本文实例讲述了Android开发实现图片平移、缩放、倒影及旋转功能的方法。分享给大家供大家参考，具体如下：

解析：

1）根据原来的图片创建新的图片

Bitmap modBm = Bitmap.createBitmap(bm.getWidth()+20, bm.getHeight()+20, bm.getConfig());

2）设置到画布

Canvas canvas = new Canvas(modBm);

3）使用矩阵进行平移…

Matrix matrix = new Matrix();matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2);

4）把改变后图片设置到

canvas.drawBitmap(bm, matrix, paint);imageView2.setImageBitmap(modBm);

示例代码：

1、平移：

public class TranslateImageActivity extends Activity { private ImageView imageView1; private ImageView imageView2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_image_rotate); initViews(); } private void initViews() { imageView1 = (ImageView) findViewById(R.id.imageView1); imageView2 = (ImageView) findViewById(R.id.imageView2); Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.mm0); imageView1.setImageBitmap(bm); Bitmap modBm = Bitmap.createBitmap(bm.getWidth()+20, bm.getHeight()+20, bm.getConfig()); Canvas canvas = new Canvas(modBm); Paint paint = new Paint(); paint.setColor(Color.BLACK); paint.setAntiAlias(true); Matrix matrix = new Matrix(); //matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2); matrix.setTranslate(20, 20); matrix.postTranslate(20, 20); canvas.drawBitmap(bm, matrix, paint); imageView2.setImageBitmap(modBm); }}

2、缩放

public class ScaleImageActivity extends BaseActivity { private static final int DOUBLE = 2; private ImageView iv1, iv2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_scale_iamge); iv1 = (ImageView) findViewById(R.id.imageView1); iv2 = (ImageView) findViewById(R.id.imageView2); Bitmap b1 = BitmapFactory.decodeResource(getResources(), R.drawable.p1); iv1.setImageBitmap(b1); Bitmap b2 = Bitmap.createBitmap(b1.getWidth()*DOUBLE, b1.getHeight(), Config.ARGB_8888); Canvas canvas = new Canvas(b2); Matrix matrix = new Matrix(); matrix.setValues(new float[]{ DOUBLE * 1.0f, 0, 0,//x 0, 1.0f, 0,//y 0, 0, 1.0f//z }); canvas.drawBitmap(b1, matrix, new Paint()); iv2.setImageBitmap(b2); }}

3、倒影

public class ShadeImageActivity extends Activity { private ImageView imageView1; private ImageView imageView2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_image_rotate); initViews(); } private void initViews() { imageView1 = (ImageView) findViewById(R.id.imageView1); imageView2 = (ImageView) findViewById(R.id.imageView2); Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.mm3); imageView1.setImageBitmap(bm); Bitmap modBm = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), bm.getConfig()); Canvas canvas = new Canvas(modBm); Paint paint = new Paint(); paint.setColor(Color.BLACK); paint.setAntiAlias(true); Matrix matrix = new Matrix(); //matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2); //matrix.setTranslate(20, 20); //镜子效果 matrix.setScale(1, -1); matrix.postTranslate(0, bm.getHeight()); canvas.drawBitmap(bm, matrix, paint); imageView2.setImageBitmap(modBm); }}

4、旋转

public class RotateImageActivity extends Activity { private ImageView imageView1; private ImageView imageView2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_image_rotate); initViews(); } private void initViews() { imageView1 = (ImageView) findViewById(R.id.imageView1); imageView2 = (ImageView) findViewById(R.id.imageView2); Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.mm0); imageView1.setImageBitmap(bm); Bitmap modBm = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), bm.getConfig()); Canvas canvas = new Canvas(modBm); Paint paint = new Paint(); paint.setColor(Color.BLACK); paint.setAntiAlias(true); Matrix matrix = new Matrix(); matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2); canvas.drawBitmap(bm, matrix, paint); imageView2.setImageBitmap(modBm); }}

更多关于Android相关内容感兴趣的读者可查看本站专题：《Android图形与图像处理技巧总结》、《Android开发入门与进阶教程》、《Android调试技巧与常见问题解决方法汇总》、《Android基本组件用法总结》、《Android视图View技巧总结》、《Android布局layout技巧总结》及《Android控件用法总结》

希望本文所述对大家Android程序设计有所帮助。