菜单按钮不工作？

Question

我不确定我做错了什么。我正在研究6按钮菜单。按钮显示但不呼叫该活动，并且我看不到菜单按钮上显示的任何文本。他们出现空白，帮助请！

package com.cerealBarApps; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 

public class FirstLoginActivity extends Activity { 

    protected void onCreate(Bundle Ebenezersbundle) 

    { 
     super.onCreate(Ebenezersbundle); 
     setContentView(R.layout.testlayout); 
    } 

    public boolean onCreateOptionsMenu(Menu menu) { 
     super.onCreateOptionsMenu(menu); 
     MenuInflater awesome = getMenuInflater(); 
     awesome.inflate(R.menu.main_menu, menu); 
     return true; 
    } 

    /* 
    * Intent nextScreen = new Intent(getApplicationContext(), 
    * AllFaculty.class); // Sending data to another Activity 
    * startActivity(nextScreen); 
    */ 
    public boolean onOptionsItemSelected(MenuItem item) { 
     switch (item.getItemId()) { 
     case 1: 
      Intent intent1 = new Intent(this, SMS.class); 
      startActivity(intent1); 
      break; 
     case 2: 
      Intent intent2 = new Intent(this, MenuRecieved.class); 
      startActivity(intent2); 
      break; 
     case 3: 
      Intent intent3 = new Intent(this, MenuSent.class); 
      startActivity(intent3); 
     case 4: 
      Intent intent4 = new Intent(this, MenuSettings.class); 
      startActivity(intent4); 
     case 5: 
      Intent intent5 = new Intent(this, MenuExit.class); 
      startActivity(intent5); 

     default: 
      break; 
     } 
     return super.onOptionsItemSelected(item); 
    } 
} 

菜单XML：

<?xml version="1.0" encoding="UTF-8"?> 
<menu xmlns:android="xmlns:android= http:/schemas.android.com/apk/res/android" > 

    <item 
     android:id="@+id/menuMenu" 
     android:alphabeticShortcut="m" 
     android:title="MenuTest"/> 
    <item 
     android:id="@+id/menuNewMessage" 
     android:alphabeticShortcut="n" 
     android:title="New Message"/> 

    <item 
     android:id="@+id/menuSent" 
     android:alphabeticShortcut="s" 
     android:title="Sent"/> 

    <item 
     android:id="@+id/menuRecieved" 
     android:alphabeticShortcut="r" 
     android:title="Recieved"/> 

    <item 
     android:id="@+id/menuSettings" 
     android:alphabeticShortcut="s" 
     android:title="Settings"/> 

    <item 
     android:id="@+id/menuExit" 
     android:alphabeticShortcut="e" 
     android:title="Exit"/> 

</menu 

代码：

public boolean onOptionsItemSelected(MenuItem item) { 
     switch (item.getItemId()) { 
     case R.id.menuNewMessage: 
      startActivity(new Intent(getApplicationContext(), SMS.class)); 
      return true; 
     case R.id.menuSent: 
      startActivity(new Intent("com.cerealBarApps")); 
      return true; 
     case R.id.menuRecieved: 
      startActivity(new Intent("com.cerealBarApps")); 
      return true; 
     case R.id.menuSettings: 
      startActivity(new Intent("com.cerealBarApps")); 
      return true; 
     case R.id.menuExit: 
      startActivity(new Intent("com.cerealBarApps")); 
      return true; 
     } 
     return false; 
    } 
} 

Answer 1

嗨我理解了它，那是因为我没有做一个onCreateOptionsMenu方法。感谢gusy的帮助

public boolean onCreateOptionsMenu(Menu menu) { 
      menu.add(0, menuNewMessage, 0, "New Message"); 
      menu.add(0, menuSent, 0, "Outbox"); 
      menu.add(0, menuRecieved, 0, "Inbox"); 
      menu.add(0, menuSettings, 0, "Settings"); 
      menu.add(0, menuExit, 0, "Exit"); 
      return super.onCreateOptionsMenu(menu); 
     } 

     public boolean onOptionsItemSelected(MenuItem item) { 
      switch (item.getItemId()) { 
      case menuNewMessage: 
       startActivity(new Intent(getApplicationContext(), SMS.class)); 
       break; 
      case menuSent: 
       startActivity(new Intent(getApplicationContext(), MenuSent.class)); 
       break; 
      case menuRecieved: 
       startActivity(new Intent(getApplicationContext(), 
         MenuRecieved.class)); 
       break; 
      case menuSettings: 
       startActivity(new Intent(getApplicationContext(), 
         MenuSettings.class)); 
       break; 
      case menuExit: 
       startActivity(new Intent(getApplicationContext(), MenuExit.class)); 
       break; 
      } 
      return super.onOptionsItemSelected(item); 
     } 
    } 

Answer 2

删除return false，取而代之的是：

return super.onOptionsItemSelected(menuItem); 

遵循下面的代码

@Override 
public boolean onOptionsItemSelected(MenuItem menuItem) 
{ 
    switch (menuItem.getItemId()) 
    { 
    case 0: 
     this.SaveData(); 
     break;   
     case 1: 
     Intent intent2 = new Intent(DryWall.this,Help.class); 
     startActivity(intent2); 
     break; 
    default: 
     break; 
    }  
    return super.onOptionsItemSelected(menuItem); 
}