Android自定义下拉菜单/弹出菜单 [英] Android custom dropdown/popup menu
问题描述
如何自定义下拉式/弹出式菜单固定在按钮上?
How do I do a custom dropdown/popup menu anchored to a button?
我需要它像弹出菜单(锚定到视图),以及当我从菜单中单击一个项目时,请执行某些操作。
I need it to work like the popup menu (anchored to a view), and do something when I click an item from the menu.
如何通过代码添加项目到菜单中,保持菜单的高度,如果有超过5个项目可以滚动。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
在android中创建弹出菜单
To create popup menu in android.
activity_main.xml
activity_main.xml
它只包含一个按钮。
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所示。它是在res / menu目录下创建的。
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>
活动类
它显示弹出式窗口菜单上的按钮单击。
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
}
}
关注此链接以编程方式创建菜单。
Follow this link for creating menu programmatically.
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