private Bitmap comp(Bitmap image) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
if (baos.toByteArray().length / 1024 > 1024) {
// 判断如果图片大于1M,进行压缩避免在生成图片（BitmapFactory.decodeStream）时溢出
baos.reset(); // 重置baos即清空baos
image.compress(Bitmap.CompressFormat.JPEG, 50, baos);
// 这里压缩50%，把压缩后的数据存放到baos中
}
ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());
BitmapFactory.Options newOpts = new BitmapFactory.Options();
// 开始读入图片，此时把options.inJustDecodeBounds 设回true了
newOpts.inJustDecodeBounds = true;
Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
newOpts.inJustDecodeBounds = false;
int w = newOpts.outWidth;
int h = newOpts.outHeight;
// 现在主流手机比较多是800*500分辨率，所以高和宽我们设置为
float hh = 800f; // 这里设置高度为800f
float ww = 500f; // 这里设置宽度为500f
// 缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可
int be = 1; // be=1表示不缩放
if (w > h && w > ww) { // 如果宽度大的话根据宽度固定大小缩放
be = (int) (newOpts.outWidth / ww);
} else if (w < h && h > hh) { // 如果高度高的话根据宽度固定大小缩放
be = (int) (newOpts.outHeight / hh);
}
if (be <= 0) be = 1;
newOpts.inSampleSize = be; // 设置缩放比例
// 重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
isBm = new ByteArrayInputStream(baos.toByteArray());
bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
return compressImage(bitmap); // 压缩好比例大小后再进行质量压缩
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
if (requestCode == REQUEST_CAMERA) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
imageBytes = bytes.toByteArray();
File destination =
new File(
Environment.getExternalStorageDirectory(), System.currentTimeMillis() + ".jpg");
FileOutputStream fo;
try {
destination.createNewFile();
fo = new FileOutputStream(destination);
fo.write(bytes.toByteArray());
fo.close();
} catch (IOException e) {
e.printStackTrace();
}
image.setImageBitmap(thumbnail);
} else if (requestCode == SELECT_FILE) {
Bitmap bitmap = data.getExtras().getParcelable("data");
image.setImageBitmap(bitmap);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
// Compress image to lower quality scale 1 - 100
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
imageBytes = stream.toByteArray();
}
uploadButton.setEnabled(true);
}
}
/**
* 将bitmap保存到本地
*
* @param mBitmap
* @param imagePath
*/
@SuppressLint("NewApi")
public static void saveBitmap(Bitmap bitmap, String imagePath, int s) {
File file = new File(imagePath);
createDipPath(imagePath);
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
if (imagePath.toLowerCase().endsWith(".png")) {
bitmap.compress(Bitmap.CompressFormat.PNG, s, fOut);
} else if (imagePath.toLowerCase().endsWith(".jpg")) {
bitmap.compress(Bitmap.CompressFormat.JPEG, s, fOut);
} else {
bitmap.compress(Bitmap.CompressFormat.WEBP, s, fOut);
}
try {
fOut.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
fOut.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public void selectProfilePicture(Intent data) {
Uri selectedImage = data.getData();
try {
Bitmap finalImage = ImageHandler.getPortraitImage(selectedImage, getActivity(), 300, 200);
profilePicture.setImageBitmap(finalImage);
Bitmap thumbNail = ImageHandler.getPortraitImage(selectedImage, getActivity(), 35, 23);
// http://stackoverflow.com/questions/26292969/can-i-store-image-files-in-firebase-using-java-api
ByteArrayOutputStream stream = new ByteArrayOutputStream();
finalImage.compress(Bitmap.CompressFormat.PNG, 100, stream);
String imageString = Base64.encodeToString(stream.toByteArray(), Base64.DEFAULT);
stream.reset();
thumbNail.compress(Bitmap.CompressFormat.PNG, 100, stream);
String thumbNString = Base64.encodeToString(stream.toByteArray(), Base64.DEFAULT);
MainActivity.getUser().setProfilePicture(imageString, stream.toByteArray());
stream.close();
new FbDataChange("/users/" + MainActivity.getUser().getUid() + "/profilePicture", imageString)
.execute();
new FbDataChange("/users/" + MainActivity.getUser().getUid() + "/profileThumb", thumbNString)
