picture widget android

Today to introduce the picture loading frame Android-universal-image-loaderThe download path on GitHub is: Https://github.com/nostra13/Android-Universal-Image-Loadercan also be self-Baidu download.First to encapsulate a class cachetool, because the other way to load the picture is a bit cumbersome, so here only a simpl

Topic:When the network is bad, how to optimize the load picture of the network when stalling?Ideas:Consider both the loading of the picture itself and the storage of the phoneWorkaround: 1. Find a replacement for an existing picture formatIn a number of image formats, Google's WEBP is selected. The reason for this is simple: high compression efficiency and good s

This article is an example of the implementation of Android programming, such as proportional display of the image method. Share to everyone for your reference, specific as follows: In Android, because of the density of the impact, if you want the picture of the width is not good, specific why I will probably say, the specific please search for the mother or anc

function is an interface has a imageview, click ImageView, enter the local album, select a picture, ImageView control display selected pictures. The demo steps are as follows: The first step is to create a new Android project named Imagecachedemo. The directory structure is as follows: The second step is to create a new Imagecacheutil.java tool class with the following code: Package com.tutor.oom;

more to the functionality provided by the Android system. Standing on the shoulders of giants, you can see farther. About picture loading and picture selection This article does not mention that the pictures loaded I refer to the article, interested friends can go to GitHub view, Https://github.com/easonline/AndroidImagePicker. I have in my demo to the source c

using gallery and Imageswitcher Create a Picture browser gallery we sometimes see dynamic images on a phone or PC, move it with a mouse or finger touch, create a dynamic picture scrolling effect, and trigger other event responses based on your click or touch. Similarly, this implementation is also available on Android, which is implemented by gallery the thumbnai

Android development of the image store is more time-consuming things, and the use of the third party of the seven Neu Yun, it can be a good solution to these worries, recently I was also learning seven Cow SDK, will use the process in this record down, easy to use later. First say seven Neu Yun storage principle, above this picture is the official schematic diagram, the expression of course more clear.

Android pictures around the switch can be seen everywhere, today I also try to look up data to try to do a bit, quite simple a small demo, but also found some problems, words not to say, on the code ~: Using 3 XML files as Viewpager sliding page, the layout is the same, showing only one of the following: Just used a imageview as a container for displaying pictures. Main Page layout: The next step is the code for the main

In the Android project to access the network picture is very common thing, if we have to access the network every time to get pictures, will be very expensive traffic, and pictures occupy a larger memory space, too many pictures and do not release the words can easily cause memory overflow. For the two problems encountered above, first of all the flow of traffic we can load the first time the image cached t

) {e.printstacktrace (); Read the picture public static Bitmap readimage (String URL) {if (!ismounted ()) {return null; File File = new file (cache_dir,getfilename (URL)); if (file.exists ()) {return bitmapfactory.decodefile (File.getabsolutepath ()); return null; //Empty cache directory public void Clearcaches () {File Dir = new File (cache_dir); file[] File_datas = Dir.listfiles (); for (File File:file_datas) {file.delete (); } }

""true"); //Aspectx aspecty is the ratio of width to height, where the square is set (aspect ratio is 1:1)Intent.putextra ("Aspectx", 1); Intent.putextra ("Aspecty", 1); //Outputx outputy is a cropped image with a wide height of Intent.putextra ("OUTPUTX"); Intent.putextra ("outputy"); Intent.putextra ("Return-data"true); cut_ok);}4. Display and save pictures/** * Save the picture data after cropping to set the

) { Super.onpostexecute (Result); Message message=new Message (); message.what=0x123; Handler.sendmessage (message); } } /** * Save Bitmap to Local * @param bitmap * @param path Local * @return void */ public void Savaimage (Bitmap Bitmap, String path) { File file=new file (path); FileOutputStream fileoutputstream=null; //folder does not exist, it is created if (!file.exists ()) { File.mkdir (); } try { fileoutputstrea

EditText; Private ImageView ImageView; Private Bitmap PNGBM; Private URL URL; Private Boolean finishflag = false; @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); Btnpreview = (Button) Findviewbyid (R.id.btnpreview); ImageView = (ImageView) Findviewbyid (R.id.imageview); EditText = (edittext) Findviewbyid (R.id.edittext); Btnpreview.setonclicklistener (New View.onclicklistener ()

(); }}5.androidmanifest.xml Configure permissions to access the network in the manifest file.And if 4.0 or above version of the words can not directly obtain the picture, direct access to the network image will be reported android.os.NetworkOnMainThreadException exception, because more than 4.0 access to the network function can not occur in the main thread to run, And if the above access mode is changed to asynchronous operation will not appear o

Android Display picture in ListView (repeat confusion flashing problem)1. Cause analysisListView Item Cache mechanism:To make the performance better, the ListView caches the line item (the view that corresponds to a row).The ListView obtains the item for each line through the GetView function of the adapter.During the sliding processA. If a line item has been slid out of the screen, if the item is not in th

I used PHP to write a code and images generated by the file (this file is named captcha.php), placed on the server side. Ask the Android client how to get a picture by accessing this file (via URL, such as localhost/web/captcha.php) A picture of the verification code? PHP generates a code and a picture of the codes as

This article uses the Android native selection and cropping feature. Here's the code:public class Pickandcropactivity extends appcompatactivity implements view.onclicklistener{public static final int REQ uest_code_pick_img = 1; public static final int request_code_crop_img = 2; /** * ImageView Show selected pictures and cropped images */Private ImageView img; /** * Select the resulting picture U

Preamble, version compatibility issues are mainly due to errors caused by the format of the URI after 4.4 and 4.4Info Android 4.4 Select a picture from the gallery, get the picture path and crop1. Take photos and select pictures ① Select pictures1 New Intent (intent.action_get_content); 2 Intent.settype ("image/*"); 3 Startactivityforresul

How to add a watermark to a picture in Android, some core code is intercepted below, for reference only:/*** Get pictures with smaller images* @param src* @return*/public static Bitmap Scalebitmap (String src){Get the height and width of the pictureBitmapfactory.options Options = new Bitmapfactory.options ();This setting allows Bitmapfactory.decodefile to get an empty p