我尝试在使用Firebase Storage库将其上传到SiliCompressor之前压缩图像，但似乎无效，ProgressDialog不会停止。我首先要做的是通过单击ImageButton从图库中选择图像到ImageButton。以下是我的代码。
imageSelect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent galleryIntent = new Intent(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/");
startActivityForResult(galleryIntent, GALLERY_REQUEST);
}
});
---------------------------------------------------------------------
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == GALLERY_REQUEST && resultCode == RESULT_OK) {
imageUri = data.getData();
// imageSelect.setImageBitmap(BitmapFactory.decodeFile(imageSelectFile.getAbsolutePath()));
// Compressor com = Compressor.getDefault(this).compressToFile(imageFile);
// imageSelect.setImageURI(imageUri);
Picasso.with(c).load(imageUri).fit().into(imageSelect);
}
}
所以现在我有了一个上传数据的方法startPosting()点击按钮到Firebase存储。
以下是我的代码。
private void startPosting() {
mProgress.setMessage("Uploading Image...");
//Compressing an Image ....
String stringUri= imageUri.toString();
Uri uri_image_final;
//String filePath = SiliCompressor.with(getApplicationContext()).compress(stringUri);
String filePath = SiliCompressor.with(getApplicationContext()).compress(stringUri, true);
uri_image_final = Uri.parse(filePath);
System.out.println("Whats here :" +
""+ uri_image_final);
final String title_val = mPostTitle.getText().toString().trim();
final String desc_val = mPostDesc.getText().toString().trim();
if (!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && filePath != null) {
mProgress.show();
StorageReference filepath = mStorage.child("BlogImages").child(uri_image_final.getLastPathSegment());
filepath.putFile(uri_image_final).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Uri downloadUri = taskSnapshot.getDownloadUrl();
DatabaseReference newPost = mDatabase.push();
DatabaseReference c = mDatabase.push();
newPost.child("EventTitle").setValue(title_val);
newPost.child("EventDescription").setValue(desc_val);
newPost.child("EventImage").setValue(downloadUri.toString());
newPost.child("PostId").setValue(c);
mProgress.dismiss();
startActivity(new Intent(PostActivity.this, MainActivity.class));
}
}
);
} else if (TextUtils.isEmpty(title_val) && TextUtils.isEmpty(desc_val) && imageUri != null) {
mProgress.show();
StorageReference filepath = mStorage.child("BlogImages").child(uri_image_final.getLastPathSegment());
filepath.putFile(uri_image_final).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Uri downloadUri = taskSnapshot.getDownloadUrl();
DatabaseReference newPost = mDatabase.push();
newPost.child("EventTitle").setValue("");
newPost.child("EventDescription").setValue("");
newPost.child("EventImage").setValue(downloadUri.toString());
mProgress.dismiss();
// startActivity(new Intent(PostActivity.this, MainActivity.class));
Intent load= new Intent(PostActivity.this,MainActivity.class);
load.putExtra(eventname,eventname);
startActivity(load);
}
}
);
}
else if (!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && imageUri== null){
Toast.makeText(getApplicationContext(),"Please insert an Image and Upload ! ",Toast.LENGTH_LONG).show();
}
}
现在，如果您在该方法中看到，我的本质是压缩在ImageButton中加载的图像，然后将其上传到firebase。
这是尝试压缩ImageButton中加载的图像的Silicon Compressor行。
String filePath = SiliCompressor.with(getApplicationContext()).compress(stringUri, true);
我从Github的这个链接获得了这个lib。 https://github.com/Tourenathan-G5organisation/SiliCompressor
所以，我错了，因为图片没有上传，但我希望它在压缩时上传。
答案 0 :(得分：5)
这是我写的，你可以试试。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == Constants.PICK_USER_PROFILE_IMAGE) {
if (resultCode == RESULT_OK) {
Bitmap bmp = ImagePicker.getImageFromResult(this, resultCode, data);//your compressed bitmap here
startPosting(bmp);
}
}
}
}
你的startPosting方法应该是这样的
private void startPosting(Bitmap bmp) {
byte[] data = bmp.toByteArray();
mProgress.setMessage("Uploading Image...");
final String title_val = mPostTitle.getText().toString().trim();
final String desc_val = mPostDesc.getText().toString().trim();
if (!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && filePath != null) {
mProgress.show();
StorageReference filepath = mStorage.child("BlogImages").child(uri_image_final.getLastPathSegment());
UploadTask uploadTask = filepath.putBytes(data);
