threadid = 1：线程退出时出现未捕获的异常

我有这个错误，我不明白发生了什么问题。我只是在Android开发初学者，所以我可能犯一个愚蠢的事情，但我不能找到它......threadid = 1：线程退出时出现未捕获的异常

这里是我的活动：

package pjl.appli; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.RadioButton; 
import android.widget.RadioGroup; 


public class SoundGenActivity extends Activity { 
    /** Called when the activity is first created. */ 


    RadioGroup radioGroup = new RadioGroup(this); 
    RadioButton fm = new RadioButton(this); 
    RadioButton granulaire = new RadioButton(this); 




    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     // On ajoute les boutons au RadioGroup 
     radioGroup.addView(fm, 0); 
     radioGroup.addView(granulaire, 1);  
    } 
}

这是我的主。 XML：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:baselineAligned="false" 
    android:orientation="horizontal" > 

    <RadioGroup 
     android:id="@+id/radioSyntheseSonore" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:orientation="horizontal" > 
     <RadioButton 
      android:id="@+id/fm" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/fm" 
      android:checked="true" /> 
     <RadioButton 
      android:id="@+id/granulaire" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/granulaire" /> 
    </RadioGroup> 

</LinearLayout>

这里是我的logcat：

 06-01 09:09:07.398: D/AndroidRuntime(800): Shutting down VM 
06-01 09:09:07.398: W/dalvikvm(800): threadid=1: thread exiting with uncaught exception (group=0x409c01f8) 
06-01 09:09:07.419: I/dalvikvm(800): threadid=3: reacting to signal 3 
06-01 09:09:07.498: I/dalvikvm(800): Wrote stack traces to '/data/anr/traces.txt' 
06-01 09:09:07.498: E/AndroidRuntime(800): FATAL EXCEPTION: main 
06-01 09:09:07.498: E/AndroidRuntime(800): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{pjl.appli/pjl.appli.SoundGenActivity}: java.lang.NullPointerException 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1880) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.app.ActivityThread.access$600(ActivityThread.java:123) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.os.Handler.dispatchMessage(Handler.java:99) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.os.Looper.loop(Looper.java:137) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.app.ActivityThread.main(ActivityThread.java:4424) 
06-01 09:09:07.498: E/AndroidRuntime(800): at java.lang.reflect.Method.invokeNative(Native Method) 
06-01 09:09:07.498: E/AndroidRuntime(800): at java.lang.reflect.Method.invoke(Method.java:511) 
06-01 09:09:07.498: E/AndroidRuntime(800): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
06-01 09:09:07.498: E/AndroidRuntime(800): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
06-01 09:09:07.498: E/AndroidRuntime(800): at dalvik.system.NativeStart.main(Native Method) 
06-01 09:09:07.498: E/AndroidRuntime(800): Caused by: java.lang.NullPointerException 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.content.ContextWrapper.getResources(ContextWrapper.java:81) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.view.View.<init>(View.java:2696) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.view.ViewGroup.<init>(ViewGroup.java:374) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.widget.LinearLayout.<init>(LinearLayout.java:166) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.widget.RadioGroup.<init>(RadioGroup.java:66) 
06-01 09:09:07.498: E/AndroidRuntime(800): at pjl.appli.SoundGenActivity.<init>(SoundGenActivity.java:13) 
06-01 09:09:07.498: E/AndroidRuntime(800): at java.lang.Class.newInstanceImpl(Native Method) 
06-01 09:09:07.498: E/AndroidRuntime(800): at java.lang.Class.newInstance(Class.java:1319) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.app.Instrumentation.newActivity(Instrumentation.java:1023) 
06-01 09:09:07.498: E/AndroidRuntime(800): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1871) 
06-01 09:09:07.498: E/AndroidRuntime(800): ... 11 more 
06-01 09:09:07.928: I/dalvikvm(800): threadid=3: reacting to signal 3 
06-01 09:09:07.978: I/dalvikvm(800): Wrote stack traces to '/data/anr/traces.txt' 
06-01 09:09:08.208: I/dalvikvm(800): threadid=3: reacting to signal 3 
06-01 09:09:08.248: I/dalvikvm(800): Wrote stack traces to '/data/anr/traces.txt' 
06-01 09:14:07.708: I/Process(800): Sending signal. PID: 800 SIG: 9

来源

2012-06-01 Camille Moufle

-1

您的收音机组似乎是问题的根源，请检查您的代码部分

您是否已将radiogrp=(RadioGroup)findviewbyid("id")添加到您的代码中？您需要在该视图上调用操作之前添加此项。

来源

2012-06-01 09:34:36

我遵循你的建议，但它仍然无法正常工作。在模拟器上打印任何东西之前应用程序会停止... –

您应该将此添加到onCreate方法 RadioGroup radioGroup = new RadioGroup（this）; RadioButton fm = new RadioButton（this）; RadioButton granulaire = new RadioButton（this）; –

尝试通过此示例布莱恩http://www.thetekblog.com/2010/07/android-radiobutton-in-radiogroup-example/ –

threadid = 1：线程退出时出现未捕获的异常

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