Question

Android Studio设置onClickListener()提示Cannot solve symbol ''

代码如下

package prave.com.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
private Button b1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b1=(Button)findViewById(R.id.b1);
b1.setOnClickListener(new OnClickListener() {
//todo
}
);
}
}

Answer 1

b1.setOnClickListener(new OnClickListener() {
//todo
@override
onClick(View v) {
}
}