プログラム実行時にbuttonをクリックして画像を回転

方法1:

@Override
    public boolean onKeyDown(int keyCode, KeyEvent event){        
        // TODO Auto-generated method stub
        if(keyCode==KeyEvent.KEYCODE_ALT_LEFT)
        imageView = (ImageView) findViewById(R.id.imageView1);
        RotateAnimation rotateAnimation = new RotateAnimation(0, 10,Animation.RELATIVE_TO_SELF, 0.5f,Animation.RELATIVE_TO_SELF,0.5f);
        rotateAnimation.setFillAfter(true);
        imageView.startAnimation(rotateAnimation);
        return super.onKeyDown(keyCode, event);
    }

 
方法2:

public class ExampleApp extends Activity
{
private ImageView img;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
img=(ImageView)findViewById(R.id.ImageView01);
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.refresh);
// Getting width & height of the given image.
int w = bmp.getWidth();
int h = bmp.getHeight();
// Setting post rotate to 90
Matrix mtx = new Matrix();
mtx.postRotate(90);
// Rotating Bitmap
Bitmap rotatedBMP = Bitmap.createBitmap(bmp, 0, 0, w, h, mtx, true);
BitmapDrawable bmd = new BitmapDrawable(rotatedBMP);
img.setImageDrawable(bmd);
}
}