pinch to zoom android

Learn to slide the android gesture, Multi-Touch Zoom to reduce the picture, share for everyone to refer to, the specific code as follows1. The layout file is as follows Main.xml 2. Custom zoom Picture Control Zoomimageview.java Code: Package com.ymw.zoomimage; Import java.util.Observable; Import Java.util.Observer; Import Android.content.Conte

This article describes the Android implementation of the rotation, zoom in, reduce the image of the method. Share to everyone for your reference, specific as follows: Project needs to do a preview of the function of the picture Originally conceived as a custom view, the OnDraw used to generate a new bitmap to magnify, shrink But because the mobile phone memory is limited, after several times magnified, w

Savebmptosd (String dir, Bitmap BM, string filename, int quantity, Boolean recyle) {Boolean ret = true; if (BM = = null) {return false;} File Dirpath = new file (dir); if (!exists (dir)) {dirpath.mkdirs (); } if (!dir.endswith (File.separator)) {dir + = File.separator; } File File = new file (dir + filename); OutputStream outstream = null; try {file.createnewfile (); OutStream = new FileOutputStream (file); Bm.compres

//Hide Zoom Controls intChildCount =Mmapview.getchildcount (); View Zoom=NULL; for(inti =0; i ) {View child=Mmapview.getchildat (i); if(Child instanceof zoomcontrols) {Zoom=Child ; Break; }} zoom.setvisibility (View.gone); //hide the scale bar control intCount =Mmapview.getchildcount (); View Scale=NULL; for(in

Reprint Please specify source: http://blog.csdn.net/zhaokaiqiang1992The open source project that we are going to introduce to you today is the Photoview project from GitHub, the main function of this project is to achieve the reduction of the image of the common ImageView control, including single touch and multi touch.PhotoView's GitHub project address: Https://github.com/chrisbanes/PhotoViewThe directory structure of the test projectWe can copy the Photoview resource files directly to the proj

interface layout, linear layout, vertical arrangement, two x ImageViewGet to two ImageView ObjectsCall the Bitmapfactory.decoderesource (res,id) method to get the Bitmap ObjectParameters:res is getresource (),ID is resource ID such as: r.drawable.xxxCall the ImageView object's setimageviewbitmap (), parameter:Bitmap ObjectGet an editable Bitmap ObjectCall the createbitmap (width,height,config) method of the Bitmap object to get an editable Bitmap ObjectParameters: Wide Height configuration, th

provide timing.Interpolatedtime is 0~1, which is the percentage of time.Animation ani=new Animation () {@Overrideprotected void applytransformation (float interpolatedtime,transformation t) {/ /TODO auto-generated method Stubmyview.setdegree ((int) (INTERPOLATEDTIME*300F));}; Ani.setduration (n); Myview.startanimation (ANI);//===========================================================================Define your own view, setdegress can change the arc angle:Private class MyView1 extends ImageVie

1 Private StaticBitmap Big (Bitmap Bitmap) {2Matrix Matrix =NewMatrix ();3Matrix.postscale (1.5f,1.5f);//ratio of long and wide magnification reduction4Bitmap resizebmp = Bitmap.createbitmap (Bitmap,0,0, Bitmap.getwidth (), Bitmap.getheight (), Matrix,true);5 returnresizebmp;6 }7 8 Private StaticBitmap Small (Bitmap Bitmap) {9Matrix Matrix =NewMatrix ();TenMatrix.postscale (0.8f,0.8f);//ratio of long and wide magnification reduction OneBitmap resizebmp = Bitmap.createbitmap (Bitmap,0,0, Bitm

ScalesketchpaddemoProject Address:Demo APK experience DownloadDemo2 apk Experience DownloadUsage:Enter the project root directory: Https://github.com/ShaunSheep/ScaleSketchPadDemoClone or download project to local,Open Android Studio->file->new->import new moudle-> Check your local app or AAP2This project consists of two modules App1 for ordinary drawing board APP2 for the drawing board that can be issued Easy for

