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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:
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="/apk/res/android"xmlns:tools="/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context="com.shrg.jackli.morelevelmenu.MainActivity"><LinearLayoutandroid:id="@+id/titlebar"android:layout_width="match_parent"android:layout_height="40dp"android:orientation="horizontal"android:background="@android:color/black"android:gravity="center_vertical"><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:onClick="showListMenu"android:src="@mipmap/ic_menu"/></LinearLayout><ListViewandroid: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><TextViewandroid: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() {@Overridepublic 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() {@Overridepublic 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:
demo 下载地址