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POZoom and rotate image in android without using imageview
 

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  1. POZoom and rotate image in android without using imageview
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    <p>i am new to android and i want to <strong><em>zoom and rotate my image</em></strong> without using <code>Imageview</code> . i can drag the image. </p> <p>code:</p> <pre><code>public class SimpImageView extends BaseView{ private Bitmap image = null; private Paint borderPaint = null; PointF start = new PointF(); PointF lastPosition = new PointF(); private Matrix savedMatrix = new Matrix(); private Paint imagePaint = null; private Matrix matrix = new Matrix(); float initialRotation; float currentRotation; private float initialScale; private float currentScale; PointF mid = new PointF(); float oldDist = 1f; private Bitmap rotatedImage; public Bitmap getImage() { return image; } public void setImage(Bitmap image) { this.image = image; } public SimpImageView(Bitmap image,int x,int y,int width,int height){ super(x, y, width, height); this.image = image; imagePaint = new Paint(); imagePaint.setARGB(32, 255, 255, 255); imagePaint.setStyle(Paint.Style.FILL); } /* (non-Javadoc) * @see com.simplogics.surfaceview.Views.BaseView#onDraw(android.graphics.Canvas) */ @Override public void onDraw(Canvas canvas) { canvas.drawBitmap(getImage(), getBounds().left,getBounds().top, new Paint()); } /* (non-Javadoc) * @see com.simplogics.surfaceview.Views.BaseView#onTouchEvent(android.view.MotionEvent) */ static final int NONE = 0; static final int DRAG = 1; static final int ZOOM = 2; int mode = NONE; @Override public boolean onTouchEvent(MotionEvent event) { boolean handled = false; Log.d("SimpEditText", "(int)event.getX() " + (int)event.getX()); Log.d("SimpEditText", "(int)event.getY() " + (int)event.getY()); if(isTouchedInBounds((int)event.getX(), (int)event.getY())){ Log.d("SimpEditText", "Touched in Bounds"); handled = true; switch (event.getAction() &amp; MotionEvent.ACTION_MASK) { case MotionEvent.ACTION_DOWN: savedMatrix.set(matrix); start.set(event.getX(), event.getY()); lastPosition.x = getBounds().left; lastPosition.y = getBounds().top; Log.d("VerticalLabelView", "mode=DRAG"); mode = DRAG; break; case MotionEvent.ACTION_POINTER_DOWN: mode = ZOOM; initialScale = spacing(event); midPoint(mid, event); Log.d("VerticalLabelView", "mode=ZOOM"); currentRotation = rotation(event); break; case MotionEvent.ACTION_UP: mode = NONE; break; case MotionEvent.ACTION_POINTER_UP: mode = NONE; Log.d("VerticalLabelView", "mode=NONE"); break; case MotionEvent.ACTION_MOVE: if (mode == DRAG) { int x = (int)(event.getX() - start.x); int y = (int)(event.getY() - start.y); setPosition((int)lastPosition.x + x, (int)lastPosition.y + y); }else if(mode == ZOOM){ currentScale = spacing(event); float scale =currentScale/initialScale; this.image = rotatedImage; this.setScale(0, 0,(int) (getBounds().width()*scale),(int) (getBounds().height()*scale)); } break; } } return handled; } private float spacing(MotionEvent event) { float x = event.getX(0) - event.getX(1); float y = event.getY(0) - event.getY(1); return FloatMath.sqrt(x * x + y * y); } private void midPoint(PointF point, MotionEvent event) { float x = event.getX(0) + event.getX(1); float y = event.getY(0) + event.getY(1); point.set(x / 2, y / 2); } private float rotation(MotionEvent event) { double delta_x = (event.getX(0) - event.getX(1)); double delta_y = (event.getY(0) - event.getY(1)); double radians = Math.atan2(delta_y, delta_x); Log.d("Rotation ~~~~~~~~~~~~~~~~~", delta_x + " ## " + delta_y + " ## " + radians + " ## " + Math.toDegrees(radians)); return (float) Math.toDegrees(radians); } } </code></pre> <p>And <code>BaseView.java</code> class:</p> <pre><code>public abstract class BaseView { private int id = -1; private Object tag = null; private Rect bounds = null; public Rect getBounds() { return bounds; } public BaseView() { bounds = new Rect(); } public BaseView(int x, int y, int width, int height) { bounds = new Rect(x, y, x + width, y + height); } public abstract void onDraw(Canvas canvas); public abstract boolean onTouchEvent(MotionEvent event); public void setBounds(int x, int y, int width, int height){ bounds.set(x, y, x + width, y + height); } public void setPosition(int x, int y){ if(x &lt;= 0 || y &lt;= 0){ Log.e("SimpEditText1", "----------------------------------------------------------"); Log.e("SimpEditText1", "-------------0000000000000000000000000000000000------------"); Log.e("SimpEditText1", "----------------------------------------------------------"); } bounds.set(x, y, x + bounds.width(), y + bounds.height()); } public void setScale(int x,int y,int width,int height){ bounds.set(x, y, width,height); } protected boolean isTouchedInBounds(int xPos, int yPos){ return bounds.contains(xPos, yPos); } public Object getTag() { return tag; } public void setTag(Object tag) { this.tag = tag; } public int getId() { return id; } public void setId(int id) { this.id = id; } /** * @param w * @param h * @param oldw * @param oldh */ } </code></pre> <p>please tell me the error in my code.</p>
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    1. USpranavjayadev
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    1. COwhat dose it mean "without using imageview" ? without image view how it will possible
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      1. USdharam
    2. COi have corrected dragging without using imageview ?
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    3. COcant understand what u want to say
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      1. USdharam
 

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