Android开发实现图片平移、缩放、倒影及旋转功能的方法

概述本文实例讲述了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：

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.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.getHeight()/2);    matrix.setTranslate(20,20);    matrix.postTranslate(20,20);    canvas.drawBitmap(bm,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,//x        0,1.0f,//y        0,1.0f//z    });    canvas.drawBitmap(b1,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.getHeight()/2);    //matrix.setTranslate(20,20);    //镜子效果    matrix.setScale(1,-1);    matrix.postTranslate(0,bm.getHeight());    canvas.drawBitmap(bm,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.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.getHeight()/2);    canvas.drawBitmap(bm,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。

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