android getapplicationcontext

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Android Android-use Eclipse to develop the first android Application, android-android

Android Android-use Eclipse to develop the first android Application, android-android Open Eclipse and select File-New-Android Application Project Application Name is our Application Name, which is also the Name we see in the mob

The Toast in Android

= Toast.maketext (Getapplicationcontext (), "toast with pictures", toast.length_long); Toast.setgravity (gravity.center, 0, 0); LinearLayout Toastview = (linearlayout) Toast.getview (); ImageView imagecodeproject = new ImageView (Getapplicationcontext ()); Imagecodeproject.setimageresource (R.drawable.icon); Toastview.addview (imagecodeproject, 0); Toast.show (); Break Case R.id.btncustomtoast

Use of the Android Network Service Discovery (NSD) protocol

);}Three. Connect to network ServicesBy defining a network service connection time listener to poll the resolved network service, you can further obtain the address and port of the network service and then decide whether to connect, sample code:public void Initresolvelistener (view view) {Nsresolvelistener = new Nsdmanager.resolvelistener () {@Overridepublic void Onserviceresolved (Nsdserviceinfo arg0) {//You can get the address and port information for the corresponding network service here, an

Android Silent Installation and uninstallation, android silent uninstall

Android Silent Installation and uninstallation, android silent uninstall Silent means silent and Silent Installation and uninstallation, which means the installation and uninstallation in the background. The download module of the app in a recent app distribution project. After the download is completed, you can install the app to improve the user experience, I added the Silent Installation and uninstallati

Android calls system cameras, Custom cameras, and processes large images,

OnClickListener () {@ Overridepublic void onClick (View v) {if (checkCameraHardWare (getApplicationContext () {Intent intent = new Intent (getApplicationContext (), MyCameraActivity. class); startActivity (intent);} else {Toast. makeText (getApplicationContext (), "No camera exists", Toast. LENGTH_SHORT ). show ();}}}); Custom SurfaceView class: Package cn. pa

Android Storage (Local storage SD card storage sharedpreference SQLite ContentProvider)

This article originates from: http://blog.csdn.net/dt235201314/article/details/73176149SOURCE download welcome Star (updating): Https://github.com/JinBoy23520/CoderToDeveloperByTCLerI. StatementThis week's learning content is Android storage, requirements: Database SQLite related operations, commonly used file access methods, as well as practical learning, the main learning SQLITE,SD card file operation, sharedpreferenceSecond, the effect demonstratio

Android Context is completely parsed, and you do not know the details of Context.

Context, so the result obtained from getApplicationContext () is the instance of MyApplication itself. Some may ask, since the results of these two methods are the same, why does Android provide two methods with repeated functions? In fact, these two methods have a big difference in scope. The getApplication () method has very strong semantics. It can be used to obtain the Application instance at first gla

Android calls system cameras, Custom cameras, and processing large images

). setOnClickListener (new OnClickListener () {@ Overridepublic void onClick (View v) {if (checkCameraHardWare (getApplicationContext () {Intent intent = new Intent (getApplicationContext (), MyCameraActivity. class); startActivity (intent);} else {Toast. makeText (getApplicationContext (), "No camera exists", Toast. LENGTH_SHORT ). show ();}}}); Custom Surface

Android SDK Android NDK android Studio official download Address

Android SDK Android NDK android Studio officialIf the download speed is too slow, please use thunder, Baidu cloud offline and other methods to download.For Linux systems, if you cannot upgrade online, see belowsudo vi/etc/hostsAdd to74.125.206.93 dl-ssl.google.comHere are the various. 2014.7ADT BundleHttp://dl.google.com/

Download Android development classic books-Android 4 advanced programming, crazy Android handout, Android Application Development (Guo Hongzhi) "Android Application Case Development Daquan" and "Android 3D Game Development Technology",

Download Android development classic books-Android 4 advanced programming, crazy Android handout, Android Application Development (Guo Hongzhi) "Android Application Case Development Daquan" and "Android 3D Game Development Technol

Android development-data storage II, android Data Storage

Android development-data storage II, android Data Storage This chapter continues to explain how to store and manage data in Android development. Knowledge Point: SQLite and SwipeRefreshLayout controls are refreshed.1. Functional Requirements Exercise Using SQLite Create a logon interface. The database field contains the user name, password, and logon status. A

Post-release statistics of Android applications-Baidu mobile statistics applications and android statistics

android. OS. bundle; import android. support. v7.app. appCompatActivity; import android. util. log; import com. baidu. frontia. frontia; import com. baidu. frontia. api. frontiaStatistics; import cn.edu. zafu. channeldemo. config. config;/*** User: lizhangqu (513163535@qq.com) * Date: 2015-07-04 * Time: */public class BaseActivity extends AppCompatActivity {priv

Android users click the return key twice to exit. android users click

;}}; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main) ;}@ Override public boolean onKeyDown (int keyCode, KeyEvent event) {if (keyCode = KeyEvent. KEYCODE_BACK) {exit (); return false;} return super. onKeyDown (keyCode, event);} private void exit () {if (! IsExit) {isExit = true; Toast. makeText (getApplicationContext (), "exit the program again", Toast. LE

Common Errors and skills in Android development and common errors in android Development

,Android keypadSetWidgetSolution to the push: Outside the keyboard area is the edge of the screen. when defining the layout file, android: gravity = "bottom" will be squeezed to the top! Solution: Write android: windowSoftInputMode = "adjustPan" to the Activity corresponding to the androidMainfest. xml file of this project" Or the layout file is case-insensitive

Android data file access to the storage card, android access

Android data file access to the storage card, android access From: http://blog.csdn.net/jianghuiquan/article/details/8569233 Package com. example. yanlei. wifi; import android. OS. bundle; import android. OS. environment; import android. support. v7.app. appCompatActivity;

Android mobile guard-pop-up dialog box, android guard

Android mobile guard-pop-up dialog box, android guard In the article "Android mobile guard-Parse json and message mechanisms to send different types of messages", message mechanisms have not yet been fully implemented to send different types of information. In the case of exceptions, the following code prompts an exception in the toast prompt: Private Handler mHa

Android-context everything.

(); LOG.D ("TAG", "Getapplicationcontext is" + AppContext); } Again, we print out the results of the getapplicationcontext (), and now rerun the code, as shown in the following:Hey? It seems that the printed results are the same, and even the memory addresses behind them are the same, and they appear to be the same object. In fact, this result is also very good understanding, because

Android implements Silent Installation and uninstallation

Method 1: [call the interface method. Because some APIs for installing and detaching an application are hidden, you must download the Android system source code, after development and compilation in the source code, use the MM command to compile and generate an APK file] Import java. Io. file;Import Android. App. activity;Import Android. OS. Bundle;Import

Android Development Series (5): Saving and reading files in Android applications

FileService object, getApplicationContext () returns the context of the application, and the lifecycle is the entire application, the application destroys FileService service = new FileService (getApplicationContext (); try {service. save (filename, content); // call the save () method to save the file Toast. makeText (getApplicationContext (), R. string. succes

Dynamic Loading Mechanism in Android

In the current software and hardware environment, Native apps and Web apps have obvious advantages in user experience, but in actual projects, some clients are frequently upgraded due to frequent business changes, this results in poor user experience, which is precisely the advantage of Web apps. This article will sort out and share with you the information about how Android dynamically loads jar files on the Internet, and try to improve the frequent

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