안드로이드 개발 질문/답변
(글 수 45,052)
import java.io.OutputStream; import java.util.Stack;
import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.BitmapShader; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Rect; import android.graphics.Shader.TileMode; import android.util.Log; import android.view.MotionEvent; import android.view.View;
public class BestPaintBoard extends View {
/** * Undo data */ Stack undos = new Stack();
/** * Maximum Undos */ public static int maxUndos = 10;
/** * Changed flag */ public boolean changed = false; /** * Canvas instance */ Canvas mCanvas; /** * Bitmap for double buffering */ Bitmap mBitmap; /** * Paint instance */ final Paint mPaint; /** * X coordinate */ float lastX; /** * Y coordinate */ float lastY;
private final Path mPath = new Path();
private float mCurveEndX;
private float mCurveEndY;
private int mInvalidateExtraBorder = 10;
static final float TOUCH_TOLERANCE = 8;
private static final boolean RENDERING_ANTIALIAS = true;
private static final boolean DITHER_FLAG = true;
private int mCertainColor = 0xFF000000;
private float mStrokeWidth = 2.0f;
/**
* Initialize paint object and coordinates
*
* @param c
*/
public BestPaintBoard(Context context) {
super(context);
// create a new paint object
mPaint = new Paint();
mPaint.setAntiAlias(RENDERING_ANTIALIAS);
mPaint.setColor(mCertainColor);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(mStrokeWidth);
mPaint.setDither(DITHER_FLAG);
lastX = -1; lastY = -1;
Log.i("GoodPaintBoard", "initialized.");
}
/**
* Clear undo
*/
public void clearUndo()
{
while(true) {
Bitmap prev = (Bitmap)undos.pop();
if (prev == null) return;
prev.recycle();
}
}
/**
* Save undo
*/
public void saveUndo()
{
if (mBitmap == null) return;
while (undos.size() >= maxUndos){
Bitmap i = (Bitmap)undos.get(undos.size()-1);
i.recycle();
undos.remove(i);
}
Bitmap img = Bitmap.createBitmap(mBitmap.getWidth(), mBitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas();
canvas.setBitmap(img);
canvas.drawBitmap(mBitmap, 0, 0, mPaint);
undos.push(img);
Log.i("GoodPaintBoard", "saveUndo() called.");
}
/**
* Undo
*/
public void undo()
{
Bitmap prev = null;
try {
prev = (Bitmap)undos.pop();
} catch(Exception ex) {
Log.e("GoodPaintBoard", "Exception : " + ex.getMessage());
}
if (prev != null){
drawBackground(mCanvas);
mCanvas.drawBitmap(prev, 0, 0, mPaint);
invalidate();
prev.recycle();
}
Log.i("GoodPaintBoard", "undo() called.");
}
/**
* Paint background
*
* @param g
* @param w
* @param h
*/
public void drawBackground(Canvas canvas)
{
if (canvas != null) {
canvas.drawColor(Color.WHITE);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.asd);
Paint Pnt = new Paint();
Pnt.setShader(new BitmapShader(bitmap, TileMode.REPEAT, TileMode.REPEAT));
canvas.drawBitmap(bitmap, 0, 0, null);
}
}
/**
* Update paint properties
*
* @param canvas
*/
public void updatePaintProperty(int color, int size)
{
mPaint.setColor(color);
mPaint.setStrokeWidth(size);
}
/**
* Create a new image
*/
public void newImage(int width, int height)
{
Bitmap img = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas();
canvas.setBitmap(img);
mBitmap = img;
mCanvas = canvas;
drawBackground(mCanvas);
changed = false;
invalidate();
}
/**
* Set image
*
* @param newImage
*/
public void setImage(Bitmap newImage)
{
changed = false;
setImageSize(newImage.getWidth(),newImage.getHeight(),newImage);
invalidate();
}
/**
* Set image size
*
* @param width
* @param height
* @param newImage
*/
public void setImageSize(int width, int height, Bitmap newImage)
