android单选按钮空值 Android的 - 空指针异常的对话与单选按钮

谁能帮我这个，告诉我，我做了错误...当我尝试用单选按钮的Eclipse做任何事情我抛出该异常Android的 - 空指针异常的对话与单选按钮

threadid=1: thread exiting with uncaught exception (group=0x40015560)

FATAL EXCEPTION: main

java.lang.NullPointerException

cz.nasdaq.RbtnActivity$1.onClick(RbtnActivity.java:36)

android.view.View.performClick(View.java:2485)

android.view.View$PerformClick.run(View.java:9080)

android.os.Handler.handleCallback(Handler.java:587)

android.os.Handler.dispatchMessage(Handler.java:92)

android.os.Looper.loop(Looper.java:123)

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与这个代码

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Button btn = (Button)findViewById(R.id.btn1);

btn.setOnClickListener(new OnClickListener() {

public void onClick(View arg0) {

final Dialog dialog = new Dialog(RbtnActivity.this);

dialog.setContentView(R.layout.dlg);

dialog.show();

RadioButton drb0=(RadioButton)findViewById(R.id.DialogRb0);

drb0.setChecked(true);

-04-20

nasdaq

+0

什么是第36行？ –

-04-20 16:41:35

+0

是主布局中的单选按钮？ –

-04-20 16:45:35