重写接口
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
package com.example.androidtest;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.CompoundButton;
import android.widget.CheckBox;
import android.util.Log;
public class MainActivity extends Activity implements CompoundButton.OnCheckedChangeListener {
CheckBox cb;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cb = (CheckBox)findViewById(R.id.check);
cb.setOnCheckedChangeListener(this);
}
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if (isChecked) {
cb.setText("This checkbox is: checked");
} else {
cb.setText("This checkbox is: unchecked");
}
}
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<CheckBox xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/check"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This checkbox is: unchecked" />
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