{
if (mBitmap != null){
if (width < mBitmap.getWidth()) width = mBitmap.getWidth();
if (height < mBitmap.getHeight()) height = mBitmap.getHeight();
}
if (width < 1 || height < 1) return;
Bitmap img = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas();
drawBackground(canvas);
if (newImage != null) {
canvas.setBitmap(newImage);
}
if (mBitmap != null) {
mBitmap.recycle();
mCanvas.restore();
}
mBitmap = img;
mCanvas = canvas;
clearUndo();
}
/**
* onSizeChanged
*/
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
if (w > 0 && h > 0) {
newImage(w, h);
}
}
/**
* Draw the bitmap
*/
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mBitmap != null) {
canvas.drawBitmap(mBitmap, 0, 0, null);
}
}
/**
* Handles touch event, UP, DOWN and MOVE
*/
public boolean onTouchEvent(MotionEvent event) {
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_UP:
changed = true;
Rect rect = touchUp(event, false);
if (rect != null) {
invalidate(rect);
}
mPath.rewind();
return true;
case MotionEvent.ACTION_DOWN:
saveUndo();
rect = touchDown(event);
if (rect != null) {
invalidate(rect);
}
return true;
case MotionEvent.ACTION_MOVE:
rect = touchMove(event);
if (rect != null) {
invalidate(rect);
}
return true; }
return false; }
/**
* Process event for touch down
*
* @param event
* @return
*/
private Rect touchDown(MotionEvent event) {
float x = event.getX();
float y = event.getY();
lastX = x;
lastY = y;
Rect mInvalidRect = new Rect();
mPath.moveTo(x, y);
final int border = mInvalidateExtraBorder;
mInvalidRect.set((int) x - border, (int) y - border, (int) x + border, (int) y + border);
mCurveEndX = x;
mCurveEndY = y;
mCanvas.drawPath(mPath, mPaint);
return mInvalidRect;
}
/**
* Process event for touch move
*
* @param event
* @return
*/
private Rect touchMove(MotionEvent event) {
Rect rect = processMove(event);
return rect;
}
private Rect touchUp(MotionEvent event, boolean cancel) {
Rect rect = processMove(event);
return rect;
}
/**
* Process Move Coordinates
*
* @param x
* @param y
* @param dx
* @param dy
* @return
*/
private Rect processMove(MotionEvent event) {
final float x = event.getX();
final float y = event.getY();
final float dx = Math.abs(x - lastX);
final float dy = Math.abs(y - lastY);
Rect mInvalidRect = new Rect();
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
final int border = mInvalidateExtraBorder;
mInvalidRect.set((int) mCurveEndX - border, (int) mCurveEndY - border,
(int) mCurveEndX + border, (int) mCurveEndY + border);
float cX = mCurveEndX = (x + lastX) / 2;
float cY = mCurveEndY = (y + lastY) / 2;
mPath.quadTo(lastX, lastY, cX, cY);
// union with the control point of the new curve
mInvalidRect.union((int) lastX - border, (int) lastY - border,
(int) lastX + border, (int) lastY + border);
// union with the end point of the new curve
mInvalidRect.union((int) cX - border, (int) cY - border,
(int) cX + border, (int) cY + border);
lastX = x;
lastY = y;
mCanvas.drawPath(mPath, mPaint);
}
return mInvalidRect;
}
/**
* Save this contents into a Jpeg image
*
* @param outstream
* @return
*/
public boolean Save(OutputStream outstream) {
try {
mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, outstream);
invalidate();
return true;
} catch (Exception e) {
return false;
}
}
}
캔버스예제인대
이예제에서
어디선가에서 이미지를 잘라서보여주더라구요
그러니까..
머리 가슴 배 개미 전체의 이미지가있는대
이예제로 실행시키면 가슴만 보여주고있더라구요 ㄷㄷ
근대 그곳을 찾질못하겠네요 ㅠㅠ
어느부분인지 부탁좀드리겠습니다 ㅠㅠ
http://xiangxiang.tistory.com/entry/%EC%95%88%EB%93%9C%EB%A1%9C%EC%9D%B4%EB%93%9C-Bitmap-Bitmap-%EC%B6%95%EC%86%8C%EC%8B%9C%ED%82%A4%EA%B8%B0
해결했습니다