应用源码之(RadioButton与监听.zip

package com.himi.radiobutton; import android.app.Activity; import android.os.Bundle; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.Toast; import android.widget.RadioGroup.OnCheckedChangeListener; //使用状态改变监听器 public class MainActivity extends Activity implements OnCheckedChangeListener { private RadioButton rb1, rb2, rb3; private RadioGroup rg; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); rb1 = (RadioButton) findViewById(R.id.rb1); rb2 = (RadioButton) findViewById(R.id.rb2); rb3 = (RadioButton) findViewById(R.id.rb3); rg = (RadioGroup) findViewById(R.id.radGrp); rg.setOnCheckedChangeListener(this);//将单选组绑定监听器 } //重写监听器函数 /** * @param group：指单选组 * @param group：指单选组中发生状态改变的RadioButton的内存ID！ */ @Override public void onCheckedChanged(RadioGroup group, int checkedId) { if (group == rg) {//因为当前程序中只有一个RadioGroup，此步可以不进行判定 String rbName = null; if (checkedId == rb1.getId()) { rbName = rb1.getText().toString(); } else if (checkedId == rb2.getId()) { rbName = rb2.getText().toString(); } else if (checkedId == rb3.getId()) { rbName = rb3.getText().toString(); } Toast.makeText(this, "选择了下标为“" + rbName + "”的单选按钮", Toast.LENGTH_LONG).show(); } } }