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high performance, so we recommend the use of Parcelable class.2.Serializable generates a large number of temporary variables when serializing, causing frequent GC.3.Parcelable cannot be used to store data on disk, because Parcelable does not guarantee the continuity of the data in the event of a change in the outside world. Although serializable efficiency is low, it is not advocated, but in this case, it is recommended that you use serializable.Focus on technology, enjoy life! --Yang Zhou qq:8
Android NDK course recording is now available, androidndk
Recently, according to the company's arrangement, we have recorded the content developed by Android NDK. The overall course can be viewed on www.iotekclass.com, which will be displayed on a blog in the future.
This course
From the perspective of enterprise-level business practice, 24 hours through 23 hands-on practical cases, the gradual progress of the Android business-level application development points conquer, Based on years of Android (6 complete hardware products and more than 20 application software) development and enterprise-l
The previous period of time to learn Recyclerview, found that the ListView has a more obvious feeling, so decided to take the inventory of the idea of the ListView, finishing after all after 5.0 popularity, the ListView still has its place. As always, we start from the simple. --standing on the shoulders of giantsTranslated from: https://github.com/codepath/android_guides/wiki/Using-an-ArrayAdapter-with-ListView# Using-a-basic-arrayadapter, may I understand not deep, translation eccentric, take
value of Doinbackgound () //Returns the contents of the HTML pageMessage.settext (result);//Pdialog.dismiss ();}@Override protected void OnPreExecute() {//Task start, you can display a dialog box here, simple to handleMessage.settext ("Start Download"); }@Override protected void onprogressupdate(Integer ... values) {//This parameter is the parameter that accepts publishprogress (Integer) //Update ProgressSystem.out.println (""+ values[0]); Message.settext (""
Chapter: Basic Principles of--robotium Automation (fourth Lecture)Main content and notes:First, control-based1. spinner--drop-down menu2, tabhost--slide Selection menu, similar to phone book3. gallery--Graphics4. progressbar--progress bar5. datepicker--date and time selection control6, checkbox--single box; radiobutton--Mutual exclusion single box; button--General button7. togglebutton--Two-state button controls: Select and not select both states, and display different text for different states8
[] =NewString[] {people.name, people.number}; Uri mcontacts = People.content_uri; Cursor cur = managedquery (mcontacts, columns,//data fields to return NULL,//WHERE clause NULL,//Parameters of the WHERE clause NULL //order-by clauses);if(Cur.movetofirst ()) {String name =NULL; String Phoneno =NULL; do {//Get the value of the fieldName = Cur.getstring (Cur.getcolumnindex (people.name)); Phoneno = cur.getstring (Cur.getcolumnindex (People.num
the above procedures, then we continue to look downSynchronized main usage1. When the method declaration is used, it is placed before the scope operator (public, etc.) and returns the type declaration (void, etc.). That is, only one thread can enter the method at a time, and other threads will be able to invoke the method at this point, only queued, and the current thread (that is, the thread inside the Synchronized method) executes the method before other threads can enter.For example:publicsy
Android self-learning course-ListView is simplified to deep, androidlistview
Some time ago I learned RecyclerView and found that I felt more obvious about ListView. So I decided to sort out the previously checked ListView. After all, before the popularity of 5.0, ListView was useful. As always, we start from a simple one. -- Standing on the shoulders of giants
Translated from: Baidu.Using an ArrayAdapter wi
Build the Android Development Environment build the first Android project, and build the android Development Environment
I personally pay attention to the time it takes to install the development environment. Generally, it will n
(mainactivity. This, Mitems[which], Toast.length_short). Show (); } }); Builder1.create (). Show (); Break; CaseR.id.btn3:progressdialog Mprogressdialog =NewProgressDialog (mainactivity. This); Mprogressdialog.seticon (R.drawable.ic_launcher); Mprogressdialog.settitle ("First progress bar box");//Set progress bar styleMprogressdialog.setprogressstyle (progressdialog.style_horizontal);//Set the maximum value of the progress barMprogressdialog.setmax ( the); Mprog
Description
Android:editable
If set, specifies that the TextView has an input method, and if there is no special designation, it is the text input state.
Android:hint
The prompt message that appears when the text is empty.
Android:inputtype
The type of data that can be placed in a text field to help the input method decide how to let the user enter text.
Android:maxlength
Sets the input filter to limit
course will select two optional courses for further study, including:· Embedded ARM hardware development (public part)· Embedded Linux development· Android mobile developmentAfter the completion of this phase, the number of trainees can reach or exceed 20000 lines, and they have independent
ArticleDirectory
10th class: Gui core system update
11.1 system UI changes
11.2 desktop update
There are many Android versions. in the traditional sense, a large number of device manufacturers are mainly Android 2.2/2.3, but now they need to switch to Android 4. version X. X system vendors and developers focus on the following:
1. Core Tec
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