小编use*_*022的帖子

package com.example.hello.word;

import android.R;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ToggleButton;

public class OptionsMenu extends Activity{

    MediaPlayer ourSong;
    Button btn1;
    Intent openStartingPoint;

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

        final ToggleButton onTog = (ToggleButton) findViewById(R.id.toggleButton1);
        onTog.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                if (onTog.isChecked()){
                    ourSong.start();
                }else{
                    ourSong.stop();
                }
            }
        });

我在所有按钮下都有一个错误,它显示我的例子:"menuoptions无法解析或不是字段".. togglebutton1上的相同错误

我的XML文件:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" …