.execute();
} catch (IOException e) {
}
}
@Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
Bitmap BMP_MEAL_IMAGE;
if (imgSource == 1) {
BMP_MEAL_IMAGE = resizeCameraBitmap(bitmap);
imgvwAddPhoto.setImageBitmap(BMP_MEAL_IMAGE);
imgvwAddPhoto.setScaleType(AppCompatImageView.ScaleType.CENTER_CROP);
/** CONVERT THE BITMAP TO A BYTE ARRAY * */
ByteArrayOutputStream bos = new ByteArrayOutputStream();
BMP_MEAL_IMAGE.compress(Bitmap.CompressFormat.PNG, 100, bos);
MEAL_IMAGE = bos.toByteArray();
} else if (imgSource == 2) {
imgvwAddPhoto.setImageBitmap(bitmap);
imgvwAddPhoto.setScaleType(AppCompatImageView.ScaleType.CENTER_CROP);
/** CONVERT THE BITMAP TO A BYTE ARRAY * */
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, bos);
MEAL_IMAGE = bos.toByteArray();
}
}
/**
* 将位图保存到指定路径
*
* @param bm
* @param path
*/
public static String save(Bitmap bm, String path) {
File file = null;
if (bm != null && path != null) {
file = new File(path);
// 如果父目录不存在，创建父目录
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs();
}
try {
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
FileOutputStream out = new FileOutputStream(file);
// 获取拓展名
String filename = file.getName();
String ext = filename.substring(filename.lastIndexOf(".") + 1, filename.length());
if ("jpg".equalsIgnoreCase(ext) || "jpeg".equalsIgnoreCase(ext)) {
bm.compress(CompressFormat.JPEG, 100, out);
} else {
bm.compress(CompressFormat.PNG, 100, out);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
return file.getAbsolutePath();
}
private void saveScreenshot(Bitmap bitmap, String format, String fileName, Integer quality) {
try {
File folder = new File(Environment.getExternalStorageDirectory(), "Pictures");
if (!folder.exists()) {
folder.mkdirs();
}
File f = new File(folder, fileName + "." + format);
FileOutputStream fos = new FileOutputStream(f);
if (format.equals("png")) {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
} else if (format.equals("jpg")) {
bitmap.compress(Bitmap.CompressFormat.JPEG, quality == null ? 100 : quality, fos);
}
JSONObject jsonRes = new JSONObject();
jsonRes.put("filePath", f.getAbsolutePath());
PluginResult result = new PluginResult(PluginResult.Status.OK, jsonRes);
mCallbackContext.sendPluginResult(result);
scanPhoto(f.getAbsolutePath());
fos.close();
} catch (JSONException e) {
mCallbackContext.error(e.getMessage());
} catch (IOException e) {
mCallbackContext.error(e.getMessage());
}
}
public static File saveBitmap(Bitmap bmp, String id, Context context) {
File file = getFile(id, context);
if (!file.exists() && !file.isDirectory()) {
try {
FileOutputStream out = new FileOutputStream(file);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int quality = 100;
bmp.compress(Bitmap.CompressFormat.PNG, quality, baos);
Log.d("图片压缩前大小：" + baos.toByteArray().length / 1024 + "kb");
if (baos.toByteArray().length / 1024 > 50) {
quality = 80;
baos.reset();
bmp.compress(Bitmap.CompressFormat.PNG, quality, baos);
Log.d("质量压缩到原来的" + quality + "%时大小为：" + baos.toByteArray().length / 1024 + "kb");
}
Log.d("图片压缩后大小：" + baos.toByteArray().length / 1024 + "kb");
baos.writeTo(out);
baos.flush();
baos.close();
out.close();
// bmp.compress(Bitmap.CompressFormat.JPEG, 100, out);
} catch (Exception e) {
e.printStackTrace();
}
}
return file;
}
/**
* 压缩图片大小
*
* @param bitmap 图片
* @param maxSize 压缩最大大小
* @return
*/
public static Bitmap compressImage(Bitmap bitmap, double maxSize) {
// 图片允许最大空间 单位：KB
// double maxSize = 100.00;
int option = 100;
// 将bitmap放至数组中，意在bitmap的大小（与实际读取的原文件要大）
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, option, baos);
byte[] b = baos.toByteArray();
// 将字节换成KB
double mid = b.length / 1024;
// 判断bitmap占用空间是否大于允许最大空间 如果大于则压缩 小于则不压缩
while (mid > maxSize) {
baos.reset();
option -= 10;
bitmap.compress(Bitmap.CompressFormat.JPEG, option, baos);
mid = baos.toByteArray().length / 1024;