uploadTask.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
// Handle unsuccessful uploads
}
}).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Uri downloadUri = taskSnapshot.getDownloadUrl();
DatabaseReference newPost = mDatabase.push();
DatabaseReference c = mDatabase.push();
newPost.child("EventTitle").setValue(title_val);
newPost.child("EventDescription").setValue(desc_val);
newPost.child("EventImage").setValue(downloadUri.toString());
newPost.child("PostId").setValue(c);
mProgress.dismiss();
startActivity(new Intent(PostActivity.this, MainActivity.class));
}
});
} else if (TextUtils.isEmpty(title_val) && TextUtils.isEmpty(desc_val) && imageUri != null) {
mProgress.show();
StorageReference filepath = mStorage.child("BlogImages").child(uri_image_final.getLastPathSegment());
UploadTask uploadTask = filepath.putBytes(data);
uploadTask.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
// Handle unsuccessful uploads
}
}).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Uri downloadUri = taskSnapshot.getDownloadUrl();
DatabaseReference newPost = mDatabase.push();
newPost.child("EventTitle").setValue("");
newPost.child("EventDescription").setValue("");
newPost.child("EventImage").setValue(downloadUri.toString());
mProgress.dismiss();
// startActivity(new Intent(PostActivity.this, MainActivity.class));
Intent load= new Intent(PostActivity.this,MainActivity.class);
load.putExtra(eventname,eventname);
startActivity(load);
}
});
}
else if (!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && imageUri== null){
Toast.makeText(getApplicationContext(),"Please insert an Image and Upload ! ",Toast.LENGTH_LONG).show();
}
}
以下是具有一系列方法来完成工作的ImagePicker类
public class ImagePicker {
private static final int DEFAULT_MIN_WIDTH_QUALITY = 400; // min pixels
private static final String TAG = "ImagePicker";
private static final String TEMP_IMAGE_NAME = "tempImage";
public static int minWidthQuality = DEFAULT_MIN_WIDTH_QUALITY;
public static Bitmap getImageFromResult(Context context, int resultCode,
Intent imageReturnedIntent) {
Log.d(TAG, "getImageFromResult, resultCode: " + resultCode);
Bitmap bm = null;
File imageFile = getTempFile(context);
if (resultCode == Activity.RESULT_OK) {
Uri selectedImage;
boolean isCamera = (imageReturnedIntent == null ||
imageReturnedIntent.getData() == null ||
imageReturnedIntent.getData().equals(Uri.fromFile(imageFile)));
if (isCamera) { /** CAMERA **/
selectedImage = Uri.fromFile(imageFile);
} else { /** ALBUM **/
selectedImage = imageReturnedIntent.getData();
}
Log.d(TAG, "selectedImage: " + selectedImage);
bm = getImageResized(context, selectedImage);
int rotation = getRotation(context, selectedImage, isCamera);
bm = rotate(bm, rotation);
}
return bm;
}
private static Bitmap decodeBitmap(Context context, Uri theUri, int sampleSize) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = sampleSize;
AssetFileDescriptor fileDescriptor = null;
try {
fileDescriptor = context.getContentResolver().openAssetFileDescriptor(theUri, "r");
} catch (FileNotFoundException e) {
e.printStackTrace();
}
Bitmap actuallyUsableBitmap = BitmapFactory.decodeFileDescriptor(
fileDescriptor.getFileDescriptor(), null, options);
Log.d(TAG, options.inSampleSize + " sample method bitmap ... " +
actuallyUsableBitmap.getWidth() + " " + actuallyUsableBitmap.getHeight());
return actuallyUsableBitmap;
}
/**
* Resize to avoid using too much memory loading big images (e.g.: 2560*1920)
**/
private static Bitmap getImageResized(Context context, Uri selectedImage) {
Bitmap bm = null;
int[] sampleSizes = new int[]{5, 3, 2, 1};
int i = 0;
do {
bm = decodeBitmap(context, selectedImage, sampleSizes[i]);
Log.d(TAG, "resizer: new bitmap width = " + bm.getWidth());
i++;
} while (bm.getWidth() < minWidthQuality && i < sampleSizes.length);
return bm;
}
private static int getRotation(Context context, Uri imageUri, boolean isCamera) {
int rotation;
if (isCamera) {
rotation = getRotationFromCamera(context, imageUri);
} else {
rotation = getRotationFromGallery(context, imageUri);
}
Log.d(TAG, "Image rotation: " + rotation);
return rotation;
}
private static int getRotationFromCamera(Context context, Uri imageFile) {
int rotate = 0;
try {
context.getContentResolver().notifyChange(imageFile, null);
