MainActivity如下:
main.xml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>
