很多App,都有二级菜单出现,但android 本身实现的菜单又比较难看;前些天我自己思想了一个,供大家学习,为方便学习,这里我只用最简单的字符串菜单,如果大家想用更复杂或好看的,可以自定义listview 的子项即可。

一.首先看一下实现思路:

       

android 多级下拉菜单实现教程_android

 1. 使用上方按钮来弹出一级菜单,如果在弹出状态,再点击隐藏;

 2. 点击一级菜单子项,弹出二级菜单,二级菜单里面也是一个listview 控件;

 3. 点击二级菜单点击菜单的内容;

 二 .实现

 就是这么简单,下面来看一下具体实现:

 1.在AndroidManifest.xml 设置主题为NoTitleBar


android:theme="@style/Theme.AppCompat.NoActionBar">

2.在布局文件中添加自定义titlebar,并添加 listview 控件在title 下方,见布局文件;


<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.shrg.jackli.morelevelmenu.MainActivity">

<LinearLayout
android:id="@+id/titlebar"
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal"
android:background="@android:color/black"
android:gravity="center_vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="showListMenu"
android:src="@mipmap/ic_menu"
/>
</LinearLayout>
<ListView
android:id="@+id/listView"
android:background="@android:color/holo_blue_dark"
android:layout_below="@id/titlebar"
android:layout_width="100dp"
android:layout_height="wrap_content"
></ListView>

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:textSize="25sp"
android:id="@+id/textView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />

</RelativeLayout>

3.程序中将listview 控件关联起来 ,将listview 填充数据,监听listview 每一项


mListView =(ListView)findViewById(R.id.listView);
mListView.setVisibility(View.GONE);
mListView.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,province));

mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
pop_listView.setAdapter(new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_list_item_1,pandc[position]));
firstMenuIndex = position;
popupWindow.showAsDropDown(mListView,view.getMeasuredWidth(),-mListView.getMeasuredHeight());
}
});

4.初始化popuwindow,监听popuwindow中listview 中子项,

监听到点击二级菜单后隐藏一级和二级菜单


private void initPopupWindow() {
pop_listView = (ListView)LayoutInflater.from(this).inflate(R.layout.popupwindow,null);
pop_listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
showText.setText(pandc[firstMenuIndex][position]);
popupWindow.dismiss();
mListView.setVisibility(View.GONE);
}
});

popupWindow = new PopupWindow(pop_listView, 150,
ViewGroup.LayoutParams.WRAP_CONTENT);

popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
popupWindow.setFocusable(true);
}

 效果图:

android 多级下拉菜单实现教程_android_02

​​demo 下载地址​​