MainActivity.java
package com.example.activity_07;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
public class MainActivity extends Activity {
private RadioGroup radioGroup = null;
private RadioButton female = null;
private RadioButton male = null;
private TextView myTextView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myTextView = (TextView)findViewById(R.id.textView1);
radioGroup = (RadioGroup)findViewById(R.id.radioGroup);
female = (RadioButton)findViewById(R.id.femaleButton);
male = (RadioButton)findViewById(R.id.maleButton);
this.radioGroup.setOnCheckedChangeListener(new myRadioGoupListner());
}
public class myRadioGoupListner implements android.widget.RadioGroup.OnCheckedChangeListener
{
@Override
public void onCheckedChanged(RadioGroup group, int checkedId)
{
if(female.getId()==checkedId)//========================checkedId======getCheckedRadioButtonId==这两个参数都可以是实现
{
myTextView.setText(R.string.female);
}
else if(male.getId()==radioGroup.getCheckedRadioButtonId())//====================================================
{
myTextView.setText(R.string.male);
}
else
{
finish();
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
main.xml
<RelativeLayout xmlns: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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<RadioGroup
android:id="@+id/radioGroup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RadioButton
android:id="@+id/femaleButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/radioGroup"
android:layout_below="@+id/radioGroup"
android:layout_marginTop="64dp"
android:text="@string/female" />
<RadioButton
android:id="@+id/maleButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/femaleButton"
android:layout_below="@+id/femaleButton"
android:text="@string/male" />
</RadioGroup>
</RelativeLayout>