Question

我正在尝试创建一个包含两个项目'help'和'about'的菜单。我写了代码。它没有错误，但代码不起作用。我还在清单文件中添加了活动。这是我的AndroidMenusActivity代码：

package com.easy.convert;

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

public class AndroidMenusActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

// Initiating Menu XML file (menu.xml)
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
    MenuInflater menuInflater = getMenuInflater();
    menuInflater.inflate(R.layout.menu, menu);
    return true;
}

/**
 * Event Handling for Individual menu item selected
 * Identify single menu item by it's id
 * */
@Override
public boolean onOptionsItemSelected(MenuItem item)
{

    switch (item.getItemId())
    {
    case R.id.menu_help:
        Dialog dialog = new Dialog(this);
        dialog.setContentView(R.layout.aboutus);
        dialog.setTitle("Help");
        dialog.setCancelable(true);
        dialog.show();
        return true;

    case R.id.menu_about:
        Dialog dialog1 = new Dialog(this);
        dialog1.setContentView(R.layout.aboutus);
        dialog1.setTitle("About");
        dialog1.setCancelable(true);
        dialog1.show();
        return true;

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

menu.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/lib/com.easy.convert ">
<!-- Single menu item 
     Set id, icon and Title for each menu item
-->
<item android:id="@+id/menu_help"
      android:icon="@drawable/help"
      android:title="Help" />

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

</menu>

我希望每个活动都有菜单。

Answer 1

你的问题在这里：

// Initiating Menu XML file (menu.xml)
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
    MenuInflater menuInflater = getMenuInflater();
    menuInflater.inflate(R.layout.menu, menu);
    return true;
}

您可以在此处查看：Google Document

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.game_menu, menu);
    return true;
}

希望有所帮助！

Answer 2

试试这个：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/lib/com.easy.convert ">
<!-- Single menu item 
     Set id, icon and Title for each menu item
-->
<item android:id="@+id/menu_help"
      android:icon="@drawable/help"
      android:showAsAction="ifRoom"
      android:title="Help" />

<item android:id="@+id/menu_about"
      android:icon="@drawable/about"
      android:showAsAction="ifRoom"
      android:title="About" />

</menu>

Answer 3

将以下代码用于您的所有活动。

      @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        MenuInflater menuInflater = getMenuInflater();
        menuInflater.inflate(R.layout.menu, menu);
        return true;
    }

    /**
     * Event Handling for Individual menu item selected
     * Identify single menu item by it's id
     * */
    @Override
    public boolean onOptionsItemSelected(MenuItem item)
     {

    switch (item.getItemId())
    {
    case R.id.menu_help:
        Dialog dialog = new Dialog(this);
        dialog.setContentView(R.layout.aboutus);
        dialog.setTitle("Help");
        dialog.setCancelable(true);
        dialog.show();
        return true;

    case R.id.menu_about:
        Dialog dialog1 = new Dialog(this);
        dialog1.setContentView(R.layout.aboutus);
        dialog1.setTitle("About");
        dialog1.setCancelable(true);
        dialog1.show();
        return true;

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

android中的菜单不起作用

3 个答案: