如何在上传之前压缩图像大小，这是我的代码 我想先压缩图片大小，然后再上传到WordPress网站 我在我的Android应用中使用WordPress rest API 我如何在上传之前压缩图像大小，这是我的代码 我想先压缩图片大小，然后再上传到WordPress网站 我在Android应用中使用WordPress rest API
// getting images selected from gallery for post and sending them to server
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case FilePickerConst.REQUEST_CODE_PHOTO:
if (resultCode == Activity.RESULT_OK && data != null) {
imagePaths = new ArrayList<>();
imageRequestCount = 1;
imagePaths.addAll(data.getStringArrayListExtra(FilePickerConst.KEY_SELECTED_MEDIA));
if (SettingsMain.isConnectingToInternet(context)) {
if (imagePaths.size() > 0) {
btnSelectPix.setEnabled(false);
AsyncImageTask asyncImageTask = new AsyncImageTask();
asyncImageTask.execute(imagePaths);
}
}
} else {
btnSelectPix.setEnabled(true);
Toast.makeText(context, settingsMain.getAlertDialogMessage("internetMessage"), Toast.LENGTH_SHORT).show();
}
break;
}
}
private void adforest_uploadImages(List<MultipartBody.Part> parts) {
Log.d("info image parts", parts.toString());
String ad_id = Integer.toString(addId);
RequestBody adID =
RequestBody.create(
okhttp3.MultipartBody.FORM, ad_id);
Log.d("info SendImage", addId + "");
final Call<ResponseBody> req = restService.postUploadImage(adID, parts, UrlController.UploadImageAddHeaders(context));
req.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
if (response.isSuccessful()) {
Log.v("info Upload", response.toString());
JSONObject responseobj = null;
try {
responseobj = new JSONObject(response.body().string());
Log.d("info UploadImage object", "" + responseobj.getJSONObject("data").toString());
if (responseobj.getBoolean("success")) {
adforest_updateImages(responseobj.getJSONObject("data"));
int selectedImageSize = imagePaths.size();
int totalSize = currentSize + selectedImageSize;
Log.d("info image2", "muImage" + totalSize + "imagePaths" + totalUploadedImages);
if (totalSize == totalUploadedImages) {
adforest_UploadSuccessImage();
imagePaths.clear();
paths.clear();
if (allFile.size() > 0) {
for (File file : allFile) {
if (file.exists()) {
if (file.delete()) {
Log.d("file Deleted :", file.getPath());
} else {
Log.d("file not Deleted :", file.getPath());
}
}
}
}
}
} else {
adforest_UploadFailedImage();
Toast.makeText(context, responseobj.get("message").toString(), Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
adforest_UploadFailedImage();
e.printStackTrace();
} catch (IOException e) {
adforest_UploadFailedImage();
e.printStackTrace();
}
btnSelectPix.setEnabled(true);
} else {
adforest_UploadFailedImage();
}
}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
Log.e("info Upload Image Err:", t.toString());
if (t instanceof TimeoutException) {
adforest_UploadFailedImage();
// adforest_requestForImages();
}
if (t instanceof SocketTimeoutException) {
adforest_UploadFailedImage();
// adforest_requestForImages();
//
} else {
adforest_UploadFailedImage();
// adforest_requestForImages();
}
}
});
}
private void adforest_UploadFailedImage() {
progress_bar.setVisibility(View.GONE);
loadingLayout.setVisibility(View.GONE);
Gallary.setVisibility(View.VISIBLE);
Gallary.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_check_circle_black_24dp, 0, 0, 0);
Gallary.setText("" + 0);
Gallary.setTextColor(Color.parseColor("#a0a0a0"));
tv_done.setVisibility(View.VISIBLE);
tv_done.setTextColor(Color.parseColor("#ff0000"));
tv_done.setText(progressModel.getFailMessage());
btnSelectPix.setEnabled(true);
Toast.makeText(context, progressModel.getFailMessage(), Toast.LENGTH_SHORT).show();
}
private void adforest_UploadSuccessImage() {
progress_bar.setVisibility(View.GONE);
Gallary.setVisibility(View.VISIBLE);
loadingLayout.setVisibility(View.GONE);
Gallary.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_check_circle_green_24dp, 0, 0, 0);
Gallary.setText(totalFiles + "");
tv_done.setText(progressModel.getSuccessMessage());
Toast.makeText(context, progressModel.getSuccessMessage(), Toast.LENGTH_SHORT).show();
btnSelectPix.setEnabled(true);
tv_done.setTextColor(Color.parseColor("#20a406"));
