안녕하세요.


나 홀로 안드로이드를 공부하고 있습니다.


보시기 편하게 불필요한 소스는 삭제했습니다.     


코드해드라이터로 하려고 했는데, 크롬에서는 안되서.... 그냥 말았습니다. 그냥 봐주세용.


자세한 소개는 각설하고 본론으로 들어가서


FrameTest.java

public class FrameTest extends Activity {

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);


        setContentView(new Main_Gallery(this));

    }

}


위 엑티비티에서 갤러리 클래스를 호출해서 보여주려고 합니다.


Main_Gallery.java

public class Main_Gallery extends View  {

public Main_Gallery(Context context) {

super(context);

// TODO Auto-generated constructor stub

Gallery g = (Gallery) findViewById(R.id.gallery);

     

   g.setAdapter(new ImageAdapter(context));

     //이 부분에 에러가 나는 곳 입니다.

// 메인 엑티비티에서 this를 넘겨주고, ImageAdapter로 context를 넘겨주려고 하는데, 자꾸 에러가 나네요.

// 기초도 없고 책만 보고 하려니까 자꾸 막히네요.

// 안드로이드 박사님들 도와주세요~~!!!


 }




public class ImageAdapter extends BaseAdapter {

//     int mGalleryItemBackground;

     private Context mContext;



     private int mImageIds[] = new int[stage];

     

     public ImageAdapter(Context context) {


         mContext = context;


    }


     

     public int getCount() {


         return mImageIds.length;

     }


     public Object getItem(int position) {


         return position;

     }


     public long getItemId(int position) {


         return position;

     }


     public View getView(int position, View convertView, ViewGroup parent) {


     

         ImageView i = new ImageView(mContext);

         

         i.setImageResource(mImageIds[position]);

        

         i.setLayoutParams(new Gallery.LayoutParams(WindowWidth, WindowHeight/2));

        

         i.setScaleType(ImageView.ScaleType.CENTER_INSIDE);


         return i;

     }

 }

}



07-14 12:12:47.213: ERROR/show_Gallery(4183): Main_Gallery ImageAdapter() 07-14 12:12:47.223: ERROR/show_Gallery(4183): Main_Gallery init() 07-14 12:12:47.242: DEBUG/AndroidRuntime(4183): Shutting down VM 07-14 12:12:47.252: WARN/dalvikvm(4183): threadid=3: thread exiting with uncaught exception (group=0x4001b188) 07-14 12:12:47.252: ERROR/AndroidRuntime(4183): Uncaught handler: thread main exiting due to uncaught exception 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ssamkj.frametest/com.ssamkj.frametest.FrameTest}: java.lang.NullPointerException 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at android.os.Handler.dispatchMessage(Handler.java:99) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at android.os.Looper.loop(Looper.java:123) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at android.app.ActivityThread.main(ActivityThread.java:4363) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at java.lang.reflect.Method.invokeNative(Native Method) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at java.lang.reflect.Method.invoke(Method.java:521) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at dalvik.system.NativeStart.main(Native Method) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): Caused by: java.lang.NullPointerException 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at com.ssamkj.frametest.Main_Gallery.<init>(Main_Gallery.java:41) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at com.ssamkj.frametest.FrameTest.onCreate(FrameTest.java:24) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459) 07-14 12:12:47.282: ERROR/AndroidRuntime(4183): ... 11 more


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