ImageView不旋轉

Question

ImageView不旋轉？

ImageView arrow1; 
arrow1 =(ImageView) findViewById(R.id.arrow1); 
Matrix mtx = new Matrix(); 
mtx.postRotate(90); 
arrow1.setImageMatrix(mtx); 

有什麼建議嗎？

Answer 1

檢查：http://www.androidpeople.com/android-image-rotate-example

我認爲它可以幫助你

Answer 2

現在，圖像旋轉

arrow1 = (ImageView) findViewById(R.id.arrow1); 
bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.arrow1); 
bmpWidth = bitmap.getWidth(); 
bmpHeight = bitmap.getHeight(); 
float curScale = 1F;   
Matrix matrix = new Matrix(); 
matrix.postScale(curScale, curScale); 
matrix.postRotate(90); 
if(resizedBitmap!=null){ 
resizedBitmap.recycle(); 
} 
resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bmpWidth, bmpHeight, matrix, true); 
arrow1.setImageBitmap(resizedBitmap);