本文共 4938 字，大约阅读时间需要 16 分钟。

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);    }}

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