setOnCheckedChangeListener（this）错误

Question

我是android的初学者。 我读了一些书。我创建了复选框

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class MainActivity extends AppCompatActivity implements OnCheckedChangeListener {
CheckBox cb;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();

            cb = (CheckBox) findViewById(R.id.mycheckbox);
            cb.setOnCheckedChangeListener(this);
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    if (isChecked) {
        cb.setText("Checked");
    } else {
        cb.setText("UnCheck");
    }
}

}

使用cb.setOnCheckedChangeListener（this）时; android studio错误： CompoundButton中的setOnCheckedChangeListener（android.widget.CompoundButton.OnCheckedChangeListener）无法应用（匿名android.view.View.onClickListener）

如果我更改代码，例如：

cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        //do stuff

    }
});    

然后确定

你能帮我吗？我想使用＆＃34;这个＆＃34;。

Answer 1

使用MainActivity.this代替this：

 cb.setOnCheckedChangeListener(MainActivity.this);

因为在当前代码this中引用Button onClick方法上下文而不是实现MainActivity接口的OnCheckedChangeListener类。