android控件之menu(一)

MytestActivity.java

package com.android.demo;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.widget.TextView;import android.widget.Toast;public class MytestActivity extends Activity {public TextView myTextView;public static final int NUM1 = Menu.FIRST;      public static final int NUM2 = Menu.FIRST+1;      public static final int NUM3 = Menu.FIRST+2;     public static final int NUM4 = Menu.FIRST+3;      public static final int NUM5 = Menu.FIRST+4;      public static final int NUM6 = Menu.FIRST+5;     public static final int NUM7 = Menu.FIRST+6;     /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                myTextView = (TextView)findViewById(R.id.myTextView);            }@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// TODO Auto-generated method stubmenu.add(0, NUM1, 1, "选项1").setIcon(android.R.drawable.star_big_off);menu.add(0, NUM2, 2, "选项2").setIcon(android.R.drawable.star_big_on);menu.add(0, NUM3, 3, "选项3").setIcon(android.R.drawable.ic_menu_add);menu.add(0, NUM4, 4, "选项4").setIcon(android.R.drawable.ic_menu_camera);menu.add(0, NUM5, 5, "选项5");menu.add(0, NUM6, 6, "选项6");menu.add(0, NUM7, 7, "选项7");return super.onCreateOptionsMenu(menu);}@Overridepublic boolean onMenuItemSelected(int featureId, MenuItem item) {// TODO Auto-generated method stubswitch(item.getItemId()){case NUM1:myTextView.setText("选项1");break;case NUM2:myTextView.setText("选项2");break;case NUM3:myTextView.setText("选项3");break;case NUM4:myTextView.setText("选项4");break;case NUM5:myTextView.setText("选项5");break;case NUM6:myTextView.setText("选项6");break;case NUM7:myTextView.setText("选项7");break;}return super.onMenuItemSelected(featureId, item);}@Overridepublic void onOptionsMenuClosed(Menu menu) {// TODO Auto-generated method stubToast.makeText(this, "选项菜单关闭了", Toast.LENGTH_SHORT).show();super.onOptionsMenuClosed(menu);}@Overridepublic boolean onPrepareOptionsMenu(Menu menu) {// TODO Auto-generated method stubToast.makeText(this, "选项菜单显示之前onPrepareOptionsMenu方法会被调用，你可以用此方法来根据打当时的情况调整菜单", Toast.LENGTH_SHORT).show();return super.onPrepareOptionsMenu(menu);}}

main.xml

<?xml version="1.0" encoding="utf-8"?><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:id="@+id/myTextView"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/hello" /></LinearLayout>

结果如图