Android PopupMenu弹出菜单的实现

（1）布局文件：用于弹出菜单的处罚button：

<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="96dp" android:layout_marginTop="111dp" android:onClick="showPopup" android:text="弹出菜单" /> </RelativeLayout>

（2）res-menu目录下的main.xml文件：

<menu xmlns:android="http://schemas.android.com/apk/res/android" > <item android:id="@+id/open" android:orderInCategory="100" android:showAsAction="never" android:title="@string/open"/> <item android:id="@+id/close" android:orderInCategory="100" android:showAsAction="never" android:title="@string/close"/> </menu>

（3）类的文件：

package com.example.menu_popupmenu; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.PopupMenu; public class MainActivity extends Activity { private Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void showPopup(View view) { PopupMenu popupMenu = new PopupMenu(MainActivity.this, view); popupMenu.getMenuInflater().inflate(R.menu.main, popupMenu.getMenu()); popupMenu.show(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } }

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