@(Blog)[马克飞象|Markdown|Android]
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。
<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相比menu功能要强的多,可以实现布局更加复杂的效果
<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