}
private MultipartBody.Part adforestst_prepareFilePart(String fileName, Uri fileUri) {
File finalFile = new File(SettingsMain.getRealPathFromURI(context, fileUri));
allFile.add(finalFile);
// create RequestBody instance from file
RequestBody requestFile =
RequestBody.create(
MediaType.parse(getContentResolver().getType(fileUri)),
finalFile
);
// MultipartBody.Part is used to send also the actual file name
return MultipartBody.Part.createFormData(fileName, finalFile.getName(), requestFile);
}
private File adforest_rotateImage(String path) {
File file = null;
Bitmap bitmap = BitmapFactory.decodeFile(path);
ExifInterface ei = null;
try {
ei = new ExifInterface(path);
} catch (IOException e) {
e.printStackTrace();
}
int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_UNDEFINED);
Bitmap rotatedBitmap = null;
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
rotatedBitmap = rotateImage(bitmap, 90);
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotatedBitmap = rotateImage(bitmap, 180);
break;
case ExifInterface.ORIENTATION_ROTATE_270:
rotatedBitmap = rotateImage(bitmap, 270);
break;
case ExifInterface.ORIENTATION_NORMAL:
default:
rotatedBitmap = bitmap;
}
file = new File(getRealPathFromURI(getImageUri(rotatedBitmap)));
allFile.add(file);
return file;
}
public Uri getImageUri(Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
public String getRealPathFromURI(Uri uri) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
return cursor.getString(idx);
}
private class AsyncImageTask extends AsyncTask<ArrayList<String>, Void, List<MultipartBody.Part>> {
ArrayList<String> imaagesLis = null;
boolean checkDimensions = true, checkImageSize;
@SafeVarargs
@Override
protected final List<MultipartBody.Part> doInBackground(ArrayList<String>... params) {
List<MultipartBody.Part> parts = null;
imaagesLis = params[0];
totalFiles = imaagesLis.size();
for (int i = 0; i < imaagesLis.size(); i++) {
parts = new ArrayList<>();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss");
String currentDateandTime = sdf.format(new Date());
Log.d("info image", currentDateandTime);
checkDimensions = true;
checkImageSize = true;
if (adPostImageModel.getDim_is_show()) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(imaagesLis.get(i), options);
int imageWidth = options.outWidth;
int imageHeight = options.outHeight;
if (imageHeight > Integer.parseInt(adPostImageModel.getDim_height()) &&
imageWidth > Integer.parseInt(adPostImageModel.getDim_width())) {
checkDimensions = true;
} else {
checkDimensions = false;
runOnUiThread(() -> Toast.makeText(context, adPostImageModel.getDim_height_message(), Toast.LENGTH_SHORT).show());
}
}
File file = new File(imaagesLis.get(i));
long fileSizeInBytes = file.length();
Integer fileSizeBytes = Math.round(fileSizeInBytes);
if (fileSizeBytes > Integer.parseInt(adPostImageModel.getImg_size())) {
checkImageSize = false;
runOnUiThread(() -> Toast.makeText(context, adPostImageModel.getImg_message(), Toast.LENGTH_SHORT).show());
} else {
checkImageSize = true;
}
if (checkImageSize && checkDimensions) {
File finalFile1 = adforest_rotateImage(imaagesLis.get(i));
// File finalFile1 =new File(imaagesLis.get(i));
Uri tempUri = SettingsMain.decodeFile(context, finalFile1);
parts.add(adforestst_prepareFilePart("file" + i, tempUri));
adforest_uploadImages(parts);
}
}
return parts;
}
答案 0 :(得分：0)
您可以使用此按比例缩小功能
public static Bitmap scaleDown(Bitmap your_image, float YOUR_SIZE,boolean filter) { //filter false = Pixelated, true = Smooth
float ratio = Math.min( YOUR_SIZE/ your_image.getWidth(),
YOUR_SIZE/ your_image.getHeight());
int width = Math.round( ratio * your_image.getWidth());
int height = Math.round( ratio * your_image.getHeight());
Bitmap newBitmap = Bitmap.createScaledBitmap(your_image, width, height,
filter);
return newBitmap;
}
答案 1 :(得分：0)
您已经具有用于压缩代码的机制：
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
请参阅文档： https://developer.android.com/reference/android/graphics/Bitmap.html#public-methods_1
基本上，您需要将100更改为较小的数字才能压缩图像。