PopupWindow与PopupMenu的用法

@(Blog)[马克飞象|Markdown|Android]

PopupWindow与PopupMenu的用法
- PopupMenu
- PopupWindow

PopupWindow和PopupMenu的功能都是为了弹出一个窗体，不过PopupMenu的功能比较单一，而PopupWindow更强。

PopupMenu

<menu xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    tools:context="com.example.focus.androidnote.popupwindow.PopupWindowActivity">    <item         android:id="@+id/action_refresh"         android:title="@string/action_refresh"        android:orderInCategory="100"         app:showAsAction="never" />    <item android:id="@+id/action_settings"         android:title="@string/action_settings"        android:orderInCategory="100"         app:showAsAction="never" />menu>

public class PopupWindowActivity extends BaseActivity {    private Button mPopWindowBtn;    private Button mPopMenuBtn;    private View mPopWindowView;    private PopupWindow mPopWindow;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_popup_window);        mPopWindowBtn = (Button) findViewById(R.id.pop_window_btn);        mPopMenuBtn = (Button) findViewById(R.id.pop_menu_btn);        mPopMenu = new PopupMenu(mContext, mPopMenuBtn);        mPopMenu = new PopupMenu(mContext, mPopMenuBtn);        mPopMenu.getMenuInflater().inflate(R.menu.menu_popup_window, mPopMenu.getMenu());    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.menu_popup_window, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        int id = item.getItemId();        if (id == R.id.action_settings) {            Toast.makeText(mContext, "Settings", Toast.LENGTH_SHORT).show();        } else if (id == R.id.action_refresh) {            Toast.makeText(mContext, "Refresh", Toast.LENGTH_SHORT).show();        }        return true;    }    public void popMenuBtnOnClick(View view) {        mPopMenu.show();    }}

上面的代码最主要的只有3行

mPopMenu = new PopupMenu(mContext, mPopMenuBtn);mPopMenu.getMenuInflater().inflate(R.menu.menu_popup_window, mPopMenu.getMenu());

很简单，只需要两行代码就搞定了。
期初我以为PopupMenu会和Activity的Menu共用Click事件的，但是实现onOptionsItemSelected方法后发现只有Activity的Menu会触发事件，mPopMenu依然要通过setOnMenuItemClickListener()才能实现点击事件的监听

PopupWindow

PopupWindow相比menu功能要强的多，可以实现布局更加复杂的效果

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical" android:layout_width="100dp"    android:layout_height="120dp"    android:background="@drawable/bg_pop_window">    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"        android:layout_marginTop="20dp"        android:background="@android:color/transparent"        android:text="@string/action_settings"        android:textColor="@android:color/white"        android:textAllCaps="false"/>    <View        android:layout_width="wrap_content"        android:layout_height="2dp"        android:background="@color/material_blue_grey_800"/>    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"        android:background="@android:color/transparent"        android:text="@string/action_refresh"        android:textColor="@android:color/white"        android:textAllCaps="false"/>LinearLayout>

mPopWindowView = getLayoutInflater().inflate(R.layout.pop_window_layout, null);// Focusable 为True，PopupWindow的点击事件才会相应mPopWindow = new PopupWindow(mPopWindowView, 150, 120, true);// 必须在代码中设置一下背景色，点击外面不会隐藏此弹窗mPopWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));// Focusable 为False时，不执行则点击外面不会隐藏此弹窗//mPopWindow.setOutsideTouchable(true); // 显示 默认显示View的正下方，可以使用重载方法设置偏移量来调整位置mPopWindow.showAsDropDown(view);

其实用法和Menu差不多，只是背景色必须要在代码里进行设置，否则点击外面窗体不会消失，不知道这是BUG，还是Google就是这么设计的，有点想不通。

android:textAllCaps=”false” 防止Refresh显示的时候展现为全部大写
Focusable属性，发现如果设为false的window内的组件就无法收到onClick事件

PopupWindow与PopupMenu的用法

PopupWindow与PopupMenu的用法

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