Question

安卓，button控件 onclicklistener代码错误

代码如下：
package com.ctt.button.activity;

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

public class MainActivity extends Activity {
private Button btn1=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1=(Button)findViewById(R.id.btn1);
btn1.setOnClickListener(new onClickListener(){
public void onClick(View v){
Toast.makeText(MainActivity.this, "你点击了按钮", Toast.LENGTH_LONG).show();
}
});
}
}

btn1.setOnClickListener(new onClickListener(){有错误
错误是：
Multiple markers at this line
- Line breakpoint:MainActivity [line: 18] - onCreate(Bundle)
- The method setOnClickListener(View.OnClickListener) in the type View is not applicable for the
arguments (new onClickListener(){})
求大神解答，因为运行不起，就没法进行接下来的学习，急急急！！

Answer 1

btn1.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub

}
});
new OnClickListener() 的 OnClickListener 大写

追问

你是说全大写吗

追答

O大写就行，按我上面写的一样