详解Android之用PopupWindow实现弹出菜单的方法

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使用UCWeb浏览器时,您会发现其弹出菜单与系统自带的菜单不同,它实现了更多菜单选项的显示,其实通过适配器转换可以很容易地实现菜单选项视图的切换,下面是爱站技术频道小编带给大家详解之用PopupWindow实现弹出菜单的方法。


点击下载该实例:
一、运行截图:

 详解Android之用PopupWindow实现弹出菜单的方法-第1张图片

 

 详解Android之用PopupWindow实现弹出菜单的方法-第2张图片

二、实现要点:
(1)屏蔽系统弹出的菜单:
1、首先创建至少一个系统的菜单选项

 

@Override
 public boolean onCreateOptionsMenu(Menu menu) {

  menu.add("menu");
  return super.onCreateOptionsMenu(menu);
 }


2、在onMenuOpened方法里显示自己的菜单视图,并返回FALSE。

 

 

 


@Override
 public boolean onMenuOpened(int featureId, Menu menu) {
  myMenu.showAtLocation(findViewById(R.id.layout), Gravity.BOTTOM, 0,0);

  return false; // true--显示系统自带菜单;false--不显示。
 }


(2)点击菜单栏,切换菜单视图时,只要重新设置当前的适配器对象就可以。

 

 

 


gv_body.setAdapter(bodyAdapter[arg2]); //改变选项视图


(3)继承PopupWindow,重写一个类实现弹出对话框,主要是为了更好更简便实现弹出菜单的样式和事件响应等等。

 

 

 


public class MyDefinedMenu extends PopupWindow { 。。。}


三、 具体代码如下:
(1)布局:

 

 

 


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/layout"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
</LinearLayout>


(2)程序代码
1、主类:MyMenu

 

 

 


package com.myandroid.test;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Toast;
public class MyMenu extends Activity {
 private List<String> titles; //标题栏
 private List<List<String>> item_names; //选项名称
 private List<List<Integer>> item_images; //选项图标
 private MyDefinedMenu myMenu; //弹出菜单

 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        //弹出菜单标题栏
        titles = addItems(new String[]{"菜单一", "菜单二", "菜单三"});
        //选项图标
        item_images = new ArrayList<List<Integer>>();
        item_images.add(addItems(new Integer[]{R.drawable.bag,
         R.drawable.bluetooth, R.drawable.earth, R.drawable.email}));
        item_images.add(addItems(new Integer[]{R.drawable.map,
             R.drawable.news, R.drawable.reader, R.drawable.sound, R.drawable.tape}));
        item_images.add( addItems(new Integer[]{R.drawable.telephone,
             R.drawable.bluetooth, R.drawable.earth, R.drawable.email}));
        //选项名称
        item_names = new ArrayList<List<String>>();
        item_names.add(addItems(new String[]{"购物", "蓝牙", "游览器", "邮件"}));
        item_names.add(addItems(new String[]{"地图", "新闻", "阅读器", "音箱", "录音"}));
        item_names.add(addItems(new String[]{"电话", "蓝牙", "阅读器", "邮箱"}));
        //创建弹出菜单对象
  myMenu = new MyDefinedMenu(this, titles, item_names,
    item_images, new ItemClickEvent());

    }

    /**
     * 转换为List<String>
     * @param values
     * @return
     */
    private List<String> addItems(String[] values) {

     List<String> list = new ArrayList<String>();
     for (String var : values) {
   list.add(var);
  }

     return list;
    }

    /**
     * 转换为List<Integer>
     * @param values
     * @return
     */
    private List<Integer> addItems(Integer[] values) {

     List<Integer> list = new ArrayList<Integer>();
     for (Integer var : values) {
   list.add(var);
  }

     return list;
    }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {

  menu.add("menu");
  return super.onCreateOptionsMenu(menu);
 }
 @Override
 public boolean onMenuOpened(int featureId, Menu menu) {
  myMenu.showAtLocation(findViewById(R.id.layout), Gravity.BOTTOM, 0,0);

  return false; // true--显示系统自带菜单;false--不显示。
 }

 /**
  * 菜单选项点击事件
  * @author Kobi
  *
  */
 class ItemClickEvent implements OnItemClickListener {
  @Override
  public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
    long arg3) {
   //显示点击的是哪个菜单哪个选项。
   Toast.makeText(MyMenu.this, "Menu: " +
     titles.get(myMenu.getTitleIndex()) +
     " Item: " + item_names.get(myMenu.getTitleIndex()).get(arg2),
     Toast.LENGTH_SHORT).show();
   myMenu.dismiss(); //菜单消失
  }

 } 
}


2、弹出菜单类:MyDefinedMenu、

 

 

 


package com.myandroid.test;
import java.util.List;
import com.myandroid.test.MyMenu.ItemClickEvent;
import android.content.Context;
import android.graphics.Color;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
public class MyDefinedMenu extends PopupWindow {

 private LinearLayout layout; //总的布局
 private GridView gv_title;  //菜单栏
 private GridView gv_body;  //选项视图
 private BodyAdatper[] bodyAdapter; //选项适配器
 private TitleAdatper titleAdapter; //标题适配器
 private Context context;   //上下文
 private int titleIndex;    //菜单序号

 

 public MyDefinedMenu(Context context, List<String> titles,
   List<List<String>> item_names, List<List<Integer>> item_images,
   ItemClickEvent itemClickEvent) {

  super(context);
  this.context = context;

