Android UI设计与开发之PopupWindow仿腾讯新闻底部弹出菜单

package com.yanis.demo;

import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout.LayoutParams;
import android.widget.PopupWindow;

public class PopupWindowActivity extends Activity {
 PopupWindow pop;
 Button btn;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_popup_window);
  btn = (Button) findViewById(R.id.btnShowWindow);

  LayoutInflater inflater = LayoutInflater.from(this);
  // 引入窗口配置文件 - 即弹窗的界面
  View view = inflater.inflate(R.layout.my_popup_window, null);
  // PopupWindow实例化
  pop = new PopupWindow(view, LayoutParams.WRAP_CONTENT,
    LayoutParams.WRAP_CONTENT, false);

  btn.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    if (pop.isShowing()) {
     // 隐藏窗口，如果设置了点击窗口外消失，则不需要此方式隐藏
     pop.dismiss();
    } else {
     // 弹出窗口显示内容视图,默认以锚定视图的左下角为起点，这里为点击按钮
     pop.showAsDropDown(v);
    }
   }
  });

 }
}

package com.yanis.popup_window;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout.LayoutParams;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener,
  OnKeyListener {
 PopupWindow pop;
 TextView hideView;
 Button btnCancel;
 ImageView btnNight, btnWord, btnExit;
 View view;
 boolean isOut, isIn;// 是否弹窗显示

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  initView();
  initData();
 }

 /**
  * 初始化组件
  */
 private void initView() {
  hideView = (TextView) findViewById(R.id.hideView);

  LayoutInflater inflater = LayoutInflater.from(this);
  // 引入窗口配置文件 - 即弹窗的界面
  view = inflater.inflate(R.layout.menu_view, null);
  btnNight = (ImageView) view.findViewById(R.id.btnNight);
  btnWord = (ImageView) view.findViewById(R.id.btnWord);
  btnExit = (ImageView) view.findViewById(R.id.btnExit);
  btnCancel = (Button) view.findViewById(R.id.btnCancel);

 }

 /**
  * 初始化数据
  */
 private void initData() {
  btnNight.setOnClickListener(this);
  btnWord.setOnClickListener(this);
  btnExit.setOnClickListener(this);
  btnCancel.setOnClickListener(this);
  view.setFocusableInTouchMode(true);
  view.setOnKeyListener(this);
  // PopupWindow实例化
  pop = new PopupWindow(view, LayoutParams.MATCH_PARENT,
    LayoutParams.WRAP_CONTENT, true);
  /**
   * PopupWindow 设置
   */
  // pop.setFocusable(true); //设置PopupWindow可获得焦点
  // pop.setTouchable(true); //设置PopupWindow可触摸
  // pop.setOutsideTouchable(true); // 设置非PopupWindow区域可触摸
  // 设置PopupWindow显示和隐藏时的动画
  pop.setAnimationStyle(R.style.MenuAnimationFade);
  /**
   * 改变背景可拉的弹出窗口。后台可以设置为null。 这句话必须有，否则按返回键popwindow不能消失 或者加入这句话
   * ColorDrawable dw = new
   * ColorDrawable(-00000);pop.setBackgroundDrawable(dw);
   */
  pop.setBackgroundDrawable(new BitmapDrawable());

 }

 /**
  * 按钮点击事件监听
  * 
  * @param v
  */
 @Override
 public void onClick(View v) {
  switch (v.getId()) {
  case R.id.btnNight:
   changePopupWindowState();
   Toast.makeText(MainActivity.this, "你点击了夜间模式", Toast.LENGTH_SHORT)
     .show();
   break;
  case R.id.btnWord:
   changePopupWindowState();
   Toast.makeText(MainActivity.this, "你点击了文本模式", Toast.LENGTH_SHORT)
     .show();
   break;
  case R.id.btnExit:
   exitTheDemo();
   break;
  case R.id.btnCancel:
   changePopupWindowState();
   break;
  }
 }

 /**
  * 退出程序
  */
 private void exitTheDemo() {
  changePopupWindowState();
  new AlertDialog.Builder(MainActivity.this).setMessage("确定退出这个 Demo 吗？")
    .setPositiveButton("确定", new DialogInterface.OnClickListener() {

     @Override
     public void onClick(DialogInterface dialog, int which) {
      finish();
     }
    }).setNegativeButton("取消", null).show();
 }

 /**
  * 改变 PopupWindow 的显示和隐藏
  */
 private void changePopupWindowState() {
  if (pop.isShowing()) {
   // 隐藏窗口，如果设置了点击窗口外消失，则不需要此方式隐藏
   pop.dismiss();
  } else {
   // 弹出窗口显示内容视图,默认以锚定视图的左下角为起点，这里为点击按钮
   pop.showAtLocation(hideView, Gravity.BOTTOM, 0, 0);
  }
 }

 // Called when a key was pressed down and not handled by any of the views
 // inside of the activity
 @Override
 public boolean onKeyDown(int keyCode, KeyEvent event) {
  switch (keyCode) {
  case KeyEvent.KEYCODE_MENU:// 菜单键监听
   isOut = true;
   changePopupWindowState();
   break;
  }
  return super.onKeyDown(keyCode, event);
 }

 // Called when a hardware key is dispatched to a view.
 @Override
 public boolean onKey(View v, int keyCode, KeyEvent event) {
  switch (keyCode) {
  case KeyEvent.KEYCODE_MENU:
   if (isOut && !isIn) {
    isOut = false;
    isIn = true;
   } else if (!isOut && isIn) {
    isIn = false;
    changePopupWindowState();
   }
   break;
  }
  return false;
 }

}