MainActivity继承Activity使用OnCheckedChangeListener接口:
package com.cdp.checkbox; import android.app.Activity; import android.os.Bundle; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.Toast; import android.widget.CompoundButton.OnCheckedChangeListener; //使用状态改变检查监听器 public class MainActivity extends Activity implements OnCheckedChangeListener { //创建3个CheckBox对象 private CheckBox cb1, cb2, cb3; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //实例化3个CheckBox cb1 = (CheckBox) findViewById(R.id.cb1); cb2 = (CheckBox) findViewById(R.id.cb2); cb3 = (CheckBox) findViewById(R.id.cb3); cb1.setOnCheckedChangeListener(this); cb2.setOnCheckedChangeListener(this); cb3.setOnCheckedChangeListener(this); } //重写监听器的抽象函数 @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { //buttonView 选中状态发生改变的那个按钮 //isChecked 表示按钮新的状态(true/false) if (cb1 == buttonView || cb2 == buttonView || cb3 == buttonView) { if (isChecked) { //显示一个提示信息 toastDisplay(buttonView.getText() + "选中"); } else { toastDisplay(buttonView.getText() + "取消选中"); } } } public void toastDisplay(String str) { Toast.makeText(this, str, Toast.LENGTH_SHORT).show(); } }
run:
时间: 2024-10-29 08:29:54