<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" android:orientation="vertical"> <TextView android:id="@+id/txt" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="您的性別為"/> <RadioGroup android:id="@+id/sex" android:layout_width="fill_parent" android:layout_height="wrap_content"> <RadioButton android:id="@+id/male" android:text="男"/> <RadioButton android:id="@+id/female" android:text="女"/> </RadioGroup> </LinearLayout> 

public classMainActivity extends Activity { private TextView txt=null; private RadioGroup sex=null; private RadioButton male=null; private RadioButton female=null; @Override protected voidonCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); this.txt=(TextView)super.findViewById(R.id.txt); this.sex=(RadioGroup)super.findViewById(R.id.sex); this.male=(RadioButton)super.findViewById(R.id.male); this.female=(RadioButton)super.findViewById(R.id.female); this.sex.setOnCheckedChangeListener(newOnCheckedChangeListenerImp()); } private classOnCheckedChangeListenerImp implementsOnCheckedChangeListener{ public voidonCheckedChanged(RadioGroup group, int checkedId){ String temp=null; if(MainActivity.this.male.getId()==checkedId){ temp="男"; } else if(MainActivity.this.female.getId()==checkedId){ temp="女"; } MainActivity.this.txt.setText("您的性別是"+temp); } }