how to invert picture on android

canvas (target);/** * First Draw round */canvas.drawcircle (MIN/2, MIN/2, MIN/2, paint);/** * Use src_in */paint.setxfermode (new Porterduffxfermode ( PorterDuff.Mode.SRC_IN));/** * Draw picture */canvas.drawbitmap (source, 0, 0, paint); return target;}In fact, mainly by: Paint.setxfermode (New Porterduffxfermode (PorterDuff.Mode.SRC_IN)); This line of code, for what, I explain to you, src_in such a pattern, Two draw the effect overlay after the inte

of the implementation of the file deletion function, the information is the following lines of code:1 New File (Fullpathimg.get (P)); 2 if (Removefile.exists ()) {3 removefile.delete (); 4 }Where Fullpathimg explains that it is the arraylistIt is also important to determine the existence of a file, after which the delete () method is called, but a problem is found:　　The file Manager does not already have the deleted picture name, but the phone co

+ = 5; - //every time you rotate a picture, you re-copy the original, reset the brush, and so on, or you can change it after the copied image . the //Copy the original picture + FinalBitmap Copybitmap =Bitmap.createbitmap (Srcbitmap.getwidth (), A srcbitmap.getheight (), Srcbitmap.getconfig ()); the //Create a reple

; } img.setimageresource (Imgs[currentimgindex]);//Show Pictures } } }　　XML code (ACTIVITY_MAIN.XML):LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"android:orientation= "vertical"Android:paddingbottom= "@dimen/activity_vertical_margin"Android:paddingleft= "@dimen/activity_horizontal_margin

This paper mainly introduces how to use rotate to realize the effect of rotating picture in Android. Android platform provides two kinds of animation, one is Tween animation, that is, through the scene of the object constantly doing image transformation (translation, scaling, rotation) to produce animation effect; the second category is Frame animation, which is

Recently in a project, there is a function is to achieve the Android QQ friends dynamic inside thumbnail zoom, view the effect of large image. Used to know, this special effect is very good, useless download a play it. I just started thinking that the big picture that zoomed in was an activity or a dialog. But after trying to find out how also can not achieve that effect (with the realization of friends, pl

This article describes the Android programming implementation of hand-painted and saved as a picture of the method. Share to everyone for your reference, specific as follows: Run Effect Chart preview: Should be yzuo_08 required to do this demo, with the previous tablet demo is different from the canvas can be saved as a picture of the content. Attach Key cod

Transferred from: http://www.oschina.net/question/221817_121051The main analysis of the Android ListView scrolling process in the picture shows the repetition, confusion, flashing reasons and solutions, incidentally mention the cache mechanism of the ListView.1. Cause analysisListView Item Caching mechanism : to make the performance better, the ListView caches the row item (the view for a row). The ListView

() {ishide = true; Mhandler.sendemptymessage (what_show);}/** Hide ImageButton view **/private void Hideimagebuttonview () {new Thread () {@Override public void run () {try {Thread.Sleep 1 500); Ishide = false; Mhandler.sendemptymessage (What_hide); catch (Interruptedexception e) {i114gboxlogutils.e (TAG, E.getmessage ());}; }.start (); /** processing Asynchronous Messages **/@SuppressLint ("Handlerleak") private Handler Mhandler = new Handler () {@Override public void Handlemessa GE (android.o

The project needs to use in the code to dynamically adjust the position of the picture and set the size of the picture, can automatically zoom the picture, with the ImageView control, as follows:1. layout fileRelativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.c

Principle: The two different effects of the picture in the same position, change the transparency of the image above, it can be achieved.Layout file:Relativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"Android:paddingleft= "@dimen/activity_horizontal_margin"Android:padd

In the picture loading library Bad Street today, choose a suitable for their own use of the image loading library has become a necessary step for every Android developer. Now the well-known picture loading library in the market has Uil,picasso,volley Imageloader,fresco and our protagonist today glide. They are not the same, they can not judge who is better than w

I want to achieve the effect: But the designer gives this:.The first thing I think about is that this is like the Windows computer settings wallpaper has what stretch, adaptive, tile and other types, this should be the legendary tile bar.Then we know that an ordinary button, set his background, is nothing more than setbackgrounddrawable/resource/color these kinds of methods can be called in the method can not be set to tile.What do we do?1, the big Baidu search "

Highlight (String text,int color1,int color2,int fontsiz e) {Spannablestringbuilder spannable=new spannablestringbuilder (text);//For variable string Characterstyle span_0=nu ll,span_1=null,span_2; int End=text.indexof ("\ n"); if (end==-1) {//Use the first color to display span_0=new Foregroundcolorspan (color1) If there is no line break; Spannable.setspan (span_0, 0, Text.length (), spannable.span_exclusive_exclusive); }else{span_0=new Foregroundcolorsp

(String imageuri, view view, Bitmap loadedimage) {if (loadedimage! = null) {ImageView ImageView = (ImageView) view;Whether to display the first timeBoolean firstdisplay =!displayedimages.contains (Imageuri);if (Firstdisplay) {Picture fade-in effectFadeinbitmapdisplayer.animate (ImageView, 500);Displayedimages.add (Imageuri);}}}}/*** Show Pictures* Parameter 1: Image URL* Parameter 2: control to display pictures* Parameter 3: Display the picture's set

This article explained the Android virtual image, fuzzy picture, image of the implementation of the effect of glass, the specific contents are as follows Effect as shown: This method can be easily implemented using Renderscript on Android: private void Blur (Bitmap bkg, view view, float radius) { Bitmap overlay = Bitmap.createbitmap (View.getmeasur

This article is an example of the Android implementation for easy bulk operation of the more optional picture listview. Share to everyone for your reference, specific as follows: Before the project needs to implement a selectable list of pictures, users select one or more pictures, batch upload. But there is more than the choice of ordinary list of code, there is a simple

original size so that the picture length/width is equal to or less than the view's length/width fit_center/fitcenter Enlarge/Shrink the picture to the width of view, centered fit_end/fitend expands/shrinks the picture to the width of the view, displayed in the lower part of the view Fit_start/fitstart expands/shrinks the