Android按键学习：RadioButton
源程序来自网络，做了简单的美化和修改。
HelloActivity.java
<span style="font-size:18px;">package sg131971.hello;
import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;
import android.widget.RadioGroup.OnCheckedChangeListener;
public class HelloActivity extends Activity {
/** Called when the activity is first created. */
protected RadioGroup group;
protected RadioButton radio1,radio2,radio3,radio4;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
group = (RadioGroup)findViewById(R.id.radiogroup);
radio1 = (RadioButton)findViewById(R.id.button1);
radio2 = (RadioButton)findViewById(R.id.button2);
radio3 = (RadioButton)findViewById(R.id.button3);
radio4 = (RadioButton)findViewById(R.id.button4);
group.setOnCheckedChangeListener(new AnswerListener() );
}
class AnswerListener implements OnCheckedChangeListener {
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
if (checkedId == radio2.getId())
{
showMessage("正确答案：" + radio2.getText()+".恭喜你，答对了!");
}
else if(checkedId == radio1.getId())
{
showMessage("对不起!" + radio1.getText()+"虽然很多,但不是公认的最多!");
}
else if(checkedId == radio3.getId())
{
showMessage("对不起!" + radio3.getText()+"虽然很多,但不是公认的最多!");
}
else
{
showMessage("对不起!" + radio4.getText()+"虽然很多,但不是公认的最多!");
}
}
}
public void showMessage(String str)
{
Toast toast = Toast.makeText(this, str, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.TOP, 0, 420);
toast.show();
}
}</span>
main.xml
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/bg1"
>
<TextView android:text="哪个城市的美女最多？" android:textSize="30px" android:layout_height="wrap_content" android:id="@+id/mytextview" android:layout_width="fill_parent" android:textColor="#FF0000" android:layout_x="0dp" android:layout_y="80dp"></TextView>
<RadioGroup android:orientation="vertical" android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/radiogroup" android:layout_x="0dp" android:layout_y="140dp">
<RadioButton android:layout_height="wrap_content" android:text="杭州" android:layout_width="wrap_content" android:id="@+id/button1"></RadioButton>
<RadioButton android:layout_height="wrap_content" android:text="重庆" android:layout_width="wrap_content" android:id="@+id/button2"></RadioButton>
<RadioButton android:layout_height="wrap_content" android:text="成都" android:layout_width="wrap_content" android:id="@+id/button3"></RadioButton>
<RadioButton android:layout_height="wrap_content" android:text="香港" android:layout_width="wrap_content" android:id="@+id/button4"></RadioButton>
</RadioGroup>
</AbsoluteLayout>
</span>
运行效果图：
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补充：移动开发 , Android ,
