本文實例講述了Android開發實現圖片平移、縮放、倒影及旋轉功能的方法。分享給大家供大家參考，具體如下：
解析：
1）根據原來的圖片創建新的圖片
Bitmap modBm = Bitmap.createBitmap(bm.getWidth()+20, bm.getHeight()+20, bm.getConfig());
2）設置到畫布
Canvas canvas = new Canvas(modBm);
3）使用矩陣進行平移…
Matrix matrix = new Matrix();matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2);
4）把改變后圖片設置到
canvas.drawBitmap(bm, matrix, paint);imageView2.setImageBitmap(modBm);
示例代碼：
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、縮放
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); //鏡子效果 matrix.setScale(1, -1); matrix.postTranslate(0, bm.getHeight()); canvas.drawBitmap(bm, matrix, paint); imageView2.setImageBitmap(modBm); }}4、旋轉
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); }}希望本文所述對大家Android程序設計有所幫助。
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