Android custom View-like Ctrip homepage click zoom ImageView, androidimageview I recently launched a Ctrip App. I clicked on the home page and noticed that when I clicked the button, it wasn't the color-changing effect we often saw. Instead, I first contracted it. When I opened it, back to the original size, I felt that this effect was small, but it was very novel. So I decided to imitate this small effect

(); } return bitmap; } public class Mulitpointtouchlistener implements Ontouchlistener { Matrix matrix = new Matrix (); Matrix Savedmatrix = new Matrix (); public ImageView image; static final int NONE = 0; static final int DRAG = 1; static final int ZOOM = 2; int mode = NONE; PointF start = new PointF (); PointF mid = new PointF (); float olddist = 1f; Public Mulitpointtouchlistener (ImageView image) { Super (); This

Picture enlargement idea:First, you can transform the image through the Matrix object, zoom in when you choose, and zoom out to the original size when you lose focus.Double scale = 1.2;int width = bm.getwidth ();int height = bm.getheight ();LOG.I ("Size:", width+ "");float ScaleWidth = (float) (scale*width);float ScaleHeight = (float) (scale*height);LOG.I ("Size:", scalewidth+ "");Matrix matrix = new Matrix

the bitmap on the View zoom and translation transformation, and matrix object is the implementation of the image geometric transformation in Android matrices, support translation, amplification, reduction, error cutting, rotation and other common operations.Update and display of bitmap objects in viewBy overloading the OnDraw method, the canvas implementation is used to draw the bitmap object, and the refr

-v.getheight (); } //Assign ValueImage.layout (left, top, right, bottom); //Change to a new labelx=Event. GETRAWX (); Y=Event. Getrawy (); /*return false;*/ } Break; } return true; } }); } //Global Move@Override PublicBoolean ontouchevent (motioneventEvent) { //TODO auto-generated Method Stub /*Image.setx (Event.getx ()); Image.sety (E

android:background= "@drawable/missThe first is to make it transparent (in fact android:background= "@null" is also possible)The second kind is more straightforward. Change the background directly. 3Well, by the end of this, I'll tell you all about the solutions I've come up with after I've summed up the questions.END Precautions About ImageButton long-width fixation: Because the system will first determine the image width and height. If the control is not fixed and the contro

There are many pictures on the internet on the scale of the demo, I do not feel very good, recently on GitHub saw a simple support multi-finger zoom image of the Android view class Gesture-imageview (address: https:// Github.com/jasonpolites/gesture-imageview), feel pretty good, now write a demo convenient later used to callThe first step: Add the library, the recommended direct download zip, import project

: Canvas.drawbitmap (BMP, 0, 0, NULL); 5. Zoom Bitmap 1 will be a bitmap in accordance with the requirements of the redraw, the picture after the bitmap is what we need, and the display of the bitmap almost the same: Copy Code code as follows: Drawbitmap (Bitmap Bitmap, Rect src, Rect DST, Paint Paint) 2 on the basis of the original bitmap, scale in-situ diagram, create a new bitmap: Copy Code code as follows:

Android zoom in and drag bitmap in custom viewOne: Basic realization ideasimplementation of custom view– based on view class Myimageview class. complete the Ontouchlistener interface in the activity class using view to enable touch event monitoring of Custom viewZoom in and dragThe Bitmap object is dragged on the view based on a single touch, and the edge of the view is detected to prevent dragging across

(R.id.photoview); }}XML version= "1.0" encoding= "Utf-8"?>LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"android:orientation= "vertical"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"> Uk.co.senab.photoview.PhotoViewAndroid:id= "@+id/photoview"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent" />LinearLayout>Run the effect as follows, support drag up and down, directly double

;} //设置监听 setOnTouchListener(this);5. The important method in Onscalegesturelistener //使用ScaleGestureListener去实现多点触控@Overridepublic boolean onScale(ScaleGestureDetector scaleGestureDetector) { if (null == getDrawable()) { return true; }//下一步6 处理return true;}6. //缩放中 //获取当前图片缩放scale float scale = getCurrentScale(); //获取缩放因子 float scaleFactor = scaleGestureDetector.getScaleFactor(); //缩放值达到最大和最小的情况 scaleFactor>1表示正在放大 7, Checkoutbounds () private void Checkoutboun