Android picture rotation, scaling, displacement, tilt, Symmetry complete demo sample (i)--imageview.setimagematrix (matrix) and matrix

Mainactivity such as the following:

Import Android.os.bundle;import Android.view.motionevent;import Android.view.view;import Android.view.view.ontouchlistener;import Android.widget.imageview;import Android.app.activity;import android.graphics.matrix;/** * Demo Description: * using Mimageview.setimagematrix (Matrix) to achieve * image translation, scaling, rotation, tilt and symmetry * * Reference information: * 0 http:/ /blog.csdn.net/pathuang68/article/details/6991988 * 1 http://blog.csdn.net/mingli198611/article/details/7830633 * * Thank you very much */public class Mainactivity extends Activity {private Testmatriximageview mtestmatriximageview; @Ov errideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); mtestmatriximageview= New Testmatriximageview (Mainactivity.this); Mtestmatriximageview.setscaletype (ImageView.ScaleType.MATRIX);//?
Mtestmatriximageview.setontouchlistener (New Touchlistenerimpl ()); Setcontentview (Mtestmatriximageview);} Private class Touchlistenerimpl implements ontouchlistener{@Overridepublic boolean OnTouch (View V, motionevent event) { if (Event.getaction () ==motionevent.action_up) {//1 test pan testtranslate ();//2 test surround Image Center point rotate//testrotate ();//3 Test the rotation of the original point after the translation//testrotateandtranslate (),//4 zoom//testscale ();//5 horizontal tilt//testskewx ();//6 vertical Tilt//testskewy ();//7 horizontal and vertical tilt/ /testskewxy ();//8 horizontal symmetrical//testsymmetryx ()//9 vertical symmetry//testsymmetryy ()//10 about x=y symmetric//testsymmetryxy ();} return true;}} Translate private void Testtranslate () {Matrix matrix=new matrix (); int Width=mtestmatriximageview.getbitmap (). GetWidth (); int Height=mtestmatriximageview.getbitmap (). GetHeight (); matrix.posttranslate (width, height); Mtestmatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} Around the center point of the picture rotates the private void testrotate () {Matrix matrix=new matrix (); int Width=mtestmatriximageview.getbitmap (). getwidth (); int Height=mtestmatriximageview.getbitmap (). GethEight (); Matrix.postrotate (45f, WIDTH/2, HEIGHT/2); matrix.posttranslate (width, height); Mtestmatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} Pan after rotation of the origin point//Note the following three lines of code run in order://matrix.setrotate (45f);//matrix.pretranslate (-width,-height);// Matrix.posttranslate (width, height);//First run matrix.pretranslate (-width,-height);//After running Matrix.setrotate (45f);// Run matrix.posttranslate (width, height);p rivate void Testrotateandtranslate () {Matrix matrix = new Matrix (); int width = MT Estmatriximageview.getbitmap (). getwidth (); int height = Mtestmatriximageview.getbitmap (). GetHeight (); Matrix.setrotate (45f); Matrix.pretranslate (-width,-height); matrix.posttranslate (width, height); Mtestmatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} Scale private void Testscale () {Matrix matrix = new Matrix (); Matrix.setscale (0.5f, 0.5f); Mtestmatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} Horizontal tilt private void testskewx () {Matrix matrix = new Matrix (); Matrix.setskew (0.5f, 0); mtestMatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} Vertical tilt private void Testskewy () {Matrix matrix = new Matrix (); Matrix.setskew (0, 0.5f); Mtestmatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} Horizontal and vertical tilt private void Testskewxy () {Matrix matrix = new Matrix (); Matrix.setskew (0.5f, 0.5f); Mtestmatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} Horizontal symmetry--Pictures about x axisymmetric private void Testsymmetryx () {Matrix matrix = new Matrix (); int height = Mtestmatriximageview.getbitmap () . GetHeight (); float matrixvalues[] = {1f, 0f, 0f, 0f, -1f, 0f, 0f, 0f, 1f};matrix.setvalues (matrixvalues);//If Matrix.post Translate (0, height);//indicates that the picture is upside down matrix.posttranslate (0, height*2); Mtestmatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} Vertical symmetry--picture about y axisymmetric private void Testsymmetryy () {Matrix matrix = new Matrix (); int Width=mtestmatriximageview.getbitmap (). GetWidth (); float matrixvalues[] = { -1f, 0f, 0f, 0f, 1f, 0f, 0f, 0f, 1f};matrix.setvalues (matrixvalues);//If Matrix.posttranslate (width,0),//means the picture is inverted matrix.posttranslate (width*2, 0); Mtestmatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} About X=y symmetry--Pictures about x=y axisymmetric private void Testsymmetryxy () {Matrix matrix = new Matrix (); int width = Mtestmatriximageview.getbit  Map (). getwidth (); int height = Mtestmatriximageview.getbitmap (). GetHeight (); float matrixvalues[] = {0f, -1f, 0f, -1f, 0f, 0f, 0f, 0f, 1f};matrix.setvalues (matrixvalues), Matrix.posttranslate (Width+height, width+height); Mtestmatriximageview.setimagematrix (matrix); Showmatrixeveryvalue (matrix);} Gets the transform matrix each value in the Showmatrixeveryvalue (matrix matrix) {float matrixvalues []=new float[9]; Matrix.getvalues (matrixvalues); for (int i = 0; I <3; i++) {String valuestring= "", for (int j = 0; J < 3; J + +) {ValueS Tring=matrixvalues[3*i+j]+ ""; System.out.println ("+ (i+1) +" column with the value of "+ (j+1) +" = "+valuestring");}}}

Testmatriximageview such as the following:

Package Cn.testmatrix;import Android.content.context;import Android.graphics.bitmap;import Android.graphics.bitmapfactory;import Android.graphics.canvas;import Android.graphics.matrix;import android.widget.imageview;/** * Summary: * run in mainactivity: * Mtestmatriximageview.setimagematrix (Matrix); * This own definition view will call Setimagematrix (Matrix matrix) * and then call OnDraw (Canvas canvas) */public class Testmatriximageview extends    Imageview{private Matrix Mmatrix; Private Bitmap Mbitmap;public Testmatriximageview (context context) {super (context); mmatrix=new Matrix (); mbitmap= Bitmapfactory.decoderesource (Getresources (), R.drawable.icon);} @Overrideprotected void OnDraw (canvas canvas) {SYSTEM.OUT.PRINTLN ("---> onDraw");//Painting the original Canvas.drawbitmap (Mbitmap, 0, 0, NULL);//Draw after Matrix changed figure Canvas.drawbitmap (Mbitmap, Mmatrix, null); Super.ondraw (canvas);} @Overridepublic void Setimagematrix (Matrix matrix) {SYSTEM.OUT.PRINTLN ("---> Setimagematrix"); This.mMatrix.set ( Matrix); Super.setimagematrix (matrix);} Public Bitmap GetbItmap () {System.out.println ("---> getbitmap"); return mbitmap;}} 

Main.xml such as the following:

<relativelayout xmlns:android= "http://schemas.android.com/apk/res/android"    xmlns:tools= "http// Schemas.android.com/tools "    android:layout_width=" match_parent "    android:layout_height=" Match_parent "    >    <textview        android:layout_width= "wrap_content"        android:layout_height= "Wrap_content"        android:text= "@string/hello_world"/></relativelayout>

Android picture rotation, scaling, displacement, tilt, Symmetry complete demo sample (i)--imageview.setimagematrix (matrix) and matrix