Android中ContextMenu用法实例

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android" Android:orientation="vertical" Android:layout_width="fill_parent" Android:layout_height="fill_parent" ><ListView Android:id="@android:id/list" Android:layout_width="fill_parent" Android:layout_height="fill_parent"></ListView></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android" Android:layout_width="wrap_content" Android:layout_height="wrap_content" Android:orientation="vertical"> <TextView  Android:id="@+id/label"  Android:layout_width="fill_parent"  Android:layout_height="wrap_content"  Android:textSize="30sp"></TextView></LinearLayout>

package com.yyl;import Android.app.ListActivity;import Android.os.Bundle;import Android.view.ContextMenu;import Android.view.ContextMenu.ContextMenuInfo;import Android.view.Menu;import Android.view.MenuItem;import Android.view.View;import Android.widget.ArrayAdapter;public class MenuDemoActivity extends ListActivity { public static final int EIGHT_ID = Menu.FIRST+1; public static final int SIXTEEN_ID = Menu.FIRST+2; public static final int TWENTY_FOUR_ID = Menu.FIRST+3; public static final int TWO_ID = Menu.FIRST+4; public static final int THIRTY_TWO_ID = Menu.FIRST+5; public static final int FORTY_ID = Menu.FIRST+6; public static final int ONE_ID = Menu.FIRST+7; String[] items={"lorem", "ipsum", "dolor", "sit", "amet",   "consectetuer", "adipiscing", "elit", "morbi", "vel",   "ligula", "vitae", "arcu", "aliquet", "mollis",   "etiam", "vel", "erat", "placerat", "ante",   "porttitor", "sodales", "pellentesque", "augue", "purus"}; @Override public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.main);  setListAdapter(new ArrayAdapter(this,R.layout.simple_list_item_1,R.id.label,items));  //注册ContextView到view中  registerForContextMenu(getListView()); } //重写该方法，生成ContextMenu菜单 @Override public void onCreateContextMenu(ContextMenu menu, View v,   ContextMenuInfo menuInfo) {  this.populateMenu(menu);  super.onCreateContextMenu(menu, v, menuInfo); } private void populateMenu(Menu menu) {  menu.add(Menu.NONE, ONE_ID, Menu.NONE, "1 Pixel");  menu.add(Menu.NONE, TWO_ID, Menu.NONE, "2 Pixels");  menu.add(Menu.NONE, EIGHT_ID, Menu.NONE, "8 Pixels");  menu.add(Menu.NONE, SIXTEEN_ID, Menu.NONE, "16 Pixels");  menu.add(Menu.NONE, TWENTY_FOUR_ID, Menu.NONE, "24 Pixels");  menu.add(Menu.NONE, THIRTY_TWO_ID, Menu.NONE, "32 Pixels");  menu.add(Menu.NONE, FORTY_ID, Menu.NONE, "40 Pixels"); }}