소스입니다.
 package kp.apptime.school;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.Animation.AnimationListener;
import android.widget.Button;
public class Main extends Activity {
     Animation mAni;
      View.OnClickListener bHandler = new OnClickListener() {
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   switch (v.getId()) {
   case R.id.halbtn: {
    Button c1 = (Button) findViewById(R.id.halbtn);
    c1.setBackgroundResource(R.drawable.main_1);
    c1.startAnimation(mAni);
    mAni.setAnimationListener(new AnimationListener() {
     public void onAnimationEnd(Animation animation) {
      Intent intent1 = new Intent(Main.this,
        Halmal.class);
      startActivity(intent1);
     }
     public void onAnimationRepeat(Animation animation) {
      ;
     }
     public void onAnimationStart(Animation animation) {
      ;
     }
    });
   }
    break;
   case R.id.jilbtn: {
    Button c1 = (Button) findViewById(R.id.jilbtn);
    c1.setBackgroundResource(R.drawable.main_2);
    c1.startAnimation(mAni);
    mAni.setAnimationListener(new AnimationListener() {
     public void onAnimationEnd(Animation animation) {
      Intent intent2 = new Intent(Main.this,
        Jil.class);
      startActivity(intent2);
     }
     public void onAnimationRepeat(Animation animation) {
      ;
     }
     public void onAnimationStart(Animation animation) {
      ;
     }
    });
   }
    break;
   case R.id.sinbtn: {
    Button c1 = (Button) findViewById(R.id.sinbtn);
    c1.setBackgroundResource(R.drawable.main_3);
    c1.startAnimation(mAni);
    mAni.setAnimationListener(new AnimationListener() {
     public void onAnimationEnd(Animation animation) {
      Intent intent3 = new Intent(Main.this,
        Sin.class);
      startActivity(intent3);
     }
     public void onAnimationRepeat(Animation animation) {
      ;
     }
     public void onAnimationStart(Animation animation) {
      ;
     }
    });
   }
    break;
   case R.id.hwanbtn:
     {
     Button c1 = (Button)findViewById(R.id.hwanbtn);
     c1.setBackgroundResource(R.drawable.main_4);
     c1.startAnimation(mAni);
     mAni.setAnimationListener(new AnimationListener() {
     public void onAnimationEnd(Animation animation) {
    Intent intent4 = new Intent(Main.this,
      Hwan.class);
    startActivity(intent4);
     }
     public void onAnimationRepeat(Animation animation) {;}
     public void onAnimationStart(Animation animation) {;}
     });
     }
    break;
   }
  }
 };
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.main);
        
        findViewById(R.id.halbtn).setOnClickListener(bHandler);
        findViewById(R.id.jilbtn).setOnClickListener(bHandler);
        findViewById(R.id.sinbtn).setOnClickListener(bHandler);
        findViewById(R.id.hwanbtn).setOnClickListener(bHandler);
        findViewById(R.id.button1).setOnClickListener(bHandler);
        mAni = AnimationUtils.loadAnimation(this, R.anim.scale);
    }
}

로그켓 입니다

11-16 15:01:53.797: D/skia(9517): SHAPER: stream created /data/data/com.jungle.app.fonts/tmp/SJbangu.ttf.. 0x129E40
11-16 15:01:53.887: W/dalvikvm(9517): threadid=1: thread exiting with uncaught exception (group=0x40018560)
11-16 15:01:53.897: E/AndroidRuntime(9517): FATAL EXCEPTION: main
11-16 15:01:53.897: E/AndroidRuntime(9517): java.lang.RuntimeException: Unable to start activity ComponentInfo{kp.apptime.school/kp.apptime.school.Main}: java.lang.NullPointerException
11-16 15:01:53.897: E/AndroidRuntime(9517):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at android.os.Handler.dispatchMessage(Handler.java:99)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at android.os.Looper.loop(Looper.java:130)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at android.app.ActivityThread.main(ActivityThread.java:3683)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at java.lang.reflect.Method.invokeNative(Native Method)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at java.lang.reflect.Method.invoke(Method.java:507)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at dalvik.system.NativeStart.main(Native Method)
11-16 15:01:53.897: E/AndroidRuntime(9517): Caused by: java.lang.NullPointerException
11-16 15:01:53.897: E/AndroidRuntime(9517):  at kp.apptime.school.Main.onCreate(Main.java:121)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-16 15:01:53.897: E/AndroidRuntime(9517):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
11-16 15:01:53.897: E/AndroidRuntime(9517):  ... 11 more
 
메인에서 오류났다고하는대 오류난게없는대 ... 왜이럴까요 ㅠㅠㅠㅠ 진짜미치겠습니다 실장비로 테스트하고있으며
2.3입니다 ㅠㅠ
이 게시물을