从图库中删除图片-android

时间:2018-07-11 17:52:39

标签: android

我正在制作一个可从相机捕获图像并将其上传到Firebase的应用程序。将图像上传到Firebase之后,我想从图库的Camera文件夹和另一个名为Pictures的文件夹中删除该图像,该文件夹在捕获图像后自动创建。我尝试了SO的多种解决方案,但没有一个可行。我试图使用file.delete()和路径从uri中删除图像,但是图像仍在上述文件夹中。我正在使用API​​ 21,因此我在某处读过一些内容,我们无法通过file.delete()访问sd卡文件,那么有什么解决方案?请提出在> = API 19的每台设备上都可以使用的方法。另外,无论在何处保存图像(即是外部存储器还是内部存储器),都建议一种可行的方法,因为我不知道存储设置用户可以在手机上使用。

我在这里提供一些代码段,请告诉我是否还有其他需要。

我正在创建这样的意图对象:

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_REQUEST_CODE);

我正在这里进行上传工作:

       @Override
         protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if(requestCode == CAMERA_REQUEST_CODE && resultCode == RESULT_OK && data!= null){
            mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.waitwhilepicisuploaded);
            mediaPlayer.start();

            final Bitmap photo = (Bitmap) data.getExtras().get("data");

            //the tap to open camera button disappears
            tapCameraBtn.setVisibility(Button.GONE);

            //setting the color of progress bar to white
            progressBar.getIndeterminateDrawable().setColorFilter(ContextCompat.getColor(this, android.R.color.white), PorterDuff.Mode.SRC_IN );

            //and now we make the progress bar visible instead of the button
            progressBar.setVisibility(ProgressBar.VISIBLE);

            mCount = FirebaseDatabase.getInstance().getReference().child(FirebaseAuth.getInstance().getCurrentUser().getPhoneNumber().toString()).child("count");

            uploadPhoto(mCount, photo);
        }

    }

    public void uploadPhoto(DatabaseReference mCount, Bitmap photo){

        final Uri uri = getImageUri(getApplicationContext(), photo);


        final String userPhoneNumber = FirebaseAuth.getInstance().getCurrentUser().getPhoneNumber();
        uniquefilename = userPhoneNumber.toString();

        mCount.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                photoCounter = dataSnapshot.getValue(Integer.class);

                //uploading image captured to firebase
                uploadPhotoToFirebase(uri, userPhoneNumber, uniquefilename, photoCounter);

            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                Log.d("The read failed: ", "FAILED");
            }
        });

    }

    public void uploadPhotoToFirebase(Uri uri, final String userPhoneNumber, String uniquefilename, int photoCounter){

        final StorageReference filepath = storageReference.child("/" + uniquefilename + "/photos/" + "photo_" + photoCounter);

        filepath.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {

                mediaPlayer.stop();
                mediaPlayer.release();

                filepath.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                    @Override
                    public void onSuccess(Uri uri) {

                        Toast.makeText(getApplicationContext(), uri.toString(), Toast.LENGTH_SHORT).show();

                        deleteFile(uri);
                        uploadPhotoToKairos(uri,userPhoneNumber);


                    }
                }).addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception exception) {
                        // Handle any errors
                        Toast.makeText(getApplicationContext(), "URI not found", Toast.LENGTH_SHORT).show();
                    }
                });

                Toast.makeText(AddContactActivity.this, "Uploading finished!", Toast.LENGTH_LONG).show();

                Intent intent = new Intent(AddContactActivity.this, RecordAudioActivity.class);
                startActivity(intent);
                finish();
            }
        });
    }

  deleteFile(Uri uri){

        File fdelete = new File(uri.getPath());
        if (fdelete.exists()) {
           if (fdelete.delete()) {
                Log.d("file deleted" , uri.getPath());
           } else {
                Log.d("file not Deleted " , uri.getPath());
           }
        }
  }



    public Uri getImageUri(Context inContext, Bitmap inImage) {
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
        String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);

        return Uri.parse(path);
    }

此外,清单文件中还具有以下权限:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />

我从SO的各种答案中删除了我尝试过的所有不需要的代码,这就是原始代码。

1 个答案:

答案 0 :(得分:0)

只需创建您自己的文件以在任何目录中捕获,然后将file_path(String)保存在任何位置即可。

然后将该文件传递给意图

Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M) {
            //for nougat and above using file provider..
    takePictureIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, FileProvider.getUriForFile(this, "provider path(like package)", file));
        } else {
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
        }
        startActivityForResult(takePictureIntent,
                CAMERA_IMAGE_REQUEST);

从file_path获取URI或文件,并从文件路径获取所需的图像或位图。 按文件路径删除文件。

请检查此文件提供程序

https://developer.android.com/reference/android/support/v4/content/FileProvider