Android图片旋转,缩放,移位,倾斜,对称

1.初始化：

private TestMatrixImageView mTestMatrixImageView;
	@Override
	protected 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);
	}
	@Override
	protected 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);
	}
	@Override
	public void setImageMatrix(Matrix matrix) {
		System.out.println("---> setImageMatrix");
		this.mMatrix.set(matrix);
		super.setImageMatrix(matrix);
	}
	
	public Bitmap getBitmap(){
		System.out.println("---> getBitmap");
		return mBitmap;
	}

}