) convertView.findViewById(R.id.iv_icon);
//设置参数
text.setText(items[position]);
image.setBackgroundResource(images[position]);
return convertView;
}

}