if (option == 30) {
break;
}
}
ByteArrayInputStream isBm =
new ByteArrayInputStream(baos.toByteArray()); // 把压缩后的数据baos存放到ByteArrayInputStream中
bitmap = BitmapFactory.decodeStream(isBm, null, null); // 把ByteArrayInputStream数据生成图片
if (mid > maxSize) {
double i = mid / maxSize;
return zoomImage(bitmap, bitmap.getWidth() / Math.sqrt(i), bitmap.getHeight() / Math.sqrt(i));
}
return bitmap;
}
/**
* 尺寸和大小都压缩 ,压缩到一兆 尺寸压缩有待验证
*
* @param src
* @param height
* @param width
* @return
*/
public static Bitmap compressImage(Bitmap src, int height, int width) {
if (src == null) {
return null;
}
Bitmap scaledBitmap = Bitmap.createScaledBitmap(src, width, height, false);
int compress = 90;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
scaledBitmap.compress(
Bitmap.CompressFormat.JPEG, compress, baos); // 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中
while (baos.toByteArray().length > 100 * 1024) {
baos.reset(); // 重置baos即清空baos
scaledBitmap.compress(
Bitmap.CompressFormat.JPEG, compress, baos); // 这里压缩options%，把压缩后的数据存放到baos中
compress -= 10; // 每次都减少10
if (compress <= 0) {
break;
}
}
ByteArrayInputStream isBm =
new ByteArrayInputStream(baos.toByteArray()); // 把压缩后的数据baos存放到ByteArrayInputStream中
Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null); // 把ByteArrayInputStream数据生成图片
try {
baos.close();
isBm.close();
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}
private String encodeAndScaleImage(String imagePath) {
Bitmap original = BitmapFactory.decodeFile(imagePath);
if (original == null) return null;
// the smallest size has to be constant
// the other size should scale accordingly
int width = original.getWidth();
int height = original.getHeight();
if (width <= height) {
float ratio = (float) height / (float) width;
width = Consts.THUMB_MIN_SIZE;
height = (int) (width * ratio);
} else {
float ratio = (float) height / (float) width;
height = Consts.THUMB_MIN_SIZE;
width = (int) (height * ratio);
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
// if image is larger than 1024px X 1024px (by longest side)
if (!(original.getWidth() < Consts.THUMB_MIN_SIZE
|| original.getHeight() < Consts.THUMB_MIN_SIZE)) {
// resize picture to 1024px X 1024px (by longest side)
Bitmap scaledBitmap = Bitmap.createScaledBitmap(original, width, height, true);
scaledBitmap.compress(Bitmap.CompressFormat.JPEG, 90, baos);
} else original.compress(Bitmap.CompressFormat.JPEG, 90, baos);
byte[] byteArrayImage = baos.toByteArray();
return Base64.encodeToString(byteArrayImage, Base64.DEFAULT);
}
// 同比缩放解决方案---图片按比例大小压缩方法（根据Bitmap图片压缩）
public static Bitmap compressByBitmap(
Bitmap srcBitmap, int dstWidth, int dstHeight, int sizeInKb, ScalingLogic scalingLogic) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
srcBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
int quality = 100;
while (baos.toByteArray().length / 1024
> 1024) { // 判断如果图片大于1M,进行压缩避免在生成图片（BitmapFactory.decodeStream）时溢出
baos.reset(); // 重置baos即清空baos
srcBitmap.compress(Bitmap.CompressFormat.JPEG, quality, baos); // 这里压缩quality%，把压缩后的数据存放到baos中
quality -= 10; // 每次都减少10
}
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
BitmapFactory.Options options = new BitmapFactory.Options();
// 开始读入图片，此时把options.inJustDecodeBounds 设回true了
options.inJustDecodeBounds = true;
Bitmap bitmap = BitmapFactory.decodeStream(bais, null, options);
int inSampleSize =
calculateSampleSize(options.outWidth, options.outHeight, dstWidth, dstHeight, scalingLogic);
options.inSampleSize = inSampleSize > 0 ? inSampleSize : 1; // 设置缩放比例
options.inJustDecodeBounds = false;
options.inPreferredConfig = Bitmap.Config.RGB_565;
options.inPurgeable = true;
options.inInputShareable = true;
// 重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
bais = new ByteArrayInputStream(baos.toByteArray());
bitmap = BitmapFactory.decodeStream(bais, null, options);