ExifInterface exif = new ExifInterface(imageFile.getPath());
int orientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
}
} catch (Exception e) {
e.printStackTrace();
}
return rotate;
}
public static int getRotationFromGallery(Context context, Uri imageUri) {
String[] columns = {MediaStore.Images.Media.ORIENTATION};
Cursor cursor = context.getContentResolver().query(imageUri, columns, null, null, null);
if (cursor == null) return 0;
cursor.moveToFirst();
int orientationColumnIndex = cursor.getColumnIndex(columns[0]);
return cursor.getInt(orientationColumnIndex);
}
private static Bitmap rotate(Bitmap bm, int rotation) {
if (rotation != 0) {
Matrix matrix = new Matrix();
matrix.postRotate(rotation);
Bitmap bmOut = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true);
return bmOut;
}
return bm;
}
private static File getTempFile(Context context) {
File imageFile = new File(context.getExternalCacheDir(), TEMP_IMAGE_NAME);
imageFile.getParentFile().mkdirs();
return imageFile;
}
}
ImagePicker类具有处理压缩和图像旋转的所有方法。
希望它会有所帮助
感谢上传文件参考链接
答案 1 :(得分：1)
我这样做了：
private void startPosting() {
mProgress.setMessage(getString(R.string.downloading_route));
final String titleVal = mRouteTitle.getText().toString().trim();
final String descVal = mRouteDesc.getText().toString().trim();
if (!TextUtils.isEmpty(titleVal) && !TextUtils.isEmpty(descVal) && mImageUri != null) {
mProgress.show();
StorageReference filepath = mStorage.child("Route images").child(mImageUri.getLastPathSegment());
//compress image
mSelectImage.setDrawingCacheEnabled(true);
mSelectImage.buildDrawingCache();
Bitmap bitmap = mSelectImage.getDrawingCache();
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 50, byteArrayOutputStream);
byte[] data = byteArrayOutputStream.toByteArray();
UploadTask uploadTask = filepath.putBytes(data);
uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
@SuppressWarnings("VisibleForTests")
final Uri downloadUrl = taskSnapshot.getDownloadUrl();
final DatabaseReference newPost = mDatabase.push();
mDatabaseUser.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
newPost.child("title").setValue(titleVal);
newPost.child("desc").setValue(descVal);
newPost.child("image").setValue(downloadUrl.toString());
newPost.child("uid").setValue(mCurrentUser.getUid());
newPost.child("username").setValue(dataSnapshot.child("name").getValue()).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
startActivity(new Intent(AddRouteActivity.this, MainActivity.class));
}
});
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
mProgress.dismiss();
}
});
}
}
答案 2 :(得分：0)
//先清除局部变量
位图位图； Uri imageUri;
//按钮动作以调用图像选择器方法
ImageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Pick Image"),GALLERY_REQ_CODE);
}
});
//从onActivityResult获取位图
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == GALLERY_REQ_CODE && resultCode == RESULT_OK && data != null) {
imageUri = data.getData();
try {
bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
} catch (IOException e) {
e.printStackTrace();
}
imageView.setImageURI(imageUri);
}
}
//首先压缩图像，然后上传到Firebase
public void postImage() {
StorageReference storageReference = mStorageRef.child("Images/" + //imageName);
databaseReference = FirebaseDatabase.getInstance().getReference().child("Jobs").child(//imageName);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 20, bytes);
String path = MediaStore.Images.Media.insertImage(SaveJobActivity.this.getContentResolver(),bitmap,//imageName,null);
Uri uri = Uri.parse(path);
storageReference.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
taskSnapshot.getStorage().getDownloadUrl().addOnCompleteListener(new OnCompleteListener<Uri>() {
@Override
public void onComplete(@NonNull Task<Uri> task) {
final String downloadUrl = task.getResult().toString();
if (task.isSuccessful()){
Map<String, Object> update_hashMap = new HashMap<>();
**//assign download url in hashmap to upadate database reference**
update_hashMap.put("Image",downloadUrl);
**//update database children here**
databaseReference.updateChildren(update_hashMap).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful()){
//do what you want
}else {
//show exception
}
}
});
}else{
//show exception
}
}
});
}
});
}