Android picture rotation, scaling, displacement, tilt, symmetry complete example (ii)--bitmap.createbitmap () and matrix

Mainactivity as follows:

Package Cc.c;import Android.app.activity;import Android.graphics.bitmap;import android.graphics.matrix;import Android.graphics.drawable.bitmapdrawable;import Android.os.bundle;import android.widget.imageview;/** * Demo Description: * Use Bitmap.createbitmap () and matrix to achieve the rotation, scaling, displacement, and tilt of the image *. * The role of the method and Mimageview.setimagematrix (matrix); * It's the same * * NOTE: * The use of Bitmap.createbitmap () and matrix method does not implement the image * about the x-axis, y-axis and xy symmetry. * Understand how to achieve the coder please advise, thank you. * */public class Mainactivity extends Activity {private Bitmap mbitmap;private Bitmap mnewbitmap;private ImageView Mimagev    Iew;        @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.main);    Init ();    } private void Init () {mimageview= (ImageView) Findviewbyid (R.id.imageview);         Mimageview.setscaletype (ImageView.ScaleType.MATRIX);    Bitmapdrawable bitmapdrawable= (bitmapdrawable) mimageview.getdrawable ();        Mbitmap=bitmapdrawable.getbitmap (); The two ways of panning, the effect is consistent//tEstTranslate1 (MBITMAP);    TestTranslate2 (MBITMAP);    Around the center point of the picture rotation and displacement of two ways, the effect is consistent//testrotate1 (MBITMAP);        TestRotate2 (MBITMAP);    The two ways of translation around the origin point are consistent//testrotateandtranslate1 (MBITMAP);        TestRotateAndTranslate2 (MBITMAP);    Test the scaling of two ways, the effect of consistent//testscale1 ();        TestScale2 (MBITMAP);    Test tilt Each of the two ways, the effect is consistent//testskewx1 ();    TestSkewX2 (MBITMAP);    TestSkewY1 ();    TestSkewY2 (MBITMAP);    TestSkewXY1 ();        TestSkewXY2 (MBITMAP);    Test symmetrical//testsymmetryx (MBITMAP);    Testsymmetryy (MBITMAP);    Testsymmetryxy (MBITMAP); }//Panning way one private void testTranslate1 (Bitmap Bitmap) {matrix matrix=new matrix (); int width=bitmap.getwidth ()    ; int height=bitmap.getheight (); matrix.posttranslate (width, height); Mimageview.setimagematrix (matrix);} Panning way Two private void TestTranslate2 (Bitmap Bitmap) {Matrix matrix=mimageview.getimagematrix (); int width= Bitmap.getwidth (); int height=bitmap.getheight (); matrix.posttranslate (width, height); mnewbitmaP=bitmap.createbitmap (Bitmap, 0, 0, width, height, matrix, false); Mimageview.setimagebitmap (MNEWBITMAP);} Rotation and displacement around the center point of the picture a private void testRotate1 (Bitmap Bitmap) {matrix matrix=new matrix (); int width=bitmap.getwidth (); int Height=bitmap.getheight (); Matrix.postrotate (45f, WIDTH/2, HEIGHT/2); matrix.posttranslate (width, height); Mimageview.setimagematrix (matrix);} How to rotate and shift around the center point of the picture two//NOTE://In the manner of a rotational 45° using Matrix.postrotate (45f, WIDTH/2, HEIGHT/2); But in mode two just rotate 22.5 degrees matrix.postrotate (45/2f, WIDTH/2, HEIGHT/2);p rivate void TestRotate2 (Bitmap Bitmap) {Matrix matrix= Mimageview.getimagematrix (); int width=bitmap.getwidth (); int height=bitmap.getheight (); Matrix.postrotate (45/2f, WIDTH/2, HEIGHT/2); matrix.posttranslate (width, height); Mnewbitmap=bitmap.createbitmap (Bitmap, 0, 0, width, height, Matrix, False); Mimageview.setimagebitmap (Mnewbitmap);} How to pan around the origin a private void testRotateAndTranslate1 (Bitmap Bitmap) {Matrix matrix = new Matrix (); int width = Bitmap.getwidth (); int height = bitmap.getheight (); Matrix.setrotate (45f); matrix.posttranslate (width, height); Mimageview.setimagematrix (matrix);} How to pan around the origin two//NOTE://Ibid. private void TestRotateAndTranslate2 (Bitmap Bitmap) {Matrix Matrix = Mimageview.getimagematrix (); int width =bitmap.getwidth (); int height = bitmap.getheight (); matrix.setrotate (45/2f);    Matrix.posttranslate (width, height); Mnewbitmap=bitmap.createbitmap (Bitmap, 0, 0, width, height, matrix, false); Mimageview.setimagebitmap (MNEWBITMAP);} Scaled way one private void TestScale1 () {Matrix matrix = new Matrix (); Matrix.setscale (0.5f, 0.5f); Mimageview.setimagematrix ( Matrix);} Scaled way two private void TestScale2 (Bitmap Bitmap) {Matrix matrix = new Matrix (); int width =bitmap.getwidth (); int height = bit Map.getheight (); Matrix.setscale (0.5f, 0.5f); Mnewbitmap=bitmap.createbitmap (Bitmap, 0, 0, width, height, matrix, False    ); Mimageview.setimagebitmap (MNEWBITMAP);} Horizontally inclined way one private void testSkewX1 () {Matrix matrix = new Matrix (); Matrix.setskew (0.5f, 0); Mimageview.setimagematrix ( Matrix);} Horizontally inclined SideType two private void testSkewX2 (Bitmap Bitmap) {Matrix matrix = new Matrix (); int width =bitmap.getwidth (); int height = bitmap.ge    Theight (); Matrix.setskew (0.5f, 0); Mnewbitmap=bitmap.createbitmap (Bitmap, 0, 0, width, height, matrix, false); Mimageview.setimagebitmap (MNEWBITMAP);} Vertically sloping way one private void testSkewY1 () {Matrix matrix = new Matrix (); Matrix.setskew (0, 0.5f); Mimageview.setimagematrix ( Matrix);} Vertically sloping way two private void testSkewY2 (Bitmap Bitmap) {Matrix matrix = new Matrix (); int width =bitmap.getwidth (); int height = Bitmap.getheight (); Matrix.setskew (0, 0.5f); Mnewbitmap=bitmap.createbitmap (bitmap, 0, 0, width, height, matrix, false)    ; Mimageview.setimagebitmap (MNEWBITMAP);} Horizontal and vertical tilt way one private void testSkewXY1 () {Matrix matrix = new Matrix (); Matrix.setskew (0.5f, 0.5f); Mimageview.setimagematrix (matrix);} Horizontal and vertical tilt mode two private void testSkewXY2 (Bitmap Bitmap) {Matrix matrix = new Matrix (); int width =bitmap.getwidth (); int Heigh t = Bitmap.getheight (); Matrix.setskew (0.5f, 0.5f); mnewbitmap=bItmap.createbitmap (bitmap, 0, 0, width, height, matrix, false); Mimageview.setimagebitmap (MNEWBITMAP);} Horizontal symmetry--Pictures about x axisymmetric private void Testsymmetryx (Bitmap Bitmap) {Matrix matrix = new Matrix (); int height =bitmap.getheight (); f Loat matrixvalues[] = {1f, 0f, 0f, 0f, -1f, 0f, 0f, 0f, 1f};matrix.setvalues (matrixvalues);//If Matrix.posttranslate (0, H eight);//indicates that the picture is upside down matrix.posttranslate (0, height*2); Mimageview.setimagematrix (matrix);} Vertical symmetry--picture about y-axis to private void Testsymmetryy (Bitmap Bitmap) {Matrix matrix = new Matrix (); int width=bitmap.getwidth (); Float matrixvalues[] = { -1f, 0f, 0f, 0f, 1f, 0f, 0f, 0f, 1f};matrix.setvalues (matrixvalues);//If Matrix.posttranslate (Widt    h,0);//Indicates the picture is inverted matrix.posttranslate (width*2, 0); Mimageview.setimagematrix (matrix);} About x=y symmetric private void Testsymmetryxy (Bitmap Bitmap) {Matrix matrix = new Matrix (); int width = bitmap.getwidth (); int Heigh t = bitmap.getheight (); float matrixvalues[] = {0f, -1f, 0f, -1f, 0f, 0f, 0f, 0f, 1f};matrix.setvalues (matrixvalues); Matrix.posttranslate (Width+height, width+height); Mimageview.setimagematrix (matrix);} }

Main.xml as follows:

<?xml version= "1.0" encoding= "Utf-8"? ><relativelayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" fill_parent "    android:layout_height=" fill_parent "    >    < ImageView        android:id= "@+id/imageview"        android:layout_width= "fill_parent"        android:layout_height= " Fill_parent "        android:src=" @drawable/A "     />      </RelativeLayout>