Bit地图 存到文件中

Bitmap 存到文件中

将一个Bitmap 的内容存到file中

//create a file to write bitmap dataFile f = File(context.getCacheDir(), filename);f.createNewFile();//Convert bitmap to byte arrayBitmap bitmap = your bitmap;ByteArrayOutputStream bos = new ByteArrayOutputStream();bitmap.compress(CompressFormat.PNG, 0 /*ignored for PNG*/, bos);byte[] bitmapdata = bos.toByteArray();//write the bytes in fileFileOutputStream fos = new FileOutputStream(f);fos.write(bitmapdata);