Android的定制下拉/弹出菜单 [英] Android custom dropdown/popup menu
问题描述
我该怎么做锚定到一个按钮自定义下拉/弹出菜单?
How do I do a custom dropdown/popup menu anchored to a button?
我需要它的工作,如弹出菜单(锚定到一个视图),并做当我点击菜单中的项目什么的。
I need it to work like the popup menu (anchored to a view), and do something when I click an item from the menu.
我如何将项目添加到菜单,code,保持菜单的高度,使其滚动的,如果有超过5个项目。我不需要添加任何图像,只是文本。
How do I add items to the menu by code, keeping menu's height and make it scrollable if there are more than 5 items. I don't need to add any images, just text.
推荐答案
要创建弹出菜单中的机器人。
To create popup menu in android.
activity_main.xml
activity_main.xml
它只有一个按钮。
文件:activity_main.xml
File: activity_main.xml
<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="62dp"
android:layout_marginTop="50dp"
android:text="Show Popup" />
</RelativeLayout>
popup_menu.xml
popup_menu.xml
它包含三个项目如下显示。它是在RES /菜单目录中创建的。 文件:poupup_menu.xml
It contains three items as show below. It is created inside the res/menu directory. File: poupup_menu.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/one"
android:title="One"/>
<item
android:id="@+id/two"
android:title="Two"/>
<item
android:id="@+id/three"
android:title="Three"/>
</menu>
Activity类
Activity class
它显示按钮在弹出的菜单中。 文件:MainActivity.java
It displays the popup menu on button click. File: MainActivity.java
public class MainActivity extends Activity {
private Button button1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//Creating the instance of PopupMenu
PopupMenu popup = new PopupMenu(MainActivity.this, button1);
//Inflating the Popup using xml file
popup.getMenuInflater()
.inflate(R.menu.popup_menu, popup.getMenu());
//registering popup with OnMenuItemClickListener
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
Toast.makeText(
MainActivity.this,
"You Clicked : " + item.getTitle(),
Toast.LENGTH_SHORT
).show();
return true;
}
});
popup.show(); //showing popup menu
}
}); //closing the setOnClickListener method
}
}
请<一href="http://stackoverflow.com/questions/13784088/setting-popupmenu-menu-items-programmatically">this链接创建菜单编程。 <一href="http://stackoverflow.com/questions/13784088/setting-popupmenu-menu-items-programmatically">This链接,自定义它。
Follow this link for creating menu programmatically. This link for customizing it.
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