android getapplicationcontext

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Android XXXActivity and getApplicationContext () are different. android obtains context

Android XXXActivity and getApplicationContext () are different. android obtains context Context can be seen everywhere from the perspective of android. After you view the source code, you will find that it is just an abstract class. The specific implementation is implemented in ContextWrapper. When you view the

Android Xxxactivity and Getapplicationcontext () differences

From the touch of Android, everywhere can see the context of the figure, after viewing the source code you will find that it is only an abstract class, the implementation is implemented in Contextwrapper.When you go to see the source of Android, you will find Activity,service and application are inherited from Contextwrapper, that is, they are the sub-class of the context, then we should give the context of

Differences between this, getApplicationContext (), and getApplication () in Android, getapplication

Differences between this, getApplicationContext (), and getApplication () in Android, getapplicationThis: indicates the current Activity, which represents the current Activity, in other words, Activity. this can be abbreviated as this in Activity.GetApplicationContext (): the entire application lifecycle is destroyed only when the application is destroyed.GetApplication (): share global data in andorid deve

The difference between Activity.this and Getapplicationcontext in Android

Reprint: http://www.myexception.cn/android/1968332.htmlThe difference between Activity.this and Getapplicationcontext in AndroidContext-related content is often encountered in AndroidA brief discussion of the context: in the statement alertdialog.builder Builder = new Alertdialog.builder (this); , the parameter required to be passed is a context, where we are passing in this, then what does this one refer t

Android Baidu Map Sdkinitializer.initialize (Getapplicationcontext ());

Idle bored want to write down the mobile app Baidu map, before I do not say, all to register in Baidu what, but also to digital signature what, I use the Androidstudio direct online search to find the digital signature.This time to focus on the Baidu map to the Android configuration problem,Sdkinitializer.initialize (Getapplicationcontext ()); When you write this sentence, you will find that it is not writt

Android Xxxactivity and Getapplicationcontext () differences

From the touch of Android, everywhere can see the context of the figure, look at the source code you will find that it is only an abstract class, the detailed implementation is implemented in Contextwrapper.When you go to view the source code of Android, you will find activity. Both service and application inherit from Contextwrapper. That is, they are all sub-classes of the context, then how should we give

Use global variable Getapplicationcontext in Android

Defining a user information class/**title: User Login information * @author Java Development group* @version 3.0*/public class Gf_controluserinfo extends Application {... OmittedTo configure global claims in Using Global variablesGf_controluserinfo Gf_controluserinfo = (gf_controluserinfo) getapplicationcontext ();

Turn Android to learn--context and Getapplicationcontext ()

entire application, which clearly exceeds its life cycle. So, here we can only use the activity's this.Error occurred with new Alertdialog.builder (Getapplicationcontext ()):E/androidruntime (5844): android.view.windowmanager$badtokenexception:unable to add window--token null was not for a app LicationThen looked up:Getapplicationcontext () life cycle is the whole application, application destroy it to destroy Activity.this context belongs to activit

Android Learning--context and Getapplicationcontext ()

Have seen a lot of applications inside, readily use Getapplicationcontext (), do not want to say also not willing to say, today reproduced an article to distinguish between the difference:Context-related content is often encountered in AndroidA brief discussion of the context: in the statement alertdialog.builder Builder = new Alertdialog.builder (this); , the parameter required to be passed is a context, where we are passing in this, then what does t

Android Development Note "Context and Getapplicationcontext"

entire application, which clearly exceeds its life cycle. So, here we can only use the activity's this.Error occurred with new Alertdialog.builder (Getapplicationcontext ()):E/androidruntime (5844): android.view.windowmanager$badtokenexception:unable to add window--token null was not for a app LicationThen looked up:Getapplicationcontext () life cycle is the whole application, application destroy it to destroy Activity.this context belongs to activit

Usage of toast in Android

Toast is a mechanism used by Android to display information. Unlike dialog, Toast has no focus and the display time of toast is limited, after a certain period of time, it will automatically disappear. Next we will use an instance to see how to use toast. 1. Default Effect Code Toast. maketext (getapplicationcontext (), "Default toast style ",Toast. length_short). Show (); 2. Custom display

