andorid4.2编程activity的onclick函数总是报错

Question

main.xml文件内容:

<Button
    android:id="@+id/btn_dialog2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Click to display a progress dialog" 
    android:onClick="onClick"/>

MainActivity.java文件内容：
public void onclick(View v){
final ProgressDialog dialog=ProgressDialog.show(
this,"Doing something","Please wait...",true);

    new Thread(new Runnable(){
        public void run(){
        try{
            Thread.sleep(5000);
            dialog.dismiss();
        }
        catch (InterruptedException e){
            e.printStackTrace();
        }
        }
    }).start();
}

启动程序后，安卓模拟器界面显示了一个按钮，但是我一点击报错如下：
E/AndroidRuntime(1754): java.lang.IllegalStateException: Could not find a method onClick(View)
in the activity class com.godlovesoccer.progressdialog.MainActivity for onClick handler on view
class android.widget.Button with id 'btn_dialog2'

我用的是Eclipse luna版，然后sdk是android4.2，求高手赐教！谢谢了！要不然我这买的书没法学下去了

Answer 1

你的button按钮写了监听事件吗？