undelete pictures android

:@Overridepublic void Invalidate () {Mweakbitmap = Null;if (Mmaskbitmap! = null) {mmaskbitmap.recycle (); mmaskbitmap = null;} Super.invalidate ();}Mainly because we cache, when invalidate is called, the cache is purged.4. layout Files and：All right, that's easy.Statement: This example references: Https://github.com/MostafaGazar/CustomShapeImageView; But some of the code changes, such as Customshapeimageview if the picture is a rectangle, But set to the circle type, the effect is still a rectang

"Android:layout_centerhorizontal= "true"Android:layout_centervertical= "true"Android:layout_width= "Wrap_content"android:layout_height= "Wrap_content"android:text= "@string/hello_world"/>(4) The next natural is to use, back to Mainactivity.java: PackageCom.himi.smart;ImportCOM.HIMI.HEBAO.R;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.widget.ImageView; Public classMainactivityextendsActivity {PrivateSmartimageview IV; @Overrideprotected voidonCreate (Bundle savedinstancestate)

The example in this article describes the Android programming method for drawing circular pictures. Share to everyone for your reference, specific as follows: The effect chart is as follows: First step: Create new Roundview custom control inherit view Package com.rong.activity; Import COM.RONG.TEST.R; Import Android.content.Context; Import Android.graphics.Bitmap; Import Android.graphics.Bitmap.Con

For programmers, especially the front-end design designer, nine Gongge picture is necessary (. 9.png), for beginners do not know this nine Gongge picture what is the use, in fact, this nine Gongge pictures actually commonly used in Android button components, to up and down the background image.Tools/Materials Computer Draw9patch.bat Method/Step The first step: first to find Draw9patch.bat, my

;importandroid.content.context;import android.os.environment;importandroid.os.bundle;importandroid.util.log;import com.lidroid.xutils.httputils;importcom.lidroid.xutils.exception.httpexception;import com.lidroid.xutils.http.responseinfo;importcom.lidroid.xutils.http.callback.requestcallback;import java.io.file;importpl.droidsonroids.gif.gifdrawable;importpl.droidsonroids.gif.gifimageview;/** **https://github.com/koral--/android-gif-drawable*https://gi

Android. 9PNG picture MakerIn the process of Android development, we often because there is no good art image distortion, so that the interface looks less than a lot of, sometimes we would like to drawable-hdpi,ldpi,mdpi the different resolution of the image, so that although it can effectively avoid distorted images, But this one is the trouble two is that the picture resource is too big, so we use. 9 imag

Android takes pictures and saves them (compressing and splitting images ), A small function module extracted from the project. If you need it, you can use it for reference. : Function: Save the photo to SDcard. Specific requirements: 1. Save the image name in the format of: image name _ mobile phone number _random 4 bits .jpg 2. Break down, compress, and display images3. Write the SDCard and save it

cannot be centered. the first way to find a solution online is to set ImageView's ScaleType property to Fitcenter in the XML file, and then set Setontouchlistener before the ImageView setscal () method. EType (Scaletype.matrix); But this method I did not succeed, the picture initially or in the upper left corner, the other way is to calculate the phone screen height and width, to the image center point (x, Y), and then through the matrix translation to that position, and finally through the Set

ListView asynchronous loading of pictures is a very practical way, usually to get pictures through the network generally use this method is better, the user experience is good, do not let the user wait, the following said implementation method, first affixed to the Main method code: The code is as follows Copy Code Package cn.wangmeng.test;Import java.io.IOException;Import Java.i

There is an article in the Android Development guide on how to load pictures more efficiently, with the address https://developer.android.com/training/displaying-bitmaps/ Index.html, this article describes in detail how to load high-definition graphics to memory, while avoiding system report oom problem, the article is very good, the sample program can also run directly. During a minor version upgrade of ou

