android之OptionsMenu

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首先編寫res/layout/Activity_main.xml

代碼如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/MyLayout"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent" ><TextView     android:id="@+id/txt"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="按下Menu鍵出現選項菜單"/>    </LinearLayout>

　　然後編寫Activity類相應的代碼

代碼如下：

package com.example.myandroid;import android.os.Bundle;import android.app.Activity;import android.app.TabActivity;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.widget.TabHost;import android.widget.TabHost.TabSpec;import android.widget.Toast;public class MainActivity extends Activity {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {    menu.add(Menu.NONE,Menu.FIRST+1,5,"刪除")    .setIcon(android.R.drawable.ic_menu_delete);        menu.add(Menu.NONE,Menu.FIRST+2,2,"儲存")    .setIcon(android.R.drawable.ic_menu_save);        menu.add(Menu.NONE,Menu.FIRST+3,6,"協助")    .setIcon(android.R.drawable.ic_menu_help);        menu.add(Menu.NONE,Menu.FIRST+4,1,"添加")    .setIcon(android.R.drawable.ic_menu_add);        menu.add(Menu.NONE,Menu.FIRST+5,4,"詳細")    .setIcon(android.R.drawable.ic_menu_info_details);        menu.add(Menu.NONE,Menu.FIRST+6,7,"發送")    .setIcon(android.R.drawable.ic_menu_send);        menu.add(Menu.NONE,Menu.FIRST+7,3,"編輯")    .setIcon(android.R.drawable.ic_menu_edit);        return true;        }    @Override    public boolean onOptionsItemSelected(MenuItem item){    switch(item.getItemId()){    case Menu.FIRST+1:    Toast.makeText(this, "delete", Toast.LENGTH_LONG).show();    break;        case Menu.FIRST+2:    Toast.makeText(this, "save", Toast.LENGTH_LONG).show();    break;        case Menu.FIRST+3:    Toast.makeText(this, "help", Toast.LENGTH_LONG).show();    break;        case Menu.FIRST+4:    Toast.makeText(this, "add", Toast.LENGTH_LONG).show();    break;        case Menu.FIRST+5:    Toast.makeText(this, "detail", Toast.LENGTH_LONG).show();    break;        case Menu.FIRST+6:    Toast.makeText(this, "send", Toast.LENGTH_LONG).show();    break;        case Menu.FIRST+7:    Toast.makeText(this, "set", Toast.LENGTH_LONG).show();    break;    }    return false;    }    @Override    public void onOptionsMenuClosed(Menu menu){    Toast.makeText(this, "選項菜單關閉", Toast.LENGTH_LONG).show();    }    @Override    public boolean onPrepareOptionsMenu(Menu menu){    Toast.makeText(this, "在菜單顯示(onCreateOptionsMenu()方法)之前會調用此操作，可以" +    "在此操作之中完成一些預先處理操作", Toast.LENGTH_LONG).show();    return true;    }}

　　效果如：

android之OptionsMenu