PuzzleActivity.java

package hj2.puzzle.begin;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class PuzzleActivity extends Activity {
    /** 주석이니까 욕이나 써놀까 */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        (Button) findViewById(R.id.bt1)}.setOnClickListener(on_Start); << 이줄에서 오류가 납니다.
    }
   
    private View.OnClickListener on_Start = new View.OnClickListener() {
  
  @Override
  public void onClick(View v) {
   ((TextView) findViewById(R.id.text1)).setText("Hi");
  }
 };
}

main.xml

<?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"
    android:weightSum="1">
<TextView 
 android:id="@+id/text1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="SATEST"
    />
<Button android:text="Button" android:id="@+id/bt1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="0.07"></Button>
<LinearLayout android:layout_width="match_parent" android:id="@+id/linearLayout1" android:layout_height="wrap_content" android:orientation="vertical"></LinearLayout>
</LinearLayout>

고수분들 도와주세요