return compressImage(bitmap, sizeInKb); // 压缩好比例大小后再进行质量压缩
}
/** 压缩图片, 成为Base64 String */
public static String compressPic(Bitmap oriBitmap) {
int wid = oriBitmap.getWidth(), hgt = oriBitmap.getHeight();
// System.out.println("w="+wid+",h="+hgt);
Bitmap rb = null;
if (wid > 800 || hgt > 800) {
float max = 800;
float scale;
if (wid > hgt) {
scale = max / wid;
} else {
scale = max / hgt;
}
Matrix matrix = new Matrix();
matrix.postScale(scale, scale); // 参数为比率
rb = Bitmap.createBitmap(oriBitmap, 0, 0, wid, hgt, matrix, true);
} else rb = oriBitmap;
ByteArrayOutputStream bStream = new ByteArrayOutputStream();
int prs = 100;
rb.compress(CompressFormat.JPEG, 100, bStream);
while (bStream.toByteArray().length > 1024 * 100 && prs > 0) { // 大于100k
prs -= 10;
bStream.reset();
rb.compress(CompressFormat.JPEG, prs, bStream);
}
// System.out.println(bStream.toByteArray().length);
String s = Base64.encodeToString(bStream.toByteArray(), Base64.DEFAULT);
return s;
}
private String saveBitmap(
Context context, Bitmap bmp, int type, String dir, String fileName, Boolean isCover) {
if (bmp == null) {
return null;
}
String picPath = null;
picPath = dir + "/" + fileName;
// 判断文件夹是否存在
File picFile = new File(dir);
if (!picFile.exists()) {
picFile.mkdir();
}
File file = new File(picPath);
if (file.exists()) {
if (isCover) {
file.delete();
} else {
return picPath;
}
}
try {
file.createNewFile();
} catch (IOException e1) {
return null;
}
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(file);
switch (type) {
case JPG:
bmp.compress(Bitmap.CompressFormat.JPEG, 100, fOut);
break;
default:
bmp.compress(Bitmap.CompressFormat.PNG, 100, fOut);
break;
}
} catch (FileNotFoundException e) {
Log.e(TAG, e.getMessage());
}
try {
fOut.flush();
} catch (IOException e) {
Log.e(TAG, e.getMessage());
}
try {
fOut.close();
} catch (IOException e) {
Log.e(TAG, e.getMessage());
}
return picPath;
}
/**
* Saves a file.
*
* @param name the name of the file
* @param b the bitmap to save
* @param quality the compression rate. From 0 (compress for lowest size) to 100 (compress for
* maximum quality).
*/
private void saveFile(String name, Bitmap b, int quality) {
FileOutputStream fos = null;
String fileName = getFileName(name);
File directory = new File(config.screenshotSavePath);
directory.mkdir();
File fileToSave = new File(directory, fileName);
try {
fos = new FileOutputStream(fileToSave);
if (config.screenshotFileType == ScreenshotFileType.JPEG) {
if (b.compress(Bitmap.CompressFormat.JPEG, quality, fos) == false) {
Log.d(LOG_TAG, "Compress/Write failed");
}
} else {
if (b.compress(Bitmap.CompressFormat.PNG, quality, fos) == false) {
Log.d(LOG_TAG, "Compress/Write failed");
}
}
fos.flush();
fos.close();
} catch (Exception e) {
Log.d(
LOG_TAG,
"Can't save the screenshot! Requires write permission (android.permission.WRITE_EXTERNAL_STORAGE) in AndroidManifest.xml of the application under test.");
e.printStackTrace();
}
}
private static void revitionImageSize(String picfile, int size, int quality)
throws IOException {
if (size <= 0) {
throw new IllegalArgumentException("size must be greater than 0!");
}
if (!doesExisted(picfile)) {
throw new FileNotFoundException(picfile == null ? "null" : picfile);
}
if (!BitmapHelper.verifyBitmap(picfile)) {
throw new IOException("");
}
FileInputStream input = new FileInputStream(picfile);
final BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inJustDecodeBounds = true;
BitmapFactory.decodeStream(input, null, opts);
try {
input.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
int rate = 0;
for (int i = 0; ; i++) {
if ((opts.outWidth >> i <= size) && (opts.outHeight >> i <= size)) {
rate = i;
break;
}
}
opts.inSampleSize = (int) Math.pow(2, rate);
opts.inJustDecodeBounds = false;
Bitmap temp = safeDecodeBimtapFile(picfile, opts);
if (temp == null) {
throw new IOException("Bitmap decode error!");
