PopupWindow与PopupMenu的用法

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