android radioButton显示不出

[阿米尔]

RadioActivity

package archie.android.activity;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

public class RadioActivity extends Activity {

	/**
	 * 创建TextView对象
	 * 创建RadioGroup对象
	 * 创建4个RadioButton对象
	 */
	TextView		m_TextView;
	RadioGroup		m_RadioGroup;
	RadioButton		m_Radio1, m_Radio2, m_Radio3, m_Radio4;


	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.radio);

		/**
		 * 获得TextView对象
		 * 获得RadioGroup对象
		 * 获得4个RadioButton对象
		 */
		m_TextView = (TextView) findViewById(R.id.TextView01);
		m_RadioGroup = (RadioGroup) findViewById(R.id.RadioGroup01);
		m_Radio1 = (RadioButton) findViewById(R.id.RadioButton1);
		m_Radio2 = (RadioButton) findViewById(R.id.RadioButton2);
		m_Radio3 = (RadioButton) findViewById(R.id.RadioButton3);
		m_Radio4 = (RadioButton) findViewById(R.id.RadioButton4);

		/* 设置事件监听  */
		m_RadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
			@Override
			public void onCheckedChanged(RadioGroup group, int checkedId)
			{
				// TODO Auto-generated method stub
				if (checkedId == m_Radio2.getId())
				{
					DisplayToast("正确答案：" + m_Radio2.getText() + "，恭喜你，回答正确！");
				}
				else
				{
					DisplayToast("请注意，回答错误！");
				}
			}
		});
	}
	
	/* 显示Toast  */
	public void DisplayToast(String str)
	{
		Toast toast = Toast.makeText(this, str, Toast.LENGTH_LONG);
		//设置toast显示的位置
		toast.setGravity(Gravity.TOP, 0, 220);
		//显示该Toast
		toast.show();
	}
	
}

radio.xml

package archie.android.activity;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

public class RadioActivity extends Activity {

	/**
	 * 创建TextView对象
	 * 创建RadioGroup对象
	 * 创建4个RadioButton对象
	 */
	TextView		m_TextView;
	RadioGroup		m_RadioGroup;
	RadioButton		m_Radio1, m_Radio2, m_Radio3, m_Radio4;


	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.radio);

		/**
		 * 获得TextView对象
		 * 获得RadioGroup对象
		 * 获得4个RadioButton对象
		 */
		m_TextView = (TextView) findViewById(R.id.TextView01);
		m_RadioGroup = (RadioGroup) findViewById(R.id.RadioGroup01);
		m_Radio1 = (RadioButton) findViewById(R.id.RadioButton1);
		m_Radio2 = (RadioButton) findViewById(R.id.RadioButton2);
		m_Radio3 = (RadioButton) findViewById(R.id.RadioButton3);
		m_Radio4 = (RadioButton) findViewById(R.id.RadioButton4);

		/* 设置事件监听  */
		m_RadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
			@Override
			public void onCheckedChanged(RadioGroup group, int checkedId)
			{
				// TODO Auto-generated method stub
				if (checkedId == m_Radio2.getId())
				{
					DisplayToast("正确答案：" + m_Radio2.getText() + "，恭喜你，回答正确！");
				}
				else
				{
					DisplayToast("请注意，回答错误！");
				}
			}
		});
	}
	
	/* 显示Toast  */
	public void DisplayToast(String str)
	{
		Toast toast = Toast.makeText(this, str, Toast.LENGTH_LONG);
		//设置toast显示的位置
		toast.setGravity(Gravity.TOP, 0, 220);
		//显示该Toast
		toast.show();
	}
	
}

String.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Android底层是基于什么操作系统？</string>
    <string name="app_name">Component</string>
    <string name="RadioButton1">Windows</string>
    <string name="RadioButton2">Linux</string>
    <string name="RadioButton3">Moc os</string>
    <string name="RadioButton4">Java</string>
</resources>

本人初学Android，这是书上的一个小程序，自己敲了一遍，发现RadioButton一直出现不了，一直查啊查，不知道错在哪了

最后实在没办法，把源码贴上去了，还是不能出现四个RadioButton


早晨打开eclipse发现出了这个错

[2010-09-25 07:49:25 - radio.xml]Unable to resolve drawable "@android:drawable/btn_radio_label_background" in attribute "background"
org.xmlpull.v1.XmlPullParserException: Binary XML file line #19: <item> tag requires a 'drawable' attribute or child tag defining a drawable
at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:165)

[阿米尔]

不好意思radio.xml贴错了

是这样的：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
	<TextView  
	android:id="@+id/TextView01"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
  <RadioGroup
    android:id="@+id/RadioGroup01"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:layout_x="3px"
    android:layout_y="54px" 
    >
    <RadioButton
      android:id="@+id/RadioButton1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/RadioButton1"
    />
    <RadioButton
      android:id="@+id/RadioButton2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/RadioButton2"
    />
    <RadioButton
      android:id="@+id/RadioButton3"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/RadioButton3"
    />
    <RadioButton
      android:id="@+id/RadioButton4"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/RadioButton4"
    />
    </RadioGroup>    
</LinearLayout>

[ameyume]

我试过了，楼主的代码没问题，可以显示出四个radiobutton来的。
重新建个工程试试吧。

[mawl2002]

恩，没问题，你先预览看看能显示否