Android選項菜單不起作用

Question

如問題所述，它不起作用。當我按菜單按鈕時，什麼都沒有出來。

這是菜單活動：

public class AndroidMenuActivity extends Activity{ 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.viewphoto); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // TODO Auto-generated method stub 
    super.onCreateOptionsMenu(menu); 
    MenuInflater menuInflater = getMenuInflater(); 
    menuInflater.inflate(R.menu.menu, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // TODO Auto-generated method stub 
    switch(item.getItemId()){ 
     case R.id.edit: 
      Toast.makeText(getApplicationContext(), "edit selected", Toast.LENGTH_SHORT).show(); 
      Intent i = new Intent(getApplicationContext(), PhotoFlashActivity.class); 
      startActivity(i); 
      return true; 
     default: 
      return super.onOptionsItemSelected(item); 
    } 
} 
} 

和一個非常小的menu.xml文件

<menu xmlns:android="http://schemas.android.com/apk/res/android" > 
<item 
    android:id="@+id/edit" 
    android:title="Edit"/> 

</menu> 

我不知道什麼是錯的，我已經看了教程沒提到將活動添加到清單文件中，所以我不確定是否必須這樣做。甚至當我做到這一點時也不起作用。我試過清理這個項目，但那也不管用。

Answer 1

這可能不是什麼，但是如果你重寫onCreateOptionsMenu（...）恰好是這樣的：

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // TODO Auto-generated method stub 

    MenuInflater menuInflater = getMenuInflater(); 
    menuInflater.inflate(R.menu.menu, menu); 
    return super.onCreateOptionsMenu(menu); 
} 

Answer 2

改變你這樣的代碼和chaeck。

 @Override 
public boolean onCreateOptionsMenu(Menu menu) { 
// TODO Auto-generated method stub 
super.onCreateOptionsMenu(menu); 
MenuInflater menuInflater = getMenuInflater(); 
menuInflater.inflate(R.menu.menu, menu); 
return true; 
} 

public boolean onContextItemSelected(MenuItem item) {  
    onOptionsItemSelected(item); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
// TODO Auto-generated method stub 
    switch(item.getItemId()){ 
    case R.id.edit: 
     Toast.makeText(getApplicationContext(), "edit selected", Toast.LENGTH_SHORT).show(); 
     Intent i = new Intent(getApplicationContext(), PhotoFlashActivity.class); 
     startActivity(i); 
     return true; 
     default: 
     return super.onOptionsItemSelected(item); 
    } 
} 
} 

Answer 3

public boolean onCreateOptionsMenu(Menu menu) { 

     MenuInflater inflater = getMenuInflater(); 
     inflater.inflate(R.menu.activity_custom__list_view, menu); 
     return true; 
    } 


    public boolean onOptionsItemSelected(MenuItem item) { 


       ....code...... 

      return super.onOptionsItemSelected(item); 
    } 

Answer 4

試試這個代碼，其works我完美。

main.class

public class OptionmenuActivity extends Activity { 
/** Called when the activity is first created. */ 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
} 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 


    MenuInflater inflater=getMenuInflater(); 
    inflater.inflate(R.menu.menu, menu); 
    //return super.onCreateOptionsMenu(menu); 

    menu.add("hello").setIcon(R.drawable.ic_launcher); 
    menu.add("patel").setIcon(R.drawable.ic_launcher); 
    menu.add("abc").setIcon(R.drawable.ic_launcher); 
    menu.add("hello").setIcon(R.drawable.ic_launcher); 
    menu.add("").setIcon(R.drawable.ic_launcher); 
    menu.add("").setIcon(R.drawable.ic_launcher); 

    return super.onCreateOptionsMenu(menu); 
} 
@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    switch(item.getItemId()) 
    { 
    case R.id.feeds: 
     Toast msg = Toast.makeText(OptionmenuActivity.this, "feeds", Toast.LENGTH_LONG); 
     msg.show(); 
     return true; 

    case R.id.friends: 
     Toast msg1 = Toast.makeText(OptionmenuActivity.this, "friends", Toast.LENGTH_LONG); 
     msg1.show(); 
     return true; 
    case R.id.about: 
     Toast msg2 = Toast.makeText(OptionmenuActivity.this, "about", Toast.LENGTH_LONG); 
     msg2.show(); 
     return true; 

    case 2: 

     Toast msg3 = Toast.makeText(OptionmenuActivity.this, "Menu 1", Toast.LENGTH_LONG); 
      msg3.show(); 
      return true; 

    } 
    return true; 
} 
} 

創建menu文件夾放到res文件夾中創建menu.xmlmenu文件夾內之後。

menu.xml文件

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

<item 
    android:id="@+id/feeds" 
    android:title="Feeds" 
    android:icon="@drawable/ic_launcher"/> 

<item 
    android:id="@+id/friends" 
    android:title="Friends"/> 

<item 
    android:id="@+id/about" 
    android:title="About"/> 

Answer 5

@Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     super.onCreateOptionsMenu(menu);   
     menuInflater.inflate(R.menu.menu, menu); 
     menu.findItem(R.id.edit).setTitle("Edit"); 
} 

你也可以試試力：

menu.findItem(R.id.edit).setVisible(true); 

然後...

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    switch(item.getItemId()){ 
     case R.id.edit: 
      //DO SOMETHING 
      return true; 
      default: 
       return super.onOptionsItemSelected(item); 
     } 
    } 

OR .... 您可以創建基於Java的菜單：

private static final int MENU_EDIT = 1;  
MenuItem itemconfig = menu.add(0, MENU_EDIT , 0, "Edit"); 
      itemconfig.setIcon(android.R.drawable.ic_menu_edit); 
      itemconfig.setShowAsAction(2); 

和onOptionsItemSelected：

case: MENU_EDIT 
    //DO SOMETHING 
    return true;