}
deleteDependon(picfile);
makesureFileExist(picfile);
final FileOutputStream output = new FileOutputStream(picfile);
if (opts != null && opts.outMimeType != null && opts.outMimeType.contains("png")) {
temp.compress(Bitmap.CompressFormat.PNG, quality, output);
} else {
temp.compress(Bitmap.CompressFormat.JPEG, quality, output);
}
try {
output.close();
} catch (Exception e) {
e.printStackTrace();
}
temp.recycle();
}
public static byte[] bitmapToByteArray(Bitmap bitmap, int compressQuality) {
ByteArrayOutputStream localByteArrayOutputStream = new ByteArrayOutputStream();
if (bitmap.hasAlpha()) {
bitmap.compress(Bitmap.CompressFormat.PNG, compressQuality, localByteArrayOutputStream);
} else {
bitmap.compress(Bitmap.CompressFormat.JPEG, compressQuality, localByteArrayOutputStream);
}
byte[] result = localByteArrayOutputStream.toByteArray();
IOUtils.closeQuietly(localByteArrayOutputStream);
return result;
}
// 根据路径获得图片并压缩
public static String getSmallImgePath(Context context, String filePath) {
if (filePath == null || filePath.length() == 0) {
return "";
}
String endStr = filePath.substring(filePath.lastIndexOf("."), filePath.length());
File file = null;
try {
int degree = readPictureDegree(filePath);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, options);
int inSampleSize = calculateInSampleSize(options, 480, 800);
if (inSampleSize >= 4) {
inSampleSize++;
}
options.inSampleSize = inSampleSize;
options.inJustDecodeBounds = false;
Bitmap bm = BitmapFactory.decodeFile(filePath, options);
if (degree != 0) {
bm = rotaingImage(degree, bm);
}
if (bm != null) {
int width = Math.min(bm.getWidth(), bm.getHeight());
bm = centerSquareScaleBitmap(bm, width);
file = new File(context.getCacheDir() + "/temp" + System.currentTimeMillis() + endStr);
FileOutputStream fileOutputStream = new FileOutputStream(file);
if (endStr.equalsIgnoreCase(".png")) {
bm.compress(Bitmap.CompressFormat.PNG, 80, fileOutputStream);
} else {
bm.compress(Bitmap.CompressFormat.JPEG, 80, fileOutputStream);
}
fileOutputStream.close();
bm.recycle();
}
} catch (Exception e) {
e.printStackTrace();
}
if (file != null) {
return file.getAbsolutePath();
}
return null;
}
/**
* Executes the request and returns PluginResult.
*
* @param action The action to execute.
* @param args JSONArry of arguments for the plugin.
* @param callbackId The callback id used when calling back into JavaScript.
* @return A PluginResult object with a status and message.
*/
@Override
public boolean execute(String action, JSONArray args, CallbackContext callbackContext) {
try {
if (action.equals("createVideoThumbnail")) {
String pvUrl = args.getString(0);
if (pvUrl != null && pvUrl.length() > 0) {
// do smth with pvUrl
// MINI_KIND: 512 x 384 thumbnail
Bitmap bmThumbnail = ThumbnailUtils.createVideoThumbnail(pvUrl, Thumbnails.MINI_KIND);
try {
FileOutputStream out = new FileOutputStream(pvUrl + ".jpg");
bmThumbnail.compress(Bitmap.CompressFormat.JPEG, 55, out);
// File file = new File(pvUrl + ".jpg");
// boolean val = file.exists();
} catch (Exception e) {
e.printStackTrace();
}
callbackContext.success(pvUrl + ".jpg");
return true;
}
} else {
if (action.equals("createImageThumbnail")) {
String pvUrl = args.getString(0);
if (pvUrl != null && pvUrl.length() > 0) {
// do smth with pvUrl
Bitmap bitmap = BitmapFactory.decodeFile(pvUrl);
Bitmap bmThumbnail = ThumbnailUtils.extractThumbnail(bitmap, 512, 384);
try {
FileOutputStream out = new FileOutputStream(pvUrl + ".jpg");
bmThumbnail.compress(Bitmap.CompressFormat.JPEG, 55, out);
} catch (Exception e) {
e.printStackTrace();
}
callbackContext.success(pvUrl + ".jpg");
return true;
}
}
}
} catch (JSONException e) {
}
return false;
}
// 图片质量压缩方法
private static Bitmap compressImage(Bitmap image) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG, 100, baos); // 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中