(Environment.getexternalstoragedirectory (), Image_file_name) ; Croprawphoto (Uri.fromfile (tempfile)); else {Toast.maketext (getapplication (), "No sdcard!", Toast.length_long). Show (); Case Code_result_request:if (Intent!= null) {Setimagetoheadview (intent);//Set Picture box} break; } super.onactivityresult (Requestcode, ResultCode, intent); /** * Crop the original picture */public void Croprawphoto (Uri uri) {Intent Intent = new Intent ("Com.android.camera.action.CROP"); Inten T.setdataandt

, 10,10, paint);//draw pictures in 10x10 's positionCanvas.save ();//Save Canvas StateMatrix M1=NewMatrix ();//MatrixM1.settranslate (500, 10);//Pan X500 Y10Matrix m2=NewMatrix (); M2.setrotate (15);//Rotate 15 °Matrix m3=NewMatrix (); M3.setconcat (M1, M2); //merging matricesM1.setscale (0.8f, 0.8f);//set the zoom ratioM2.setconcat (M3, M1);//MergingCanvas.drawbitmap (Bitmap, M2, paint);//drawing, panning, rotating, zoomingCanvas.restore (

In Android development, you will often need to use a button with text and pictures, below to explain the common implementation methods.I. Using the system's own button implementationThe simplest way to do this is to use the button that comes with the system, which is the smallest amount of code. One of the properties of the button is Drawableleft, which can set the picture to the left of the text, but this

The initial pair of. 9 pictures is not very understanding, some tutorials let people can't touch the mind.The recent re-study finally understood its principle.In fact, the most important thing to remember is that. 9 The meaning of the four black edges of the picture is different for each black edge: Top: When horizontal stretching, keep other positions motionless, only at this point of the area do unlimited extension (copy) Left: in vertical

is larger than 100kb after compression while(Baos.tobytearray (). length/1024 > 2048) {//loop to determine if the image is larger than 1024kb after compressionBaos.reset ();//Reset BAOs is empty BAOsImage.compress (Bitmap.CompressFormat.JPEG, Options, BAOs);//this compresses the options% and stores the compressed data in the BAOs .Options-= 10;//each time, it's reduced by ten} bytearrayinputstream ISBM=NewBytearrayinputstream (Baos.tobytearray ());//Store the compressed data BAOs in the

This article discusses the following two topics around. 9.png format pictures:1. Features of the format picture2. How to MakeI. Features of the file in 9.png formatCompared to the traditional PNG format picture, the 9.png format picture has a circle of dots around the picture, which is used to define the expandable area of the picture and the content display area.Images of this format have the ability to adjust the size of the

text link : A code load network pictures to imageview--android PicassoIntroduce an android framework here: Picasso.Picasso is an open source Android graphics cache Library at square, address http://square.github.io/picasso/, which allows for image download and caching capabilities. Just one line of code is required to

="android.permission.INTERNET" /> uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />3, in the activity of the application3.1 Instantiation of Imageloader protected ImageLoader imageLoader = ImageLoader.getInstance();3.2 Configuring option options = new DisplayImageOptions.Builder() .showImageOnLoading(R.drawable.dog)／／加载图片时显示的默认图片 .showImageForEmptyUri(R.drawable.girl)／／访问地址无内容时显示的图片 .showImageOnFail(R.drawable.luobo)／／加载失败时显示的图片

Teach you to take care of Android custom ViewGroup http://www.jianshu.com/p/138b98095778 words 1794 read 7030 comments 8 likes 37 Previous we introduced the knowledge of custom view in Android, and implemented a custom view like the Google Rainbow Progress bar, and today we'll learn more about customizing a viewgroup. ViewGroup we know that ViewGroup is the container class of view, we often use the linearla

Android BitmapShader implements circular and rounded pictures,Reprinted please indicate the source: bytes I remember that I wrote a blog post about Android which perfectly implemented image rounded corners and circles (for implementation analysis). It mainly implemented a custom View and Xfermode. In fact, there are many methods to achieve the rounded corner imag