Android 中的 Jpeg 压缩质量

发布于 2024-10-27 12:08:24 字数 641 浏览 6 评论 0原文

我正在启动图像捕获意图来拍照，添加 uri，以便图片很小。我的问题是我想在开始活动之前设置输出 jpeg 质量。

ContentValues vals = new ContentValues();
vals.put(Media.DISPLAY_NAME, "test title");
vals.put(Media.MIME_TYPE, "image/jpeg");

Uri imageFileUri = context.getContentResolver()
    .insert(Media.EXTERNAL_CONTENT_URI, vals);

Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
i.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, imageFileUri); 

context.startActivityForResult(i, CameraImportActivity.CAMERA_REQUEST);

我想我可以在拍照后进行下采样，但如果我可以请求该活动为我做这件事，我愿意这样做。

作为额外问题，我如何更改在图库中保存的相册，以及如何防止相机活动在默认位置保存副本（在我的手机上是“照片”）

原文

I am launching the image capture intent to take a picture, adding a uri so the picture is tiny. My problem is I want to set the output jpeg-quality before I start the activity.

ContentValues vals = new ContentValues();
vals.put(Media.DISPLAY_NAME, "test title");
vals.put(Media.MIME_TYPE, "image/jpeg");

Uri imageFileUri = context.getContentResolver()
    .insert(Media.EXTERNAL_CONTENT_URI, vals);

Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
i.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, imageFileUri); 

context.startActivityForResult(i, CameraImportActivity.CAMERA_REQUEST);

I suppose I could downsample after the picture is taken, but if I can request the activity do it for me I would like to do so.

As bonus questions, how do I change the album they get saved to in the gallery, and how do I prevent the camera activity from saving a copy in the default location (on my phone it is "photos")

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