java - 按钮无法解决

Question

这是我的开始 Activity 。我试图让这个按钮工作，但它一直给我这个错误。

第 15 行按钮无法解析。

    package com.synamegames.giveaway;

import android.view.View.OnClickListener;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class GiveawayActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final Button register = (Button) findViewById(R.id.register);
        button.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                // Perform action on clicks

            }
        });
        setContentView(R.layout.main);
    }
}

Answer 1

请尝试这个..

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        final Button register = (Button) findViewById(R.id.register);
        register.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Perform action on clicks

            }
        });

    }