안드로이드 기본 엑티비티 코드

public class SampleActivity extends AppCompatActivity {
     private AsyncThread mAsyncThread;
 
     @BindView(R.id.root)
     LinearLayout root;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
         //팝업창 만들때!!
         //extends Activity
         //android:theme="@android:style/Theme.Translucent"
         supportRequestWindowFeature(Window.FEATURE_NO_TITLE);
 
         setContentView(R.layout.activity_room_list);
         ButterKnife.bind(this);
 
         //매니페스트에서 세로 고정하면 에러남.. 여기서 해줌
         try {
             setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
         } catch (Exception e) {
             e.printStackTrace();
         }
         //
 
         initView(root);
 
     }
 
     private void initView(View view) {
         SetViewScale setvs = new SetViewScale(this);
 
         if (view instanceof ViewGroup) {
             ViewGroup group = (ViewGroup) view;
             for (int i=0; i<group.getChildCount(); i++) {
                 View childView = group.getChildAt(i);
                 initView(childView);
             }
         } else {
             if (view.getLayoutParams().width > 0) {
                 setvs.setViewScale(view, view.getLayoutParams().width, view.getLayoutParams().height);
             }
         }
     }
 
     @Override
     public void onBackPressed() {
         finish();
         overridePendingTransition(0, 0);
 
     }
 
     @OnClick(R.id.btn_back)
         public void back() {
             onBackPressed();
         }
}