DPI allocations at different resolutions available on Google's website;2. How big a photo is needed. Many pictures actually show on the phone do not need to completely load the original image into memory, such as my phone camera took a picture is 4208*3120, loaded into memory occupied memory is 52M, this is very scary, two photos almost put your app memory to consume light. In general, you need to load the
QR code scan Android Zxing image stretching Solution
Zxing is a QR code scanning project provided by google.
By default, the image is stretched after the screen is converted to a portrait.
The solution is as follows:
Zxing modifies
Void initFromCameraParameters (Camera camera
This is my watermark http://www.eoeandroid.com/thread-206223-1-1.html.This is what I force on GPSHttp://www.eoeandroid.com/thread-206003-1-1.html
This was sent when I got off work today.
Http://www.eoeandroid.com/thread-206311-1-1.html
Source code: Click to open the link
Today, I made a small demo for a day at the company, mainly because I saw the current address when you looked at the iPhone, just wondering how to implement it on Android, in the
Android Zxing QR code scanning image stretching,
In this project, the QR code scanning is integrated with zxing, and the image on the scanning interface is obviously stretched and deformed.
Based on past experience, this problem is generally caused by misplacement of x and Y axes. The problem of x and Y axes can be solved.
Because of this problem, many people hav
Recently made a choice of multi-map and upload the server, in the Internet to find some demo, appropriate to do a bit of adjustment, with the use of can not forget, remember that after you can see more, I feel that their blog some slag, but also hope that we do not mind ah, where there are errors hope that everyone in time to correct.Well, the following specific analysis: (Want to make a function, requirements analysis is essential, the requirements, logic to understand the handwriting code, the
contact the author or leave a message to be appreciatedRELATED LINKS finally can be based on the + Number function module to customize their own to develop such as photo album map and other functions if there is a better development of functional modules such as Baidu High-German map positioning or more optimizationPhoto Album selection of modules willing to open source benefits broad cloud developers please contact me message welcome pull request! end~ Copyright NOTICE: This article for Bo Mas
;
}
According to the input of the width and height of the resolution to calculate the reduction ratio, and then according to the input compression quality value, compressed picture, get compressed bitmap, and then save the cost of the file.
This is a very common image compression method.
4. WEBP Contrast
I use the photos in my daily life to do a simple contrast test, not particularly rigorous, only for simple r
In the past to do the mobile phone upload pictures, direct access to the camera to capture the original image upload, the original size is generally 1~2m, so upload a waste of resources, some scenes also need to upload more than one picture, so recently looked at a lot of predecessors written about the image processing, and then try to change a picture compressio
1. Phenomena
When we upload some local images of Android on the app, sometimes when we upload some images, we will somehow flash back, and check that there is no oom exception. Also upload some similar images can be used normally.
1.1 Turn on select local imageIntent intent = new Intent(Intent.ACTION_PICK, null); intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,"image/
");//view bitmap size in log fileNewb = Bitmap.createbitmap (W, H, Bitmap.Config.ARGB_8888);//Create a new bitmap of the same size as SrcCanvas CV = new canvas (NEWB);//Create a canvas of equal sizeCv.drawbitmap (SRC, 0, 0, NULL);//Start by drawing src into the canvas from the coordinates 0,0Set the size of the watermark logoWatermark = Bitmap.createscaledbitmap (watermark, N, I, true);Paint Textpaint = new paint (Paint.anti_alias_flag);Typeface font = typeface.create (Typeface.default, typefac
Once a friend asked me a question, a 512*512 150KB png format picture and a 512*512 100KB compression ratio is 8 jpg format picture, loaded into memory, that is, loaded into a bitmap, which occupies a large memory? This question seems to be a little difficult to answer, the test will know.
Well, I've got three pictures on request,
1.512*512px, 114KB, PNG
2.512*512px, 138KB, JPG, compression ratio 12
3.512*512px, 57KB, JPG, compression ratio 8
The next step is to write a demo, a bitmap load
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