Develop
2013.04.23 16:50
[android] Canvas를 이용해 이미지 확대/축소 하기
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캔버스를 이용해 이미지 확대/축소하는 코드
import android.app.Activity; import android.content.Context; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Rect; import android.os.Bundle; import android.view.View; import android.view.Window; public class CanvasView extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(new ImageView(this)); } public class ImageView extends View{ private Bitmap image; // 이미지 public ImageView(Context context) { super(context); setBackgroundColor(Color.WHITE); // 그림 읽어들이기 Resources r = context.getResources(); image = BitmapFactory.decodeResource(r, R.drawable.excavator); } @Override protected void onDraw(Canvas canvas) { // 원본이미지 canvas.drawBitmap(image, 0, 0, null); // 원본이미지 영역을 축소해서 그리기 int w = image.getWidth(); int h = image.getHeight(); Rect src = new Rect(0, 0, w, h); Rect dst = new Rect(0, 200, w / 2, 200 + h / 2); canvas.drawBitmap(image, src, dst, null); super.onDraw(canvas); } } }
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