Base64工具类（文件、base64字符串、Bitmap相互转换）

马上吃饭了，懒得写太多了，先对付看吧

/*** Author : 马占柱* E-mail : mazhanzhu_3351@163.com* Time   : 2019/5/19 9:30* Desc   : Base64工具类*/
public class Base64Util {public static final String TAG = "Base64Util";private static final char last2byte = (char) Integer.parseInt("00000011", 2);private static final char last4byte = (char) Integer.parseInt("00001111", 2);private static final char last6byte = (char) Integer.parseInt("00111111", 2);private static final char lead6byte = (char) Integer.parseInt("11111100", 2);private static final char lead4byte = (char) Integer.parseInt("11110000", 2);private static final char lead2byte = (char) Integer.parseInt("11000000", 2);private static final char[] encodeTable = new char[]{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'};//取到 SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据public static String Mzz_File = BaseApplication.getContext().getExternalCacheDir().getAbsolutePath();public static void gcBitmap(Bitmap bitmap) {if (bitmap != null && !bitmap.isRecycled()) {bitmap.recycle(); // 回收图片所占的内存bitmap = null;System.gc(); // 提醒系统及时回收}}/*** Bitmap To Base64*/public static String bitmapToBase64(Bitmap bitmap) {// 要返回的字符串String reslut = null;ByteArrayOutputStream baos = null;try {if (bitmap != null) {baos = new ByteArrayOutputStream();//压缩只对保存有效果bitmap还是原来的大小bitmap.compress(Bitmap.CompressFormat.JPEG, 30, baos);baos.flush();baos.close();// 转换为字节数组byte[] byteArray = baos.toByteArray();// 转换为字符串reslut = Base64.encodeToString(byteArray, Base64.NO_WRAP);} else {return null;}} catch (IOException e) {e.printStackTrace();} finally {try {if (baos != null) {baos.close();}} catch (IOException e) {e.printStackTrace();}}return reslut;}/*** Bitmap To Bitmap*/public static Bitmap base64ToBitmap(String base64String) {byte[] decode = Base64.decode(base64String, Base64.DEFAULT);Bitmap bitmap = BitmapFactory.decodeByteArray(decode, 0, decode.length);return bitmap;}/*** Bitmap 转化为 二维数组*/public static byte[] getBytesByBitmap(Bitmap bitmap) {try {ByteArrayOutputStream outputStream = new ByteArrayOutputStream(bitmap.getByteCount());bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream);return outputStream.toByteArray();} catch (Exception e) {return new byte[10];}}/*** 文件 转 base64字符串*/public static String fileToBase64(File file) {String base64 = null;try {InputStream in = new FileInputStream(file);byte[] bytes = new byte[in.available()];int length = in.read(bytes);base64 = Base64.encodeToString(bytes, 0, length, Base64.DEFAULT);in.close();} catch (Exception e) {}return base64;}/*** Bitmap 转 文件*/public static File bitmapToFile(Bitmap bitmap) {ByteArrayOutputStream baos = new ByteArrayOutputStream();//第二个参数是压缩比重，图片存储在磁盘上的大小会根据这个值变化。值越小存储在磁盘的图片文件越小，bitmap.compress(Bitmap.CompressFormat.JPEG, 50, baos);File fileDir = new File(Base64Util.Mzz_File);if (!fileDir.exists()) {fileDir.mkdirs();}File file = new File(Mzz_File, System.currentTimeMillis() + "压缩图片_Mzz.jpg");try {FileOutputStream fos = new FileOutputStream(file);InputStream is = new ByteArrayInputStream(baos.toByteArray());int x = 0;byte[] b = new byte[1024 * 100];while ((x = is.read(b)) != -1) {fos.write(b, 0, x);}fos.close();} catch (Exception e) {Log_Ma.e(TAG, e.toString());e.printStackTrace();}return file;}public static String encode(byte[] from) {StringBuilder to = new StringBuilder((int) ((double) from.length * 1.34D) + 3);int num = 0;char currentByte = 0;int i;for (i = 0; i < from.length; ++i) {for (num %= 8; num < 8; num += 6) {switch (num) {case 0:currentByte = (char) (from[i] & lead6byte);currentByte = (char) (currentByte >>> 2);case 1:case 3:case 5:default:break;case 2:currentByte = (char) (from[i] & last6byte);break;case 4:currentByte = (char) (from[i] & last4byte);currentByte = (char) (currentByte << 2);if (i + 1 < from.length) {currentByte = (char) (currentByte | (from[i + 1] & lead2byte) >>> 6);}break;case 6:currentByte = (char) (from[i] & last2byte);currentByte = (char) (currentByte << 4);if (i + 1 < from.length) {currentByte = (char) (currentByte | (from[i + 1] & lead4byte) >>> 4);}}to.append(encodeTable[currentByte]);}}if (to.length() % 4 != 0) {for (i = 4 - to.length() % 4; i > 0; --i) {to.append("=");}}return to.toString();}/*** @param key      加密秘钥* @param filepath 源文件地址*/public static Map<String, String> IMG_Jiami(int key, String filepath) {File fileDir = new File(Base64Util.Mzz_File);if (!fileDir.exists()) {fileDir.mkdirs();}File file = new File(fileDir, System.currentTimeMillis() + "_Mzz.jpg");String path_jiami;long available = 0;try {BufferedInputStream bis = new BufferedInputStream(new FileInputStream(filepath));available = bis.available();BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file.getPath()));int b;while ((b = bis.read()) != -1) {bos.write(b ^ key);}path_jiami = file.getPath();bis.close();bos.close();} catch (Exception e) {path_jiami = filepath;}Map<String, String> map = new HashMap<>();map.put("path", path_jiami);map.put("size", available + "");return map;}/*** 获取视频封面*/public static Bitmap getVideoThumb(String path) {MediaMetadataRetriever media = new MediaMetadataRetriever();media.setDataSource(path);return media.getFrameAtTime();}/*** 获取视频时长*/public static long getLocalVideoDuration(String videoPath) {int duration;try {MediaMetadataRetriever mmr = new MediaMetadataRetriever();mmr.setDataSource(videoPath);duration = Integer.parseInt(mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));} catch (Exception e) {e.printStackTrace();return 0;}return duration;}/*** @return view的截图，在InVisible时也可以获取到bitmap*/public static Bitmap getViewBitmap(View view) {view.measure(View.MeasureSpec.makeMeasureSpec(view.getMeasuredWidth(), View.MeasureSpec.EXACTLY),View.MeasureSpec.makeMeasureSpec(view.getMeasuredHeight(), View.MeasureSpec.EXACTLY));view.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);view.setDrawingCacheEnabled(true);view.buildDrawingCache(true);return view.getDrawingCache(true);}/*** 获取系统相册文件路径*/public static File getDCIMDirectory() {File dcim = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);if (!dcim.exists()) {dcim = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);}return dcim;}/*** 根据绝对路径得到图片的宽高，亲测比楼上速度快几十倍** @param path 绝对路径！绝对路径！绝对路径！* @return 宽高*/public static int[] getImageWidthHeight(String path) {try {BitmapFactory.Options options = new BitmapFactory.Options();options.inJustDecodeBounds = true;BitmapFactory.decodeFile(path, options);return new int[]{options.outWidth, options.outHeight};} catch (Exception e) {e.printStackTrace();}return new int[]{0, 0};}/*** 根据相对路径获取图片宽高** @param c   上下文* @param uri 图片uri地址* @return 宽高信息*/public static int[] getImageWidthHeight(Context c, Uri uri) {try {ParcelFileDescriptor parcelFileDescriptor = c.getContentResolver().openFileDescriptor(uri, "r");if (parcelFileDescriptor != null) {FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);parcelFileDescriptor.close();return new int[]{image.getWidth(), image.getHeight()};}} catch (Exception e) {e.printStackTrace();}return new int[]{0, 0};}
}

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