android之OptionsMenu

首先编写res/layout/Activity_main.xml

代码如下:

<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键出现选项菜单"/> </LinearLayout>

  然后编写Activity类相应的代码

代码如下:

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,"删除")
.setIcon(android.R.drawable.ic_menu_delete); menu.add(Menu.NONE,Menu.FIRST+2,2,"保存")
.setIcon(android.R.drawable.ic_menu_save); menu.add(Menu.NONE,Menu.FIRST+3,6,"帮助")
.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,"详细")
.setIcon(android.R.drawable.ic_menu_info_details); menu.add(Menu.NONE,Menu.FIRST+6,7,"发送")
.setIcon(android.R.drawable.ic_menu_send); menu.add(Menu.NONE,Menu.FIRST+7,3,"编辑")
.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, "选项菜单关闭", Toast.LENGTH_LONG).show();
}
@Override
public boolean onPrepareOptionsMenu(Menu menu){
Toast.makeText(this, "在菜单显示(onCreateOptionsMenu()方法)之前会调用此操作,可以" +
"在此操作之中完成一些预处理操作", Toast.LENGTH_LONG).show();
return true;
}
}

  效果如下图:

android之OptionsMenu

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