roulette(룰렛)

ㅇ RouletteActivity.java

public class RouletteActivity extends AppCompatActivity {

    private ImageView mImageView;
    private Button rotate;

    private Bitmap mBitmap;
    private float angle = 0.0f; // 초기 각도
    private final int IMG_DP = 300; // 이미지 DP

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_roulette);

        mImageView = findViewById(R.id.wheel);

        mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.roulette);
        mImageView.setImageBitmap(onResizeImage(mBitmap));

        rotate = findViewById(R.id.rotate);
        rotate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onWheelImage();
            }
        });

    }


    /**
     * from DP to Pixel
     * @param dp
     * @param context
     * @return
     */
    private static float convertDpToPixel(float dp, Context context){
        Resources resources = context.getResources();
        DisplayMetrics metrics = resources.getDisplayMetrics();
        float px = dp * (metrics.densityDpi/160f);
        return px;
    }


    /**
     * image resizing
     * @param bitmap
     * @return
     */
    private Bitmap onResizeImage(Bitmap bitmap){
        int height = bitmap.getHeight();
        int width  = bitmap.getWidth();

        Float size = convertDpToPixel(IMG_DP, this);

        Bitmap resized = null;
        while(height > size.intValue()){
            resized = Bitmap.createScaledBitmap(bitmap, (width*size.intValue())/height, size.intValue(), true);
            height  = resized.getHeight();
            width   = resized.getWidth();
        }
       return resized;
    }

    private int getRandom(int max){
        return (int) (Math.random()*max);
    }

    private void onWheelImage(){
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                int random = getRandom(360);
                float fromAngle = random+720+angle; // 회전수 제어(랜덤(0~360)+720도+회전각)
                // 로테이션 애니메이션 초기화
                // 시작각, 종료각, 자기 원을 그리며 회전 옵
                RotateAnimation animation = new RotateAnimation(angle, fromAngle
                                , Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);

                getTargetEvent(fromAngle);

                // 초기 시작각도 업데이트
                angle = fromAngle;
                animation.setDuration(2000); // 지속시간이 길수록 느려짐
                animation.setFillEnabled(true); // 애니메이션 종료된 후 상태 고정 옵션
                animation.setFillAfter(true);
                mImageView.startAnimation(animation);
            }
        });
    }

private void getTargetEvent(float value){
    if((value>=1051 && value<=1080) || (value>=720 && value<=750)){
        Toast.makeText(getApplicationContext(), "콤보 할인 !!!!", Toast.LENGTH_SHORT).show();
    }else if(value>=991 && value<=1050){
        Toast.makeText(getApplicationContext(), "팝콘 교환 !!!!", Toast.LENGTH_SHORT).show();
    }else if(value>=931 && value<=990){
        Toast.makeText(getApplicationContext(), "영화 할인 !!!!", Toast.LENGTH_SHORT).show();
    }else if(value>=871 && value<=930){
        Toast.makeText(getApplicationContext(), "꽝 !!!!", Toast.LENGTH_SHORT).show();
    }else if(value>=811 && value<=870){
        Toast.makeText(getApplicationContext(), "음료수 !!!!", Toast.LENGTH_SHORT).show();
    }else if(value>=751 && value<=810){
        Toast.makeText(getApplicationContext(), "영화 !!!!", Toast.LENGTH_SHORT).show();
    }
}
}

ㅇ activity_roulette.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/point1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="V"
        android:gravity="center"/>
    <TextView
        android:id="@+id/point2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/point1"
        android:text="V"
        android:gravity="center"/>

    <ImageView
        android:id="@+id/wheel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:scaleType="matrix"
        android:layout_centerInParent="true"
        android:layout_below="@+id/point2"
        android:src="@drawable/roulette"/>

    <Button
        android:id="@+id/rotate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:text="start"/>

</RelativeLayout>