java Android - 在点击 ActionBar 按钮时创建一个 PopupMenu
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Android - Creating a PopupMenu on clicking an ActionBar button
提问by ARampal
I am trying to make a PopupMenu appear after I click a button in an action bar.
我试图在单击操作栏中的按钮后显示 PopupMenu。
I have got the buttons in the file - action.xmlin the 'menu' folder.
我有文件中的按钮 -action.xml在“ menu”文件夹中。
This contains the buttons for the ActionBar.
这包含 ActionBar 的按钮。
<item
android:id="@+id/overflow"
android:icon="@drawable/ic_action_overflow"
android:orderInCategory="2"
android:menuCategory="container"
android:title="Overflow Button"
android:showAsAction="ifRoom|withText"
android:onClick="**showPopup**"
/>
<item
android:id="@+id/add"
android:icon="@drawable/add"
android:title="Add Button"
android:orderInCategory="100"
android:showAsAction="ifRoom|withText"
android:onClick="**showPopup**"
/>
Once a button is clicked I wish to have a PopupMenuto be shown. The showPopupmethod is located in the FragmentActivityclass:
单击按钮后，我希望PopupMenu显示一个。该showPopup方法位于FragmentActivity类中：
public void showPopup(MenuItem v) {
PopupMenu popup = new PopupMenu(this, this.getCurrentFocus());
popup.inflate(R.layout.pop);
popup.show();
}
The pop.xmlfile is stored in the layout folder (and contains the view of the pop up menu)
该pop.xml文件存储在布局文件夹中（并包含弹出菜单的视图）
Unfortunately this is giving me a RuntimeException java.lang.reflect.InvocationTargetException.
不幸的是，这给了我一个RuntimeException java.lang.reflect.InvocationTargetException.
Any ideas?
有任何想法吗？
Help would be greatly appreciated.
帮助将不胜感激。
回答by Mike Shadoff
First of all, this is quite easy.
首先，这很容易。
You have to add this attribute to your actionBar item.
您必须将此属性添加到您的 actionBar 项目。
android:onClick="openPopup"
openPopupis your popup method.
openPopup是你的弹出方法。
Then, in your MainActivitywhich is by the way supposed to extend ActionBarActivity
you have to add your method that will be called onClick.
然后，在MainActivity应该扩展的方式中，ActionBarActivity
您必须添加将被调用的方法onClick。
public void openPopup(MenuItem item){
Point p;
p.x = 0;
p.y = 0;
showPopup(MainActivity.this, p);
Toast.makeText(this, "Popup Should Open", Toast.LENGTH_LONG).show();
}
And of course the showPopupmethod.
当然还有showPopup方法。
private void showPopup(final Activity context, Point p) {
// Inflate the popup_layout.xml
LinearLayout viewGroup = (LinearLayout) context.findViewById(R.id.popup);
LayoutInflater layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = layoutInflater.inflate(R.layout.popup_layout, viewGroup);
// Creating the PopupWindow
final PopupWindow popup = new PopupWindow(context);
popup.setContentView(layout);
popup.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
popup.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
popup.setFocusable(true);
popupWidth = popup.getWidth();
// Clear the default translucent background
popup.setBackgroundDrawable(new BitmapDrawable(this.getResources()));
// Displaying the popup at the specified location.
popup.showAtLocation(layout, Gravity.NO_GRAVITY, p.x, p.y);
// Getting a reference to Close button, and close the popup when clicked.
Button close = (Button) layout.findViewById(R.id.close);
close.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
popup.dismiss();
}
});
}
That's it.
而已。
回答by Tarun
I would like to share the way I do it. Let us say we have a Button(or any clicakbale view be it anywhere) with id "btn" and we want to attach a popupMenu on its click. Put the menu you want to display in menu folder in following xml say "menu1.xml".
我想分享我的做法。假设我们有一个 ID 为“btn”的 Button（或任何地方的任何 clicakbale 视图），我们想在点击时附加一个 popupMenu。将要显示的菜单放在下面的 xml 中的菜单文件夹中，说“menu1.xml”。
OnClick of button is defined as follows :
按钮的 OnClick 定义如下：
Button btn = (Button) findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showPopupMenu(v);
}
});
showPopupMenu() is defined as below :
showPopupMenu() 定义如下：
private void showPopupMenu(View view) {
// inflate menu and attach it to a view onClick of which you want to display menu
PopupMenu popup = new PopupMenu(mContext, view);
MenuInflater inflater = popup.getMenuInflater();
//inflate menu items to popup menu
inflater.inflate(R.menu.menu1, popup.getMenu());
//assign a cutom onClick Listener to it.
popup.setOnMenuItemClickListener(new MyMenuItemClickListener());
//Show Popup.
popup.show();
}
Complete post can be found here : http://revisitingandroid.blogspot.in/2017/01/how-to-display-popup-menu-on-any-view.html
完整的帖子可以在这里找到：http: //revisitingandroid.blogspot.in/2017/01/how-to-display-popup-menu-on-any-view.html
回答by Waqas Memon
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="20sp"
android:textColor="#000000"
android:layout_margin="20dip"
android:text="Popup Menu Example" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Touch here to see the menu."
android:layout_margin="20dip"
android:layout_gravity="center"
android:textColor="#0000ff"
android:id="@+id/anchor"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="20dip"
android:layout_gravity="center"
android:textSize="40sp"
android:textColor="#808080"
android:id="@+id/selection"/>
</LinearLayout>
package com.authorwjf.popmenu;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.PopupMenu;
import android.widget.PopupMenu.OnMenuItemClickListener;
import android.widget.TextView;
import android.app.Activity;
public class Main extends Activity implements OnClickListener, OnMenuItemClickListener
{
private PopupMenu popupMenu;
private final static int ONE = 1;
private final static int TWO = 2;
private final static int THREE = 3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
popupMenu = new PopupMenu(this, findViewById(R.id.anchor));
popupMenu.getMenu().add(Menu.NONE, ONE, Menu.NONE, "Item 1");
popupMenu.getMenu().add(Menu.NONE, TWO, Menu.NONE, "Item 2");
popupMenu.getMenu().add(Menu.NONE, THREE, Menu.NONE, "Item 3");
popupMenu.setOnMenuItemClickListener(this);
findViewById(R.id.anchor).setOnClickListener(this);
}
}
@Override
public void onClick(View v) {
popupMenu.show();
}
@Override
public boolean onMenuItemClick(MenuItem item) {
TextView tv = (TextView) findViewById(R.id.selection);
switch (item.getItemId()) {
case ONE:
tv.setText("ONE");
break;
case TWO:
tv.setText("TWO");
break;
case THREE:
tv.setText("THREE");
break;
}
return false;
}
