Android图片旋转,缩放,移位,倾斜,对称

1.初始化：

private TestMatrixImageView mTestMatrixImageView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);mTestMatrixImageView=new TestMatrixImageView(MainActivity.this);mTestMatrixImageView.setScaleType(ImageView.ScaleType.MATRIX);//??mTestMatrixImageView.setOnTouchListener(new TouchListenerImpl());setContentView(mTestMatrixImageView);}

a.平移:

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);}

b.围绕图片中心点旋转:

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);}

c.缩放:

private void testScale() {Matrix matrix = new Matrix();matrix.setScale(0.5f, 0.5f);mTestMatrixImageView.setImageMatrix(matrix);showMatrixEveryValue(matrix);}

d.水平倾斜:

private void testSkewX() {Matrix matrix = new Matrix();matrix.setSkew(0.5f, 0);mTestMatrixImageView.setImageMatrix(matrix);showMatrixEveryValue(matrix);}

e.垂直倾斜:

private void testSkewY() {Matrix matrix = new Matrix();matrix.setSkew(0, 0.5f);mTestMatrixImageView.setImageMatrix(matrix);showMatrixEveryValue(matrix);}

f. 水平且垂直倾斜:

private void testSkewXY() {Matrix matrix = new Matrix();matrix.setSkew(0.5f, 0.5f);mTestMatrixImageView.setImageMatrix(matrix);showMatrixEveryValue(matrix);}

g.水平对称--图片关于X轴对称

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);//若是matrix.postTranslate(0, height);//表示将图片上下倒置matrix.postTranslate(0, height*2);mTestMatrixImageView.setImageMatrix(matrix);showMatrixEveryValue(matrix);}

h.垂直对称--图片关于Y轴对称:

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);//若是matrix.postTranslate(width,0);//表示将图片左右倒置matrix.postTranslate(width*2, 0);mTestMatrixImageView.setImageMatrix(matrix);showMatrixEveryValue(matrix);}

j.关于X=Y对称--图片关于X=Y轴对称:

private void testSymmetryXY() {Matrix matrix = new Matrix();int width = mTestMatrixImageView.getBitmap().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);}

testMatrixImageView.java:

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");//画原图canvas.drawBitmap(mBitmap, 0, 0, null);//画经过Matrix变化后的图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;}}

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