android - onCreate() undefined object 类型和 token 类无效类型的语法错误

Question

我是安卓新手。我收到的错误是 method(onCreate) is undefined for the type of object and syntax error on token class invalid type.

package com.ling;

import android.app.Activity;
import android.os.Bundle;

public class Disp extends Activity{


    public class onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.display);
    }
}

Answer 1

改变

public class onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.display);
}

到

public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.display);
}

因为 onCreate 是方法而不是当前类，您正试图从 onCreate 方法返回类类型