int options = 100;
while (baos.toByteArray().length / 1024 > 50) { // 循环判断如果压缩后图片是否大于50kb,大于继续压缩
baos.reset(); // 重置baos即清空baos
options -= 10; // 每次都减少10
image.compress(Bitmap.CompressFormat.JPEG, options, baos); // 这里压缩options%，把压缩后的数据存放到baos中
}
ByteArrayInputStream isBm =
new ByteArrayInputStream(baos.toByteArray()); // 把压缩后的数据baos存放到ByteArrayInputStream中
Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null); // 把ByteArrayInputStream数据生成图片
return bitmap;
}
/**
* 图片质量压缩
*
* @param srcBitmap
* @param sizeInKb
* @return
*/
public static Bitmap compressImage(Bitmap srcBitmap, int sizeInKb) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
srcBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); // 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中
int options = 100;
while (baos.toByteArray().length / 1024 > sizeInKb) { // 循环判断如果压缩后图片是否大于100kb,大于继续压缩
baos.reset(); // 重置baos即清空baos
srcBitmap.compress(Bitmap.CompressFormat.JPEG, options, baos); // 这里压缩options%，把压缩后的数据存放到baos中
options -= 10; // 每次都减少10
}
ByteArrayInputStream bais =
new ByteArrayInputStream(baos.toByteArray()); // 把压缩后的数据baos存放到ByteArrayInputStream中
Bitmap bitmap = BitmapFactory.decodeStream(bais, null, null); // 把ByteArrayInputStream数据生成图片
return bitmap;
}
public void testValues() {
CompressFormat[] comFormat = CompressFormat.values();
assertEquals(3, comFormat.length);
assertEquals(CompressFormat.JPEG, comFormat[0]);
assertEquals(CompressFormat.PNG, comFormat[1]);
assertEquals(CompressFormat.WEBP, comFormat[2]);
// CompressFormat is used as a argument here for all the methods that use it
Bitmap b = Bitmap.createBitmap(10, 24, Config.ARGB_8888);
assertTrue(b.compress(CompressFormat.JPEG, 24, new ByteArrayOutputStream()));
assertTrue(b.compress(CompressFormat.PNG, 24, new ByteArrayOutputStream()));
assertTrue(b.compress(CompressFormat.WEBP, 24, new ByteArrayOutputStream()));
}
/**
* 通过降低图片的质量来压缩图片
*
* @param bmp 要压缩的图片
* @param maxSize 压缩后图片大小的最大值,单位KB
* @return 压缩后的图片
*/
public static Bitmap compressByQuality(Bitmap bitmap, int maxSize) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int quality = 100;
bitmap.compress(CompressFormat.JPEG, quality, baos);
System.out.println("图片压缩前大小：" + baos.toByteArray().length + "byte");
while (baos.toByteArray().length / 1024 > maxSize) {
quality -= 10;
baos.reset();
bitmap.compress(CompressFormat.JPEG, quality, baos);
System.out.println("质量压缩到原来的" + quality + "%时大小为：" + baos.toByteArray().length + "byte");
}
System.out.println("图片压缩后大小：" + baos.toByteArray().length + "byte");
bitmap = BitmapFactory.decodeByteArray(baos.toByteArray(), 0, baos.toByteArray().length);
return bitmap;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == 0) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
File destination =
new File(
Environment.getExternalStorageDirectory(), System.currentTimeMillis() + ".jpg");
FileOutputStream fo;
try {
destination.createNewFile();
fo = new FileOutputStream(destination);
fo.write(bytes.toByteArray());
fo.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
btnImage.setImageBitmap(thumbnail);
} else if (requestCode == 1) {
Uri selectedImageUri = data.getData();
String[] projection = {MediaStore.MediaColumns.DATA};
Cursor cursor = managedQuery(selectedImageUri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
cursor.moveToFirst();
String selectedImagePath = cursor.getString(column_index);
Bitmap bm;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(selectedImagePath, options);
final int REQUIRED_SIZE = 200;
int scale = 1;
while (options.outWidth / scale / 2 >= REQUIRED_SIZE
&& options.outHeight / scale / 2 >= REQUIRED_SIZE) scale *= 2;
options.inSampleSize = scale;
options.inJustDecodeBounds = false;
bm = BitmapFactory.decodeFile(selectedImagePath, options);
btnImage.setImageBitmap(bm);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, stream);
