java - Android Imageview 上的大图像因 OOM 错误导致应用程序崩溃

Question

下面的代码允许用户从他们的图库中选择 4 张图像并上传到服务器。目前它正在上传所有 4 个小图像，但是当我尝试大图像时，它会因 OOM 错误而崩溃。

即使我尝试加载 2 个大图像，当我加载 OOM 错误的大图像时，应用程序也会崩溃。处理此类问题最有效的方法是什么？我读过这篇Android Bitmaps但我似乎不知道如何在我的四个图像代码中实现。我尝试过 Picasso，但该应用程序的行为仍然与上面相同(同上)。

        SelectImageGallery1 = (Button)findViewById(R.id.buttonSelect1);
        SelectImageGallery2 = (Button)findViewById(R.id.buttonSelect2);
        SelectImageGallery3 = (Button)findViewById(R.id.buttonSelect3);
        SelectImageGallery4 = (Button)findViewById(R.id.buttonSelect4);

        UploadImageServer = (Button)findViewById(R.id.buttonUpload);

        SelectImageGallery1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent();
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(Intent.createChooser(intent, "Select Image1 From Gallery"), 1);

            }
        });

        SelectImageGallery2.setOnClickListener(new View.OnClickListener() {
              @Override
                public void onClick(View view) {
                    Intent intent = new Intent();
                    intent.setType("image/*");
                    intent.setAction(Intent.ACTION_GET_CONTENT);
                    startActivityForResult(Intent.createChooser(intent, "Select Image4 From Gallery"), 2);
                }
          });

        SelectImageGallery3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent();
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(Intent.createChooser(intent, "Select Image3 From Gallery"), 3);

            }
        });

        SelectImageGallery4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent();
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(Intent.createChooser(intent, "Select Image4 From Gallery"), 4);

            }
        });

        UploadImageServer.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                GetImageNameEditText1 = imageName1.getText().toString();
                GetImageNameEditText2 = imageName2.getText().toString();
                GetImageNameEditText3 = imageName3.getText().toString();
                GetImageNameEditText4 = imageName4.getText().toString();
               ImageUploadToServerFunction();
            }
        });

    }



    @Override
    protected void onActivityResult(int RC, int RQC, Intent I) {
        super.onActivityResult(RC, RQC, I);
        if (RC == 1&&RQC == RESULT_OK&&I != null&&I.getData() != null) {
            Uri uri = I.getData();
            try {
                bitmap1 = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
                imageView1.setImageBitmap(bitmap1);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        if (RC == 2 && RQC == RESULT_OK && I != null && I.getData() != null) {
            Uri uri = I.getData();
            try {
                bitmap2 = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
                //bitmap1 = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
                imageView2.setImageBitmap(bitmap2);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        if (RC == 3 && RQC == RESULT_OK && I != null && I.getData() != null) {
            Uri uri = I.getData();
            byte[] imageAsBytes=null;
            try {
                bitmap3 = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
                //bitmap1 = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
                imageView3.setImageBitmap(bitmap3);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (RC == 4 && RQC == RESULT_OK && I != null && I.getData() != null) {
            Uri uri = I.getData();
            try {
                bitmap4 = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
                //bitmap1 = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
                imageView4.setImageBitmap(bitmap4);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    public String getStringImage1(Bitmap bitmap1){
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap1.compress(Bitmap.CompressFormat.JPEG, 60, baos);
        byte[] imageBytes = baos.toByteArray();
        String encodedImage1 = Base64.encodeToString(imageBytes, Base64.DEFAULT);
        return encodedImage1;
    }

    public String getStringImage2(Bitmap bitmap2){
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap2.compress(Bitmap.CompressFormat.JPEG, 60, baos);
        byte[] imageBytes = baos.toByteArray();
        String encodedImage2 = Base64.encodeToString(imageBytes, Base64.DEFAULT);
        return encodedImage2;
    }
    public String getStringImage3(Bitmap bitmap3){
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap3.compress(Bitmap.CompressFormat.JPEG, 60, baos);
        byte[] imageBytes = baos.toByteArray();
        String encodedImage3 = Base64.encodeToString(imageBytes, Base64.DEFAULT);
        return encodedImage3;
    }

    public String getStringImage4(Bitmap bitmap4){
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap4.compress(Bitmap.CompressFormat.JPEG, 60, baos);
        byte[] imageBytes = baos.toByteArray();
        String encodedImage4 = Base64.encodeToString(imageBytes, Base64.DEFAULT);
        return encodedImage4;
    }

Answer 1

这是通过使用 Glide 实现的，如下所示。使用 glide 可确保处理 OOM 错误，并且在加载 30mb 图像时不会重复出现这些错误。

 @Override
    protected void onActivityResult(int RC, int RQC, Intent I) {
        super.onActivityResult(RC, RQC, I);
        if (RC == 1 && RQC == RESULT_OK && I != null && I.getData() != null) {
            Uri uri = I.getData();
            RequestOptions options = new RequestOptions()
                    .format(DecodeFormat.PREFER_ARGB_8888)
                    .placeholder(R.drawable.ic_launcher_background)
                    .error(R.drawable.ic_launcher_background);

            Glide.with(this)
                    .setDefaultRequestOptions(options)
                    .asBitmap()
                    .load(uri)
                    .centerInside()
                    .into(new CustomTarget<Bitmap>(512, 512) {
                        @Override
                        public void onResourceReady(@NonNull Bitmap bitmap1, @Nullable Transition<? super Bitmap> transition) {
                            imageView1.setImageBitmap(bitmap1);
                            UploadActivity.this.bitmap1 = bitmap1;
                        }

                        @Override
                        public void onLoadCleared(@Nullable Drawable placeholder) {
                        }
                    });
        }