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Method One:Only the thumbnails are loaded when the picture is loaded from the network or locally.This method does not occupy a lot of memory, but its fatal disadvantage is that because the load is thumbnail, so the picture distortion is more serious, for the image quality requirements of high application, you can use the following method.Method Two:The use of Java Soft reference, image caching, will often need to load the picture, stored in the cache, to avoid repeated loading.Method Three:Destr

Android obtains the current software version number and version name. /*** Obtain the local software version */public static int getLocalVersion (Context ctx) {int localVersion = 0; try {PackageInfo packageInfo = ctx. getApplicationContext (). getPackageManager (). getPackageInfo (ctx. getPackageName (), 0); localVersion = packageInfo. versionCode; LogUtil. d ("TAG", "version of the software .. "+ Lo

Android allows you to enter a certain number of words in the text box for search. (1) Implement the text box automatic search function: Et_phone is an editText input box control. Et_phone.addTextChangedListener (new TextWatcher () {public void onTextChanged (CharSequence s, int start, int before, int count) {if (s. length ()> = 3) {String address = AddressQueryDao. numberQuery (s. toString (); TV _result

String FilePath = "/sdcard/feijiedemo.apk"; Packagemanager Packagemanager = Getpackagemanager (); PackageInfo PackageInfo = Packagemanager.getpackagearchiveinfo (FilePath, packagemanager.get_activities); LOG.D ("name", Packageinfo.packagename); LOG.D ("UID", Packageinfo.shareduserid); LOG.D ("VName", packageinfo.versionname); LOG.D ("Code", Packageinfo.versioncode+ ""); android-get information about the. apk file. Packag

UsesSystem.sysutils, System.types, System.uitypes, system.classes, System.variants,FMX. Types, FMX. Controls, FMX. Forms, FMX. Graphics, FMX. Dialogs,androidapi.jni.graphicscontentviewtext,Androidapi.jnibridge, Androidapi.JNI.Telephony, Androidapi.JNI.JavaTypes,FMX. Helpers.android, Fmx.stdctrls;TypeTForm1 = Class (Tform)Btn1:tbutton;Lbl1:tlabel;Procedure Btn1click (Sender:tobject);Private{Private declarations}Public{Public declarations}EndVarForm1:tform1;Telephonymanager:jtelephonymanager;Telep

http://blog.csdn.net/sz0268/article/details/51706397：In Android Studio writing code, it is not generally possible to create a project directly, write code, and then run it, but once you change the main activity, Instead of manually changing the activity configuration in Androidmanifest.xml, this can happen, reminding us that there is no main activity. Manually add the child nodes of the main activity Error View:Add code: activity android:name=". D

Application Scenarios:1. Display the version number of the application in the interface;2, the user launches the application, the background to determine whether the application is the latest version.Each of these scenarios requires that the app's version number be automatically obtained in the program.Idea Introduction :In Android, The version

Android ORC text recognition-identification ID card number (with source code), androidorc Project addressHttps://github.com/979451341/OrcTestLet's talk about the functions implemented in this project. We can pass Bitmap of this image to the code of tess-two to get the scan result.Here I will post the address of the text recognition framework created for Android,

Most of the time the Android system gives us a control that does not meet our needs and makes the interface a good one, so most of the controls are written by ourselves.When I make a mass message interface, I need this adaptive sub-view number to change its own height of view so I wrote a control like thisNow share it and share it with everyone. Of course, if a friend has added some new features to download

The effect diagram looks like this: First of all, let's say to realize Android jump to the Address Book realization idea: 1. Click to jump to the Address Book interface 2. Get Address Book name and cell phone number 3. Callback display name and cell phone number 1 first jump to the Address Book interface Uri uri = uri.parse ("Content://contacts/peo

Public classMainactivityextendsactionbaractivity {PrivateTextView Mtextview; @Overrideprotected voidonCreate (Bundle savedinstancestate) {//TODO auto-generated Method Stub Super. OnCreate (savedinstancestate); Setcontentview (R.layout.activity_main); //Gets the current project version numberMtextview =(TextView) Findviewbyid (R.ID.TEXTVIEW1); Try{getversionname (); } Catch(Exception e) {//TODO auto-generated Catch blockE.printstacktrace (); } //

breakpoints, there will be a small probability of abnormal events, there are 2 kinds:1) file size exception.2) file parsing exception. For example, the apk file, normal words can be seen in the file manager has its own logo apk, and failure will appear parsing package failure, logo for the Android logoThe workaround is simple.is when the progress is equal to 100%, read the current APK file MD5 value, that is, according to MessageDigest to obtain and

information in the XML file. AAPT P[ackage] [-d][-f][-m][-u][-v][-x][-z][-m Androidmanifest.xml] Pack Android resources. It will read the assets and resources provided-m-a-s or raw-files-dir parameters. -J-p-F and-R controls the output options for the file. AAPT R[emove] [-v] file. {zip,jar,apk} file1 [File2 ...] Deletes the specified file from the zip-compatible file. AAPT A[DD] [-v] file. {zip,jar,apk} file1 [File2 ...] The specified file is

= Editable.length (); } //Set the location where the new cursor is located Selection.setselection (editable, selendindex); } } } The call to the corresponding activity part is:[Java]View Plaincopy Package cie.textedit; Import android.app.Activity; Import Android.os.Bundle; Import Android.text.InputFilter; Import Android.widget.EditText; Public class Texteditactivity extends Activity { /** Called when the activity is first created. * / @Override publ

EditText properties have been encapsulated in the relevant settings, the previous article also mentioned, unfamiliar can go to see the previous EditText attribute Daquan, here focus on the input restriction properties: android:digits= "1234567890.+-*/%\n ( "Limit input boxes can only enter their own definition of these strings if the input other will not be displayed android:phonenumber=" true "limit input box can only enter mobile phone number androi

Android Studio: version number of the Support Library dependent package, androidlibrary When we useRecyclerViewIf you want to use a specific version, how can you know the version number? If you have used this library in your notebook, it will be saved on the local hard disk.Local Storage path of Android dependent packa

Understand that Volley listView of the android network library loads a large number of images, I. attach an image Volley uses ImageRequest to retrieve images on the network. It specifies a URL and returns a bitmap with an encoded number. Of course, it also provides other convenient features, such as adjusting the image size. The main advantage of using volume is

Attribution to Data sourceHttp://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmxWebxml website also supports other request methods such as soap and so onThe interface is relatively simpleXML version= "1.0" encoding= "Utf-8"?>LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"android:orientation= "vertical"Android:layout_width= "Fill_parent"Android:layout_height= "Fill_parent"Android:paddingtop= "5dip"Android:paddingleft= "5d

Attribution to Data sourceHttp://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmxWebxml website also supports other request methods such as soap and so onThe interface is relatively simpleXML version= "1.0" encoding= "Utf-8"?>LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"android:orientation= "vertical"Android:layout_width= "Fill_parent"Android:layout_height= "Fill_parent"Android:paddingtop= "5dip"Android:paddingleft= "5d

The Android Autocompletetextview control implements similar search hints, with the following effects1. First post the layout code activity_main.xml:Android:layout_width= "Fill_parent"Android:layout_height= "Fill_parent"android:orientation= "Vertical" > Autocompletetextview Android:id= "@+id/autocomplete"Android:layout_width= "Fill_parent"Android:layout_height= "Wrap_content"/> LinearLayout android:layout_width= "Fill_parent"Android:layout_height= "Wra