Android -- 重置Bitmap大小&&Bitmap轉角度

重置Bitmap大小                                                                          

Bitmap bitMap = BitmapFactory.decodeFile(path);
int width = bitMap.getWidth();
int height = bitMap.getHeight();
// 設置想要的大小
int newWidth = 500;
int newHeight = 400;
// 計算縮放比例
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// 取得想要縮放的matrix參數
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
// 得到新的圖片
 bitMap = Bitmap.createBitmap(bitMap, 0, 0, width, height, matrix, true);

Bitmap轉角度                                                                            

Bitmap bm = BitmapFactory.decodeByteArray(imgdata, 0,imgdata.length);
Matrix matrix = new Matrix();
matrix.preRotate(270);
bm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),bm.getHeight(), matrix, true);

imgdata為camera開發的時候的圖片數據。

這里其實找到了bitmap就OK了。

 

 

轉載請注明出處：http://www.cnblogs.com/yydcdut/p/3744875.html