Android Drawable、Bitmap、byte[]間の変換
2434 ワード
自動回転http://blog.csdn.net/june5253/article/details/7826597
1、Bitmap-->Drawable
1、Bitmap-->Drawable
Bitmap drawable2Bitmap(Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable) drawable).getBitmap();
} else if (drawable instanceof NinePatchDrawable) {
Bitmap bitmap = Bitmap
.createBitmap(
drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight(),
drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
: Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight());
drawable.draw(canvas);
return bitmap;
} else {
return null;
}
}
2、資源から取得したDrawable-->BitmapBitmap bitmap=BitmapFactory.decodeResource(res,R.drawable.pic);
3、Bitmap-->DrawableDrawable bitmap2Drawable(Bitmap bitmap){
new BitmapDrawable(bitmap);
}
4、Bitmap-->byte[]byte[] Bitmap2Bytes(Bitmap bm) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
return baos.toByteArray();
}
5、byte[]--BitmapBitmap Bytes2Bimap(byte[] b) {
if (b.length != 0) {
return BitmapFactory.decodeByteArray(b, 0, b.length);
} else {
return null;
}
}