Toast icon Overview

);Image. setImageResource (R. drawable. icon );TextView title = (TextView) layout. findViewById (R. id. tvTitleToast );Title. setText ("Attention ");TextView text = (TextView) layout. findViewById (R. id. tvTextToast );Text. setText ("Fully customized Toast ");Toast = new Toast (getApplicationContext ());Toast. setGravity (Gravity. RIGHT | Gravity. TOP, 12, 40 );Toast. setDuration (Toast. LENGTH_LONG );Toast. setView (layout );Toast. show (); 5. oth

Android development from entry-level to proficient

callback mechanism.3. Java design mode-callback function and observer ModeCardView1. Introduction and use of the new Android5.0 control CardView2. Android CardView Example3. Android CardView Widget-Add Cards to a List using RecyclerViewConfiguration Change1. Problems Caused by Android Configuration change and Solutions2. Handling Runtime ChangesContext1.

Create your own toast

. setimageresource (R. drawable. Icon );Textview Title = (textview) layout. findviewbyid (R. Id. tvtitletoast );Title. settext ("Attention ");Textview text = (textview) layout. findviewbyid (R. Id. tvtexttoast );Text. settext ("Fully customized toast ");Toast = new toast (getapplicationcontext ());Toast. setgravity (gravity. Right | gravity. Top, 12, 40 );Toast. setduration (toast. length_long );Toast. setview (layout );Toast. Show (); 5. other thread

Toast display image

);Toastview. addview (imagecodeproject, 0 );Toast. Show (); 4. Fully customized results Code Layoutinflater Inflater = getlayoutinflater ();View layout = Inflater. Inflate (R. layout. Custom,(Viewgroup) findviewbyid (R. Id. lltoast ));Imageview image = (imageview) Layout. Findviewbyid (R. Id. tvimagetoast );Image. setimageresource (R. drawable. Icon );Textview Title = (textview) layout. findviewbyid (R. Id. tvtitletoast );Title. settext ("Attention ");Textview text = (textview) layout. findvi

Build your own Toast

. setImageResource (R. drawable. icon );TextView title = (TextView) layout. findViewById (R. id. tvTitleToast );Title. setText ("Attention ");TextView text = (TextView) layout. findViewById (R. id. tvTextToast );Text. setText ("Fully customized Toast, 400 phone, http://www.my400800.cn ");Toast = new Toast (getApplicationContext ());Toast. setGravity (Gravity. RIGHT | Gravity. TOP, 12, 40 );Toast. setDuration (Toast. LENGTH_LONG );Toast. setView (layou

Dynamically move the control location in the XML file

Xmlns: Android = "http://schemas.android.com/apk/res/android"Xmlns: launcher = "http://schemas.android.com/apk/res/com.android.launcher2define" Android: Id = "@ + ID/drag_layer"Android: layout_width = "fill_parent"Android: layout_height = "fill_parent">

Toast in Android

toastView = (LinearLayout) toast. getView ();ImageView imageCodeProject = new ImageView (getApplicationContext ());ImageCodeProject. setImageResource (R. drawable. codeprojectlogo );ToastView. addView (imageCodeProject, 0 );Toast. show (); Effect Create Toast for custom LayoutFirst, create the layout of Toast for custom layout: Xmlns: android = "http://schemas.android.com/apk/res/

Android development implementation calculator example, android calculator example

Android development implementation calculator example, android calculator example Example The Code is as follows:Android: id = "@ + id/warpcontent"Android: layout_width = "fill_parent"Android: layout_height = "fill_parent"Android: orientation = "vertical">

Read and Write Android text files (including SD cards)

-----------------------------------------------Package com. eboy. filereadwrite; Import Android. App. activity;Import Android. OS. Bundle;Import Android. OS. environment;Import Android. View. view;Import Android. widget. Button;Import A

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