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2014/10/16 ¤W¤È 08:23:30

android Programming Glossary: scalegesturedetector

Android Image View Pinch Zooming

http://stackoverflow.com/questions/10630373/android-image-view-pinch-zooming

for zooming image view. On ScaleListener I added ScaleGestureDetector.getFocusX and getFocusY for content to zoom about the focal.. context AttributeSet attrs this context attrs 0 private ScaleGestureDetector mScaleDetector private float mScaleFactor 1.f Existing code.. attrs int defStyle super context attrs defStyle Create our ScaleGestureDetector mScaleDetector new ScaleGestureDetector context new ScaleListener..

Is there a built in API for handling pinch-zoom functionality in Android

http://stackoverflow.com/questions/2645648/is-there-a-built-in-api-for-handling-pinch-zoom-functionality-in-android

code itself. The interesting bits seem to be in class ScaleGestureDetector which is not public but its javadoc says @hide Pending API approval.. so hopefully it will become public at some point. Update ScaleGestureDetector is now part of the Android 2.2 API. share improve this answer..

Android: Bitmaps loaded from gallery are rotated in ImageView

http://stackoverflow.com/questions/3647993/android-bitmaps-loaded-from-gallery-are-rotated-in-imageview

Pinch zoom for custom view

http://stackoverflow.com/questions/5216658/pinch-zoom-for-custom-view

zoom there's only a few lines of code you'll need private ScaleGestureDetector mScaleDetector private float mScaleFactor 1.f public MyCustomView.. Context mContext ... Your view code ... mScaleDetector new ScaleGestureDetector context new ScaleListener @Override public boolean onTouchEvent.. public boolean onTouchEvent MotionEvent ev Let the ScaleGestureDetector inspect all events. mScaleDetector.onTouchEvent ev return true..

Image in Canvas with touch events

http://stackoverflow.com/questions/5743328/image-in-canvas-with-touch-events

import android.view.MotionEvent import android.view.ScaleGestureDetector import android.view.View public class MyImageView extends View.. private int mActivePointerId INVALID_POINTER_ID private ScaleGestureDetector mScaleDetector private float mScaleFactor 1.f public MyImageView.. defStyle super context attrs defStyle mScaleDetector new ScaleGestureDetector context new ScaleListener @Override public boolean onTouchEvent..

How to find absolute position of click while zoomed in

http://stackoverflow.com/questions/8180442/how-to-find-absolute-position-of-click-while-zoomed-in

function act when a scale gesture is detected class ImageScaleGestureDetector extends SimpleOnScaleGestureListener @Override public boolean.. @Override public boolean onScale ScaleGestureDetector detector if mScaleAllowed mCustomImageView.scale detector.getScaleFactor..

Android Image View Pinch Zooming

http://stackoverflow.com/questions/10630373/android-image-view-pinch-zooming

Pinch Zooming I am using code sample from Making Sense of Multitouch for zooming image view. On ScaleListener I added ScaleGestureDetector.getFocusX and getFocusY for content to zoom about the focal point of the gesture. It is working fine. The problem is on.. this context null 0 public TouchImageViewSample Context context AttributeSet attrs this context attrs 0 private ScaleGestureDetector mScaleDetector private float mScaleFactor 1.f Existing code ... public TouchImageViewSample Context context AttributeSet.. public TouchImageViewSample Context context AttributeSet attrs int defStyle super context attrs defStyle Create our ScaleGestureDetector mScaleDetector new ScaleGestureDetector context new ScaleListener borderPaint new Paint borderPaint.setARGB 255 255 128..

Is there a built in API for handling pinch-zoom functionality in Android

http://stackoverflow.com/questions/2645648/is-there-a-built-in-api-for-handling-pinch-zoom-functionality-in-android

as usual my first instinct was to look into the Android source code itself. The interesting bits seem to be in class ScaleGestureDetector which is not public but its javadoc says @hide Pending API approval so hopefully it will become public at some point. Update..

Android: Bitmaps loaded from gallery are rotated in ImageView

http://stackoverflow.com/questions/3647993/android-bitmaps-loaded-from-gallery-are-rotated-in-imageview

Pinch zoom for custom view

http://stackoverflow.com/questions/5216658/pinch-zoom-for-custom-view

Sense of Multitouch If you just want to implement pinch to zoom there's only a few lines of code you'll need private ScaleGestureDetector mScaleDetector private float mScaleFactor 1.f public MyCustomView Context mContext ... Your view code ... mScaleDetector.. private float mScaleFactor 1.f public MyCustomView Context mContext ... Your view code ... mScaleDetector new ScaleGestureDetector context new ScaleListener @Override public boolean onTouchEvent MotionEvent ev Let the ScaleGestureDetector inspect all.. new ScaleGestureDetector context new ScaleListener @Override public boolean onTouchEvent MotionEvent ev Let the ScaleGestureDetector inspect all events. mScaleDetector.onTouchEvent ev return true @Override public void onDraw Canvas canvas super.onDraw canvas..

Image in Canvas with touch events

http://stackoverflow.com/questions/5743328/image-in-canvas-with-touch-events

import android.util.AttributeSet import android.util.Log import android.view.MotionEvent import android.view.ScaleGestureDetector import android.view.View public class MyImageView extends View private static final int INVALID_POINTER_ID 1 private Drawable.. mPosY private float mLastTouchX private float mLastTouchY private int mActivePointerId INVALID_POINTER_ID private ScaleGestureDetector mScaleDetector private float mScaleFactor 1.f public MyImageView Context context this context null 0 mImage getResources.. 0 public MyImageView Context context AttributeSet attrs int defStyle super context attrs defStyle mScaleDetector new ScaleGestureDetector context new ScaleListener @Override public boolean onTouchEvent MotionEvent ev Let the ScaleGestureDetector inspect all..

How to find absolute position of click while zoomed in

http://stackoverflow.com/questions/8180442/how-to-find-absolute-position-of-click-while-zoomed-in

Y coordinates based on the current screen . I then have this function act when a scale gesture is detected class ImageScaleGestureDetector extends SimpleOnScaleGestureListener @Override public boolean onScale ScaleGestureDetector detector if mScaleAllowed mCustomImageView.scale.. is detected class ImageScaleGestureDetector extends SimpleOnScaleGestureListener @Override public boolean onScale ScaleGestureDetector detector if mScaleAllowed mCustomImageView.scale detector.getScaleFactor mCenterX mCenterY return true The scale function..