不知道android:onclick这个属性大家熟悉么,我是看apidemos里边的一个例子 popupmenu发现它的
首先给大家看看代码
/* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.example.android.apis.view; import android.app.Activity; import android.os.Bundle; import android.view.MenuItem; import android.view.View; import android.widget.PopupMenu; import android.widget.Toast; import com.example.android.apis.R; /** * This demonstrates the use of the PopupMenu class. Clicking the button will * inflate and show a popup menu from an XML resource. */ public class PopupMenu1 extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.popup_menu_1); } public void onPopupButtonClick(View button) { PopupMenu popup = new PopupMenu(this, button); popup.getMenuInflater().inflate(R.menu.popup, popup.getMenu()); popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { public boolean onMenuItemClick(MenuItem item) { Toast.makeText(PopupMenu1.this, "Clicked popup menu item " + item.getTitle(), Toast.LENGTH_SHORT).show(); return true; } }); popup.show(); } }
<?xml version="1.0" encoding="utf-8"?> <!-- Copyright (C) 2010 Google Inc. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:onClick="onPopupButtonClick" android:text="@string/popup_menu_button" /> </LinearLayout>