  //布局框架
  layout = new LinearLayout(context);  
  layout.setOrientation(LinearLayout.VERTICAL);
  layout.setLayoutParams(new LayoutParams(
    LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

  //菜单栏
     titleIndex = 0;
  gv_title = new GridView(context);
  titleAdapter = new TitleAdatper(context, titles);
  gv_title.setAdapter(titleAdapter);
  gv_title.setLayoutParams(new LayoutParams(
    LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
  gv_title.setNumColumns(titles.size()); //菜单个数
  gv_title.setBackgroundColor(Color.WHITE);

  //选项视图
  bodyAdapter = new BodyAdatper[item_names.size()]; //各个视图适配器
  for (int i = 0; i < item_names.size(); i++) {
   bodyAdapter[i] = new BodyAdatper(context, item_names.get(i), item_images.get(i));
  }
  gv_body = new GridView(context);
  gv_body.setNumColumns(4); //每行显示4个选项
  gv_body.setBackgroundColor(Color.TRANSPARENT);
  gv_body.setAdapter(bodyAdapter[0]); //设置适配器

  //菜单项切换
  gv_title.setOnItemClickListener(new OnItemClickListener() {
   @Override
   public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
     long arg3) {
    titleIndex = arg2; //记录当前选中菜单项序号
    titleAdapter.setFocus(arg2);
    gv_body.setAdapter(bodyAdapter[arg2]); //改变选项视图
   }
  });

  //设置选项点击事件
  gv_body.setOnItemClickListener(itemClickEvent);

  //添加标题栏和选项
  layout.addView(gv_title);
  layout.addView(gv_body);

  // 添加菜单视图
  this.setContentView(layout);
  this.setWidth(LayoutParams.FILL_PARENT);
  this.setHeight(LayoutParams.WRAP_CONTENT);
  this.setFocusable(true);// menu菜单获得焦点 如果没有获得焦点menu菜单中的控件事件无法响应 

 }

 /**
  * 获取当前选中菜单项
  * @return 菜单项序号
  */
 public int getTitleIndex() {

  return titleIndex;
 }

}


 3、菜单栏适配器:TitleAdatper

 

 

 


package com.myandroid.test;
import java.util.List;
import android.content.Context;
import android.graphics.Color;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.TextView;
public class TitleAdatper extends BaseAdapter {
 private List<String> titles;
 private Context context;
 private final TextView[] tv_titels;

 
 public TitleAdatper(Context context, List<String> titles) {
  this.context = context;
  this.titles = titles;
  tv_titels = new TextView[titles.size()];
 }
 @Override
 public int getCount() {
  // TODO Auto-generated method stub
  return titles.size();
 }
 @Override
 public Object getItem(int position) {
  // TODO Auto-generated method stub
  return position;
 }
 @Override
 public long getItemId(int position) {
  // TODO Auto-generated method stub
  return position;
 }

 /**
  * 选中后,改变菜单颜色。
  * @param position
  */
 public void setFocus(int position) {

  for (int i = 0; i < titles.size(); i++) {

   tv_titels[i].setBackgroundColor(Color.WHITE);
  }

  tv_titels[position].setBackgroundColor(Color.BLUE);

 }
 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  //菜单栏文字项
  tv_titels[position] = new TextView(context);
  tv_titels[position].setGravity(Gravity.CENTER);
  tv_titels[position].setText(titles.get(position));
  tv_titels[position].setTextSize(18);
  tv_titels[position].setLayoutParams(new GridView.LayoutParams(
    LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

  return tv_titels[position];
 }
}


 4、菜单项视图适配器:BodyAdatper

 

 

 


package com.myandroid.test;
import java.util.List;
import android.content.Context;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class BodyAdatper extends BaseAdapter {

 private List<String> item_names;
 private List<Integer> item_images;
 private Context context;

 
 public BodyAdatper(Context context, List<String> item_names,
   List<Integer> item_images) {
  this.context = context;
  this.item_names = item_names;
  this.item_images = item_images;
 }
 @Override
 public int getCount() {
  // TODO Auto-generated method stub
  return item_images.size();
 }
 @Override
 public Object getItem(int position) {
  // TODO Auto-generated method stub
  return position;
 }
 @Override
 public long getItemId(int position) {
  // TODO Auto-generated method stub
  return position;
 }

 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  //总布局
  LinearLayout layout = new LinearLayout(context);
  layout.setOrientation(LinearLayout.VERTICAL);
  layout.setGravity(Gravity.CENTER);
  //选项名称
  TextView tv_item = new TextView(context);
  tv_item.setGravity(Gravity.CENTER);
  tv_item.setLayoutParams(new GridView.LayoutParams(
    LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
  tv_item.setText(item_names.get(position));
  //选项图表
  ImageView img_item = new ImageView(context);
  img_item.setLayoutParams(new LayoutParams(50, 50));
  img_item.setImageResource(item_images.get(position));
  //添加选项图标和名字
  layout.addView(img_item);
  layout.addView(tv_item);

  return layout;
 }
}


这里是用PopupWindow实现,当然也可以用AlertDialog或者其他自定义对话框等等,也可以改写Menu,还可以用Tab实现。实现的方法很多,但原理是相同的,例如用两个GridView,一个作为菜单栏,一个作为菜单项视图。

上文是爱站技术频道小编为大家介绍的详解Android之用PopupWindow实现弹出菜单的方法,希望对你有帮助,也希望大家能一如既往的支持爱站技术频道!

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