android 通过流获取bitmap
来源：互联网 发布：html5仿微信红包源码 编辑：程序博客网 时间：2024/04/25 20:26
private Bitmap decodeFile(File f){ Bitmap b = null; try { //Decode image size BitmapFactory.Options o = new BitmapFactory.Options(); o.inJustDecodeBounds = true; FileInputStream fis = new FileInputStream(f); BitmapFactory.decodeStream(fis, null, o); fis.close(); int scale = 1; if (o.outHeight > IMAGE_MAX_SIZE || o.outWidth > IMAGE_MAX_SIZE) { scale = Math.pow(2, (int) Math.round(Math.log(IMAGE_MAX_SIZE / (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5))); } //Decode with inSampleSize BitmapFactory.Options o2 = new BitmapFactory.Options(); o2.inSampleSize = scale; fis = new FileInputStream(f); b = BitmapFactory.decodeStream(fis, null, o2); fis.close(); } catch (FileNotFoundException e) { } return b;}
++++++++++++++++++++++++++++++++++++++
InputStream is = getResources().openRawResource(R.drawable.icon);Bitmap mBitmap = BitmapFactory.decodeStream(is);Paint mPaint = new Paint();canvas.drawBitmap(mBitmap, 40, 40, mPaint);
0 0