image = stream.toByteArray();
}
}
}
// convert bitmap to base64
public static String bitmapToBase64(Bitmap bitmap) {
String result = null;
ByteArrayOutputStream baos = null;
try {
if (bitmap != null) {
baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
baos.flush();
baos.close();
byte[] bitmapBytes = baos.toByteArray();
result = Base64.encodeToString(bitmapBytes, Base64.DEFAULT);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (baos != null) {
baos.flush();
baos.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
private void saveBmpToSd(Bitmap bm, String url) {
if (bm == null) {
Log.w(TAG, " trying to savenull bitmap");
return;
}
// 判断sdcard上的空间
// if (FREE_SD_SPACE_NEEDED_TO_CACHE >freeSpaceOnSd()) {
// Log.w(TAG, "Low free space onsd, do not cache");
// return;
// }
File file = new File(Environment.getExternalStorageDirectory() + "/cache/" + MD5(url) + ".jpg");
try {
file.createNewFile();
OutputStream outStream = new FileOutputStream(file);
bm.compress(Bitmap.CompressFormat.JPEG, 100, outStream);
outStream.flush();
outStream.close();
Log.i(TAG, "Image saved tosd");
} catch (FileNotFoundException e) {
Log.w(TAG, "FileNotFoundException");
} catch (IOException e) {
Log.w(TAG, "IOException");
}
}
private byte[] convertImage(int resImage) {
Bitmap bitmap = BitmapFactory.decodeResource(getActivity().getResources(), resImage);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 80, stream);
// bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
return stream.toByteArray();
}
@Override
public void shortcutPicked(String uri, String friendlyName, Bitmap bmp, boolean isApplication) {
NavBarButton button = mButtons.get(mPendingButton);
boolean longpress = button.getPickLongPress();
if (!longpress) {
button.setClickAction(uri);
if (bmp == null) {
button.setIconURI("");
} else {
String iconName = getIconFileName(mPendingButton);
FileOutputStream iconStream = null;
try {
iconStream = mContext.openFileOutput(iconName, Context.MODE_WORLD_READABLE);
} catch (FileNotFoundException e) {
return; // NOOOOO
}
bmp.compress(Bitmap.CompressFormat.PNG, 100, iconStream);
button.setIconURI(Uri.fromFile(mContext.getFileStreamPath(iconName)).toString());
}
} else {
button.setLongPress(uri);
}
refreshButtons();
}
public void onPictureTaken(byte[] data, Camera arg1) {
if (data != null) {
PictureTaken = true;
// Extract the bitmap from data
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
// Only select the region we want
bitmap =
ThumbnailUtils.extractThumbnail(
bitmap, bitmap.getWidth() / 9, bitmap.getHeight() / 3);
// Rotate the bitmap
Matrix matrix = new Matrix();
matrix.postRotate(90);
bitmap =
Bitmap.createBitmap(
bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
// Convert it back to byte array data
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] bmArray = stream.toByteArray(); // Get the underlying pixel bytes array
image = bmArray;
if (image != null) {
Toast.makeText(getActivity(), "Photo Taken", Toast.LENGTH_SHORT).show();
}
}
cameraObject.startPreview();
}
private void saveMyBitmap() {
try {
Bitmap bitmap = mGesture.toBitmap(240, 75, 12, Color.RED);
// mImageView.setImageBitmap(bitmap);
if(path == null || path.equals("") || path.equals("null")){
path = Environment.getExternalStorageDirectory().toString();
}
Log.e("?????", path);
File destDir = new File(path);
if (!destDir.exists()) {
destDir.mkdirs();
}
String name = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date())
+ ".png";// 照片命名
this.pathAndName = path + "/"+name;
File f = new File(pathAndName);
FileOutputStream fos = null;
fos = new FileOutputStream(f);
bitmap.compress(Bitmap.CompressFormat.PNG, 50, fos);
Toast.makeText(getApplicationContext(), "保存成功", 5000).show();
} catch (Exception e) {
// TODO Auto-generated catch block
Log.e("Exception", e.getMessage());
e.printStackTrace();
}
}
