04. 커스텀 뷰

※ 커스텀 뷰?

레이아웃 뷰 그룹을 이용하지 않고 View클래스를  상속 받아 직접 뷰를 만들어 사용하는 것

사진출처 : 서울위즈 앱 창업자를 위한 안드로이드 실무 동영상

커스텀뷰 예제 소스

public class MainActivity extends ActionBarActivity {

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              //setContentView(R.layout.activity_main);

              

                        //커스텀뷰를 객체로 만들어 setContentView에 넣어준다

              CustomView cv = new CustomView(MainActivity.this);

              

              setContentView(cv);

       }

       @Override

       public boolean onCreateOptionsMenu(Menu menu) {

              // Inflate the menu; this adds items to the action bar if it is present.

              getMenuInflater().inflate(R.menu.main, menu);

              return true;

       }

       @Override

       public boolean onOptionsItemSelected(MenuItem item) {

              // Handle action bar item clicks here. The action bar will

              // automatically handle clicks on the Home/Up button, so long

              // as you specify a parent activity in AndroidManifest.xml.

              int id = item.getItemId();

              if (id == R.id.action_settings) {

                     return true;

              }

              return super.onOptionsItemSelected(item);

       }

}

public class CustomView extends View {

       public CustomView(Context context) {

              super(context);

              // TODO Auto-generated constructor stub

       }

       

       @Override

       protected void onDraw(Canvas canvas) {

              // TODO Auto-generated method stub

              //super.onDraw(canvas);

              

              //배경색 넣기

              canvas.drawColor(Color.GREEN);

              

              //원 그러넣기

              Paint paint = new Paint();

              paint.setColor(Color.BLUE);

              canvas.drawCircle(100, 100, 50, paint);

              

              paint.setColor(Color.RED);

              canvas.drawCircle(200, 200, 70, paint);

              

              //이미지 넣기

              Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);

              canvas.drawBitmap(bitmap, 500, 500, null);

                           

       }

}