Android图片旋转,缩放,位移,倾斜,对称完整示例(二)——Bitmap.createBitmap()和Matrix

MainActivity如下:

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描述: * 利用Bitmap.createBitmap()和Matrix实现图像 * 的旋转,缩放,位移,倾斜. * 该方式的作用和mImageView.setImageMatrix(matrix); * 是一样的 *  * 备注说明: * 利用Bitmap.createBitmap()和Matrix的方式没有实现图像 * 关于X轴,Y轴和XY的对称. * 明白怎么实现的coder请指点,多谢. * */public class MainActivity extends Activity {private Bitmap mBitmap;private Bitmap mNewBitmap;private ImageView mImageView;    @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();        //平移的两种方式,效果一致    //testTranslate1(mBitmap);    testTranslate2(mBitmap);    //围绕图片中心点旋转且位移的两种方式,效果一致    //testRotate1(mBitmap);    //testRotate2(mBitmap);        //围绕原点旋转后平移的两种方式,效果一致    //testRotateAndTranslate1(mBitmap);    //testRotateAndTranslate2(mBitmap);        //测试缩放的两种方式,效果一致    //testScale1();    //testScale2(mBitmap);        //测试倾斜各两种方式,效果一致    //testSkewX1();    //testSkewX2(mBitmap);    //testSkewY1();    //testSkewY2(mBitmap);    //testSkewXY1();    //testSkewXY2(mBitmap);        //测试对称    //testSymmetryX(mBitmap);    //testSymmetryY(mBitmap);    //testSymmetryXY(mBitmap);    }                //平移的方式一private void testTranslate1(Bitmap bitmap){Matrix matrix=new Matrix();int width=bitmap.getWidth();int height=bitmap.getHeight();matrix.postTranslate(width, height);mImageView.setImageMatrix(matrix);}    //平移的方式二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);}//围绕图片中心点旋转且位移的方式一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);}//围绕图片中心点旋转且位移的方式二//注意问题://在方式一种旋转45°采用matrix.postRotate(45f, width/2, height/2);即可//但在方式二中只需旋转22.5度matrix.postRotate(45/2f, width/2, height/2);private 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);}//围绕原点旋转后平移的方式一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);}//围绕原点旋转后平移的方式二//注意问题://同上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);}//缩放的方式一private void testScale1() {Matrix matrix = new Matrix();matrix.setScale(0.5f, 0.5f);mImageView.setImageMatrix(matrix);}//缩放的方式二private void testScale2(Bitmap bitmap) {Matrix matrix = new Matrix();int width =bitmap.getWidth();int height = bitmap.getHeight();matrix.setScale(0.5f, 0.5f);mNewBitmap=Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, false);    mImageView.setImageBitmap(mNewBitmap);}//水平倾斜的方式一private void testSkewX1() {Matrix matrix = new Matrix();matrix.setSkew(0.5f, 0);mImageView.setImageMatrix(matrix);}//水平倾斜的方式二private void testSkewX2(Bitmap bitmap) {Matrix matrix = new Matrix();int width =bitmap.getWidth();int height = bitmap.getHeight();matrix.setSkew(0.5f, 0);mNewBitmap=Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, false);    mImageView.setImageBitmap(mNewBitmap);}// 垂直倾斜的方式一private void testSkewY1() {Matrix matrix = new Matrix();matrix.setSkew(0, 0.5f);mImageView.setImageMatrix(matrix);}// 垂直倾斜的方式二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);}// 水平且垂直倾斜的方式一private void testSkewXY1() {Matrix matrix = new Matrix();matrix.setSkew(0.5f, 0.5f);mImageView.setImageMatrix(matrix);}// 水平且垂直倾斜的方式二private void testSkewXY2(Bitmap bitmap) {Matrix matrix = new Matrix();int width =bitmap.getWidth();int height = bitmap.getHeight();matrix.setSkew(0.5f, 0.5f);mNewBitmap=Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, false);    mImageView.setImageBitmap(mNewBitmap);}// 水平对称--图片关于X轴对称private void testSymmetryX(Bitmap bitmap) {Matrix matrix = new Matrix();int height =bitmap.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);mImageView.setImageMatrix(matrix);}// 垂直对称--图片关于Y轴对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);//若是matrix.postTranslate(width,0);//表示将图片左右倒置matrix.postTranslate(width*2, 0);    mImageView.setImageMatrix(matrix);}// 关于X=Y对称private void testSymmetryXY(Bitmap bitmap) {Matrix matrix = new Matrix();int width = bitmap.getWidth();int height = 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如下:

<?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>